Minor fix.

README.md

@@ -3,19 +3,14 @@
 This project is a demo for a websocket-based rollback netcode inspired by [GGPO](https://github.com/pond3r/ggpo/blob/master/doc/README.md). As lots of feedbacks ask for a discussion on using UDP instead, I tried to summarize my personal opinion about it in [ConcerningEdgeCases](./ConcerningEdgeCases.md) -- not necessarily correct but that's indeed a question to face :)
 
 The following video is recorded over INTERNET using an input delay of 4 frames and it feels SMOOTH when playing! Please also checkout these demo videos
-- [source video of the first gif](https://pan.baidu.com/s/1ML6hNupaPHPJRd5rcTvQvw?pwd=8ruc) 
+- [source video of the first gif (earlier version)](https://pan.baidu.com/s/1ML6hNupaPHPJRd5rcTvQvw?pwd=8ruc) 
-- [phone v.s. PC over internet battle#1](https://pan.baidu.com/s/1NuGxuMwrV_jalcToyUZPLg?pwd=kfkr) 
+- [source video of the second gif (added turn-around optimization & dashing)](https://pan.baidu.com/s/1isMcLvxax4NNkDgitV_FDg?pwd=s1i6) 
-- [phone v.s. PC over internet battle#2](https://pan.baidu.com/s/1kMiFdwDHyJpZJ0GGU1Y3eA?pwd=46gd) 
-- [PC Wifi viewing Phone 4g](https://pan.baidu.com/s/1PJEtC9iB_fcabMWhbx2oAg?pwd=tp7k) 
-- [PC Wifi viewing Phone Wifi (over internet of course)](https://pan.baidu.com/s/108rvC1CcUdiQeMauXWsLJg?pwd=mn39) 
 
 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.
 
 ![gif_demo_1](./charts/internet_fireball_explosion_wallmove_spedup.gif)
 
-![gif_demo_2](./charts/jump_sync_spedup.gif)
+![gif_demo_2](./charts/internet_dash_turnaround_cut_spedup.gif)
-
-All gifs are sped up to ~1.5x for file size reduction, kindly note that animations are resumed from a partial progress!
 
 # Notable Features
 - Backend dynamics toggle via [Room.BackendDynamicsEnabled](https://github.com/genxium/DelayNoMore/blob/v0.9.14/battle_srv/models/room.go#L786)
@@ -111,3 +106,5 @@ Moreover, in practice I found that to spot sync anomalies, the following tools a
 - Detection of [prediction mismatch on the frontend](https://github.com/genxium/DelayNoMore/blob/v0.9.19/frontend/assets/scripts/Map.js#L842).
 - Detection of [type#1 forceConfirmation on the backend](https://github.com/genxium/DelayNoMore/blob/v0.9.19/battle_srv/models/room.go#L1246).
 - Detection of [type#2 forceConfirmation on the backend](https://github.com/genxium/DelayNoMore/blob/v0.9.19/battle_srv/models/room.go#L1259).
+
+There's also some useful information displayed on the frontend when `true == Map.showNetworkDoctorInfo`.

frontend/assets/plugin_scripts/NetworkDoctor.js

@@ -1,66 +0,0 @@
-function NetworkDoctor(serverFps, clientUpsyncFps) {
-  this.serverFps = serverFps;
-  this.clientUpsyncFps = clientUpsyncFps;
-  this.millisPerServerFrame = parseInt(1000 / this.serverFps);
-  this._tooLongSinceLastFrameDiffReceivedThreshold = (this.millisPerServerFrame << 6);
-
-  this.setupFps = function(fps) {
-    this.serverFps = this.clientUpsyncFps = fps;
-    this.millisPerServerFrame = parseInt(1000 / this.serverFps);
-    this._tooLongSinceLastFrameDiffReceivedThreshold = (this.millisPerServerFrame << 6);
-  }
-
-  this._lastFrameDiffRecvTime = null;
-  this._tooLongSinceLastFrameDiffReceived = function() {
-    if (undefined === this._lastFrameDiffRecvTime || null === this._lastFrameDiffRecvTime) return false;
-    return (this._tooLongSinceLastFrameDiffReceivedThreshold <= (Date.now() - this._lastFrameDiffRecvTime));
-  };
-
-  this._consecutiveALittleLongFrameDiffReceivedIntervalCount = 0;
-  this._consecutiveALittleLongFrameDiffReceivedIntervalCountThreshold = 120;
-
-  this.onNewFrameDiffReceived = function(frameDiff) {
-    var now = Date.now();
-    if (undefined !== this._lastFrameDiffRecvTime && null !== this._lastFrameDiffRecvTime) {
-      var intervalFromLastFrameDiff = (now - this._lastFrameDiffRecvTime);
-      if ((this.millisPerServerFrame << 5) < intervalFromLastFrameDiff) {
-        ++this._consecutiveALittleLongFrameDiffReceivedIntervalCount;
-        console.log('Medium delay, intervalFromLastFrameDiff is', intervalFromLastFrameDiff);
-      } else {
-        this._consecutiveALittleLongFrameDiffReceivedIntervalCount = 0;
-      }
-    }
-    this._lastFrameDiffRecvTime = now;
-  };
-
-  this._networkComplaintPrefix = "\nNetwork is not good >_<\n";
-
-  this.generateNetworkComplaint = function(excludeTypeConstantALittleLongFrameDiffReceivedInterval, excludeTypeTooLongSinceLastFrameDiffReceived) {
-    if (this.hasBattleStopped) return null;
-    var shouldComplain = false;
-    var ret = this._networkComplaintPrefix;
-    if (true != excludeTypeConstantALittleLongFrameDiffReceivedInterval && this._consecutiveALittleLongFrameDiffReceivedIntervalCountThreshold <= this._consecutiveALittleLongFrameDiffReceivedIntervalCount) {
-      this._consecutiveALittleLongFrameDiffReceivedIntervalCount = 0;
-      ret += "\nConstantly having a little long recv interval.\n";
-      shouldComplain = true;
-    }
-    if (true != excludeTypeTooLongSinceLastFrameDiffReceived && this._tooLongSinceLastFrameDiffReceived()) {
-      ret += "\nToo long since last received frameDiff.\n";
-      shouldComplain = true;
-    }
-    return (shouldComplain ? ret : null);
-  };
-
-  this.hasBattleStopped = false;
-  this.onBattleStopped = function() {
-    this.hasBattleStopped = true;
-  };
-
-  this.isClientSessionConnected = function() {
-    if (!window.game) return false;
-    if (!window.game.clientSession) return false;
-    return window.game.clientSession.connected; 
-  };
-}
-
-window.NetworkDoctor = NetworkDoctor;

frontend/assets/scenes/default_map.fire

@@ -78,19 +78,19 @@
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     "_components": [
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+        "__id__": 48
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+        "__id__": 50
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+        "__id__": 51
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@@ -158,7 +158,7 @@
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       },
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@@ -247,10 +247,10 @@
       "__uuid__": "670b477e-61a1-4778-879b-35913f7c79d2"
     },
     "boundRoomIdLabel": {
-      "__id__": 16
+      "__id__": 24
     },
     "countdownLabel": {
-      "__id__": 23
+      "__id__": 31
     },
     "resultPanelPrefab": {
       "__uuid__": "c4cfe3bd-c59e-4d5b-95cb-c933b120e184"
@@ -269,9 +269,18 @@
     },
     "forceBigEndianFloatingNumDecoding": false,
     "renderFrameIdLagTolerance": 4,
-    "jigglingEps1D": 0.001,
+    "sendingQLabel": {
-    "bulletTriggerEnabled": true,
+      "__id__": 13
-    "closeOnForcedtoResyncNotSelf": true,
+    },
+    "inputFrameDownsyncQLabel": {
+      "__id__": 15
+    },
+    "peerInputFrameUpsyncQLabel": {
+      "__id__": 17
+    },
+    "rollbackFramesLabel": {
+      "__id__": 19
+    },
     "_id": "d12gkAmppNlIzqcRDELa91"
   },
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@@ -283,13 +292,13 @@
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     "_active": true,
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@@ -352,19 +361,19 @@
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     "_active": true,
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     "_active": true,
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+    "_name": "",
+    "_objFlags": 0,
+    "node": {
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+      }
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+    "_useOriginalSize": false,
+    "_string": "0",
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+    "_lineHeight": 23,
+    "_enableWrapText": true,
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+    "_spacingX": 0,
+    "_batchAsBitmap": false,
+    "_N$horizontalAlign": 0,
+    "_N$verticalAlign": 1,
+    "_N$fontFamily": "Arial",
+    "_N$overflow": 0,
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+    "_id": "77aNARt1VATLsjIzwbqvkh"
+  },
   {
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     "_name": "RoomIdIndicator",
@@ -664,19 +1053,19 @@
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     "_children": [
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+        "__id__": 21
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+        "__id__": 23
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     "_active": false,
     "_components": [
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+        "__id__": 25
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+        "__id__": 26
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     "_prefab": null,
@@ -732,13 +1121,13 @@
     "_name": "label",
     "_objFlags": 0,
     "_parent": {
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+      "__id__": 20
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     "_children": [],
     "_active": true,
     "_components": [
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+        "__id__": 22
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@@ -794,7 +1183,7 @@
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@@ -822,13 +1211,13 @@
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     "_objFlags": 0,
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+      "__id__": 20
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     "_active": true,
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     "_layoutSize": {
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@@ -1067,7 +1456,7 @@
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@@ -1157,7 +1546,7 @@
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     "_active": true,
@@ -1215,16 +1604,16 @@
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     "_objFlags": 0,
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     "_active": true,
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@@ -1345,7 +1734,7 @@
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@@ -1403,16 +1792,16 @@
     "_name": "Background",
     "_objFlags": 0,
     "_parent": {
-      "__id__": 28
+      "__id__": 36
     },
     "_children": [],
     "_active": true,
     "_components": [
       {
-        "__id__": 30
+        "__id__": 38
       },
       {
-        "__id__": 31
+        "__id__": 39
       }
     ],
     "_prefab": null,
@@ -1468,7 +1857,7 @@
     "_name": "",
     "_objFlags": 0,
     "node": {
-      "__id__": 29
+      "__id__": 37
     },
     "_enabled": true,
     "_materials": [
@@ -1502,7 +1891,7 @@
     "_name": "",
     "_objFlags": 0,
     "node": {
-      "__id__": 29
+      "__id__": 37
     },
     "_enabled": true,
     "alignMode": 0,
@@ -1560,16 +1949,16 @@
     },
     "_children": [
       {
-        "__id__": 34
+        "__id__": 42
       }
     ],
     "_active": true,
     "_components": [
       {
-        "__id__": 36
+        "__id__": 44
       },
       {
-        "__id__": 37
+        "__id__": 45
       }
     ],
     "_prefab": null,
@@ -1625,13 +2014,13 @@
     "_name": "Joystick",
     "_objFlags": 0,
     "_parent": {
-      "__id__": 33
+      "__id__": 41
     },
     "_children": [],
     "_active": true,
     "_components": [
       {
-        "__id__": 35
+        "__id__": 43
       }
     ],
     "_prefab": null,
@@ -1687,7 +2076,7 @@
     "_name": "",
     "_objFlags": 0,
     "node": {
-      "__id__": 34
+      "__id__": 42
     },
     "_enabled": true,
     "_materials": [
@@ -1721,7 +2110,7 @@
     "_name": "",
     "_objFlags": 0,
     "node": {
-      "__id__": 33
+      "__id__": 41
     },
     "_enabled": true,
     "_materials": [
@@ -1755,7 +2144,7 @@
     "_name": "",
     "_objFlags": 0,
     "node": {
-      "__id__": 33
+      "__id__": 41
     },
     "_enabled": true,
     "alignMode": 0,
@@ -1908,10 +2297,10 @@
       "__id__": 3
     },
     "stickhead": {
-      "__id__": 34
+      "__id__": 42
     },
     "base": {
-      "__id__": 33
+      "__id__": 41
     },
     "joyStickEps": 0.1,
     "magicLeanLowerBound": 0.414,
@@ -1932,10 +2321,10 @@
     "linearMovingEps": 0.1,
     "scaleByEps": 0.0375,
     "btnA": {
-      "__id__": 24
+      "__id__": 32
     },
     "btnB": {
-      "__id__": 28
+      "__id__": 36
     },
     "_id": "e9oVYTr7ROlpp/IrNjBUmR"
   }

frontend/assets/scenes/login.fire

@@ -362,7 +362,7 @@
       "array": [
         0,
         0,
-        210.43934936178934,
+        216.50635094610968,
         0,
         0,
         0,

frontend/assets/scripts/Map.js

@@ -2,6 +2,7 @@ const i18n = require('LanguageData');
 i18n.init(window.language); // languageID should be equal to the one we input in New Language ID input field
 
 const RingBuffer = require('./RingBuffer');
+const NetworkDoctor = require('./NetworkDoctor');
 const PriorityQueue = require("./PriorityQueue");
 
 window.ALL_MAP_STATES = {
@@ -96,15 +97,21 @@ cc.Class({
       type: cc.Integer,
       default: 4 // implies (renderFrameIdLagTolerance >> inputScaleFrames) count of inputFrameIds
     },
-    jigglingEps1D: {
+    sendingQLabel: {
-      type: cc.Float,
+      type: cc.Label,
-      default: 1e-3
+      default: null
     },
-    bulletTriggerEnabled: {
+    inputFrameDownsyncQLabel: {
-      default: false
+      type: cc.Label,
+      default: null
     },
-    closeOnForcedtoResyncNotSelf: {
+    peerInputFrameUpsyncQLabel: {
-      default: true
+      type: cc.Label,
+      default: null
+    },
+    rollbackFramesLabel: {
+      type: cc.Label,
+      default: null
     },
   },
 
@@ -184,6 +191,7 @@ cc.Class({
       // Upon resync, "self.lastUpsyncInputFrameId" might not have been updated properly.
       batchInputFrameIdSt = self.recentInputCache.StFrameId;
     }
+    self.networkDoctor.logSending(batchInputFrameIdSt, latestLocalInputFrameId);
     for (let i = batchInputFrameIdSt; i <= latestLocalInputFrameId; ++i) {
       const inputFrameDownsync = self.recentInputCache.GetByFrameId(i);
       if (null == inputFrameDownsync) {
@@ -342,6 +350,8 @@ cc.Class({
     self.othersForcedDownsyncRenderFrameDict = new Map();
     self.rdfIdToActuallyUsedInput = new Map();
 
+    self.networkDoctor = new NetworkDoctor(20);
+
     self.countdownNanos = null;
     if (self.countdownLabel) {
       self.countdownLabel.string = "";
@@ -409,6 +419,7 @@ cc.Class({
   },
 
   onLoad() {
+    cc.game.setFrameRate(60);
     cc.view.setOrientation(cc.macro.ORIENTATION_LANDSCAPE);
     cc.view.enableAutoFullScreen(true);
 
@@ -417,6 +428,7 @@ cc.Class({
     window.forceBigEndianFloatingNumDecoding = self.forceBigEndianFloatingNumDecoding;
 
     self.showCriticalCoordinateLabels = false;
+    self.showNetworkDoctorInfo = true;
 
     console.warn("+++++++ Map onLoad()");
 
@@ -796,6 +808,7 @@ cc.Class({
       return;
     }
 
+    self.networkDoctor.logInputFrameDownsync(batch[0].inputFrameId, batch[batch.length - 1].inputFrameId);
     let firstPredictedYetIncorrectInputFrameId = null;
     for (let k in batch) {
       const inputFrameDownsync = batch[k];
@@ -839,6 +852,7 @@ cc.Class({
     --------------------------------------------------------
     */
     // The actual rollback-and-chase would later be executed in update(dt). 
+    self.networkDoctor.immediateRollbackFrames = (self.renderFrameId - renderFrameId1);
     console.log(`Mismatched input detected, resetting chaserRenderFrameId: ${self.chaserRenderFrameId}->${renderFrameId1} by firstPredictedYetIncorrectInputFrameId: ${firstPredictedYetIncorrectInputFrameId}
 lastAllConfirmedInputFrameId=${self.lastAllConfirmedInputFrameId}
 recentInputCache=${self._stringifyRecentInputCache(false)}
@@ -860,6 +874,7 @@ batchInputFrameIdRange=[${batch[0].inputFrameId}, ${batch[batch.length - 1].inpu
       return;
     }
 
+    self.networkDoctor.logPeerInputFrameUpsync(batch[0].inputFrameId, batch[batch.length - 1].inputFrameId);
     //console.log(`Received peer inputFrameUpsync batch w/ inputFrameId in [${batch[0].inputFrameId}, ${batch[batch.length - 1].inputFrameId}] for prediction assistance`);
     for (let k in batch) {
       const inputFrameDownsync = batch[k];
@@ -1005,6 +1020,9 @@ othersForcedDownsyncRenderFrame=${JSON.stringify(othersForcedDownsyncRenderFrame
         }
         self.applyRoomDownsyncFrameDynamics(rdf, prevRdf);
         self.showDebugBoundaries(rdf);
+        if (self.showNetworkDoctorInfo) {
+          self.showNetworkDoctorLabels();
+        }
         ++self.renderFrameId; // [WARNING] It's important to increment the renderFrameId AFTER all the operations above!!!
         self.lastRenderFrameIdTriggeredAt = performance.now();
         let t3 = performance.now();
@@ -1499,4 +1517,12 @@ actuallyUsedinputList:{${self.inputFrameDownsyncStr(actuallyUsedInputClone)}}`);
       }
     }
   },
+
+  showNetworkDoctorLabels() {
+    const self = this;
+    self.sendingQLabel.string = self.networkDoctor.statSending();
+    self.inputFrameDownsyncQLabel.string = self.networkDoctor.statInputFrameDownsync();
+    self.peerInputFrameUpsyncQLabel.string = self.networkDoctor.statPeerInputFrameUpsync();
+    self.rollbackFramesLabel.string = self.networkDoctor.statRollbackFrames();
+  },
 });

frontend/assets/scripts/NetworkDoctor.js

@@ -0,0 +1,74 @@
+const RingBuffer = require('./RingBuffer');
+
+var NetworkDoctor = function(capacity) {
+  this.reset(capacity);
+};
+
+NetworkDoctor.prototype.reset = function(capacity) {
+  this.sendingQ = new RingBuffer(capacity);
+  this.inputFrameDownsyncQ = new RingBuffer(capacity);
+  this.peerInputFrameUpsyncQ = new RingBuffer(capacity);
+  this.peerInputFrameUpsyncCnt = 0;
+  this.immediateRollbackFrames = 0;
+};
+
+NetworkDoctor.prototype.logSending = function(stFrameId, edFrameId) {
+  this.sendingQ.put({
+    i: stFrameId,
+    j: edFrameId,
+    t: Date.now()
+  });
+};
+
+NetworkDoctor.prototype.logInputFrameDownsync = function(stFrameId, edFrameId) {
+  this.inputFrameDownsyncQ.put({
+    i: stFrameId,
+    j: edFrameId,
+    t: Date.now()
+  });
+};
+
+NetworkDoctor.prototype.logPeerInputFrameUpsync = function(stFrameId, edFrameId) {
+  const firstPopped = this.peerInputFrameUpsyncQ.put({
+    i: stFrameId,
+    j: edFrameId,
+    t: Date.now()
+  });
+  if (null != firstPopped) {
+    this.peerInputFrameUpsyncCnt -= (firstPopped.j - firstPopped.i + 1);
+  }
+  this.peerInputFrameUpsyncCnt += (edFrameId - stFrameId + 1);
+};
+
+NetworkDoctor.prototype.statSending = function() {
+  if (1 >= this.sendingQ.cnt) return `0 fps sending`;
+  const st = this.sendingQ.getByFrameId(this.sendingQ.stFrameId);
+  const ed = this.sendingQ.getByFrameId(this.sendingQ.edFrameId - 1);
+  const elapsedMillis = ed.t - st.t;
+  const fps = Math.round((ed.j - st.i) * 1000 / elapsedMillis);
+  return `${fps} fps sending`;
+};
+
+NetworkDoctor.prototype.statInputFrameDownsync = function() {
+  if (1 >= this.inputFrameDownsyncQ.cnt) return `0 fps srv downsync`;
+  const st = this.inputFrameDownsyncQ.getByFrameId(this.inputFrameDownsyncQ.stFrameId);
+  const ed = this.inputFrameDownsyncQ.getByFrameId(this.inputFrameDownsyncQ.edFrameId - 1);
+  const elapsedMillis = ed.t - st.t;
+  const fps = Math.round((ed.j - st.i) * 1000 / elapsedMillis);
+  return `${fps} fps srv downsync`;
+};
+
+NetworkDoctor.prototype.statPeerInputFrameUpsync = function() {
+  if (1 >= this.peerInputFrameUpsyncQ.cnt) return `0 fps peer upsync`;
+  const st = this.peerInputFrameUpsyncQ.getByFrameId(this.peerInputFrameUpsyncQ.stFrameId);
+  const ed = this.peerInputFrameUpsyncQ.getByFrameId(this.peerInputFrameUpsyncQ.edFrameId - 1);
+  const elapsedMillis = ed.t - st.t;
+  const fps = Math.round(this.peerInputFrameUpsyncCnt * 1000 / elapsedMillis);
+  return `${fps} fps peer upsync`;
+};
+
+NetworkDoctor.prototype.statRollbackFrames = function() {
+  return `${this.immediateRollbackFrames} rollback frames`;
+};
+
+module.exports = NetworkDoctor;

frontend/assets/scripts/NetworkDoctor.js.meta

@@ -1,6 +1,6 @@
 {
   "ver": "1.0.5",
-  "uuid": "477c07c3-0d50-4d55-96f0-6eaf9f25e2da",
+  "uuid": "affd726a-02f0-4079-aace-39fe525d7478",
   "isPlugin": false,
   "loadPluginInWeb": true,
   "loadPluginInNative": true,

frontend/assets/scripts/OfflineMap.js

@@ -11,11 +11,13 @@ cc.Class({
   },
 
   onLoad() {
+    cc.game.setFrameRate(60);
     cc.view.setOrientation(cc.macro.ORIENTATION_LANDSCAPE);
     cc.view.enableAutoFullScreen(true);
     const self = this;
     window.mapIns = self;
     self.showCriticalCoordinateLabels = false;
+    self.showNetworkDoctorInfo = true;
 
     const mapNode = self.node;
     const canvasNode = mapNode.parent;

frontend/assets/scripts/RingBuffer.js

@@ -13,9 +13,12 @@ var RingBuffer = function(capacity) {
 };
 
 RingBuffer.prototype.put = function(item) {
+  let firstPopped = null;
   while (0 < this.cnt && this.cnt >= this.n) {
     // Make room for the new element
-    this.pop();
+    const popped = this.pop();
+    if (null == firstPopped)
+      firstPopped = popped;
   }
   this.eles[this.ed] = item
   this.edFrameId++;
@@ -24,6 +27,7 @@ RingBuffer.prototype.put = function(item) {
   if (this.ed >= this.n) {
     this.ed -= this.n; // Deliberately not using "%" operator for performance concern
   }
+  return firstPopped;
 };
 
 RingBuffer.prototype.pop = function() {