Further enhanced backend dynamics force confirmation trigger.

Fixed frontend packaging.
Updated comments.
2025-10-16 20:16:37 +00:00 · 2022-12-18 19:41:13 +08:00 · 2022-12-18 16:59:38 +08:00 · 2022-12-18 14:03:22 +08:00 · 2022-12-18 12:20:44 +08:00 · 2022-12-17 18:22:52 +08:00
396 changed files with 31033 additions and 19351 deletions
--- a/ConcerningEdgeCases.md
+++ b/ConcerningEdgeCases.md
@@ -1,15 +1,21 @@
-# Potential avalanche from local lag
+# What to be concerned for internet syncing
+1. Server received too late (solution: force confirmation)
+2. Client received too late (solution: prediction and frame chasing, big impact on user experience because the graphics will be inconsistent if mismatches occur too often)
+
+# Potential avalanche from `ACTIVE SLOW TICKER`
 Under the current "input delay" algorithm, the lag of a single player would cause all the other players to receive outdated commands, e.g. when at a certain moment   
- player#1: renderFrameId = 100, significantly lagged due to local CPU overheated
+- player#1: renderFrameId = 100, **still active in battle but significantly lagged** due to local CPU overheated
 - player#2: renderFrameId = 240
 - player#3: renderFrameId = 239
 - player#4: renderFrameId = 242

 players #2, #3 #4 would receive "outdated(in their subjective feelings) but all-confirmed commands" from then on, thus forced to rollback and chase many frames - the lag due to "large range of frame-chasing" would then further deteriorate the situation - like an avalanche.   

-In a "no-server & p2p" setup, I couldn't think of a proper way to cope with such edge case. Solely on the frontend we could only mitigate the impact to players #2, #3, #4, e.g. a potential lag due to "large range of frame-chasing" is proactively avoided in `<proj-root>/frontend/assets/scripts/Map.js, function update(dt)`.
+**BE CAUTIOUS, THIS `ACTIVE SLOW TICKER` SITUATION HAPPENS QUITE OFTEN FOR REAL DEVICES** where different operating systems and temporary CPU overheat cause different lags for different player in a same battle! If not properly handled, slow tickers would be `inputing in the "history" of other players`, resulting in too frequent prediction mismatch and thus inconsistent graphics for other players!

-However in a "server as authority" setup, the server could force confirming an inputFrame without player#1's upsync, and notify player#1 to apply a "roomDownsyncFrame" as well as drop all its outdated local inputFrames. 
+In a "no-server & p2p" setup, I couldn't think of a proper way to cope with such edge case. Solely on the frontend we could only mitigate the impact to players #2, #3, #4, e.g. a potential lag due to "large range of frame-chasing" is proactively avoided in `<proj-root>/frontend/assets/scripts/Map.js, function update(dt)`. 
+
+To be fair, **a "p2p" setup can reduce round-trip to single-trip**, but w/o a point of authority in such case player#1 needs a way to recognize the slowness (e.g. check the received peer inputs) and ticks faster for a while to catch up; in contrast in a "server as authority" setup, the server could force confirming an inputFrame without player#1's upsync, and notify player#1 to apply a "roomDownsyncFrame" as well as drop all its outdated local inputFrames. 

 # Start up frames
 renderFrameId      |   generatedInputFrameId    |  toApplyInputFrameId            
--- a/README.md
+++ b/README.md
@@ -1,11 +1,26 @@
 # Preface 

-This project is a demo for a websocket-based input synchronization method inspired by [GGPO](https://www.ggpo.net/).   
-![screenshot-1](./screenshot-1.png)
+This project is a demo for a websocket-based rollback netcode inspired by [GGPO](https://github.com/pond3r/ggpo/blob/master/doc/README.md).

-Please checkout [this demo video](https://pan.baidu.com/s/1aM6e8IWaJszFCYAsRjt19g?pwd=z02c) to see whether the source codes are doing what you expect for synchronization.
+_(the following gif is sped up to ~1.5x for file size reduction, kindly note that animations are resumed from a partial progress)_

-The video mainly shows the following feature (yet I'm not surprised if they're not obvious): when a player didn't have its input arrived at the backend in time (e.g. due to local lag, network delay or reconnection), backend forces confirmation of a prediction of its own and sends the confirmed input together w/ a reference render frame to that player.
+![gif_demo](./charts/jump_sync_spedup.gif)
+
+Please also checkout [this demo video](https://pan.baidu.com/s/1Lmot9cb0pYylfUvC8G4fDg?pwd=ia97) to see how this demo carries out a full 60fps synchronization with the help of _batched input upsync/downsync_ for satisfying network I/O performance.
+
+The video mainly shows the following features.
+- The backend receives inputs from frontend peers and broadcasts back for synchronization.
+- The game is recovered for a player upon reconnection.
+- Both backend(Golang) and frontend(JavaScript) execute collision detection and handle collision contacts by the same algorithm. The backend dynamics is togglable by [Room.BackendDynamicsEnabled](https://github.com/genxium/DelayNoMore/blob/v0.5.2/battle_srv/models/room.go#L813), but **when turned off the game couldn't support recovery upon reconnection**.
+
+_(how input delay roughly works)_
+
+![input_delay_intro](./charts/InputDelayIntro.jpg)
+
+_(how rollback-and-chase in this project roughly works)_
+
+![rollback_and_chase_intro](./charts/RollbackAndChase.jpg)
+![floating_point_accumulation_err](./charts/AvoidingFloatingPointAccumulationErr.jpg)

 # 1. Building & running

@@ -19,7 +34,7 @@ The video mainly shows the following feature (yet I'm not surprised if they're n
 - [protobuf CLI](https://developers.google.com/protocol-buffers/docs/downloads) (optional, only for development)

 ### Frontend
- [CocosCreator v2.2.1](https://www.cocos.com/en/cocos-creator-2-2-1-released-with-performance-improvements) (mandatory, **ONLY AVAILABLE on Windows or OSX and should be exactly this version**, DON'T use any other version because CocosCreator is well-known for new versions not being backward incompatible)
+- [CocosCreator v2.2.1](https://www.cocos.com/en/cocos-creator-2-2-1-released-with-performance-improvements) (mandatory, **ONLY AVAILABLE on Windows or OSX and should be exactly this version**, DON'T use any other version because CocosCreator is well-known for new versions not being backward compatible)
 - [protojs](https://www.npmjs.com/package/protojs) (optional, only for development)

 ## 1.2 Provisioning
@@ -64,7 +79,7 @@ The easy way is to try out 2 players with test accounts on a same machine.
 - Open one browser instance, visit _http://localhost:7456?expectedRoomId=1_, input `add`on the username box and click to request a captcha, this is a test account so a captcha would be returned by the backend and filled automatically (as shown in the figure below), then click and click to proceed to a matching scene.
 - Open another browser instance, visit _http://localhost:7456?expectedRoomId=1_, input `bdd`on the username box and click to request a captcha, this is another test account so a captcha would be returned by the backend and filled automatically, then click and click to proceed, when matched a `battle`(but no competition rule yet) would start.
 - Try out the onscreen virtual joysticks to move the cars and see if their movements are in-sync.
-![screenshot-2](./screenshot-2.png)
+![screenshot-2](./charts/screenshot-2.png)

 ## 2 Troubleshooting

--- a/battle_srv/Makefile
+++ b/battle_srv/Makefile
@@ -1,5 +1,7 @@
 PROJECTNAME=server.exe
 ROOT_DIR=.
+#GOPROXY=https://mirrors.aliyun.com/goproxy 
+GOPROXY=https://goproxy.io
 all: help

 gen-constants:
@@ -13,13 +15,13 @@ run-test-and-hotreload:
 	ServerEnv=TEST CompileDaemon -log-prefix=false -build="go build"  -command="./$(PROJECTNAME)"

 build:
-	go build -o $(ROOT_DIR)/$(PROJECTNAME)
+	GOPROXY=$(GOPROXY) go build -o $(ROOT_DIR)/$(PROJECTNAME)

 run-prod: build-prod
 	./$(PROJECTNAME)

 build-prod:
-	go build -ldflags "-s -w -X main.VERSION=$(shell git rev-parse --short HEAD)-$(shell date "+%Y%m%d-%H:%M:%S")" -o $(ROOT_DIR)/$(PROJECTNAME)
+	GOPROXY=$(GOPROXY) go build -ldflags "-s -w -X main.VERSION=$(shell git rev-parse --short HEAD)-$(shell date "+%Y%m%d-%H:%M:%S")" -o $(ROOT_DIR)/$(PROJECTNAME)

 .PHONY: help

--- a/battle_srv/api/v1/player.go
+++ b/battle_srv/api/v1/player.go
@@ -1,6 +1,12 @@
 package v1

 import (
+	"battle_srv/api"
+	. "battle_srv/common"
+	"battle_srv/common/utils"
+	"battle_srv/models"
+	. "battle_srv/protos"
+	"battle_srv/storage"
 	"bytes"
 	"crypto/sha256"
 	"encoding/hex"
@@ -10,11 +16,6 @@ import (
 	"go.uber.org/zap"
 	"io/ioutil"
 	"net/http"
-	"server/api"
-	. "server/common"
-	"server/common/utils"
-	"server/models"
-	"server/storage"
 	"strconv"

 	. "dnmshared"
@@ -79,7 +80,6 @@ func (p *playerController) SMSCaptchaGet(c *gin.Context) {
 		c.Set(api.RET, Constants.RetCode.UnknownError)
 		return
 	}
-	// Redis剩余时长校验
 	if ttl >= ConstVals.Player.CaptchaMaxTTL {
 		Logger.Info("There's an existing SmsCaptcha record in Redis-server: ", zap.String("key", redisKey), zap.Duration("ttl", ttl))
 		c.Set(api.RET, Constants.RetCode.SmsCaptchaRequestedTooFrequently)
@@ -89,7 +89,6 @@ func (p *playerController) SMSCaptchaGet(c *gin.Context) {
 	pass := false
 	var succRet int
 	if Conf.General.ServerEnv == SERVER_ENV_TEST {
-		// 测试环境，优先从数据库校验`player.name`，不通过再走机器人magic name校验
 		player, err := models.GetPlayerByName(req.Num)
 		if nil == err && nil != player {
 			pass = true
@@ -98,7 +97,6 @@ func (p *playerController) SMSCaptchaGet(c *gin.Context) {
 	}

 	if !pass {
-		// 机器人magic name校验，不通过再走手机号校验
 		player, err := models.GetPlayerByName(req.Num)
 		if nil == err && nil != player {
 			pass = true
@@ -111,7 +109,6 @@ func (p *playerController) SMSCaptchaGet(c *gin.Context) {
 			succRet = Constants.RetCode.Ok
 			pass = true
 		}
-		// Hardecoded 只验证国内手机号格式
 		if req.CountryCode == "86" {
 			if RE_CHINA_PHONE_NUM.MatchString(req.Num) {
 				succRet = Constants.RetCode.Ok
@@ -133,7 +130,6 @@ func (p *playerController) SMSCaptchaGet(c *gin.Context) {
 	}{Ret: succRet}
 	var captcha string
 	if ttl >= 0 {
-		// 已有未过期的旧验证码记录，续验证码有效期。
 		storage.RedisManagerIns.Expire(redisKey, ConstVals.Player.CaptchaExpire)
 		captcha = storage.RedisManagerIns.Get(redisKey).Val()
 		if ttl >= ConstVals.Player.CaptchaExpire/4 {
@@ -147,7 +143,6 @@ func (p *playerController) SMSCaptchaGet(c *gin.Context) {
 		}
 		Logger.Info("Extended ttl of existing SMSCaptcha record in Redis:", zap.String("key", redisKey), zap.String("captcha", captcha))
 	} else {
-		// 校验通过，进行验证码生成处理
 		captcha = strconv.Itoa(utils.Rand.Number(1000, 9999))
 		if succRet == Constants.RetCode.Ok {
 			getSmsCaptchaRespErrorCode := sendSMSViaVendor(req.Num, req.CountryCode, captcha)
@@ -234,7 +229,6 @@ func (p *playerController) WechatLogin(c *gin.Context) {
 		return
 	}

-	//baseInfo ResAccessToken 获取用户授权access_token的返回结果
 	baseInfo, err := utils.WechatIns.GetOauth2Basic(req.Authcode)

 	if err != nil {
@@ -250,7 +244,6 @@ func (p *playerController) WechatLogin(c *gin.Context) {
 		c.Set(api.RET, Constants.RetCode.WechatServerError)
 		return
 	}
-	//fserver不会返回openId
 	userInfo.OpenID = baseInfo.OpenID

 	player, err := p.maybeCreatePlayerWechatAuthBinding(userInfo)
@@ -316,7 +309,6 @@ func (p *playerController) WechatGameLogin(c *gin.Context) {
 		return
 	}

-	//baseInfo ResAccessToken 获取用户授权access_token的返回结果
 	baseInfo, err := utils.WechatGameIns.GetOauth2Basic(req.Authcode)

 	if err != nil {
@@ -337,7 +329,6 @@ func (p *playerController) WechatGameLogin(c *gin.Context) {
 		c.Set(api.RET, Constants.RetCode.WechatServerError)
 		return
 	}
-	//fserver不会返回openId
 	userInfo.OpenID = baseInfo.OpenID

 	player, err := p.maybeCreatePlayerWechatGameAuthBinding(userInfo)
@@ -395,7 +386,6 @@ func (p *playerController) IntAuthTokenLogin(c *gin.Context) {
 		return
 	}

-	//kobako: 从player获取display name等
 	player, err := models.GetPlayerById(playerLogin.PlayerID)
 	if err != nil {
 		Logger.Error("Get player by id in IntAuthTokenLogin function error: ", zap.Error(err))
@@ -479,7 +469,6 @@ func (p *playerController) TokenAuth(c *gin.Context) {
 	c.Abort()
 }

-// 以下是内部私有函数
 func (p *playerController) maybeCreateNewPlayer(req smsCaptchaReq) (*models.Player, error) {
 	extAuthID := req.extAuthID()
 	if Conf.General.ServerEnv == SERVER_ENV_TEST {
@@ -492,7 +481,7 @@ func (p *playerController) maybeCreateNewPlayer(req smsCaptchaReq) (*models.Play
 			Logger.Info("Got a test env player:", zap.Any("phonenum", req.Num), zap.Any("playerId", player.Id))
 			return player, nil
 		}
-	} else { //正式环境检查是否为bot用户
+	} else {
 		botPlayer, err := models.GetPlayerByName(req.Num)
 		if err != nil {
 			Logger.Error("Seeking bot player error:", zap.Error(err))
@@ -537,29 +526,31 @@ func (p *playerController) maybeCreatePlayerWechatAuthBinding(userInfo utils.Use
 			return nil, err
 		}
 		if player != nil {
-			{ //更新玩家姓名及头像
-				updateInfo := models.Player{
+			updateInfo := models.Player{
+				PlayerDownsync: PlayerDownsync{
 					Avatar:      userInfo.HeadImgURL,
 					DisplayName: userInfo.Nickname,
-				}
-				tx := storage.MySQLManagerIns.MustBegin()
-				defer tx.Rollback()
-				ok, err := models.Update(tx, player.Id, &updateInfo)
-				if err != nil && ok != true {
-					return nil, err
-				} else {
-					tx.Commit()
-				}
+				},
+			}
+			tx := storage.MySQLManagerIns.MustBegin()
+			defer tx.Rollback()
+			ok, err := models.Update(tx, player.Id, &updateInfo)
+			if err != nil && ok != true {
+				return nil, err
+			} else {
+				tx.Commit()
 			}
 			return player, nil
 		}
 	}
 	now := utils.UnixtimeMilli()
 	player := models.Player{
-		CreatedAt:   now,
-		UpdatedAt:   now,
-		DisplayName: userInfo.Nickname,
-		Avatar:      userInfo.HeadImgURL,
+		PlayerDownsync: PlayerDownsync{
+			DisplayName: userInfo.Nickname,
+			Avatar:      userInfo.HeadImgURL,
+		},
+		CreatedAt: now,
+		UpdatedAt: now,
 	}
 	return p.createNewPlayer(player, userInfo.OpenID, int(Constants.AuthChannel.Wechat))
 }
@@ -575,29 +566,31 @@ func (p *playerController) maybeCreatePlayerWechatGameAuthBinding(userInfo utils
 			return nil, err
 		}
 		if player != nil {
-			{ //更新玩家姓名及头像
-				updateInfo := models.Player{
+			updateInfo := models.Player{
+				PlayerDownsync: PlayerDownsync{
 					Avatar:      userInfo.HeadImgURL,
 					DisplayName: userInfo.Nickname,
-				}
-				tx := storage.MySQLManagerIns.MustBegin()
-				defer tx.Rollback()
-				ok, err := models.Update(tx, player.Id, &updateInfo)
-				if err != nil && ok != true {
-					return nil, err
-				} else {
-					tx.Commit()
-				}
+				},
+			}
+			tx := storage.MySQLManagerIns.MustBegin()
+			defer tx.Rollback()
+			ok, err := models.Update(tx, player.Id, &updateInfo)
+			if err != nil && ok != true {
+				return nil, err
+			} else {
+				tx.Commit()
 			}
 			return player, nil
 		}
 	}
 	now := utils.UnixtimeMilli()
 	player := models.Player{
-		CreatedAt:   now,
-		UpdatedAt:   now,
-		DisplayName: userInfo.Nickname,
-		Avatar:      userInfo.HeadImgURL,
+		PlayerDownsync: PlayerDownsync{
+			DisplayName: userInfo.Nickname,
+			Avatar:      userInfo.HeadImgURL,
+		},
+		CreatedAt: now,
+		UpdatedAt: now,
 	}
 	return p.createNewPlayer(player, userInfo.OpenID, int(Constants.AuthChannel.WechatGame))
 }
@@ -672,15 +665,13 @@ func sendSMSViaVendor(mobile string, nationcode string, captchaCode string) int
 		Nationcode: nationcode,
 	}
 	var captchaExpireMin string
-	//短信有效期hardcode
 	if Conf.General.ServerEnv == SERVER_ENV_TEST {
-		//测试环境下有效期为20秒 先hardcode了
-		captchaExpireMin = "0.5"
+		captchaExpireMin = "0.5" // Hardcoded
 	} else {
 		captchaExpireMin = strconv.Itoa(int(ConstVals.Player.CaptchaExpire) / 60000000000)
 	}
 	params := [2]string{captchaCode, captchaExpireMin}
-	appkey := "41a5142feff0b38ade02ea12deee9741" // TODO: Should read from config file!
+	appkey := "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" // TODO: Should read from config file!
 	rand := strconv.Itoa(utils.Rand.Number(1000, 9999))
 	now := utils.UnixtimeSec()

@@ -694,7 +685,7 @@ func sendSMSViaVendor(mobile string, nationcode string, captchaCode string) int
 		Extend: "",
 		Params: &params,
 		Sig:    sig,
-		Sign:   "洛克互娱",
+		Sign:   "YYYYYYYYYYYYYYYYY",
 		Tel:    tel,
 		Time:   now,
 		Tpl_id: 207399,
@@ -705,7 +696,7 @@ func sendSMSViaVendor(mobile string, nationcode string, captchaCode string) int
 		Logger.Info("json marshal", zap.Any("err:", err))
 		return -1
 	}
-	resp, err := http.Post("https://yun.tim.qq.com/v5/tlssmssvr/sendsms?sdkappid=1400150185&random="+rand,
+	resp, err := http.Post("https://yun.tim.qq.com/v5/tlssmssvr/sendsms?sdkappid=uuuuuuuuuuuuuuuuuuuuuuuu&random="+rand,
 		"application/json",
 		req)
 	if err != nil {
--- a/battle_srv/common/utils/wechat.go
+++ b/battle_srv/common/utils/wechat.go
@@ -1,6 +1,8 @@
 package utils

 import (
+	. "battle_srv/common"
+	. "battle_srv/configs"
 	"bytes"
 	"crypto/sha1"
 	. "dnmshared"
@@ -11,8 +13,6 @@ import (
 	"io/ioutil"
 	"math/rand"
 	"net/http"
-	. "server/common"
-	. "server/configs"
 	"sort"
 	"time"
 )
@@ -250,10 +250,6 @@ func (w *wechat) getTicketFromServer() (ticket resTicket, err error) {
 		return
 	}

-	//jsAPITicketCacheKey := fmt.Sprintf("jsapi_ticket_%s", w.config.AppID)
-	//expires := ticket.ExpiresIn - 1500
-	//set
-	//err = js.Cache.Set(jsAPITicketCacheKey, ticket.Ticket, time.Duration(expires)*time.Second)
 	return
 }

@@ -276,9 +272,6 @@ func (w *wechat) getAccessTokenFromServer() (accessToken string, err error) {
 		return
 	}

-	//accessTokenCacheKey := fmt.Sprintf("access_token_%s", w.config.AppID)
-	//expires := r.ExpiresIn - 1500
-	//set to redis err = ctx.Cache.Set(accessTokenCacheKey, r.AccessToken, time.Duration(expires)*time.Second)
 	accessToken = r.AccessToken
 	return
 }
--- a/battle_srv/env_tools/load_pre_conf.go
+++ b/battle_srv/env_tools/load_pre_conf.go
@@ -1,15 +1,16 @@
 package env_tools

 import (
+	. "battle_srv/common"
+	"battle_srv/common/utils"
+	"battle_srv/models"
+	. "battle_srv/protos"
+	"battle_srv/storage"
 	. "dnmshared"
 	sq "github.com/Masterminds/squirrel"
 	"github.com/jmoiron/sqlx"
 	_ "github.com/mattn/go-sqlite3"
 	"go.uber.org/zap"
-	. "server/common"
-	"server/common/utils"
-	"server/models"
-	"server/storage"
 )

 func LoadPreConf() {
@@ -71,7 +72,6 @@ func createMysqlData(rows *sqlx.Rows, v string) {
 	}
 }

-// 加上tableName参数, 用于pre_conf_data.sqlite里bot_player表的复用 --kobako
 func maybeCreateNewPlayerFromBotTable(db *sqlx.DB, tableName string) {
 	var ls []*dbBotPlayer
 	err := db.Select(&ls, "SELECT name, magic_phone_country_code, magic_phone_num, display_name FROM "+tableName)
@@ -88,7 +88,6 @@ func maybeCreateNewPlayerFromBotTable(db *sqlx.DB, tableName string) {
 		panic(err)
 	}
 	query = storage.MySQLManagerIns.Rebind(query)
-	// existNames := make([]string, len(ls), len(ls))
 	var existPlayers []*models.Player
 	err = storage.MySQLManagerIns.Select(&existPlayers, query, args...)
 	if nil != err {
@@ -99,13 +98,11 @@ func maybeCreateNewPlayerFromBotTable(db *sqlx.DB, tableName string) {
 		var flag bool
 		for _, v := range existPlayers {
 			if botPlayer.Name == v.Name {
-				// 已有数据，合并处理
 				flag = true
 				break
 			}
 		}
 		if !flag {
-			// 找不到，新增
 			Logger.Debug("create", zap.Any(tableName, botPlayer))
 			err := createNewBotPlayer(botPlayer)
 			if err != nil {
@@ -120,11 +117,14 @@ func createNewBotPlayer(p *dbBotPlayer) error {
 	defer tx.Rollback()
 	now := utils.UnixtimeMilli()
 	player := models.Player{
-		CreatedAt:   now,
-		UpdatedAt:   now,
-		Name:        p.Name,
-		DisplayName: p.DisplayName,
+		CreatedAt: now,
+		UpdatedAt: now,
+		PlayerDownsync: PlayerDownsync{
+			Name:        p.Name,
+			DisplayName: p.DisplayName,
+		},
 	}
+
 	err := player.Insert(tx)
 	if err != nil {
 		return err
--- a/battle_srv/env_tools/test_env_db.go
+++ b/battle_srv/env_tools/test_env_db.go
@@ -1,11 +1,12 @@
 package env_tools

 import (
+	. "battle_srv/common"
+	"battle_srv/common/utils"
+	"battle_srv/models"
+	. "battle_srv/protos"
+	"battle_srv/storage"
 	. "dnmshared"
-	. "server/common"
-	"server/common/utils"
-	"server/models"
-	"server/storage"

 	"github.com/jmoiron/sqlx"
 	_ "github.com/mattn/go-sqlite3"
@@ -75,9 +76,11 @@ func createNewPlayer(p *dbTestPlayer) error {
 	defer tx.Rollback()
 	now := utils.UnixtimeMilli()
 	player := models.Player{
+		PlayerDownsync: PlayerDownsync{
+			Name: p.Name,
+		},
 		CreatedAt: now,
 		UpdatedAt: now,
-		Name:      p.Name,
 	}
 	err := player.Insert(tx)
 	if err != nil {
--- a/battle_srv/go.mod
+++ b/battle_srv/go.mod
@@ -1,4 +1,4 @@
-module server
+module battle_srv

 go 1.19

--- a/battle_srv/main.go
+++ b/battle_srv/main.go
@@ -1,19 +1,19 @@
 package main

 import (
+	"battle_srv/api"
+	"battle_srv/api/v1"
+	. "battle_srv/common"
+	"battle_srv/env_tools"
+	"battle_srv/models"
+	"battle_srv/storage"
+	"battle_srv/ws"
 	"context"
 	"fmt"
 	"net/http"
 	"os"
 	"os/signal"
 	"path/filepath"
-	"server/api"
-	"server/api/v1"
-	. "server/common"
-	"server/env_tools"
-	"server/models"
-	"server/storage"
-	"server/ws"
 	"syscall"
 	"time"

--- a/battle_srv/models/barrier.go
+++ b/battle_srv/models/barrier.go
@@ -1,7 +1,7 @@
 package models

 import (
-	. "dnmshared"
+	. "dnmshared/sharedprotos"
 )

 type Barrier struct {
--- a/battle_srv/models/pb_type_convert.go
+++ b/battle_srv/models/pb_type_convert.go
@@ -1,85 +1,37 @@
 package models

 import (
-	. "dnmshared"
-	pb "server/pb_output"
+	. "battle_srv/protos"
 )

-func toPbVec2D(modelInstance *Vec2D) *pb.Vec2D {
-	toRet := &pb.Vec2D{
-		X: modelInstance.X,
-		Y: modelInstance.Y,
-	}
-	return toRet
-}
-
-func toPbPolygon2D(modelInstance *Polygon2D) *pb.Polygon2D {
-	toRet := &pb.Polygon2D{
-		Anchor: toPbVec2D(modelInstance.Anchor),
-		Points: make([]*pb.Vec2D, len(modelInstance.Points)),
-	}
-	for index, p := range modelInstance.Points {
-		toRet.Points[index] = toPbVec2D(p)
-	}
-	return toRet
-}
-
-func toPbVec2DList(modelInstance *Vec2DList) *pb.Vec2DList {
-	toRet := &pb.Vec2DList{
-		Vec2DList: make([]*pb.Vec2D, len(*modelInstance)),
-	}
-	for k, v := range *modelInstance {
-		toRet.Vec2DList[k] = toPbVec2D(v)
-	}
-	return toRet
-}
-
-func ToPbVec2DListMap(modelInstances map[string]*Vec2DList) map[string]*pb.Vec2DList {
-	toRet := make(map[string]*pb.Vec2DList, len(modelInstances))
-	for k, v := range modelInstances {
-		toRet[k] = toPbVec2DList(v)
-	}
-	return toRet
-}
-
-func toPbPolygon2DList(modelInstance *Polygon2DList) *pb.Polygon2DList {
-	toRet := &pb.Polygon2DList{
-		Polygon2DList: make([]*pb.Polygon2D, len(*modelInstance)),
-	}
-	for k, v := range *modelInstance {
-		toRet.Polygon2DList[k] = toPbPolygon2D(v)
-	}
-	return toRet
-}
-
-func ToPbPolygon2DListMap(modelInstances map[string]*Polygon2DList) map[string]*pb.Polygon2DList {
-	toRet := make(map[string]*pb.Polygon2DList, len(modelInstances))
-	for k, v := range modelInstances {
-		toRet[k] = toPbPolygon2DList(v)
-	}
-	return toRet
-}
-
-func toPbPlayers(modelInstances map[int32]*Player) map[int32]*pb.Player {
-	toRet := make(map[int32]*pb.Player, 0)
+func toPbPlayers(modelInstances map[int32]*Player, withMetaInfo bool) map[int32]*PlayerDownsync {
+	toRet := make(map[int32]*PlayerDownsync, 0)
 	if nil == modelInstances {
 		return toRet
 	}

 	for k, last := range modelInstances {
-		toRet[k] = &pb.Player{
-			Id: last.Id,
-			X:  last.X,
-			Y:  last.Y,
-			Dir: &pb.Direction{
-				Dx: last.Dir.Dx,
-				Dy: last.Dir.Dy,
-			},
-			Speed:       last.Speed,
-			BattleState: last.BattleState,
-			Score:       last.Score,
-			Removed:     last.Removed,
-			JoinIndex:   last.JoinIndex,
+		toRet[k] = &PlayerDownsync{
+			Id:             last.Id,
+			VirtualGridX:   last.VirtualGridX,
+			VirtualGridY:   last.VirtualGridY,
+			DirX:           last.DirX,
+			DirY:           last.DirY,
+			VelX:           last.VelX,
+			VelY:           last.VelY,
+			Speed:          last.Speed,
+			BattleState:    last.BattleState,
+			CharacterState: last.CharacterState,
+			InAir:          last.InAir,
+			JoinIndex:      last.JoinIndex,
+			ColliderRadius: last.ColliderRadius,
+			Score:          last.Score,
+			Removed:        last.Removed,
+		}
+		if withMetaInfo {
+			toRet[k].Name = last.Name
+			toRet[k].DisplayName = last.DisplayName
+			toRet[k].Avatar = last.Avatar
 		}
 	}

--- a/battle_srv/models/player.go
+++ b/battle_srv/models/player.go
@@ -1,16 +1,19 @@
 package models

 import (
-	"database/sql"
+	. "battle_srv/protos"
+	"battle_srv/storage"
 	. "dnmshared"
 	"fmt"
 	sq "github.com/Masterminds/squirrel"
 	"github.com/jmoiron/sqlx"
+	"go.uber.org/zap"
 )

 type PlayerBattleState struct {
 	ADDED_PENDING_BATTLE_COLLIDER_ACK   int32
 	READDED_PENDING_BATTLE_COLLIDER_ACK int32
+	READDED_BATTLE_COLLIDER_ACKED       int32
 	ACTIVE                              int32
 	DISCONNECTED                        int32
 	LOST                                int32
@@ -24,39 +27,28 @@ func InitPlayerBattleStateIns() {
 	PlayerBattleStateIns = PlayerBattleState{
 		ADDED_PENDING_BATTLE_COLLIDER_ACK:   0,
 		READDED_PENDING_BATTLE_COLLIDER_ACK: 1,
-		ACTIVE:                              2,
-		DISCONNECTED:                        3,
-		LOST:                                4,
-		EXPELLED_DURING_GAME:                5,
-		EXPELLED_IN_DISMISSAL:               6,
+		READDED_BATTLE_COLLIDER_ACKED:       2,
+		ACTIVE:                              3,
+		DISCONNECTED:                        4,
+		LOST:                                5,
+		EXPELLED_DURING_GAME:                6,
+		EXPELLED_IN_DISMISSAL:               7,
 	}
 }

 type Player struct {
-	Id                int32      `json:"id,omitempty" db:"id"`
-	X                 float64    `json:"x,omitempty"`
-	Y                 float64    `json:"y,omitempty"`
-	Dir               *Direction `json:"dir,omitempty"`
-	Speed             float64    `json:"speed,omitempty"`
-	BattleState       int32      `json:"battleState,omitempty"`
-	LastMoveGmtMillis int32      `json:"lastMoveGmtMillis,omitempty"`
-	Score             int32      `json:"score,omitempty"`
-	Removed           bool       `json:"removed,omitempty"`
-	JoinIndex         int32
+	PlayerDownsync

-	Name        string `json:"name,omitempty" db:"name"`
-	DisplayName string `json:"displayName,omitempty" db:"display_name"`
-	Avatar      string `json:"avatar,omitempty"`
+	// DB only fields
+	CreatedAt     int64     `db:"created_at"`
+	UpdatedAt     int64     `db:"updated_at"`
+	DeletedAt     NullInt64 `db:"deleted_at"`
+	TutorialStage int       `db:"tutorial_stage"`

-	FrozenAtGmtMillis    int64     `json:"-" db:"-"`
-	AddSpeedAtGmtMillis  int64     `json:"-" db:"-"`
-	CreatedAt            int64     `json:"-" db:"created_at"`
-	UpdatedAt            int64     `json:"-" db:"updated_at"`
-	DeletedAt            NullInt64 `json:"-" db:"deleted_at"`
-	TutorialStage        int       `json:"-" db:"tutorial_stage"`
-	AckingFrameId        int32     `json:"ackingFrameId"`
-	AckingInputFrameId   int32     `json:"-"`
-	LastSentInputFrameId int32     `json:"-"`
+	// other in-battle info fields
+	LastSentInputFrameId int32
+	AckingFrameId        int32
+	AckingInputFrameId   int32
 }

 func ExistPlayerByName(name string) (bool, error) {
@@ -72,15 +64,43 @@ func GetPlayerById(id int) (*Player, error) {
 }

 func getPlayer(cond sq.Eq) (*Player, error) {
-	var p Player
-	err := getObj("player", cond, &p)
-	if err == sql.ErrNoRows {
-		return nil, nil
+	p := Player{}
+	pd := PlayerDownsync{}
+	query, args, err := sq.Select("*").From("player").Where(cond).Limit(1).ToSql()
+	if err != nil {
+		return nil, err
 	}
-	p.Dir = &Direction{
-		Dx: 0,
-		Dy: 0,
+	rows, err := storage.MySQLManagerIns.Queryx(query, args...)
+	if err != nil {
+		return nil, err
 	}
+	cols, err := rows.Columns()
+	if nil != err {
+		panic(err)
+	}
+	for rows.Next() {
+		// TODO: Do it more elegantly, but by now I don't have time to learn reflection of Golang
+		vals := rowValues(rows, cols)
+		for i, col := range cols {
+			val := *vals[i].(*interface{})
+			if "id" == col {
+				pd.Id = int32(val.(int64))
+			}
+			if "name" == col {
+				switch v := val.(type) {
+				case []byte:
+					pd.Name = string(v)
+				default:
+					pd.Name = fmt.Sprintf("%v", v)
+				}
+			}
+			if "created_at" == col {
+				p.CreatedAt = int64(val.(int64))
+			}
+		}
+		Logger.Debug("Queried player from db", zap.Any("cond", cond), zap.Any("p", p), zap.Any("pd", pd), zap.Any("cols", cols), zap.Any("rowValues", vals))
+	}
+	p.PlayerDownsync = pd
 	return &p, nil
 }

@@ -111,8 +131,6 @@ func Update(tx *sqlx.Tx, id int32, p *Player) (bool, error) {
 	}
 	result, err := tx.Exec(query, args...)
 	if err != nil {
-		fmt.Println("ERRRRRRR:  ")
-		fmt.Println(err)
 		return false, err
 	}
 	rowsAffected, err := result.RowsAffected()
--- a/battle_srv/models/player_dao_helper.go
+++ b/battle_srv/models/player_dao_helper.go
@@ -1,15 +1,26 @@
 package models

 import (
+	"battle_srv/storage"
 	"database/sql"
 	. "dnmshared"
-	"server/storage"

 	sq "github.com/Masterminds/squirrel"
 	"github.com/jmoiron/sqlx"
 	"go.uber.org/zap"
 )

+func rowValues(rows *sqlx.Rows, cols []string) []interface{} {
+	results := make([]interface{}, len(cols))
+	for i := range results {
+		results[i] = new(interface{})
+	}
+	if err := rows.Scan(results[:]...); err != nil {
+		panic(err)
+	}
+	return results
+}
+
 func exist(t string, cond sq.Eq) (bool, error) {
 	c, err := getCount(t, cond)
 	if err != nil {
--- a/battle_srv/models/player_login.go
+++ b/battle_srv/models/player_login.go
@@ -1,10 +1,10 @@
 package models

 import (
+	. "battle_srv/common"
+	"battle_srv/common/utils"
+	"battle_srv/storage"
 	"database/sql"
-	. "server/common"
-	"server/common/utils"
-	"server/storage"

 	sq "github.com/Masterminds/squirrel"
 )
--- a/battle_srv/models/player_wallet.go
+++ b/battle_srv/models/player_wallet.go
@@ -1,11 +1,11 @@
 package models

 import (
+	. "battle_srv/common"
+	"battle_srv/common/utils"
 	"database/sql"
 	. "dnmshared"
 	"errors"
-	. "server/common"
-	"server/common/utils"

 	sq "github.com/Masterminds/squirrel"
 	"github.com/jmoiron/sqlx"
--- a/battle_srv/models/ringbuf.go
+++ b/battle_srv/models/ringbuf.go
@@ -21,6 +21,10 @@ func NewRingBuffer(n int32) *RingBuffer {
 }

 func (rb *RingBuffer) Put(pItem interface{}) {
+	for 0 < rb.Cnt && rb.Cnt >= rb.N {
+		// Make room for the new element
+		rb.Pop()
+	}
 	rb.Eles[rb.Ed] = pItem
 	rb.EdFrameId++
 	rb.Cnt++
@@ -69,5 +73,8 @@ func (rb *RingBuffer) GetByOffset(offsetFromSt int32) interface{} {
 }

 func (rb *RingBuffer) GetByFrameId(frameId int32) interface{} {
+	if frameId >= rb.EdFrameId || frameId < rb.StFrameId {
+		return nil
+	}
 	return rb.GetByOffset(frameId - rb.StFrameId)
 }
--- a/battle_srv/models/room.go
+++ b/battle_srv/models/room.go
--- a/battle_srv/models/room_heap_manager.go
+++ b/battle_srv/models/room_heap_manager.go
@@ -5,6 +5,7 @@ import (
 	. "dnmshared"
 	"fmt"
 	"go.uber.org/zap"
+	"strings"
 	"sync"
 )

@@ -21,11 +22,13 @@ var (

 func (pPq *RoomHeap) PrintInOrder() {
 	pq := *pPq
-	fmt.Printf("The RoomHeap instance now contains:\n")
+	s := make([]string, 0)
+	s = append(s, fmt.Sprintf("The RoomHeap instance now contains:"))
 	for i := 0; i < len(pq); i++ {
-		fmt.Printf("{index: %d, roomID: %d, score: %.2f} ", i, pq[i].Id, pq[i].Score)
+		s = append(s, fmt.Sprintf("{index: %d, roomID: %d, score: %.2f} ", i, pq[i].Id, pq[i].Score))
 	}
-	fmt.Printf("\n")
+
+	Logger.Debug(strings.Join(s, "\n"))
 }

 func (pq RoomHeap) Len() int { return len(pq) }
--- a/battle_srv/pb_output/room_downsync_frame.pb.go
+++ b/battle_srv/pb_output/room_downsync_frame.pb.go
--- a/battle_srv/protos/room_downsync_frame.pb.go
+++ b/battle_srv/protos/room_downsync_frame.pb.go
--- a/battle_srv/start_daemon.sh
+++ b/battle_srv/start_daemon.sh
@@ -7,6 +7,7 @@ fi

 basedir=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )

+PROJECTNAME=server.exe
 OS_USER=$USER
 ServerEnv=$1
 LOG_PATH="/var/log/treasure-hunter.log"
@@ -17,5 +18,5 @@ PID_FILE="$basedir/treasure-hunter.pid"
 sudo su - root -c "touch $LOG_PATH" 
 sudo su - root -c "chown $OS_USER:$OS_USER $LOG_PATH" 

-ServerEnv=$ServerEnv $basedir/server >$LOG_PATH 2>&1 &
+ServerEnv=$ServerEnv $basedir/$PROJECTNAME >$LOG_PATH 2>&1 &
 echo $! > $PID_FILE
--- a/battle_srv/storage/mysql_manager.go
+++ b/battle_srv/storage/mysql_manager.go
@@ -1,7 +1,7 @@
 package storage

 import (
-	. "server/common"
+	. "battle_srv/common"

 	_ "github.com/go-sql-driver/mysql"
 	"github.com/jmoiron/sqlx"
--- a/battle_srv/storage/redis_manager.go
+++ b/battle_srv/storage/redis_manager.go
@@ -1,8 +1,8 @@
 package storage

 import (
+	. "battle_srv/common"
 	"fmt"
-	. "server/common"

 	"github.com/go-redis/redis"
 	_ "github.com/go-sql-driver/mysql"
--- a/battle_srv/ws/serve.go
+++ b/battle_srv/ws/serve.go
@@ -1,6 +1,9 @@
 package ws

 import (
+	. "battle_srv/common"
+	"battle_srv/models"
+	pb "battle_srv/protos"
 	"container/heap"
 	"fmt"
 	"github.com/gin-gonic/gin"
@@ -8,9 +11,6 @@ import (
 	"github.com/gorilla/websocket"
 	"go.uber.org/zap"
 	"net/http"
-	. "server/common"
-	"server/models"
-	pb "server/pb_output"
 	"strconv"
 	"sync/atomic"
 	"time"
@@ -46,9 +46,8 @@ func Serve(c *gin.Context) {
 		c.AbortWithStatus(http.StatusBadRequest)
 		return
 	}
-	Logger.Info("Finding PlayerLogin record for ws authentication:", zap.Any("intAuthToken", token))
 	boundRoomId := 0
-	expectRoomId := 0
+	expectedRoomId := 0
 	var err error
 	if boundRoomIdStr, hasBoundRoomId := c.GetQuery("boundRoomId"); hasBoundRoomId {
 		boundRoomId, err = strconv.Atoi(boundRoomIdStr)
@@ -57,27 +56,28 @@ func Serve(c *gin.Context) {
 			c.AbortWithStatus(http.StatusBadRequest)
 			return
 		}
-		Logger.Info("Finding PlayerLogin record for ws authentication:", zap.Any("intAuthToken", token), zap.Any("boundRoomId", boundRoomId))
-	}
-	if expectRoomIdStr, hasExpectRoomId := c.GetQuery("expectedRoomId"); hasExpectRoomId {
-		expectRoomId, err = strconv.Atoi(expectRoomIdStr)
+		Logger.Debug("Finding PlayerLogin record for ws authentication:", zap.Any("intAuthToken", token), zap.Any("boundRoomId", boundRoomId))
+	} else if expectedRoomIdStr, hasExpectRoomId := c.GetQuery("expectedRoomId"); hasExpectRoomId {
+		expectedRoomId, err = strconv.Atoi(expectedRoomIdStr)
 		if err != nil {
 			c.AbortWithStatus(http.StatusBadRequest)
 			return
 		}
-		Logger.Info("Finding PlayerLogin record for ws authentication:", zap.Any("intAuthToken", token), zap.Any("expectedRoomId", expectRoomId))
+		Logger.Debug("Finding PlayerLogin record for ws authentication:", zap.Any("intAuthToken", token), zap.Any("expectedRoomId", expectedRoomId))
+	} else {
+		Logger.Debug("Finding PlayerLogin record for ws authentication:", zap.Any("intAuthToken", token))
 	}

 	// TODO: Wrap the following 2 stmts by sql transaction!
 	playerId, err := models.GetPlayerIdByToken(token)
 	if err != nil || playerId == 0 {
 		// TODO: Abort with specific message.
-		Logger.Info("PlayerLogin record not found for ws authentication:", zap.Any("intAuthToken", token))
+		Logger.Warn("PlayerLogin record not found for ws authentication:", zap.Any("intAuthToken", token))
 		c.AbortWithStatus(http.StatusBadRequest)
 		return
 	}

-	Logger.Info("PlayerLogin record has been found for ws authentication:", zap.Any("playerId", playerId))
+	Logger.Info("PlayerLogin record has been found for ws authentication:", zap.Any("playerId", playerId), zap.Any("intAuthToken", token), zap.Any("boundRoomId", boundRoomId), zap.Any("expectedRoomId", expectedRoomId))

 	conn, err := upgrader.Upgrade(c.Writer, c.Request, nil)
 	if err != nil {
@@ -104,7 +104,7 @@ func Serve(c *gin.Context) {
 		}
 		defer func() {
 			if r := recover(); r != nil {
-				Logger.Warn("Recovered from: ", zap.Any("panic", r))
+				Logger.Error("Recovered from: ", zap.Any("panic", r))
 			}
 		}()
 		/**
@@ -159,14 +159,14 @@ func Serve(c *gin.Context) {
 		signalToCloseConnOfThisPlayer(Constants.RetCode.PlayerNotFound, "")
 	}

-	Logger.Info("Player has logged in and its profile is found from persistent storage:", zap.Any("playerId", playerId), zap.Any("play", pPlayer))
+	Logger.Debug("Player has logged in and its profile is found from persistent storage:", zap.Any("playerId", playerId), zap.Any("player", pPlayer))

 	// Find a room to join.
-	Logger.Info("About to acquire RoomHeapMux for player:", zap.Any("playerId", playerId))
+	Logger.Debug("About to acquire RoomHeapMux for player:", zap.Any("playerId", playerId))
 	(*(models.RoomHeapMux)).Lock()
 	defer func() {
 		(*(models.RoomHeapMux)).Unlock()
-		Logger.Info("Released RoomHeapMux for player:", zap.Any("playerId", playerId))
+		Logger.Debug("Released RoomHeapMux for player:", zap.Any("playerId", playerId))
 	}()
 	defer func() {
 		if r := recover(); r != nil {
@@ -174,13 +174,12 @@ func Serve(c *gin.Context) {
 			signalToCloseConnOfThisPlayer(Constants.RetCode.UnknownError, "")
 		}
 	}()
-	Logger.Info("Acquired RoomHeapMux for player:", zap.Any("playerId", playerId))
+	Logger.Debug("Acquired RoomHeapMux for player:", zap.Any("playerId", playerId))
 	// Logger.Info("The RoomHeapManagerIns has:", zap.Any("addr", fmt.Sprintf("%p", models.RoomHeapManagerIns)), zap.Any("size", len(*(models.RoomHeapManagerIns))))
 	playerSuccessfullyAddedToRoom := false
 	if 0 < boundRoomId {
 		if tmpPRoom, existent := (*models.RoomMapManagerIns)[int32(boundRoomId)]; existent {
 			pRoom = tmpPRoom
-			Logger.Info("Successfully got:\n", zap.Any("roomId", pRoom.Id), zap.Any("playerId", playerId), zap.Any("forBoundRoomId", boundRoomId))
 			res := pRoom.ReAddPlayerIfPossible(pPlayer, conn, signalToCloseConnOfThisPlayer)
 			if !res {
 				Logger.Warn("Failed to get:\n", zap.Any("roomId", pRoom.Id), zap.Any("playerId", playerId), zap.Any("forBoundRoomId", boundRoomId))
@@ -188,19 +187,16 @@ func Serve(c *gin.Context) {
 				playerSuccessfullyAddedToRoom = true
 			}
 		}
-	}
-
-	if 0 < expectRoomId {
-		if tmpRoom, existent := (*models.RoomMapManagerIns)[int32(expectRoomId)]; existent {
+	} else if 0 < expectedRoomId {
+		if tmpRoom, existent := (*models.RoomMapManagerIns)[int32(expectedRoomId)]; existent {
 			pRoom = tmpRoom
-			Logger.Info("Successfully got:\n", zap.Any("roomId", pRoom.Id), zap.Any("playerId", playerId), zap.Any("forExpectedRoomId", expectRoomId))

 			if pRoom.ReAddPlayerIfPossible(pPlayer, conn, signalToCloseConnOfThisPlayer) {
 				playerSuccessfullyAddedToRoom = true
 			} else if pRoom.AddPlayerIfPossible(pPlayer, conn, signalToCloseConnOfThisPlayer) {
 				playerSuccessfullyAddedToRoom = true
 			} else {
-				Logger.Warn("Failed to get:\n", zap.Any("roomId", pRoom.Id), zap.Any("playerId", playerId), zap.Any("forExpectedRoomId", expectRoomId))
+				Logger.Warn("Failed to get:\n", zap.Any("roomId", pRoom.Id), zap.Any("playerId", playerId), zap.Any("forExpectedRoomId", expectedRoomId))
 				playerSuccessfullyAddedToRoom = false
 			}

@@ -220,7 +216,7 @@ func Serve(c *gin.Context) {
 			signalToCloseConnOfThisPlayer(Constants.RetCode.LocallyNoAvailableRoom, fmt.Sprintf("Cannot pop a (*Room) for playerId == %v!", playerId))
 		} else {
 			pRoom = tmpRoom
-			Logger.Info("Successfully popped:\n", zap.Any("roomId", pRoom.Id), zap.Any("playerId", playerId))
+			Logger.Info("Successfully popped:\n", zap.Any("roomId", pRoom.Id), zap.Any("forPlayerId", playerId))
 			res := pRoom.AddPlayerIfPossible(pPlayer, conn, signalToCloseConnOfThisPlayer)
 			if !res {
 				signalToCloseConnOfThisPlayer(Constants.RetCode.PlayerNotAddableToRoom, fmt.Sprintf("AddPlayerIfPossible returns false for roomId == %v, playerId == %v!", pRoom.Id, playerId))
@@ -246,8 +242,8 @@ func Serve(c *gin.Context) {
 		bciFrame := &pb.BattleColliderInfo{
 			BoundRoomId:           pRoom.Id,
 			StageName:             pRoom.StageName,
-			StrToVec2DListMap:     models.ToPbVec2DListMap(pRoom.RawBattleStrToVec2DListMap),
-			StrToPolygon2DListMap: models.ToPbPolygon2DListMap(pRoom.RawBattleStrToPolygon2DListMap),
+			StrToVec2DListMap:     pRoom.StrToVec2DListMap,
+			StrToPolygon2DListMap: pRoom.StrToPolygon2DListMap,
 			StageDiscreteW:        pRoom.StageDiscreteW,
 			StageDiscreteH:        pRoom.StageDiscreteH,
 			StageTileW:            pRoom.StageTileW,
@@ -263,9 +259,20 @@ func Serve(c *gin.Context) {
 			InputFrameUpsyncDelayTolerance:  pRoom.InputFrameUpsyncDelayTolerance,
 			MaxChasingRenderFramesPerUpdate: pRoom.MaxChasingRenderFramesPerUpdate,
 			PlayerBattleState:               pThePlayer.BattleState, // For frontend to know whether it's rejoining
-			RollbackEstimatedDt:             pRoom.RollbackEstimatedDt,
 			RollbackEstimatedDtMillis:       pRoom.RollbackEstimatedDtMillis,
 			RollbackEstimatedDtNanos:        pRoom.RollbackEstimatedDtNanos,
+
+			WorldToVirtualGridRatio: pRoom.WorldToVirtualGridRatio,
+			VirtualGridToWorldRatio: pRoom.VirtualGridToWorldRatio,
+
+			SpAtkLookupFrames:         pRoom.SpAtkLookupFrames,
+			RenderCacheSize:           pRoom.RenderCacheSize,
+			MeleeSkillConfig:          pRoom.MeleeSkillConfig,
+			SnapIntoPlatformOverlap:   pRoom.SnapIntoPlatformOverlap,
+			SnapIntoPlatformThreshold: pRoom.SnapIntoPlatformThreshold,
+			JumpingInitVelY:           pRoom.JumpingInitVelY,
+			GravityX:                  pRoom.GravityX,
+			GravityY:                  pRoom.GravityY,
 		}

 		resp := &pb.WsResp{
@@ -354,7 +361,7 @@ func Serve(c *gin.Context) {
 	receivingLoopAgainstPlayer := func() error {
 		defer func() {
 			if r := recover(); r != nil {
-				Logger.Warn("Goroutine `receivingLoopAgainstPlayer`, recovery spot#1, recovered from: ", zap.Any("panic", r))
+				Logger.Error("Goroutine `receivingLoopAgainstPlayer`, recovery spot#1, recovered from: ", zap.Any("panic", r))
 			}
 			Logger.Info("Goroutine `receivingLoopAgainstPlayer` is stopped for:", zap.Any("playerId", playerId), zap.Any("roomId", pRoom.Id))
 		}()
@@ -363,7 +370,7 @@ func Serve(c *gin.Context) {
 				return nil
 			}

-			// Tries to receive from client-side in a non-blocking manner.
+			// TODO: Is there any potential edge-trigger improvement like the epoll approach mentioned above for the following statement? See discussion in https://github.com/gorilla/websocket/issues/122
 			_, bytes, err := conn.ReadMessage()
 			if nil != err {
 				Logger.Error("About to `signalToCloseConnOfThisPlayer`", zap.Any("roomId", pRoom.Id), zap.Any("playerId", playerId), zap.Error(err))
--- a/charts/AttackTriggerCases.jpg
+++ b/charts/AttackTriggerCases.jpg
--- a/charts/AvoidingFloatingPointAccumulationErr.jpg
+++ b/charts/AvoidingFloatingPointAccumulationErr.jpg
--- a/charts/DelayNoMore.drawio
+++ b/charts/DelayNoMore.drawio
--- a/charts/InputDelayIntro.jpg
+++ b/charts/InputDelayIntro.jpg
--- a/charts/README.md
+++ b/charts/README.md
@@ -0,0 +1,16 @@
+# Double playback speed of a video
+```
+ffmpeg -i input.mp4 -filter:v "setpts=0.5*PTS" output.mp4
+```
+
+# GIF creation cmd reference
+```
+ffmpeg -ss 12 -t 13 -i input.mp4 -vf "fps=10,scale=480:-1" -loop 0 output.gif
+```
+
+# Extract GIF (with alpha channel, e.g. exported from Fighter Factory Studio) to PNG sequence
+```
+ffmpeg -vsync vfr -i input.gif output%d.png
+```
+
+The `-vsync vfr` tells ffmpeg to disrespect the original delays set within the GIF file, otherwise many duplicate frame will be extracted by the default 60FPS.
--- a/charts/RollbackAndChase.jpg
+++ b/charts/RollbackAndChase.jpg
--- a/charts/jump_sync_spedup.gif
+++ b/charts/jump_sync_spedup.gif
--- a/charts/screenshot-2.png
+++ b/charts/screenshot-2.png
--- a/collider_visualizer/Makefile
+++ b/collider_visualizer/Makefile
@@ -2,10 +2,11 @@ PROJECTNAME=viscol.exe
 ROOT_DIR=.
 all: help
 ## Available proxies for downloading go modules are listed in "https://github.com/golang/go/wiki/Modules#how-do-i-use-vendoring-with-modules-is-vendoring-going-away". 
-GOPROXY=https://mirrors.aliyun.com/goproxy 
+#GOPROXY=https://mirrors.aliyun.com/goproxy 
+GOPROXY=https://goproxy.io

 build:
-	go build -o $(ROOT_DIR)/$(PROJECTNAME)
+	GOPROXY=$(GOPROXY) go build -o $(ROOT_DIR)/$(PROJECTNAME)

 run: build
 	./$(PROJECTNAME)
--- a/collider_visualizer/go.mod
+++ b/collider_visualizer/go.mod
@@ -3,11 +3,12 @@ module viscol
 go 1.19

 require (
+	dnmshared v0.0.0
+	battle_srv v0.0.0
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0
 	github.com/hajimehoshi/ebiten/v2 v2.4.7
 	github.com/solarlune/resolv v0.5.1
 	golang.org/x/image v0.0.0-20220902085622-e7cb96979f69
-	dnmshared v0.0.0
 )

 require (
@@ -22,6 +23,8 @@ require (
 	golang.org/x/exp v0.0.0-20190731235908-ec7cb31e5a56 // indirect
 	golang.org/x/mobile v0.0.0-20220722155234-aaac322e2105 // indirect
 	golang.org/x/sys v0.0.0-20220818161305-2296e01440c6 // indirect
+	google.golang.org/protobuf v1.28.1 // indirect
 )

 replace dnmshared => ../dnmshared
+replace battle_srv => ../battle_srv
--- a/collider_visualizer/go.sum
+++ b/collider_visualizer/go.sum
@@ -7,6 +7,8 @@ github.com/go-gl/glfw/v3.3/glfw v0.0.0-20220806181222-55e207c401ad h1:kX51IjbsJP
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20220806181222-55e207c401ad/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 h1:DACJavvAHhabrF08vX0COfcOBJRhZ8lUbR+ZWIs0Y5g=
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k=
+github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/hajimehoshi/bitmapfont/v2 v2.2.1 h1:y7zcy02/UgO24IL3COqYtrRZzhRucNBtmCo/SNU648k=
 github.com/hajimehoshi/bitmapfont/v2 v2.2.1/go.mod h1:wjrYAy8vKgj9JsFgnYAOK346/uvE22TlmqouzdnYIs0=
 github.com/hajimehoshi/ebiten/v2 v2.4.7 h1:XuvB7R0Rbw/O7g6vNU8gqr5b9e7MNhhAONMSsyreLDI=
@@ -93,4 +95,8 @@ golang.org/x/tools v0.1.8-0.20211022200916-316ba0b74098/go.mod h1:LGqMHiF4EqQNHR
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+google.golang.org/protobuf v1.28.1 h1:d0NfwRgPtno5B1Wa6L2DAG+KivqkdutMf1UhdNx175w=
+google.golang.org/protobuf v1.28.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
--- a/collider_visualizer/main.go
+++ b/collider_visualizer/main.go
@@ -85,8 +85,9 @@ type Game struct {

 func NewGame() *Game {

-	stageName := "simple" // Use this for calibration
+	// stageName := "simple" // Use this for calibration in isometric orientation
 	// stageName := "richsoil"
+	stageName := "dungeon"
 	stageDiscreteW, stageDiscreteH, stageTileW, stageTileH, playerPosMap, barrierMap, err := parseStage(stageName)
 	if nil != err {
 		panic(err)
--- a/collider_visualizer/worldColliderDisplay.go
+++ b/collider_visualizer/worldColliderDisplay.go
@@ -1,7 +1,9 @@
 package main

 import (
+	. "battle_srv/protos"
 	. "dnmshared"
+	. "dnmshared/sharedprotos"
 	"fmt"
 	"github.com/hajimehoshi/ebiten/v2"
 	"github.com/solarlune/resolv"
@@ -19,7 +21,7 @@ func (world *WorldColliderDisplay) Init() {

 func NewWorldColliderDisplay(game *Game, stageDiscreteW, stageDiscreteH, stageTileW, stageTileH int32, playerPosMap StrToVec2DListMap, barrierMap StrToPolygon2DListMap) *WorldColliderDisplay {

-	playerList := *(playerPosMap["PlayerStartingPos"])
+	playerPosList := *(playerPosMap["PlayerStartingPos"])
 	barrierList := *(barrierMap["Barrier"])

 	world := &WorldColliderDisplay{Game: game}
@@ -32,20 +34,27 @@ func NewWorldColliderDisplay(game *Game, stageDiscreteW, stageDiscreteH, stageTi
 	spaceOffsetX := float64(spaceW) * 0.5
 	spaceOffsetY := float64(spaceH) * 0.5

-	playerColliderRadius := float64(32)
-	playerColliders := make([]*resolv.Object, len(playerList))
-	space := resolv.NewSpace(int(spaceW), int(spaceH), 16, 16)
-	for i, player := range playerList {
-		playerCollider := GenerateRectCollider(player.X, player.Y, playerColliderRadius*2, playerColliderRadius*2, spaceOffsetX, spaceOffsetY, "Player") // [WARNING] Deliberately not using a circle because "resolv v0.5.1" doesn't yet align circle center with space cell center, regardless of the "specified within-object offset"
-		Logger.Info(fmt.Sprintf("Player Collider#%d: player.X=%v, player.Y=%v, radius=%v, spaceOffsetX=%v, spaceOffsetY=%v, shape=%v; calibrationCheckX=player.X-radius+spaceOffsetX=%v", i, player.X, player.Y, playerColliderRadius, spaceOffsetX, spaceOffsetY, playerCollider.Shape, player.X-playerColliderRadius+spaceOffsetX))
+	worldToVirtualGridRatio := float64(1000)
+	virtualGridToWorldRatio := float64(1) / worldToVirtualGridRatio
+	playerDefaultSpeed := 1 * worldToVirtualGridRatio
+	minStep := (int(float64(playerDefaultSpeed)*virtualGridToWorldRatio) << 3)
+	playerColliderRadius := float64(12)
+	playerColliders := make([]*resolv.Object, len(playerPosList.Eles))
+	snapIntoPlatformOverlap := float64(0.1)
+	space := resolv.NewSpace(int(spaceW), int(spaceH), minStep, minStep)
+	topPadding, bottomPadding, leftPadding, rightPadding := snapIntoPlatformOverlap, snapIntoPlatformOverlap, snapIntoPlatformOverlap, snapIntoPlatformOverlap
+	for i, playerPos := range playerPosList.Eles {
+		colliderWidth, colliderHeight := playerColliderRadius*2, playerColliderRadius*4
+		playerCollider := GenerateRectCollider(playerPos.X, playerPos.Y, colliderWidth, colliderHeight, topPadding, bottomPadding, leftPadding, rightPadding, spaceOffsetX, spaceOffsetY, "Player") // [WARNING] Deliberately not using a circle because "resolv v0.5.1" doesn't yet align circle center with space cell center, regardless of the "specified within-object offset"
+		Logger.Info(fmt.Sprintf("Player Collider#%d: player world pos=(%.2f, %.2f), shape=%v", i, playerPos.X, playerPos.Y, ConvexPolygonStr(playerCollider.Shape.(*resolv.ConvexPolygon))))
 		playerColliders[i] = playerCollider
 		space.Add(playerCollider)
 	}

 	barrierLocalId := 0
-	for _, barrierUnaligned := range barrierList {
+	for _, barrierUnaligned := range barrierList.Eles {
 		barrierCollider := GenerateConvexPolygonCollider(barrierUnaligned, spaceOffsetX, spaceOffsetY, "Barrier")
-		Logger.Info(fmt.Sprintf("Added barrier: shape=%v", barrierCollider.Shape))
+		Logger.Debug(fmt.Sprintf("Added barrier: shape=%v", ConvexPolygonStr(barrierCollider.Shape.(*resolv.ConvexPolygon))))
 		space.Add(barrierCollider)
 		barrierLocalId++
 	}
@@ -54,24 +63,101 @@ func NewWorldColliderDisplay(game *Game, stageDiscreteW, stageDiscreteH, stageTi

 	moveToCollide := true
 	if moveToCollide {
+		effPushback := Vec2D{X: float64(0), Y: float64(0)}
 		toTestPlayerCollider := playerColliders[0]
-		oldDx, oldDy := -2.98, -50.0
-		dx, dy := oldDx, oldDy
-		if collision := toTestPlayerCollider.Check(oldDx, oldDy, "Barrier"); collision != nil {
+		//colliderWidth, colliderHeight := playerColliderRadius*2, playerColliderRadius*4
+		//newVx, newVy := int32(27999), int32(-420270)
+		//toTestPlayerCollider.X, toTestPlayerCollider.Y = VirtualGridToPolygonColliderBLPos(newVx, newVy, colliderWidth, colliderHeight, topPadding, bottomPadding, leftPadding, rightPadding, spaceOffsetX, spaceOffsetY, virtualGridToWorldRatio)
+
+		Logger.Info(fmt.Sprintf("Checking collision for playerShape=%v", ConvexPolygonStr(toTestPlayerCollider.Shape.(*resolv.ConvexPolygon))))
+
+		toTestPlayerCollider.Update()
+		if collision := toTestPlayerCollider.Check(0, 0); collision != nil {
 			playerShape := toTestPlayerCollider.Shape.(*resolv.ConvexPolygon)
-			barrierShape := collision.Objects[0].Shape.(*resolv.ConvexPolygon)
-			if overlapped, pushbackX, pushbackY := CalcPushbacks(oldDx, oldDy, playerShape, barrierShape); overlapped {
-				Logger.Info(fmt.Sprintf("Collided & overlapped: player.X=%v, player.Y=%v, oldDx=%v, oldDy=%v, playerShape=%v, toCheckBarrier=%v, pushbackX=%v, pushbackY=%v", toTestPlayerCollider.X, toTestPlayerCollider.Y, oldDx, oldDy, ConvexPolygonStr(playerShape), ConvexPolygonStr(barrierShape), pushbackX, pushbackY))
-				dx -= pushbackX
-				dy -= pushbackY
-			} else {
-				Logger.Info(fmt.Sprintf("Collider BUT not overlapped: player.X=%v, player.Y=%v, oldDx=%v, oldDy=%v, playerShape=%v, toCheckBarrier=%v", toTestPlayerCollider.X, toTestPlayerCollider.Y, oldDx, oldDy, ConvexPolygonStr(playerShape), ConvexPolygonStr(barrierShape)))
+			for _, obj := range collision.Objects {
+				bShape := obj.Shape.(*resolv.ConvexPolygon)
+				Logger.Warn(fmt.Sprintf("Checking potential: a=%v, b=%v", ConvexPolygonStr(playerShape), ConvexPolygonStr(bShape)))
+				if overlapped, pushbackX, pushbackY, overlapResult := CalcPushbacks(0, 0, playerShape, bShape); overlapped {
+					Logger.Warn(fmt.Sprintf("Overlapped: a=%v, b=%v, pushbackX=%v, pushbackY=%v", ConvexPolygonStr(playerShape), ConvexPolygonStr(bShape), pushbackX, pushbackY))
+					effPushback.X += pushbackX
+					effPushback.Y += pushbackY
+				} else {
+					Logger.Warn(fmt.Sprintf("Collided BUT not overlapped: a=%v, b=%v, overlapResult=%v", ConvexPolygonStr(playerShape), ConvexPolygonStr(bShape), overlapResult))
+				}
+			}
+			toTestPlayerCollider.X -= effPushback.X
+			toTestPlayerCollider.Y -= effPushback.Y
+			toTestPlayerCollider.Update()
+			Logger.Info(fmt.Sprintf("effPushback={%v, %v}", effPushback.X, effPushback.Y))
+		}
+	}
+	meleeBullet := &MeleeBullet{
+		// for offender
+		StartupFrames:         int32(18),
+		ActiveFrames:          int32(1),
+		RecoveryFrames:        int32(61),
+		RecoveryFramesOnBlock: int32(61),
+		RecoveryFramesOnHit:   int32(61),
+		Moveforward: &Vec2D{
+			X: 0,
+			Y: 0,
+		},
+		HitboxOffset: float64(24.0),
+		HitboxSize: &Vec2D{
+			X: float64(45.0),
+			Y: float64(32.0),
+		},
+
+		// for defender
+		HitStunFrames:      int32(18),
+		BlockStunFrames:    int32(9),
+		Pushback:           float64(22.0),
+		ReleaseTriggerType: int32(1), // 1: rising-edge, 2: falling-edge
+		Damage:             int32(5),
+	}
+	bulletLeftToRight := false
+	if bulletLeftToRight {
+		xfac := float64(1.0)
+		offenderWx, offenderWy := playerPosList.Eles[0].X, playerPosList.Eles[0].Y
+		bulletWx, bulletWy := offenderWx+xfac*meleeBullet.HitboxOffset, offenderWy
+		newBulletCollider := GenerateRectCollider(bulletWx, bulletWy, meleeBullet.HitboxSize.X, meleeBullet.HitboxSize.Y, topPadding, bottomPadding, leftPadding, rightPadding, spaceOffsetX, spaceOffsetY, "MeleeBullet")
+		space.Add(newBulletCollider)
+		bulletShape := newBulletCollider.Shape.(*resolv.ConvexPolygon)
+		Logger.Warn(fmt.Sprintf("bullet ->: Added bullet collider to space: a=%v", ConvexPolygonStr(bulletShape)))
+
+		if collision := newBulletCollider.Check(0, 0); collision != nil {
+			for _, obj := range collision.Objects {
+				objShape := obj.Shape.(*resolv.ConvexPolygon)
+				if overlapped, pushbackX, pushbackY, overlapResult := CalcPushbacks(0, 0, bulletShape, objShape); overlapped {
+					Logger.Warn(fmt.Sprintf("bullet ->: Overlapped: a=%v, b=%v, pushbackX=%v, pushbackY=%v", ConvexPolygonStr(bulletShape), ConvexPolygonStr(objShape), pushbackX, pushbackY))
+				} else {
+					Logger.Warn(fmt.Sprintf("bullet ->: Collided BUT not overlapped: a=%v, b=%v, overlapResult=%v", ConvexPolygonStr(bulletShape), ConvexPolygonStr(objShape), overlapResult))
+				}
 			}
 		}
+	}

-		toTestPlayerCollider.X += dx
-		toTestPlayerCollider.Y += dy
-		toTestPlayerCollider.Update()
+	bulletRightToLeft := false
+	if bulletRightToLeft {
+		xfac := float64(-1.0)
+		offenderWx, offenderWy := playerPosList.Eles[1].X, playerPosList.Eles[1].Y
+		bulletWx, bulletWy := offenderWx+xfac*meleeBullet.HitboxOffset, offenderWy
+
+		newBulletCollider := GenerateRectCollider(bulletWx, bulletWy, meleeBullet.HitboxSize.X, meleeBullet.HitboxSize.Y, topPadding, bottomPadding, leftPadding, rightPadding, spaceOffsetX, spaceOffsetY, "MeleeBullet")
+		space.Add(newBulletCollider)
+		bulletShape := newBulletCollider.Shape.(*resolv.ConvexPolygon)
+		Logger.Warn(fmt.Sprintf("bullet <-: Added bullet collider to space: a=%v", ConvexPolygonStr(bulletShape)))
+
+		if collision := newBulletCollider.Check(0, 0); collision != nil {
+			for _, obj := range collision.Objects {
+				objShape := obj.Shape.(*resolv.ConvexPolygon)
+				if overlapped, pushbackX, pushbackY, overlapResult := CalcPushbacks(0, 0, bulletShape, objShape); overlapped {
+					Logger.Warn(fmt.Sprintf("bullet <-: Overlapped: a=%v, b=%v, pushbackX=%v, pushbackY=%v", ConvexPolygonStr(bulletShape), ConvexPolygonStr(objShape), pushbackX, pushbackY))
+				} else {
+					Logger.Warn(fmt.Sprintf("bullet <-: Collided BUT not overlapped: a=%v, b=%v, overlapResult=%v", ConvexPolygonStr(bulletShape), ConvexPolygonStr(objShape), overlapResult))
+				}
+			}
+		}
 	}

 	return world
@@ -87,13 +173,16 @@ func (world *WorldColliderDisplay) Draw(screen *ebiten.Image) {
 		if o.HasTags("Player") {
 			drawColor := color.RGBA{0, 255, 0, 255}
 			DrawPolygon(screen, o.Shape.(*resolv.ConvexPolygon), drawColor)
+		} else if o.HasTags("MeleeBullet") {
+			drawColor := color.RGBA{0, 0, 255, 255}
+			DrawPolygon(screen, o.Shape.(*resolv.ConvexPolygon), drawColor)
 		} else {
 			drawColor := color.RGBA{60, 60, 60, 255}
 			DrawPolygon(screen, o.Shape.(*resolv.ConvexPolygon), drawColor)
 		}
 	}

-	world.Game.DebugDraw(screen, world.Space)
+	//world.Game.DebugDraw(screen, world.Space)

 	if world.Game.ShowHelpText {

--- a/dnmshared/geometry.go
+++ b/dnmshared/geometry.go
@@ -1,47 +1,46 @@
 package dnmshared

 import (
+	. "dnmshared/sharedprotos"
 	"math"
 )

-// Use type `float64` for json unmarshalling of numbers.
-type Direction struct {
-	Dx int32 `json:"dx,omitempty"`
-	Dy int32 `json:"dy,omitempty"`
-}
-
-type Vec2D struct {
-	X float64 `json:"x,omitempty"`
-	Y float64 `json:"y,omitempty"`
-}
-
 func NormVec2D(dx, dy float64) Vec2D {
-	return Vec2D{dy, -dx}
+	return Vec2D{X: dy, Y: -dx}
 }

-type Polygon2D struct {
-	Anchor *Vec2D   `json:"-"` // This "Polygon2D.Anchor" is used to be assigned to "B2BodyDef.Position", which in turn is used as the position of the FIRST POINT of the polygon.
-	Points []*Vec2D `json:"-"`
+func AlignPolygon2DToBoundingBox(input *Polygon2D) *Polygon2D {
+	// Transform again to put "anchor" at the "bottom-left point (w.r.t. world space)" of the bounding box for "resolv"
+	boundingBoxBL := &Vec2D{
+		X: math.MaxFloat64,
+		Y: math.MaxFloat64,
+	}
+	for _, p := range input.Points {
+		if p.X < boundingBoxBL.X {
+			boundingBoxBL.X = p.X
+		}
+		if p.Y < boundingBoxBL.Y {
+			boundingBoxBL.Y = p.Y
+		}
+	}

-	/*
-	   When used to represent a "polyline directly drawn in a `Tmx file`", we can initialize both "Anchor" and "Points" simultaneously.
+	// Now "input.Anchor" should move to "input.Anchor+boundingBoxBL", thus "boundingBoxBL" is also the value of the negative diff for all "input.Points"
+	output := &Polygon2D{
+		Anchor: &Vec2D{
+			X: input.Anchor.X + boundingBoxBL.X,
+			Y: input.Anchor.Y + boundingBoxBL.Y,
+		},
+		Points: make([]*Vec2D, len(input.Points)),
+	}

-	   Yet when used to represent a "polyline drawn in a `Tsx file`", we have to first initialize "Points w.r.t. center of the tile-rectangle", and then "Anchor(initially nil) of the tile positioned in the `Tmx file`".
+	for i, p := range input.Points {
+		output.Points[i] = &Vec2D{
+			X: p.X - boundingBoxBL.X,
+			Y: p.Y - boundingBoxBL.Y,
+		}
+	}

-	   Refer to https://shimo.im/docs/SmLJJhXm2C8XMzZT for more information.
-	*/
-
-	/*
-	  [WARNING] Used to cache "`TileWidth & TileHeight` of a Tsx file" only.
-	*/
-	TileWidth  int
-	TileHeight int
-
-	/*
-	  [WARNING] Used to cache "`Width & TileHeight` of an object in Tmx file" only.
-	*/
-	TmxObjectWidth  float64
-	TmxObjectHeight float64
+	return output
 }

 func Distance(pt1 *Vec2D, pt2 *Vec2D) float64 {
--- a/dnmshared/go.mod
+++ b/dnmshared/go.mod
@@ -1,3 +1,3 @@
-module tiled
+module dnmshared 

 go 1.19
--- a/dnmshared/resolv_helper.go
+++ b/dnmshared/resolv_helper.go
@@ -1,6 +1,7 @@
 package dnmshared

 import (
+	. "dnmshared/sharedprotos"
 	"fmt"
 	"github.com/kvartborg/vector"
 	"github.com/solarlune/resolv"
@@ -11,14 +12,23 @@ import (
 func ConvexPolygonStr(body *resolv.ConvexPolygon) string {
 	var s []string = make([]string, len(body.Points))
 	for i, p := range body.Points {
-		s[i] = fmt.Sprintf("[%v, %v]", p[0]+body.X, p[1]+body.Y)
+		s[i] = fmt.Sprintf("[%.2f, %.2f]", p[0]+body.X, p[1]+body.Y)
 	}

-	return fmt.Sprintf("[%s]", strings.Join(s, ", "))
+	return fmt.Sprintf("{\n%s\n}", strings.Join(s, ",\n"))
 }

-func GenerateRectCollider(origX, origY, w, h, spaceOffsetX, spaceOffsetY float64, tag string) *resolv.Object {
-	collider := resolv.NewObject(origX-w*0.5+spaceOffsetX, origY-h*0.5+spaceOffsetY, w, h, tag)
+func RectCenterStr(body *resolv.Object, halfBoundingW, halfBoundingH, topPadding, bottomPadding, leftPadding, rightPadding, spaceOffsetX, spaceOffsetY float64) string {
+	return fmt.Sprintf("{%.2f, %.2f}", body.X+leftPadding+halfBoundingW-spaceOffsetX, body.Y+bottomPadding+halfBoundingH-spaceOffsetY)
+}
+
+func GenerateRectCollider(wx, wy, w, h, topPadding, bottomPadding, leftPadding, rightPadding, spaceOffsetX, spaceOffsetY float64, tag string) *resolv.Object {
+	blX, blY := WorldToPolygonColliderBLPos(wx, wy, w*0.5, h*0.5, topPadding, bottomPadding, leftPadding, rightPadding, spaceOffsetX, spaceOffsetY)
+	return generateRectColliderInCollisionSpace(blX, blY, leftPadding+w+rightPadding, bottomPadding+h+topPadding, tag)
+}
+
+func generateRectColliderInCollisionSpace(blX, blY, w, h float64, tag string) *resolv.Object {
+	collider := resolv.NewObject(blX, blY, w, h, tag) // Unlike its frontend counter part, the position of a "resolv.Object" must be specified by "bottom-left point" because "w" and "h" must be positive, see "resolv.Object.BoundsToSpace" for details
 	shape := resolv.NewRectangle(0, 0, w, h)
 	collider.SetShape(shape)
 	return collider
@@ -54,12 +64,13 @@ func GenerateConvexPolygonCollider(unalignedSrc *Polygon2D, spaceOffsetX, spaceO
 	return collider
 }

-func CalcPushbacks(oldDx, oldDy float64, playerShape, barrierShape *resolv.ConvexPolygon) (bool, float64, float64) {
+func CalcPushbacks(oldDx, oldDy float64, playerShape, barrierShape *resolv.ConvexPolygon) (bool, float64, float64, *SatResult) {
 	origX, origY := playerShape.Position()
 	defer func() {
 		playerShape.SetPosition(origX, origY)
 	}()
 	playerShape.SetPosition(origX+oldDx, origY+oldDy)
+
 	overlapResult := &SatResult{
 		Overlap:       0,
 		OverlapX:      0,
@@ -68,11 +79,11 @@ func CalcPushbacks(oldDx, oldDy float64, playerShape, barrierShape *resolv.Conve
 		BContainedInA: true,
 		Axis:          vector.Vector{0, 0},
 	}
-	if overlapped := IsPolygonPairOverlapped(playerShape, barrierShape, overlapResult); overlapped {
+	if overlapped := isPolygonPairOverlapped(playerShape, barrierShape, overlapResult); overlapped {
 		pushbackX, pushbackY := overlapResult.Overlap*overlapResult.OverlapX, overlapResult.Overlap*overlapResult.OverlapY
-		return true, pushbackX, pushbackY
+		return true, pushbackX, pushbackY, overlapResult
 	} else {
-		return false, 0, 0
+		return false, 0, 0, overlapResult
 	}
 }

@@ -85,16 +96,17 @@ type SatResult struct {
 	Axis          vector.Vector
 }

-func IsPolygonPairOverlapped(a, b *resolv.ConvexPolygon, result *SatResult) bool {
+func isPolygonPairOverlapped(a, b *resolv.ConvexPolygon, result *SatResult) bool {
 	aCnt, bCnt := len(a.Points), len(b.Points)
 	// Single point case
 	if 1 == aCnt && 1 == bCnt {
 		if nil != result {
 			result.Overlap = 0
 		}
-		return a.Points[0].X() == b.Points[0].X() && a.Points[0].Y() == b.Points[0].Y()
+		return a.Points[0][0] == b.Points[0][0] && a.Points[0][1] == b.Points[0][1]
 	}

+	//Logger.Info(fmt.Sprintf("Checking collision between a=%v, b=%v", ConvexPolygonStr(a), ConvexPolygonStr(b)))
 	if 1 < aCnt {
 		for _, axis := range a.SATAxes() {
 			if isPolygonPairSeparatedByDir(a, b, axis.Unit(), result) {
@@ -110,6 +122,7 @@ func IsPolygonPairOverlapped(a, b *resolv.ConvexPolygon, result *SatResult) bool
 			}
 		}
 	}
+	//Logger.Info(fmt.Sprintf("a=%v and b=%v are overlapped", ConvexPolygonStr(a), ConvexPolygonStr(b)))

 	return true
 }
@@ -131,9 +144,10 @@ func isPolygonPairSeparatedByDir(a, b *resolv.ConvexPolygon, e vector.Vector, re
 		e = (-2.98, 1.49).Unit()
 	*/

+	//Logger.Info(fmt.Sprintf("Checking separation between a=%v, b=%v along axis e={%.3f, %.3f}#1", ConvexPolygonStr(a), ConvexPolygonStr(b), e[0], e[1]))
 	var aStart, aEnd, bStart, bEnd float64 = math.MaxFloat64, -math.MaxFloat64, math.MaxFloat64, -math.MaxFloat64
 	for _, p := range a.Points {
-		dot := (p.X()+a.X)*e.X() + (p.Y()+a.Y)*e.Y()
+		dot := (p[0]+a.X)*e[0] + (p[1]+a.Y)*e[1]

 		if aStart > dot {
 			aStart = dot
@@ -145,7 +159,7 @@ func isPolygonPairSeparatedByDir(a, b *resolv.ConvexPolygon, e vector.Vector, re
 	}

 	for _, p := range b.Points {
-		dot := (p.X()+b.X)*e.X() + (p.Y()+b.Y)*e.Y()
+		dot := (p[0]+b.X)*e[0] + (p[1]+b.Y)*e[1]

 		if bStart > dot {
 			bStart = dot
@@ -162,7 +176,6 @@ func isPolygonPairSeparatedByDir(a, b *resolv.ConvexPolygon, e vector.Vector, re
 	}

 	if nil != result {
-		result.Axis = e
 		overlap := float64(0)

 		if aStart < bStart {
@@ -203,18 +216,54 @@ func isPolygonPairSeparatedByDir(a, b *resolv.ConvexPolygon, e vector.Vector, re
 			absoluteOverlap = -overlap
 		}

-		if 0 == currentOverlap || currentOverlap > absoluteOverlap {
+		if (0 == result.Axis[0] && 0 == result.Axis[1]) || currentOverlap > absoluteOverlap {
 			var sign float64 = 1
 			if overlap < 0 {
 				sign = -1
 			}

 			result.Overlap = absoluteOverlap
-			result.OverlapX = e.X() * sign
-			result.OverlapY = e.Y() * sign
+			result.OverlapX = e[0] * sign
+			result.OverlapY = e[1] * sign
 		}
+
+		result.Axis = e
+		//Logger.Info(fmt.Sprintf("Checking separation between a=%v, b=%v along axis e={%.3f, %.3f}#2: aStart=%.3f, aEnd=%.3f, bStart=%.3f, bEnd=%.3f, overlap=%.3f, currentOverlap=%.3f, absoluteOverlap=%.3f, result=%v", ConvexPolygonStr(a), ConvexPolygonStr(b), e[0], e[1], aStart, aEnd, bStart, bEnd, overlap, currentOverlap, absoluteOverlap, result))
 	}

 	// the specified unit vector "e" doesn't separate "a" and "b", overlap result is generated
 	return false
 }
+
+func WorldToVirtualGridPos(wx, wy, worldToVirtualGridRatio float64) (int32, int32) {
+	// [WARNING] Introduces loss of precision!
+	// In JavaScript floating numbers suffer from seemingly non-deterministic arithmetics, and even if certain libs solved this issue by approaches such as fixed-point-number, they might not be used in other libs -- e.g. the "collision libs" we're interested in -- thus couldn't kill all pains.
+	var virtualGridX int32 = int32(math.Round(wx * worldToVirtualGridRatio))
+	var virtualGridY int32 = int32(math.Round(wy * worldToVirtualGridRatio))
+	return virtualGridX, virtualGridY
+}
+
+func VirtualGridToWorldPos(vx, vy int32, virtualGridToWorldRatio float64) (float64, float64) {
+	// No loss of precision
+	var wx float64 = float64(vx) * virtualGridToWorldRatio
+	var wy float64 = float64(vy) * virtualGridToWorldRatio
+	return wx, wy
+}
+
+func WorldToPolygonColliderBLPos(wx, wy, halfBoundingW, halfBoundingH, topPadding, bottomPadding, leftPadding, rightPadding, collisionSpaceOffsetX, collisionSpaceOffsetY float64) (float64, float64) {
+	return wx - halfBoundingW - leftPadding + collisionSpaceOffsetX, wy - halfBoundingH - bottomPadding + collisionSpaceOffsetY
+}
+
+func PolygonColliderBLToWorldPos(cx, cy, halfBoundingW, halfBoundingH, topPadding, bottomPadding, leftPadding, rightPadding, collisionSpaceOffsetX, collisionSpaceOffsetY float64) (float64, float64) {
+	return cx + halfBoundingW + leftPadding - collisionSpaceOffsetX, cy + halfBoundingH + bottomPadding - collisionSpaceOffsetY
+}
+
+func PolygonColliderBLToVirtualGridPos(cx, cy, halfBoundingW, halfBoundingH, topPadding, bottomPadding, leftPadding, rightPadding, collisionSpaceOffsetX, collisionSpaceOffsetY float64, worldToVirtualGridRatio float64) (int32, int32) {
+	wx, wy := PolygonColliderBLToWorldPos(cx, cy, halfBoundingW, halfBoundingH, topPadding, bottomPadding, leftPadding, rightPadding, collisionSpaceOffsetX, collisionSpaceOffsetY)
+	return WorldToVirtualGridPos(wx, wy, worldToVirtualGridRatio)
+}
+
+func VirtualGridToPolygonColliderBLPos(vx, vy int32, halfBoundingW, halfBoundingH, topPadding, bottomPadding, leftPadding, rightPadding, collisionSpaceOffsetX, collisionSpaceOffsetY float64, virtualGridToWorldRatio float64) (float64, float64) {
+	wx, wy := VirtualGridToWorldPos(vx, vy, virtualGridToWorldRatio)
+	return WorldToPolygonColliderBLPos(wx, wy, halfBoundingW, halfBoundingH, topPadding, bottomPadding, leftPadding, rightPadding, collisionSpaceOffsetX, collisionSpaceOffsetY)
+}
--- a/dnmshared/sharedprotos/geometry.pb.go
+++ b/dnmshared/sharedprotos/geometry.pb.go
@@ -0,0 +1,427 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.28.1
+// 	protoc        v3.21.4
+// source: geometry.proto
+
+package sharedprotos
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type Direction struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Dx int32 `protobuf:"varint,1,opt,name=dx,proto3" json:"dx,omitempty"`
+	Dy int32 `protobuf:"varint,2,opt,name=dy,proto3" json:"dy,omitempty"`
+}
+
+func (x *Direction) Reset() {
+	*x = Direction{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_geometry_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Direction) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Direction) ProtoMessage() {}
+
+func (x *Direction) ProtoReflect() protoreflect.Message {
+	mi := &file_geometry_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Direction.ProtoReflect.Descriptor instead.
+func (*Direction) Descriptor() ([]byte, []int) {
+	return file_geometry_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Direction) GetDx() int32 {
+	if x != nil {
+		return x.Dx
+	}
+	return 0
+}
+
+func (x *Direction) GetDy() int32 {
+	if x != nil {
+		return x.Dy
+	}
+	return 0
+}
+
+type Vec2D struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	X float64 `protobuf:"fixed64,1,opt,name=x,proto3" json:"x,omitempty"`
+	Y float64 `protobuf:"fixed64,2,opt,name=y,proto3" json:"y,omitempty"`
+}
+
+func (x *Vec2D) Reset() {
+	*x = Vec2D{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_geometry_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Vec2D) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Vec2D) ProtoMessage() {}
+
+func (x *Vec2D) ProtoReflect() protoreflect.Message {
+	mi := &file_geometry_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Vec2D.ProtoReflect.Descriptor instead.
+func (*Vec2D) Descriptor() ([]byte, []int) {
+	return file_geometry_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *Vec2D) GetX() float64 {
+	if x != nil {
+		return x.X
+	}
+	return 0
+}
+
+func (x *Vec2D) GetY() float64 {
+	if x != nil {
+		return x.Y
+	}
+	return 0
+}
+
+type Polygon2D struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Anchor *Vec2D   `protobuf:"bytes,1,opt,name=anchor,proto3" json:"anchor,omitempty"`
+	Points []*Vec2D `protobuf:"bytes,2,rep,name=points,proto3" json:"points,omitempty"`
+}
+
+func (x *Polygon2D) Reset() {
+	*x = Polygon2D{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_geometry_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Polygon2D) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Polygon2D) ProtoMessage() {}
+
+func (x *Polygon2D) ProtoReflect() protoreflect.Message {
+	mi := &file_geometry_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Polygon2D.ProtoReflect.Descriptor instead.
+func (*Polygon2D) Descriptor() ([]byte, []int) {
+	return file_geometry_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *Polygon2D) GetAnchor() *Vec2D {
+	if x != nil {
+		return x.Anchor
+	}
+	return nil
+}
+
+func (x *Polygon2D) GetPoints() []*Vec2D {
+	if x != nil {
+		return x.Points
+	}
+	return nil
+}
+
+type Vec2DList struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Eles []*Vec2D `protobuf:"bytes,1,rep,name=eles,proto3" json:"eles,omitempty"`
+}
+
+func (x *Vec2DList) Reset() {
+	*x = Vec2DList{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_geometry_proto_msgTypes[3]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Vec2DList) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Vec2DList) ProtoMessage() {}
+
+func (x *Vec2DList) ProtoReflect() protoreflect.Message {
+	mi := &file_geometry_proto_msgTypes[3]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Vec2DList.ProtoReflect.Descriptor instead.
+func (*Vec2DList) Descriptor() ([]byte, []int) {
+	return file_geometry_proto_rawDescGZIP(), []int{3}
+}
+
+func (x *Vec2DList) GetEles() []*Vec2D {
+	if x != nil {
+		return x.Eles
+	}
+	return nil
+}
+
+type Polygon2DList struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Eles []*Polygon2D `protobuf:"bytes,1,rep,name=eles,proto3" json:"eles,omitempty"`
+}
+
+func (x *Polygon2DList) Reset() {
+	*x = Polygon2DList{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_geometry_proto_msgTypes[4]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Polygon2DList) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Polygon2DList) ProtoMessage() {}
+
+func (x *Polygon2DList) ProtoReflect() protoreflect.Message {
+	mi := &file_geometry_proto_msgTypes[4]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Polygon2DList.ProtoReflect.Descriptor instead.
+func (*Polygon2DList) Descriptor() ([]byte, []int) {
+	return file_geometry_proto_rawDescGZIP(), []int{4}
+}
+
+func (x *Polygon2DList) GetEles() []*Polygon2D {
+	if x != nil {
+		return x.Eles
+	}
+	return nil
+}
+
+var File_geometry_proto protoreflect.FileDescriptor
+
+var file_geometry_proto_rawDesc = []byte{
+	0x0a, 0x0e, 0x67, 0x65, 0x6f, 0x6d, 0x65, 0x74, 0x72, 0x79, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f,
+	0x12, 0x0c, 0x73, 0x68, 0x61, 0x72, 0x65, 0x64, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x73, 0x22, 0x2b,
+	0x0a, 0x09, 0x44, 0x69, 0x72, 0x65, 0x63, 0x74, 0x69, 0x6f, 0x6e, 0x12, 0x0e, 0x0a, 0x02, 0x64,
+	0x78, 0x18, 0x01, 0x20, 0x01, 0x28, 0x05, 0x52, 0x02, 0x64, 0x78, 0x12, 0x0e, 0x0a, 0x02, 0x64,
+	0x79, 0x18, 0x02, 0x20, 0x01, 0x28, 0x05, 0x52, 0x02, 0x64, 0x79, 0x22, 0x23, 0x0a, 0x05, 0x56,
+	0x65, 0x63, 0x32, 0x44, 0x12, 0x0c, 0x0a, 0x01, 0x78, 0x18, 0x01, 0x20, 0x01, 0x28, 0x01, 0x52,
+	0x01, 0x78, 0x12, 0x0c, 0x0a, 0x01, 0x79, 0x18, 0x02, 0x20, 0x01, 0x28, 0x01, 0x52, 0x01, 0x79,
+	0x22, 0x65, 0x0a, 0x09, 0x50, 0x6f, 0x6c, 0x79, 0x67, 0x6f, 0x6e, 0x32, 0x44, 0x12, 0x2b, 0x0a,
+	0x06, 0x61, 0x6e, 0x63, 0x68, 0x6f, 0x72, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x13, 0x2e,
+	0x73, 0x68, 0x61, 0x72, 0x65, 0x64, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x73, 0x2e, 0x56, 0x65, 0x63,
+	0x32, 0x44, 0x52, 0x06, 0x61, 0x6e, 0x63, 0x68, 0x6f, 0x72, 0x12, 0x2b, 0x0a, 0x06, 0x70, 0x6f,
+	0x69, 0x6e, 0x74, 0x73, 0x18, 0x02, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x13, 0x2e, 0x73, 0x68, 0x61,
+	0x72, 0x65, 0x64, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x73, 0x2e, 0x56, 0x65, 0x63, 0x32, 0x44, 0x52,
+	0x06, 0x70, 0x6f, 0x69, 0x6e, 0x74, 0x73, 0x22, 0x34, 0x0a, 0x09, 0x56, 0x65, 0x63, 0x32, 0x44,
+	0x4c, 0x69, 0x73, 0x74, 0x12, 0x27, 0x0a, 0x04, 0x65, 0x6c, 0x65, 0x73, 0x18, 0x01, 0x20, 0x03,
+	0x28, 0x0b, 0x32, 0x13, 0x2e, 0x73, 0x68, 0x61, 0x72, 0x65, 0x64, 0x70, 0x72, 0x6f, 0x74, 0x6f,
+	0x73, 0x2e, 0x56, 0x65, 0x63, 0x32, 0x44, 0x52, 0x04, 0x65, 0x6c, 0x65, 0x73, 0x22, 0x3c, 0x0a,
+	0x0d, 0x50, 0x6f, 0x6c, 0x79, 0x67, 0x6f, 0x6e, 0x32, 0x44, 0x4c, 0x69, 0x73, 0x74, 0x12, 0x2b,
+	0x0a, 0x04, 0x65, 0x6c, 0x65, 0x73, 0x18, 0x01, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x17, 0x2e, 0x73,
+	0x68, 0x61, 0x72, 0x65, 0x64, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x73, 0x2e, 0x50, 0x6f, 0x6c, 0x79,
+	0x67, 0x6f, 0x6e, 0x32, 0x44, 0x52, 0x04, 0x65, 0x6c, 0x65, 0x73, 0x42, 0x18, 0x5a, 0x16, 0x64,
+	0x6e, 0x6d, 0x73, 0x68, 0x61, 0x72, 0x65, 0x64, 0x2f, 0x73, 0x68, 0x61, 0x72, 0x65, 0x64, 0x70,
+	0x72, 0x6f, 0x74, 0x6f, 0x73, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_geometry_proto_rawDescOnce sync.Once
+	file_geometry_proto_rawDescData = file_geometry_proto_rawDesc
+)
+
+func file_geometry_proto_rawDescGZIP() []byte {
+	file_geometry_proto_rawDescOnce.Do(func() {
+		file_geometry_proto_rawDescData = protoimpl.X.CompressGZIP(file_geometry_proto_rawDescData)
+	})
+	return file_geometry_proto_rawDescData
+}
+
+var file_geometry_proto_msgTypes = make([]protoimpl.MessageInfo, 5)
+var file_geometry_proto_goTypes = []interface{}{
+	(*Direction)(nil),     // 0: sharedprotos.Direction
+	(*Vec2D)(nil),         // 1: sharedprotos.Vec2D
+	(*Polygon2D)(nil),     // 2: sharedprotos.Polygon2D
+	(*Vec2DList)(nil),     // 3: sharedprotos.Vec2DList
+	(*Polygon2DList)(nil), // 4: sharedprotos.Polygon2DList
+}
+var file_geometry_proto_depIdxs = []int32{
+	1, // 0: sharedprotos.Polygon2D.anchor:type_name -> sharedprotos.Vec2D
+	1, // 1: sharedprotos.Polygon2D.points:type_name -> sharedprotos.Vec2D
+	1, // 2: sharedprotos.Vec2DList.eles:type_name -> sharedprotos.Vec2D
+	2, // 3: sharedprotos.Polygon2DList.eles:type_name -> sharedprotos.Polygon2D
+	4, // [4:4] is the sub-list for method output_type
+	4, // [4:4] is the sub-list for method input_type
+	4, // [4:4] is the sub-list for extension type_name
+	4, // [4:4] is the sub-list for extension extendee
+	0, // [0:4] is the sub-list for field type_name
+}
+
+func init() { file_geometry_proto_init() }
+func file_geometry_proto_init() {
+	if File_geometry_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_geometry_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Direction); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_geometry_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Vec2D); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_geometry_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Polygon2D); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_geometry_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Vec2DList); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_geometry_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Polygon2DList); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_geometry_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   5,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_geometry_proto_goTypes,
+		DependencyIndexes: file_geometry_proto_depIdxs,
+		MessageInfos:      file_geometry_proto_msgTypes,
+	}.Build()
+	File_geometry_proto = out.File
+	file_geometry_proto_rawDesc = nil
+	file_geometry_proto_goTypes = nil
+	file_geometry_proto_depIdxs = nil
+}
--- a/dnmshared/tmx_parser.go
+++ b/dnmshared/tmx_parser.go
@@ -3,9 +3,11 @@ package dnmshared
 import (
 	"bytes"
 	"compress/zlib"
+	. "dnmshared/sharedprotos"
 	"encoding/base64"
 	"encoding/xml"
 	"errors"
+	"fmt"
 	"go.uber.org/zap"
 	"io/ioutil"
 	"math"
@@ -42,13 +44,13 @@ type TmxOrTsxPolyline struct {

 type TmxOrTsxObject struct {
 	Id         int                 `xml:"id,attr"`
-	Gid        *int                `xml:"gid,attr"`
+	Gid        int                 `xml:"gid,attr"`
 	X          float64             `xml:"x,attr"`
 	Y          float64             `xml:"y,attr"`
 	Properties *TmxOrTsxProperties `xml:"properties"`
 	Polyline   *TmxOrTsxPolyline   `xml:"polyline"`
-	Width      *float64            `xml:"width,attr"`
-	Height     *float64            `xml:"height,attr"`
+	Width      float64             `xml:"width,attr"`
+	Height     float64             `xml:"height,attr"`
 }

 type TmxOrTsxObjectGroup struct {
@@ -173,8 +175,6 @@ func (l *TmxLayer) decodeBase64() ([]uint32, error) {
 	return gids, nil
 }

-type Vec2DList []*Vec2D
-type Polygon2DList []*Polygon2D
 type StrToVec2DListMap map[string]*Vec2DList
 type StrToPolygon2DListMap map[string]*Polygon2DList

@@ -233,10 +233,8 @@ func tsxPolylineToOffsetsWrtTileCenter(pTmxMapIns *TmxMap, singleObjInTsxFile *T
 	pointsCount := len(singleValueArray)

 	thePolygon2DFromPolyline := &Polygon2D{
-		Anchor:     nil,
-		Points:     make([]*Vec2D, pointsCount),
-		TileWidth:  pTsxIns.TileWidth,
-		TileHeight: pTsxIns.TileHeight,
+		Anchor: nil,
+		Points: make([]*Vec2D, pointsCount),
 	}

 	/*
@@ -327,16 +325,17 @@ func DeserializeTsxToColliderDict(pTmxMapIns *TmxMap, byteArrOfTsxFile []byte, f
 			if _, ok := theStrToPolygon2DListMap[key]; ok {
 				pThePolygon2DList = theStrToPolygon2DListMap[key]
 			} else {
-				thePolygon2DList := make(Polygon2DList, 0)
-				theStrToPolygon2DListMap[key] = &thePolygon2DList
-				pThePolygon2DList = theStrToPolygon2DListMap[key]
+				pThePolygon2DList = &Polygon2DList{
+					Eles: make([]*Polygon2D, 0),
+				}
+				theStrToPolygon2DListMap[key] = pThePolygon2DList
 			}

 			thePolygon2DFromPolyline, err := tsxPolylineToOffsetsWrtTileCenter(pTmxMapIns, singleObj, singleObj.Polyline, pTsxIns)
 			if nil != err {
 				panic(err)
 			}
-			*pThePolygon2DList = append(*pThePolygon2DList, thePolygon2DFromPolyline)
+			pThePolygon2DList.Eles = append(pThePolygon2DList.Eles, thePolygon2DFromPolyline)
 		}
 	}
 	return nil
@@ -352,8 +351,10 @@ func ParseTmxLayersAndGroups(pTmxMapIns *TmxMap, gidBoundariesMap map[int]StrToP
 			var pTheVec2DListToCache *Vec2DList
 			_, ok := toRetStrToVec2DListMap[objGroup.Name]
 			if false == ok {
-				theVec2DListToCache := make(Vec2DList, 0)
-				toRetStrToVec2DListMap[objGroup.Name] = &theVec2DListToCache
+				pTheVec2DListToCache = &Vec2DList{
+					Eles: make([]*Vec2D, 0),
+				}
+				toRetStrToVec2DListMap[objGroup.Name] = pTheVec2DListToCache
 			}
 			pTheVec2DListToCache = toRetStrToVec2DListMap[objGroup.Name]
 			for _, singleObjInTmxFile := range objGroup.Objects {
@@ -362,31 +363,56 @@ func ParseTmxLayersAndGroups(pTmxMapIns *TmxMap, gidBoundariesMap map[int]StrToP
 					Y: singleObjInTmxFile.Y,
 				}
 				thePosInWorld := pTmxMapIns.continuousObjLayerOffsetToContinuousMapNodePos(theUntransformedPos)
-				*pTheVec2DListToCache = append(*pTheVec2DListToCache, &thePosInWorld)
+				pTheVec2DListToCache.Eles = append(pTheVec2DListToCache.Eles, &thePosInWorld)
 			}
 		case "Barrier":
 			// Note that in this case, the "Polygon2D.Anchor" of each "TmxOrTsxObject" is exactly overlapping with "Polygon2D.Points[0]".
 			var pThePolygon2DListToCache *Polygon2DList
 			_, ok := toRetStrToPolygon2DListMap[objGroup.Name]
 			if false == ok {
-				thePolygon2DListToCache := make(Polygon2DList, 0)
-				toRetStrToPolygon2DListMap[objGroup.Name] = &thePolygon2DListToCache
+				pThePolygon2DListToCache = &Polygon2DList{
+					Eles: make([]*Polygon2D, 0),
+				}
+				toRetStrToPolygon2DListMap[objGroup.Name] = pThePolygon2DListToCache
 			}
-			pThePolygon2DListToCache = toRetStrToPolygon2DListMap[objGroup.Name]

 			for _, singleObjInTmxFile := range objGroup.Objects {
-				if nil == singleObjInTmxFile.Polyline {
-					continue
-				}
 				if nil == singleObjInTmxFile.Properties.Property || "boundary_type" != singleObjInTmxFile.Properties.Property[0].Name || "barrier" != singleObjInTmxFile.Properties.Property[0].Value {
 					continue
 				}

+				if nil == singleObjInTmxFile.Polyline {
+					pts := make([]*Vec2D, 4)
+					s := make([]string, 0)
+					pts[0] = &Vec2D{
+						X: float64(0),
+						Y: float64(0),
+					}
+					pts[1] = &Vec2D{
+						X: float64(0),
+						Y: singleObjInTmxFile.Height,
+					}
+					pts[2] = &Vec2D{
+						X: singleObjInTmxFile.Width,
+						Y: singleObjInTmxFile.Height,
+					}
+					pts[3] = &Vec2D{
+						X: singleObjInTmxFile.Width,
+						Y: float64(0),
+					}
+					for _, pt := range pts {
+						s = append(s, fmt.Sprintf("%v,%v", pt.X, pt.Y))
+					}
+					singleObjInTmxFile.Polyline = &TmxOrTsxPolyline{
+						Points: strings.Join(s, " "),
+					}
+				}
+
 				thePolygon2DInWorld, err := tmxPolylineToPolygon2D(pTmxMapIns, singleObjInTmxFile, singleObjInTmxFile.Polyline)
 				if nil != err {
 					panic(err)
 				}
-				*pThePolygon2DListToCache = append(*pThePolygon2DListToCache, thePolygon2DInWorld)
+				pThePolygon2DListToCache.Eles = append(pThePolygon2DListToCache.Eles, thePolygon2DInWorld)
 			}
 		default:
 		}
@@ -405,6 +431,12 @@ type TileRectilinearSize struct {
 }

 func (pTmxMapIns *TmxMap) continuousObjLayerVecToContinuousMapNodeVec(continuousObjLayerVec *Vec2D) Vec2D {
+	if "orthogonal" == pTmxMapIns.Orientation {
+		return Vec2D{
+			X: continuousObjLayerVec.X,
+			Y: -continuousObjLayerVec.Y,
+		}
+	}
 	var tileRectilinearSize TileRectilinearSize
 	tileRectilinearSize.Width = float64(pTmxMapIns.TileWidth)
 	tileRectilinearSize.Height = float64(pTmxMapIns.TileHeight)
@@ -427,55 +459,24 @@ func (pTmxMapIns *TmxMap) continuousObjLayerVecToContinuousMapNodeVec(continuous
 }

 func (pTmxMapIns *TmxMap) continuousObjLayerOffsetToContinuousMapNodePos(continuousObjLayerOffset *Vec2D) Vec2D {
-	layerOffset := Vec2D{
-		X: 0,
-		Y: float64(pTmxMapIns.Height*pTmxMapIns.TileHeight) * 0.5,
+	var layerOffset Vec2D
+	if "orthogonal" == pTmxMapIns.Orientation {
+		layerOffset = Vec2D{
+			X: -float64(pTmxMapIns.Width*pTmxMapIns.TileWidth) * 0.5,
+			Y: float64(pTmxMapIns.Height*pTmxMapIns.TileHeight) * 0.5,
+		}
+	} else {
+		// "isometric" == pTmxMapIns.Orientation
+		layerOffset = Vec2D{
+			X: 0,
+			Y: float64(pTmxMapIns.Height*pTmxMapIns.TileHeight) * 0.5,
+		}
 	}

-	calibratedVec := continuousObjLayerOffset
-	convertedVec := pTmxMapIns.continuousObjLayerVecToContinuousMapNodeVec(calibratedVec)
+	convertedVec := pTmxMapIns.continuousObjLayerVecToContinuousMapNodeVec(continuousObjLayerOffset)

-	toRet := Vec2D{
+	return Vec2D{
 		X: layerOffset.X + convertedVec.X,
 		Y: layerOffset.Y + convertedVec.Y,
 	}
-
-	return toRet
-}
-
-func AlignPolygon2DToBoundingBox(input *Polygon2D) *Polygon2D {
-	// Transform again to put "anchor" at the top-left point of the bounding box for "resolv"
-	float64Max := float64(99999999999999.9)
-	boundingBoxTL := &Vec2D{
-		X: float64Max,
-		Y: float64Max,
-	}
-	for _, p := range input.Points {
-		if p.X < boundingBoxTL.X {
-			boundingBoxTL.X = p.X
-		}
-		if p.Y < boundingBoxTL.Y {
-			boundingBoxTL.Y = p.Y
-		}
-	}
-
-	// Now "input.Anchor" should move to "input.Anchor+boundingBoxTL", thus "boundingBoxTL" is also the value of the negative diff for all "input.Points"
-	output := &Polygon2D{
-		Anchor: &Vec2D{
-			X: input.Anchor.X + boundingBoxTL.X,
-			Y: input.Anchor.Y + boundingBoxTL.Y,
-		},
-		Points:     make([]*Vec2D, len(input.Points)),
-		TileWidth:  input.TileWidth,
-		TileHeight: input.TileHeight,
-	}
-
-	for i, p := range input.Points {
-		output.Points[i] = &Vec2D{
-			X: p.X - boundingBoxTL.X,
-			Y: p.Y - boundingBoxTL.Y,
-		}
-	}
-
-	return output
 }
--- a/dragonBonesProjects/SoldierElf.dbproj
+++ b/dragonBonesProjects/SoldierElf.dbproj
--- a/dragonBonesProjects/SoldierFireGhost.dbproj
+++ b/dragonBonesProjects/SoldierFireGhost.dbproj
--- a/dragonBonesProjects/SoldierWaterGhost.dbproj
+++ b/dragonBonesProjects/SoldierWaterGhost.dbproj
--- a/dragonBonesProjects/library/SoldierElf.json
+++ b/dragonBonesProjects/library/SoldierElf.json
@@ -0,0 +1 @@
+{"width":128,"imagePath":"SoldierElf_tex.png","height":128,"name":"SoldierElf","SubTexture":[{"frameHeight":45,"y":1,"frameX":0,"width":34,"frameY":0,"height":44,"name":"cape","frameWidth":34,"x":70},{"width":10,"y":107,"height":14,"name":"shouder_l","x":74},{"width":11,"y":107,"height":14,"name":"forearm_l","x":61},{"width":15,"y":93,"height":16,"name":"hand_l","x":1},{"width":30,"y":61,"height":30,"name":"weapon_hand_l","x":1},{"width":8,"y":101,"height":11,"name":"thigh_l","x":86},{"width":12,"y":93,"height":17,"name":"calf_l","x":18},{"width":20,"y":113,"height":8,"name":"foot_l","x":39},{"width":28,"y":61,"height":31,"name":"pelvis","x":33},{"width":8,"y":88,"height":11,"name":"thigh_r","x":77},{"width":12,"y":88,"height":17,"name":"calf_r","x":63},{"width":20,"y":113,"height":8,"name":"foot_r","x":17},{"width":13,"y":94,"height":12,"name":"shouder_r","x":45},{"width":67,"y":1,"height":58,"name":"chest","x":1},{"width":11,"y":94,"height":17,"name":"forearm_r","x":32},{"width":14,"y":111,"height":13,"name":"hand_r","x":1},{"frameHeight":39,"y":47,"frameX":-2,"width":34,"frameY":0,"height":39,"name":"we_bl_4_f_1","frameWidth":36,"x":70}]}
--- a/dragonBonesProjects/library/SoldierElf.png
+++ b/dragonBonesProjects/library/SoldierElf.png
--- a/dragonBonesProjects/library/SoldierFireGhost.json
+++ b/dragonBonesProjects/library/SoldierFireGhost.json
@@ -0,0 +1 @@
+{"imagePath":"Soldier_02_tex.png","width":128,"name":"Soldier_02","SubTexture":[{"x":53,"y":44,"width":23,"name":"biu","height":22},{"x":76,"y":68,"width":9,"name":"rightArm","height":14},{"y":35,"frameY":0,"height":32,"frameWidth":29,"frameX":-1,"frameHeight":32,"width":27,"name":"yinmoqe00","x":89},{"x":53,"y":1,"width":34,"name":"body","height":41},{"x":78,"y":44,"width":9,"name":"rightShoulder","height":13},{"y":50,"frameY":0,"height":18,"frameWidth":19,"frameX":0,"frameHeight":18,"width":19,"name":"rightFrontArm","x":23},{"x":23,"y":70,"width":14,"name":"rightHand","height":14},{"y":68,"frameY":0,"height":12,"frameWidth":12,"frameX":0,"frameHeight":12,"width":12,"name":"leftArm","x":62},{"x":1,"y":73,"width":13,"name":"leftShoulder","height":12},{"x":1,"y":50,"width":20,"name":"leftFrontArm","height":21},{"x":89,"y":1,"width":33,"name":"head","height":32},{"x":1,"y":1,"width":50,"name":"head2","height":47},{"x":44,"y":68,"width":16,"name":"leftHand","height":14},{"y":59,"frameY":-2,"height":4,"frameWidth":8,"frameX":-1,"frameHeight":8,"width":4,"name":"huomiao01","x":78}],"height":128}
--- a/dragonBonesProjects/library/SoldierFireGhost.png
+++ b/dragonBonesProjects/library/SoldierFireGhost.png
--- a/dragonBonesProjects/library/SoldierWaterGhost.json
+++ b/dragonBonesProjects/library/SoldierWaterGhost.json
@@ -0,0 +1 @@
+{"width":128,"SubTexture":[{"frameWidth":23,"y":50,"frameX":-2,"frameHeight":22,"frameY":-2,"width":19,"height":19,"name":"biu","x":1},{"width":9,"y":50,"height":14,"name":"rightArm","x":42},{"frameWidth":29,"y":34,"frameX":-6,"frameHeight":32,"frameY":0,"width":20,"height":32,"name":"yinmoqe00","x":88},{"frameWidth":34,"y":1,"frameX":0,"frameHeight":41,"frameY":0,"width":33,"height":39,"name":"body","x":53},{"width":9,"y":56,"height":13,"name":"rightShoulder","x":74},{"frameWidth":19,"y":50,"frameX":0,"frameHeight":18,"frameY":0,"width":18,"height":17,"name":"rightFrontArm","x":22},{"width":14,"y":50,"height":14,"name":"rightHand","x":110},{"width":12,"y":42,"height":12,"name":"leftArm","x":74},{"width":13,"y":66,"height":12,"name":"leftShoulder","x":110},{"frameWidth":20,"y":42,"frameX":-1,"frameHeight":21,"frameY":0,"width":19,"height":21,"name":"leftFrontArm","x":53},{"width":50,"y":1,"height":47,"name":"head2","x":1},{"frameWidth":33,"y":1,"frameX":-1,"frameHeight":32,"frameY":0,"width":32,"height":31,"name":"head","x":88},{"width":16,"y":34,"height":14,"name":"leftHand","x":110},{"frameWidth":8,"y":1,"frameX":-2,"frameHeight":8,"frameY":-3,"width":2,"height":2,"name":"huomiao01","x":122}],"height":128,"name":"SoldierWaterGhost","imagePath":"SoldierWaterGhost_tex.png"}
--- a/dragonBonesProjects/library/SoldierWaterGhost.png
+++ b/dragonBonesProjects/library/SoldierWaterGhost.png
--- a/frontend/assets/plugin_scripts/protobuf.js
+++ b/frontend/assets/plugin_scripts/protobuf.js
--- a/frontend/assets/plugin_scripts/protobuf.js.meta
+++ b/frontend/assets/plugin_scripts/protobuf.js.meta
@@ -1,9 +0,0 @@
-{
-  "ver": "1.0.5",
-  "uuid": "bd514df4-095e-4088-9060-d99397a29a4f",
-  "isPlugin": true,
-  "loadPluginInWeb": true,
-  "loadPluginInNative": true,
-  "loadPluginInEditor": false,
-  "subMetas": {}
-}
--- a/frontend/assets/resources/animation/BluePacman/Bottom.anim
+++ b/frontend/assets/resources/animation/BluePacman/Bottom.anim
@@ -1,31 +0,0 @@
-{
-  "__type__": "cc.AnimationClip",
-  "_name": "Bottom",
-  "_objFlags": 0,
-  "_native": "",
-  "_duration": 0.25,
-  "sample": 12,
-  "speed": 1,
-  "wrapMode": "2",
-  "curveData": {
-    "comps": {
-      "cc.Sprite": {
-        "spriteFrame": [
-          {
-            "frame": 0,
-            "value": {
-              "__uuid__": "783f1240-d608-40be-8108-3013ab53cfe6"
-            }
-          },
-          {
-            "frame": 0.16666666666666666,
-            "value": {
-              "__uuid__": "393e649b-addb-4f91-b687-438433026c8d"
-            }
-          }
-        ]
-      }
-    }
-  },
-  "events": []
-}
--- a/frontend/assets/resources/animation/BluePacman/Bottom.anim.meta
+++ b/frontend/assets/resources/animation/BluePacman/Bottom.anim.meta
@@ -1,5 +0,0 @@
-{
-  "ver": "2.1.0",
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--- a/frontend/assets/resources/animation/BluePacman/Top.anim
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--- a/frontend/assets/resources/animation/BluePacman/TopRight.anim
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--- a/frontend/assets/resources/animation/BluePacman/attackedLeft.anim.meta
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-      "cc.Sprite": {
-        "spriteFrame": [
-          {
-            "frame": 0,
-            "value": {
-              "__uuid__": "c9528117-c878-41aa-ad5d-641fefcaa89f"
-            }
-          },
-          {
-            "frame": 0.08333333333333333,
-            "value": {
-              "__uuid__": "987c7dc0-e81f-4891-979d-0998794e6889"
-            }
-          },
-          {
-            "frame": 0.16666666666666666,
-            "value": {
-              "__uuid__": "c0e5d042-8bc1-449b-9a2d-7844129c5188"
-            }
-          },
-          {
-            "frame": 0.25,
-            "value": {
-              "__uuid__": "9205c378-c50c-4303-af32-dbf9422375cf"
-            }
-          }
-        ]
-      }
-    }
-  },
-  "events": []
-}
--- a/frontend/assets/resources/animation/RedPacman/attackedLeft.anim.meta
+++ b/frontend/assets/resources/animation/RedPacman/attackedLeft.anim.meta
@@ -1,5 +0,0 @@
-{
-  "ver": "2.1.0",
-  "uuid": "af16cdcb-6e82-4be6-806d-9fc52ae99fff",
-  "subMetas": {}
-}
--- a/frontend/assets/resources/animation/RedPacman/attackedRight.anim
+++ b/frontend/assets/resources/animation/RedPacman/attackedRight.anim
@@ -1,43 +0,0 @@
-{
-  "__type__": "cc.AnimationClip",
-  "_name": "attackedRight",
-  "_objFlags": 0,
-  "_native": "",
-  "_duration": 0.3333333333333333,
-  "sample": 12,
-  "speed": 1,
-  "wrapMode": "2",
-  "curveData": {
-    "comps": {
-      "cc.Sprite": {
-        "spriteFrame": [
-          {
-            "frame": 0,
-            "value": {
-              "__uuid__": "1054cf4c-69a5-4834-8966-03bc613d4483"
-            }
-          },
-          {
-            "frame": 0.08333333333333333,
-            "value": {
-              "__uuid__": "8f3cf81e-1251-4013-b684-13f2830c7425"
-            }
-          },
-          {
-            "frame": 0.16666666666666666,
-            "value": {
-              "__uuid__": "b88522bd-8b6b-44a1-9c84-5518ae7f5c2c"
-            }
-          },
-          {
-            "frame": 0.25,
-            "value": {
-              "__uuid__": "69f1bd37-6628-4fd1-b0f2-08073d1edb29"
-            }
-          }
-        ]
-      }
-    }
-  },
-  "events": []
-}
--- a/frontend/assets/resources/animation/RedPacman/attackedRight.anim.meta
+++ b/frontend/assets/resources/animation/RedPacman/attackedRight.anim.meta
@@ -1,5 +0,0 @@
-{
-  "ver": "2.1.0",
-  "uuid": "02eba566-4d22-4fa7-99d7-f032f5845421",
-  "subMetas": {}
-}
--- a/frontend/assets/resources/animation/SolderWaterGhost.meta
+++ b/frontend/assets/resources/animation/SolderWaterGhost.meta
@@ -1,6 +1,6 @@
 {
  "ver": "1.0.1",
-  "uuid": "135f388e-7e75-4ece-b267-4e07835cba74",
+  "uuid": "8f2f76c7-649c-414a-80be-b2daef4ed580",
  "isSubpackage": false,
  "subpackageName": "",
  "subMetas": {}
--- a/frontend/assets/resources/animation/SolderWaterGhost/SoldierWaterGhost_ske.json
+++ b/frontend/assets/resources/animation/SolderWaterGhost/SoldierWaterGhost_ske.json
--- a/frontend/assets/resources/animation/SolderWaterGhost/SoldierWaterGhost_ske.json.meta
+++ b/frontend/assets/resources/animation/SolderWaterGhost/SoldierWaterGhost_ske.json.meta
--- a/frontend/assets/resources/animation/SolderWaterGhost/SoldierWaterGhost_tex.json
+++ b/frontend/assets/resources/animation/SolderWaterGhost/SoldierWaterGhost_tex.json
@@ -0,0 +1 @@
+{"imagePath":"SoldierWaterGhost_tex.png","width":64,"height":64,"name":"SoldierWaterGhost","SubTexture":[{"frameY":-1,"y":27,"frameWidth":12,"frameHeight":11,"width":10,"height":10,"name":"biu","frameX":-1,"x":1},{"width":5,"y":23,"height":7,"name":"rightArm","x":40},{"frameY":0,"y":19,"frameWidth":15,"frameHeight":16,"width":10,"height":16,"name":"yinmoqe00","frameX":-3,"x":47},{"frameY":0,"y":1,"frameWidth":17,"frameHeight":21,"width":17,"height":20,"name":"body","frameX":0,"x":28},{"width":5,"y":37,"height":7,"name":"rightShoulder","x":42},{"frameY":0,"y":27,"frameWidth":10,"frameHeight":9,"width":9,"height":9,"name":"rightFrontArm","frameX":0,"x":13},{"width":7,"y":38,"height":7,"name":"rightHand","x":13},{"width":6,"y":36,"height":6,"name":"leftArm","x":34},{"width":7,"y":39,"height":6,"name":"leftShoulder","x":1},{"frameY":0,"y":23,"frameWidth":10,"frameHeight":11,"width":10,"height":11,"name":"leftFrontArm","frameX":-1,"x":28},{"width":25,"y":1,"height":24,"name":"head2","x":1},{"frameY":0,"y":1,"frameWidth":17,"frameHeight":16,"width":16,"height":16,"name":"head","frameX":-1,"x":47},{"width":8,"y":36,"height":7,"name":"leftHand","x":24},{"frameY":-2,"y":32,"frameWidth":4,"frameHeight":4,"width":1,"height":1,"name":"huomiao01","frameX":-1,"x":42}]}
--- a/frontend/assets/resources/animation/SolderWaterGhost/SoldierWaterGhost_tex.json.meta
+++ b/frontend/assets/resources/animation/SolderWaterGhost/SoldierWaterGhost_tex.json.meta
@@ -0,0 +1,7 @@
+{
+  "ver": "1.0.0",
+  "uuid": "e9e703e9-3589-4713-b889-28b23406d220",
+  "atlasJson": "{\"imagePath\":\"SoldierWaterGhost_tex.png\",\"width\":64,\"height\":64,\"name\":\"SoldierWaterGhost\",\"SubTexture\":[{\"frameY\":-1,\"y\":27,\"frameWidth\":12,\"frameHeight\":11,\"width\":10,\"height\":10,\"name\":\"biu\",\"frameX\":-1,\"x\":1},{\"width\":5,\"y\":23,\"height\":7,\"name\":\"rightArm\",\"x\":40},{\"frameY\":0,\"y\":19,\"frameWidth\":15,\"frameHeight\":16,\"width\":10,\"height\":16,\"name\":\"yinmoqe00\",\"frameX\":-3,\"x\":47},{\"frameY\":0,\"y\":1,\"frameWidth\":17,\"frameHeight\":21,\"width\":17,\"height\":20,\"name\":\"body\",\"frameX\":0,\"x\":28},{\"width\":5,\"y\":37,\"height\":7,\"name\":\"rightShoulder\",\"x\":42},{\"frameY\":0,\"y\":27,\"frameWidth\":10,\"frameHeight\":9,\"width\":9,\"height\":9,\"name\":\"rightFrontArm\",\"frameX\":0,\"x\":13},{\"width\":7,\"y\":38,\"height\":7,\"name\":\"rightHand\",\"x\":13},{\"width\":6,\"y\":36,\"height\":6,\"name\":\"leftArm\",\"x\":34},{\"width\":7,\"y\":39,\"height\":6,\"name\":\"leftShoulder\",\"x\":1},{\"frameY\":0,\"y\":23,\"frameWidth\":10,\"frameHeight\":11,\"width\":10,\"height\":11,\"name\":\"leftFrontArm\",\"frameX\":-1,\"x\":28},{\"width\":25,\"y\":1,\"height\":24,\"name\":\"head2\",\"x\":1},{\"frameY\":0,\"y\":1,\"frameWidth\":17,\"frameHeight\":16,\"width\":16,\"height\":16,\"name\":\"head\",\"frameX\":-1,\"x\":47},{\"width\":8,\"y\":36,\"height\":7,\"name\":\"leftHand\",\"x\":24},{\"frameY\":-2,\"y\":32,\"frameWidth\":4,\"frameHeight\":4,\"width\":1,\"height\":1,\"name\":\"huomiao01\",\"frameX\":-1,\"x\":42}]}",
+  "texture": "def168c3-3f07-43f9-a460-36b397c70a57",
+  "subMetas": {}
+}
--- a/frontend/assets/resources/animation/SolderWaterGhost/SoldierWaterGhost_tex.png
+++ b/frontend/assets/resources/animation/SolderWaterGhost/SoldierWaterGhost_tex.png
--- a/frontend/assets/resources/animation/SolderWaterGhost/SoldierWaterGhost_tex.png.meta
+++ b/frontend/assets/resources/animation/SolderWaterGhost/SoldierWaterGhost_tex.png.meta
@@ -1,6 +1,6 @@
 {
  "ver": "2.3.3",
-  "uuid": "c30bd4d7-efdc-410c-8bdf-4a3dfc77bebd",
+  "uuid": "def168c3-3f07-43f9-a460-36b397c70a57",
  "type": "sprite",
  "wrapMode": "clamp",
  "filterMode": "bilinear",
@@ -9,21 +9,21 @@
  "packable": true,
  "platformSettings": {},
  "subMetas": {
-    "Tile_W300_H300_S01": {
+    "SoldierWaterGhost_tex": {
      "ver": "1.0.4",
-      "uuid": "66b49304-7b5b-442c-92a5-d2b368abf659",
-      "rawTextureUuid": "c30bd4d7-efdc-410c-8bdf-4a3dfc77bebd",
+      "uuid": "52fb0606-bbea-433c-803b-bf5ce936a0df",
+      "rawTextureUuid": "def168c3-3f07-43f9-a460-36b397c70a57",
      "trimType": "auto",
      "trimThreshold": 1,
      "rotated": false,
-      "offsetX": 4,
-      "offsetY": -24.5,
-      "trimX": 97,
-      "trimY": 85,
-      "width": 114,
-      "height": 179,
-      "rawWidth": 300,
-      "rawHeight": 300,
+      "offsetX": 0,
+      "offsetY": 9,
+      "trimX": 1,
+      "trimY": 1,
+      "width": 62,
+      "height": 44,
+      "rawWidth": 64,
+      "rawHeight": 64,
      "borderTop": 0,
      "borderBottom": 0,
      "borderLeft": 0,
--- a/frontend/assets/resources/map/simple/BackgroundMap.meta
+++ b/frontend/assets/resources/map/simple/BackgroundMap.meta
@@ -1,6 +1,6 @@
 {
  "ver": "1.0.1",
-  "uuid": "51c54820-d753-4be8-a855-5760eed8f7ef",
+  "uuid": "2202f4f4-b792-4dea-8302-633315aded66",
  "isSubpackage": false,
  "subpackageName": "",
  "subMetas": {}
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
genxium	34c4a24b64	Further enhanced backend dynamics force confirmation trigger.	2022-12-18 19:41:13 +08:00
genxium	4e7c3060fe	Fixed frontend packaging.	2022-12-18 16:59:38 +08:00
genxium	2928cbbe3c	Updated comments.	2022-12-18 14:03:22 +08:00
genxium	850eee20a8	Enhanced forceConfirmation trigger for backend dynamics.	2022-12-18 12:20:44 +08:00
genxium	5eec7fcfe7	Minor fix.	2022-12-17 18:22:52 +08:00
genxium	4e42c0770c	Updated anim of the second character.	2022-12-17 18:15:29 +08:00
genxium	8647c1a859	Enhanced force-resync mechanism to guarantee consistency across all players in a same room upon anyone reconnected.	2022-12-16 18:59:58 +08:00
genxium	a41c68fb13	Applied snapping on all-sides to avoid random zero-overlap detection uncertainty.	2022-12-16 15:57:49 +08:00
Wing	c5b26d716e	Merge pull request #15 from genxium/jumping_impl Added jumping sync.	2022-12-15 15:41:57 +08:00
genxium	1e0959c4cf	Updated README.	2022-12-15 15:40:08 +08:00
genxium	3e54670a1b	Updated ConcerningEdgeCases.md	2022-12-15 15:03:41 +08:00
genxium	b41b86bbd3	Fixes for bullet and anim offset.	2022-12-15 12:43:34 +08:00
genxium	db2bc0e3cd	Updated barrier boundaries and player collider paddings to feature almost-all-integer coordinates.	2022-12-15 11:22:17 +08:00
genxium	eedcf5c4dc	Temp broken commit.	2022-12-14 23:17:06 +08:00
genxium	c171ebc211	Draft version for jumping with backend sync.	2022-12-13 23:56:56 +08:00
genxium	5a463239bb	Temp broken commit, but it's working for OfflineMap.	2022-12-13 16:42:31 +08:00
genxium	5c06cfdbac	More preparations on backend to sync jumping.	2022-12-12 19:11:59 +08:00
genxium	7985a242fd	Updated OfflineMap position loading.	2022-12-12 16:42:11 +08:00
genxium	bef1df48aa	Prepared backend for jumping sync.	2022-12-11 20:09:06 +08:00
genxium	8d989d543a	Improved offline map for code abstraction and testing.	2022-12-11 17:26:55 +08:00
genxium	849ce34fe5	Added debug drawing for OfflineMap.	2022-12-11 12:20:42 +08:00
genxium	195a400dc2	Minor fix.	2022-12-10 18:12:20 +08:00
genxium	66dfcaa0f5	Fixes for platform snapping.	2022-12-10 12:47:02 +08:00
genxium	9917a62526	Drafted basic jumping.	2022-12-10 00:07:03 +08:00
genxium	62e50f8b6c	Drafted use of gravity.	2022-12-09 17:22:04 +08:00
genxium	dc66be1599	Improved use of backend ConvertToLastUsedRenderFrameId.	2022-12-06 20:56:09 +08:00
genxium	858eba5243	Updated comments.	2022-12-06 13:53:27 +08:00
Wing	d113cffc7d	Merge pull request #13 from genxium/downsync-order-preservation Fixes for downsync order preservation.	2022-12-06 11:54:49 +08:00
genxium	6af9a14be5	Fixes for downsync order preservation.	2022-12-06 11:49:00 +08:00
genxium	e3fe773634	Fixed (refRenderFrameId, snapshotStFrameId) pairing in "markConfirmationIfApplicable".	2022-12-05 21:17:18 +08:00
genxium	17cac19c62	Fix on backend "createInputsBufferSnapshot".	2022-12-05 17:27:44 +08:00
Wing	26bdd41285	Merge pull request #11 from genxium/backend_locking_improvement Improved backend implementation.	2022-12-05 15:27:30 +08:00
genxium	6bf70463fa	Improved backend implementation.	2022-12-05 15:23:56 +08:00
genxium	e3d844abad	Improving backend use of room.InputsBufferLock.	2022-12-04 23:37:01 +08:00
genxium	0373665382	Minor updates on ringbuffer and formatting.	2022-12-02 10:20:58 +08:00
genxium	3b0db64792	Updated README.	2022-12-01 15:46:36 +08:00
Wing	dd8b731ade	Merge pull request #10 from genxium/force_confirmation_isolation Improvement on smooth synchronization.	2022-12-01 15:25:57 +08:00
genxium	c4489e0912	Fixed backend downsyncToAll battleState filtering.	2022-12-01 15:23:43 +08:00
genxium	348c889e14	Fixes on resync.	2022-12-01 11:53:37 +08:00
yflu	c6473db561	In progress for fixing recovery upon reconnection.	2022-12-01 00:30:35 +08:00
genxium	e165d49cb1	Further simplified signaling.	2022-11-30 21:51:06 +08:00
genxium	26370dce61	Added necessary locking for backend InputsBuffer.	2022-11-30 16:53:48 +08:00
yflu	f3a12b2aa9	A temp broken commit.	2022-11-30 00:04:52 +08:00
genxium	1f5802ee14	Fixed multiple error handling spots.	2022-11-29 21:32:18 +08:00
yflu	080a384ade	Working on reduction of resync received in frontend.	2022-11-29 12:49:49 +08:00
genxium	9469b27348	Updated use of GOPROXY param in Makefile.	2022-11-28 23:49:52 +08:00
Wing	ca5ba83b07	Merge pull request #9 from genxium/frame_anim_compatible Frame anim compatible	2022-11-27 21:38:24 +08:00
genxium	b1f0cf2c57	Added frame anim compatibility for AttackingCharacter.	2022-11-27 21:33:34 +08:00
genxium	1b43e6d760	Reduced dragonbones exported resource size.	2022-11-27 19:38:26 +08:00
genxium	e0fb21f3fb	Fixes for simultaneous reconnection w.r.t. same room, and updates for documentation.	2022-11-27 00:00:39 +08:00
genxium	9bce561441	Minor fix for README.	2022-11-26 00:14:11 +08:00
genxium	52be2a6a79	Simplified frontend anim handling.	2022-11-26 00:04:22 +08:00
genxium	fa491b357d	Fixed frontend animation switch after atk and stun.	2022-11-25 22:44:01 +08:00
genxium	695eacaabc	Fixed frontend animation switch.	2022-11-25 21:53:30 +08:00
genxium	0324b584a5	Fixed frontend countdown display.	2022-11-25 17:57:10 +08:00
genxium	70e552f5f0	Simplified frontend handling of RoomDownsyncFrame.	2022-11-25 13:26:22 +08:00
genxium	c58e690a47	Updated frontend animation trigger mechanism.	2022-11-25 12:05:22 +08:00
genxium	1593965950	Fixed backend bullet collision handling.	2022-11-25 09:07:43 +08:00
genxium	2a1105efa4	Added collision debug logs in backend.	2022-11-24 21:56:34 +08:00
genxium	04de4666d5	Fixes for melee attack sync.	2022-11-24 20:46:44 +08:00
Wing	2290c57c1c	Merge pull request #8 from genxium/character_attack Added melee attack feature.	2022-11-24 17:51:46 +08:00
genxium	24d5ad9dc8	Drafted backend handling of melee attack.	2022-11-24 17:48:07 +08:00
genxium	fdc296531a	A broken commit during backend bullet adaptation.	2022-11-24 12:48:03 +08:00
genxium	becc56f672	Minor fix.	2022-11-23 16:25:08 +08:00
yflu	58c18ab7ae	Drafted rollback compatible bullet lifecycle events.	2022-11-23 12:30:30 +08:00
genxium	024d527f3d	Drafted attack trigger logic in OfflineMap.	2022-11-22 22:31:06 +08:00
genxium	9b29edaaa1	Added resources for WaterGhost animation.	2022-11-22 16:19:04 +08:00
genxium	360f2fc22b	Simplified backend config loading.	2022-11-21 17:27:32 +08:00
yflu	2dbc529978	Fixes for jiggling character animation on resynced.	2022-11-21 00:23:01 +08:00
genxium	d21f59cafa	Minor fix.	2022-11-20 21:07:45 +08:00
Wing	335fef66ef	Merge pull request #7 from genxium/dungeon_characters Updated anim of characters, and minor updates to inputs on wire to support atk button.	2022-11-20 20:18:44 +08:00
genxium	52480ab29f	Updated TouchEventsManager to support input from Keyboard as well as an additional atk btn.	2022-11-20 20:13:08 +08:00
genxium	971f6461ab	Updated charts.	2022-11-20 12:27:29 +08:00
genxium	061aa449c9	Fixes for online map class to use updated character animations.	2022-11-19 22:59:12 +08:00
genxium	78dd9ecd85	Initial commit for offline map, might break the online version.	2022-11-19 20:58:07 +08:00
yflu	d4226137b6	Initial draft of an offline map for testing new characters.	2022-11-17 23:39:32 +08:00
yflu	e432026fec	Fixed proto_gen_shortcut script for OSX.	2022-11-17 23:13:53 +08:00
Wing	3e7718ed04	Merge pull request #6 from genxium/dungeon_battle Added support of ORTHO orientation tmx.	2022-11-17 16:51:11 +08:00
genxium	b78dd54431	Regenerated new resource ccc meta files.	2022-11-17 15:10:17 +08:00
genxium	22fb72afbc	Fixed frontend tmx parsing for ortho map.	2022-11-17 15:01:35 +08:00
genxium	7b9172c27b	Fixed backend tmx parsing for ortho map.	2022-11-16 21:32:25 +08:00
genxium	7e12853a73	Added fineart resources.	2022-11-16 20:58:12 +08:00
genxium	95dcc2ef17	Updated README.	2022-11-13 22:23:54 +08:00
Wing	63164569b1	Merge pull request #5 from genxium/integer_positioning Integer positioning.	2022-11-13 14:14:50 +08:00
genxium	8a4efd023b	Updated README.	2022-11-13 14:13:19 +08:00
genxium	b031fc1c61	Minor fix on backend coordinate ratio conversion.	2022-11-13 13:06:52 +08:00
genxium	4369729d9c	Fixed recovery upon reconnection.	2022-11-13 11:37:30 +08:00
genxium	2d080ad134	Fixed backend collision constants.	2022-11-12 22:53:35 +08:00
genxium	bd9beec5e5	Added more helper functions for backend collision debugging.	2022-11-12 20:34:38 +08:00
genxium	89a54211e1	Aligned constants used for backend collision unit-testing.	2022-11-12 12:18:00 +08:00
genxium	a4ebde3e07	Updated CLI unit tests again.	2022-11-12 11:41:18 +08:00
genxium	41967b11f7	Updated CLI unit tests.	2022-11-12 11:20:16 +08:00
genxium	98daeff408	Updated frontend logging.	2022-11-11 23:43:51 +08:00
genxium	320e98361e	Fixes for resync.	2022-11-11 20:10:43 +08:00
genxium	15a062af10	Completed frontend refactoring for more convenient unit testing.	2022-11-11 13:27:48 +08:00
yflu	3f4e49656a	Temp broken commit during frontend refactoring.	2022-11-11 00:04:00 +08:00
genxium	f97ce22cef	Refactored backend for convenience of unit-testing.	2022-11-10 21:28:46 +08:00
genxium	901b189c5a	Improvements on using integer positioning.	2022-11-10 18:18:00 +08:00
genxium	e5ed8124e8	Minor updates to frontend collider position reset pace.	2022-11-09 23:53:45 +08:00
genxium	885443c2b1	Fixes to frontend coordinate conversion.	2022-11-09 23:46:11 +08:00
genxium	aa795fcee5	Fixed frontend compilation.	2022-11-09 18:13:53 +08:00
genxium	cb3c19a339	Fixed Golang part compilation.	2022-11-09 14:20:26 +08:00
yflu	d3d3629618	A broken commit.	2022-11-09 12:19:29 +08:00
genxium	f37f4337de	Minor update to floating number precision.	2022-11-08 21:38:23 +08:00
genxium	1a3b3a0a7a	Fixed multi-barrier collision handling in backend.	2022-11-06 13:42:40 +08:00
genxium	4f1ce0d71a	Fixed typos.	2022-11-03 10:06:21 +08:00
genxium	1f728071a9	Updated charts.	2022-11-03 00:16:03 +08:00
Wing	4b68917337	Fixed typo.	2022-11-02 12:40:26 +08:00
genxium	0cbf968228	Updated README.	2022-11-02 10:57:37 +08:00
genxium	ec2a21dbe7	Minor fix for "false == Room.BackendDynamicsEnabled".	2022-10-31 09:02:14 +08:00
Wing	dc6402c2b7	Updated README.	2022-10-26 10:28:32 +08:00
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