Added necessary js type exposure to jsexport.

battle_srv/models/room.go

@@ -1401,8 +1401,7 @@ func (pR *Room) applyInputFrameDownsyncDynamicsOnSingleRenderFrame(delayedInputF
 			}
 			offenderWx, offenderWy := VirtualGridToWorldPos(offender.VirtualGridX, offender.VirtualGridY, pR.VirtualGridToWorldRatio)
 			bulletWx, bulletWy := offenderWx+xfac*meleeBullet.HitboxOffset, offenderWy
-			newBulletCollider := GenerateRectCollider(bulletWx, bulletWy, meleeBullet.HitboxSize.X, meleeBullet.HitboxSize.Y, topPadding, bottomPadding, leftPadding, rightPadding, pR.collisionSpaceOffsetX, pR.collisionSpaceOffsetY, "MeleeBullet")
+			newBulletCollider := GenerateRectCollider(bulletWx, bulletWy, meleeBullet.HitboxSize.X, meleeBullet.HitboxSize.Y, topPadding, bottomPadding, leftPadding, rightPadding, pR.collisionSpaceOffsetX, pR.collisionSpaceOffsetY, meleeBullet, "MeleeBullet")
-			newBulletCollider.Data = meleeBullet
 			pR.Space.Add(newBulletCollider)
 			collisionSysMap[collisionBulletIndex] = newBulletCollider
 			bulletColliders[collisionBulletIndex] = newBulletCollider
@@ -1625,8 +1624,7 @@ func (pR *Room) refreshColliders(spaceW, spaceH int32) {
 	for _, player := range pR.Players {
 		wx, wy := VirtualGridToWorldPos(player.VirtualGridX, player.VirtualGridY, pR.VirtualGridToWorldRatio)
 		colliderWidth, colliderHeight := player.ColliderRadius*2, player.ColliderRadius*4
-		playerCollider := GenerateRectCollider(wx, wy, colliderWidth, colliderHeight, topPadding, bottomPadding, leftPadding, rightPadding, pR.collisionSpaceOffsetX, pR.collisionSpaceOffsetY, "Player") // the coords of all barrier boundaries are multiples of tileWidth(i.e. 16), by adding snapping y-padding when "landedOnGravityPushback" all "playerCollider.Y" would be a multiple of 1.0
+		playerCollider := GenerateRectCollider(wx, wy, colliderWidth, colliderHeight, topPadding, bottomPadding, leftPadding, rightPadding, pR.collisionSpaceOffsetX, pR.collisionSpaceOffsetY, player, "Player") // the coords of all barrier boundaries are multiples of tileWidth(i.e. 16), by adding snapping y-padding when "landedOnGravityPushback" all "playerCollider.Y" would be a multiple of 1.0
-		playerCollider.Data = player
 		pR.Space.Add(playerCollider)
 		// Keep track of the collider in "pR.CollisionSysMap"
 		joinIndex := player.JoinIndex
@@ -1637,8 +1635,7 @@ func (pR *Room) refreshColliders(spaceW, spaceH int32) {
 
 	for _, barrier := range pR.Barriers {
 		boundaryUnaligned := barrier.Boundary
-		barrierCollider := GenerateConvexPolygonCollider(boundaryUnaligned, pR.collisionSpaceOffsetX, pR.collisionSpaceOffsetY, "Barrier")
+		barrierCollider := GenerateConvexPolygonCollider(boundaryUnaligned, pR.collisionSpaceOffsetX, pR.collisionSpaceOffsetY, barrier, "Barrier")
-		barrierCollider.Data = barrier
 		pR.Space.Add(barrierCollider)
 	}
 }

collider_visualizer/worldColliderDisplay.go

@@ -45,7 +45,7 @@ func NewWorldColliderDisplay(game *Game, stageDiscreteW, stageDiscreteH, stageTi
 	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"
+		playerCollider := GenerateRectCollider(playerPos.X, playerPos.Y, colliderWidth, colliderHeight, topPadding, bottomPadding, leftPadding, rightPadding, spaceOffsetX, spaceOffsetY, nil, "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)
@@ -53,7 +53,7 @@ func NewWorldColliderDisplay(game *Game, stageDiscreteW, stageDiscreteH, stageTi
 
 	barrierLocalId := 0
 	for _, barrierUnaligned := range barrierList.Eles {
-		barrierCollider := GenerateConvexPolygonCollider(barrierUnaligned, spaceOffsetX, spaceOffsetY, "Barrier")
+		barrierCollider := GenerateConvexPolygonCollider(barrierUnaligned, spaceOffsetX, spaceOffsetY, nil, "Barrier")
 		Logger.Debug(fmt.Sprintf("Added barrier: shape=%v", ConvexPolygonStr(barrierCollider.Shape.(*resolv.ConvexPolygon))))
 		space.Add(barrierCollider)
 		barrierLocalId++
@@ -122,7 +122,7 @@ func NewWorldColliderDisplay(game *Game, stageDiscreteW, stageDiscreteH, stageTi
 		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")
+		newBulletCollider := GenerateRectCollider(bulletWx, bulletWy, meleeBullet.HitboxSize.X, meleeBullet.HitboxSize.Y, topPadding, bottomPadding, leftPadding, rightPadding, spaceOffsetX, spaceOffsetY, nil, "MeleeBullet")
 		space.Add(newBulletCollider)
 		bulletShape := newBulletCollider.Shape.(*resolv.ConvexPolygon)
 		Logger.Warn(fmt.Sprintf("bullet ->: Added bullet collider to space: a=%v", ConvexPolygonStr(bulletShape)))
@@ -145,7 +145,7 @@ func NewWorldColliderDisplay(game *Game, stageDiscreteW, stageDiscreteH, stageTi
 		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")
+		newBulletCollider := GenerateRectCollider(bulletWx, bulletWy, meleeBullet.HitboxSize.X, meleeBullet.HitboxSize.Y, topPadding, bottomPadding, leftPadding, rightPadding, spaceOffsetX, spaceOffsetY, nil, "MeleeBullet")
 		space.Add(newBulletCollider)
 		bulletShape := newBulletCollider.Shape.(*resolv.ConvexPolygon)
 		Logger.Warn(fmt.Sprintf("bullet <-: Added bullet collider to space: a=%v", ConvexPolygonStr(bulletShape)))

dnmshared/resolv_helper.go

@@ -22,19 +22,20 @@ func RectCenterStr(body *resolv.Object, halfBoundingW, halfBoundingH, topPadding
 	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 {
+func GenerateRectCollider(wx, wy, w, h, topPadding, bottomPadding, leftPadding, rightPadding, spaceOffsetX, spaceOffsetY float64, data interface{}, 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)
+	return generateRectColliderInCollisionSpace(blX, blY, leftPadding+w+rightPadding, bottomPadding+h+topPadding, data, tag)
 }
 
-func generateRectColliderInCollisionSpace(blX, blY, w, h float64, tag string) *resolv.Object {
+func generateRectColliderInCollisionSpace(blX, blY, w, h float64, data interface{}, 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)
+    collider.Data = data 
 	return collider
 }
 
-func GenerateConvexPolygonCollider(unalignedSrc *Polygon2D, spaceOffsetX, spaceOffsetY float64, tag string) *resolv.Object {
+func GenerateConvexPolygonCollider(unalignedSrc *Polygon2D, spaceOffsetX, spaceOffsetY float64, data interface{}, tag string) *resolv.Object {
 	aligned := AlignPolygon2DToBoundingBox(unalignedSrc)
 	var w, h float64 = 0, 0
 
@@ -60,6 +61,7 @@ func GenerateConvexPolygonCollider(unalignedSrc *Polygon2D, spaceOffsetX, spaceO
 
 	collider := resolv.NewObject(aligned.Anchor.X+spaceOffsetX, aligned.Anchor.Y+spaceOffsetY, w, h, tag)
 	collider.SetShape(shape)
+    collider.Data = data
 
 	return collider
 }

dnmshared/ringbuf.go

@@ -1,5 +1,11 @@
 package dnmshared
 
+const (
+	RING_BUFF_CONSECUTIVE_SET     = int32(0)
+	RING_BUFF_NON_CONSECUTIVE_SET = int32(1)
+	RING_BUFF_FAILED_TO_SET       = int32(2)
+)
+
 type RingBuffer struct {
 	Ed        int32 // write index, open index
 	St        int32 // read index, closed index
@@ -48,15 +54,15 @@ func (rb *RingBuffer) Pop() interface{} {
 	return pItem
 }
 
-func (rb *RingBuffer) GetByOffset(offsetFromSt int32) interface{} {
+func (rb *RingBuffer) GetArrIdxByOffset(offsetFromSt int32) int32 {
-	if 0 == rb.Cnt {
+	if 0 == rb.Cnt || 0 > offsetFromSt {
-		return nil
+		return -1
 	}
 	arrIdx := rb.St + offsetFromSt
 	if rb.St < rb.Ed {
 		// case#1: 0...st...ed...N-1
 		if rb.St <= arrIdx && arrIdx < rb.Ed {
-			return rb.Eles[arrIdx]
+			return arrIdx
 		}
 	} else {
 		// if rb.St >= rb.Ed
@@ -65,11 +71,19 @@ func (rb *RingBuffer) GetByOffset(offsetFromSt int32) interface{} {
 			arrIdx -= rb.N
 		}
 		if arrIdx >= rb.St || arrIdx < rb.Ed {
-			return rb.Eles[arrIdx]
+			return arrIdx
 		}
 	}
 
+	return -1
+}
+
+func (rb *RingBuffer) GetByOffset(offsetFromSt int32) interface{} {
+	arrIdx := rb.GetArrIdxByOffset(offsetFromSt)
+	if -1 == arrIdx {
 		return nil
+	}
+	return rb.Eles[arrIdx]
 }
 
 func (rb *RingBuffer) GetByFrameId(frameId int32) interface{} {
@@ -78,3 +92,33 @@ func (rb *RingBuffer) GetByFrameId(frameId int32) interface{} {
 	}
 	return rb.GetByOffset(frameId - rb.StFrameId)
 }
+
+// [WARNING] During a battle, frontend could receive non-consecutive frames (either renderFrame or inputFrame) due to resync, the buffer should handle these frames properly.
+func (rb *RingBuffer) SetByFrameId(pItem interface{}, frameId int32) (int32, int32, int32) {
+	oldStFrameId, oldEdFrameId := rb.StFrameId, rb.EdFrameId
+	if frameId < oldStFrameId {
+		return RING_BUFF_FAILED_TO_SET, oldStFrameId, oldEdFrameId
+	}
+	// By now "rb.StFrameId <= frameId"
+	if oldEdFrameId > frameId {
+		arrIdx := rb.GetArrIdxByOffset(frameId - rb.StFrameId)
+		if -1 != arrIdx {
+			rb.Eles[arrIdx] = pItem
+			return RING_BUFF_CONSECUTIVE_SET, oldStFrameId, oldEdFrameId
+		}
+	}
+
+	// By now "rb.EdFrameId <= frameId"
+	ret := RING_BUFF_CONSECUTIVE_SET
+	if oldEdFrameId < frameId {
+		rb.St, rb.Ed = 0, 0
+		rb.StFrameId, rb.EdFrameId = frameId, frameId
+		rb.Cnt = 0
+		ret = RING_BUFF_NON_CONSECUTIVE_SET
+	}
+
+	// By now "rb.EdFrameId == frameId"
+	rb.Put(pItem)
+
+	return ret, oldStFrameId, oldEdFrameId
+}

frontend/assets/scenes/login.fire

@@ -440,7 +440,7 @@
       "array": [
         0,
         0,
-        209.73151519075364,
+        215.95961841836203,
         0,
         0,
         0,

frontend/assets/scenes/offline_map_2.fire.meta

@@ -0,0 +1,7 @@
+{
+  "ver": "1.2.5",
+  "uuid": "8491a86c-bec9-4813-968a-128ca01639e0",
+  "asyncLoadAssets": false,
+  "autoReleaseAssets": false,
+  "subMetas": {}
+}

frontend/assets/scripts/OfflineMapBackend.js

@@ -0,0 +1,238 @@
+const i18n = require('LanguageData');
+i18n.init(window.language); // languageID should be equal to the one we input in New Language ID input field
+
+const OnlineMap = require('./Map');
+
+cc.Class({
+  extends: OnlineMap,
+
+  onDestroy() {
+    console.warn("+++++++ Map onDestroy()");
+  },
+
+  onLoad() {
+    const self = this;
+    window.mapIns = self;
+    self.showCriticalCoordinateLabels = true;
+
+    const mapNode = self.node;
+    const canvasNode = mapNode.parent;
+
+    self.mainCameraNode = self.canvasNode.getChildByName("Main Camera");
+    self.mainCamera = self.mainCameraNode.getComponent(cc.Camera);
+    for (let child of self.mainCameraNode.children) {
+      child.setScale(1 / self.mainCamera.zoomRatio);
+    }
+    self.widgetsAboveAllNode = self.mainCameraNode.getChildByName("WidgetsAboveAll");
+    self.mainCameraNode.setPosition(cc.v2());
+
+    /** Init required prefab ended. */
+
+    self.inputDelayFrames = 8;
+    self.inputScaleFrames = 2;
+    self.inputFrameUpsyncDelayTolerance = 2;
+
+    self.renderCacheSize = 1024;
+    self.serverFps = 60;
+    self.rollbackEstimatedDt = 0.016667;
+    self.rollbackEstimatedDtMillis = 16.667;
+    self.rollbackEstimatedDtNanos = 16666666;
+    self.tooFastDtIntervalMillis = 0.5 * self.rollbackEstimatedDtMillis;
+
+    self.worldToVirtualGridRatio = 1000;
+    self.virtualGridToWorldRatio = 1.0 / self.worldToVirtualGridRatio;
+    self.meleeSkillConfig = {
+      1: {
+        // for offender
+        startupFrames: 10,
+        activeFrames: 20,
+        recoveryFrames: 34, // usually but not always "startupFrames+activeFrames", I hereby set it to be 1 frame more than the actual animation to avoid critical transition, i.e. when the animation is 1 frame from ending but "rdfPlayer.framesToRecover" is already counted 0 and the player triggers an other same attack, making an effective bullet trigger but no animation is played due to same animName is still playing
+        recoveryFramesOnBlock: 34,
+        recoveryFramesOnHit: 34,
+        moveforward: {
+          x: 0,
+          y: 0,
+        },
+        hitboxOffset: 12.0, // should be about the radius of the PlayerCollider 
+        hitboxSize: {
+          x: 23.0,
+          y: 32.0,
+        },
+
+        // for defender
+        hitStunFrames: 18,
+        blockStunFrames: 9,
+        pushback: 8.0,
+        releaseTriggerType: 1, // 1: rising-edge, 2: falling-edge  
+        damage: 5
+      }
+    };
+
+    /* 
+    [WARNING] As when a character is standing on a barrier, if not carefully curated there MIGHT BE a bouncing sequence of "[(inAir -> dropIntoBarrier ->), (notInAir -> pushedOutOfBarrier ->)], [(inAir -> ..."
+
+    Moreover, "snapIntoPlatformOverlap" should be small enough such that the walking "velX" or jumping initial "velY" can escape from it by 1 renderFrame (when jumping is triggered, the character is waived from snappig for 1 renderFrame).
+    */
+    self.snapIntoPlatformOverlap = 0.1;
+    self.snapIntoPlatformThreshold = 0.5; // a platform must be "horizontal enough" for a character to "stand on"
+    self.jumpingInitVelY = 7 * self.worldToVirtualGridRatio; // unit: (virtual grid length/renderFrame)
+    [self.gravityX, self.gravityY] = [0, -0.5*self.worldToVirtualGridRatio]; // unit: (virtual grid length/renderFrame^2)
+
+    const tiledMapIns = self.node.getComponent(cc.TiledMap);
+
+    const fullPathOfTmxFile = cc.js.formatStr("map/%s/map", "dungeon");
+    cc.loader.loadRes(fullPathOfTmxFile, cc.TiledMapAsset, (err, tmxAsset) => {
+      if (null != err) {
+        console.error(err);
+        return;
+      }
+
+      tiledMapIns.tmxAsset = null;
+      mapNode.removeAllChildren();
+      self._resetCurrentMatch();
+
+      if (self.showCriticalCoordinateLabels) {
+        const drawer = new cc.Node();
+        drawer.setPosition(cc.v2(0, 0))
+        safelyAddChild(self.node, drawer);
+        setLocalZOrder(drawer, 999);
+        const g = drawer.addComponent(cc.Graphics);
+        g.lineWidth = 2;
+        self.g = g;
+      }
+
+
+      tiledMapIns.tmxAsset = tmxAsset;
+      const newMapSize = tiledMapIns.getMapSize();
+      const newTileSize = tiledMapIns.getTileSize();
+      self.node.setContentSize(newMapSize.width * newTileSize.width, newMapSize.height * newTileSize.height);
+      self.node.setPosition(cc.v2(0, 0));
+
+      let barrierIdCounter = 0;
+      const boundaryObjs = tileCollisionManager.extractBoundaryObjects(self.node);
+      for (let boundaryObj of boundaryObjs.barriers) {
+        const x0 = boundaryObj.anchor.x,
+          y0 = boundaryObj.anchor.y;
+
+        const newBarrier = self.collisionSys.createPolygon(x0, y0, Array.from(boundaryObj, p => {
+          return [p.x, p.y];
+        }));
+        newBarrier.data = {
+          hardPushback: true
+        };
+
+        if (false && self.showCriticalCoordinateLabels) {
+          for (let i = 0; i < boundaryObj.length; ++i) {
+            const barrierVertLabelNode = new cc.Node();
+            switch (i % 4) {
+              case 0:
+                barrierVertLabelNode.color = cc.Color.RED;
+                break;
+              case 1:
+                barrierVertLabelNode.color = cc.Color.GRAY;
+                break;
+              case 2:
+                barrierVertLabelNode.color = cc.Color.BLACK;
+                break;
+              default:
+                barrierVertLabelNode.color = cc.Color.MAGENTA;
+                break;
+            }
+            const wx = boundaryObj.anchor.x + boundaryObj[i].x,
+              wy = boundaryObj.anchor.y + boundaryObj[i].y;
+            barrierVertLabelNode.setPosition(cc.v2(wx, wy));
+            const barrierVertLabel = barrierVertLabelNode.addComponent(cc.Label);
+            barrierVertLabel.fontSize = 12;
+            barrierVertLabel.lineHeight = barrierVertLabel.fontSize + 1;
+            barrierVertLabel.string = `(${wx.toFixed(1)}, ${wy.toFixed(1)})`;
+            safelyAddChild(self.node, barrierVertLabelNode);
+            setLocalZOrder(barrierVertLabelNode, 5);
+
+            barrierVertLabelNode.active = true;
+          }
+
+        }
+        // console.log("Created barrier: ", newBarrier);
+        ++barrierIdCounter;
+        const collisionBarrierIndex = (self.collisionBarrierIndexPrefix + barrierIdCounter);
+        self.collisionSysMap.set(collisionBarrierIndex, newBarrier);
+      }
+
+      const startRdf = window.pb.protos.RoomDownsyncFrame.create({
+        id: window.MAGIC_ROOM_DOWNSYNC_FRAME_ID.BATTLE_START,
+        players: {
+          10: window.pb.protos.PlayerDownsync.create({
+            id: 10,
+            joinIndex: 1,
+            virtualGridX: self.worldToVirtualGridPos(boundaryObjs.playerStartingPositions[0].x, boundaryObjs.playerStartingPositions[0].y)[0],
+            virtualGridY: self.worldToVirtualGridPos(boundaryObjs.playerStartingPositions[0].x, boundaryObjs.playerStartingPositions[0].y)[1],
+            speed: 1 * self.worldToVirtualGridRatio,
+            colliderRadius: 12,
+            characterState: window.ATK_CHARACTER_STATE.InAirIdle1[0],
+            framesToRecover: 0,
+            dirX: 0,
+            dirY: 0,
+            velX: 0,
+            velY: 0,
+            inAir: true,
+          }),
+          11: window.pb.protos.PlayerDownsync.create({
+            id: 11,
+            joinIndex: 2,
+            virtualGridX: self.worldToVirtualGridPos(boundaryObjs.playerStartingPositions[1].x, boundaryObjs.playerStartingPositions[1].y)[0],
+            virtualGridY: self.worldToVirtualGridPos(boundaryObjs.playerStartingPositions[1].x, boundaryObjs.playerStartingPositions[1].y)[1],
+            speed: 1 * self.worldToVirtualGridRatio,
+            colliderRadius: 12,
+            characterState: window.ATK_CHARACTER_STATE.InAirIdle1[0],
+            framesToRecover: 0,
+            dirX: 0,
+            dirY: 0,
+            velX: 0,
+            velY: 0,
+            inAir: true,
+          }),
+        }
+      });
+      self.selfPlayerInfo = {
+        id: 11
+      };
+      self._initPlayerRichInfoDict(startRdf.players);
+      self.onRoomDownsyncFrame(startRdf);
+
+      self.battleState = ALL_BATTLE_STATES.IN_BATTLE;
+    });
+
+  },
+
+  update(dt) {
+    const self = this;
+    if (ALL_BATTLE_STATES.IN_BATTLE == self.battleState) {
+      const elapsedMillisSinceLastFrameIdTriggered = performance.now() - self.lastRenderFrameIdTriggeredAt;
+      if (elapsedMillisSinceLastFrameIdTriggered < self.tooFastDtIntervalMillis) {
+        // [WARNING] We should avoid a frontend ticking too fast to prevent cheating, as well as ticking too slow to cause a "resync avalanche" that impacts user experience!
+        // console.debug("Avoiding too fast frame@renderFrameId=", self.renderFrameId, ": elapsedMillisSinceLastFrameIdTriggered=", elapsedMillisSinceLastFrameIdTriggered);
+        return;
+      }
+      try {
+        let st = performance.now();
+        let prevSelfInput = null,
+          currSelfInput = null;
+        const noDelayInputFrameId = self._convertToInputFrameId(self.renderFrameId, 0); // It's important that "inputDelayFrames == 0" here 
+        if (self.shouldGenerateInputFrameUpsync(self.renderFrameId)) {
+          const prevAndCurrInputs = self._generateInputFrameUpsync(noDelayInputFrameId);
+          prevSelfInput = prevAndCurrInputs[0];
+          currSelfInput = prevAndCurrInputs[1];
+        }
+
+        const [prevRdf, rdf] = self.rollbackAndChase(self.renderFrameId, self.renderFrameId + 1, self.collisionSys, self.collisionSysMap, false);
+        self.applyRoomDownsyncFrameDynamics(rdf, prevRdf);
+        self.showDebugBoundaries(rdf);
+        ++self.renderFrameId;
+        self.lastRenderFrameIdTriggeredAt = performance.now();
+        let t3 = performance.now();
+      } catch (err) {
+        console.error("Error during Map.update", err);
+      }
+    }
+  },
+});

frontend/assets/scripts/OfflineMapBackend.js.meta

@@ -0,0 +1,9 @@
+{
+  "ver": "1.0.5",
+  "uuid": "b3810903-496b-43d7-8461-898cee958548",
+  "isPlugin": false,
+  "loadPluginInWeb": true,
+  "loadPluginInNative": true,
+  "loadPluginInEditor": false,
+  "subMetas": {}
+}

jsexport/main.go

@@ -1,22 +1,67 @@
 package main
 
 import (
+	. "dnmshared"
+	. "dnmshared/sharedprotos"
 	"github.com/gopherjs/gopherjs/js"
 	"github.com/solarlune/resolv"
-    . "jsexport/protos"
 	"jsexport/models"
-    . "dnmshared"
+	. "jsexport/protos"
 )
 
-func NewRingBufferJs(n int32) *js.Object {
-    return js.MakeWrapper(NewRingBuffer(n));
-}
-
 func NewCollisionSpaceJs(spaceW, spaceH, minStepW, minStepH int) *js.Object {
 	return js.MakeWrapper(resolv.NewSpace(spaceW, spaceH, minStepW, minStepH))
 }
 
-func GenerateRectColliderJs(wx, wy, w, h, topPadding, bottomPadding, leftPadding, rightPadding, spaceOffsetX, spaceOffsetY float64, tag string) *js.Object {
+func NewVec2DJs(x, y float64) *js.Object {
+	return js.MakeFullWrapper(&Vec2D{
+		X: x,
+		Y: y,
+	})
+}
+
+func NewPolygon2DJs(anchor *Vec2D, points []*Vec2D) *js.Object {
+	return js.MakeFullWrapper(&Polygon2D{
+		Anchor: anchor,
+		Points: points,
+	})
+}
+
+func NewBarrierJs(boundary *Polygon2D) *js.Object {
+	return js.MakeWrapper(&Barrier{
+		Boundary: boundary,
+	})
+}
+
+func NewPlayerDownsyncJs(id, virtualGridX, virtualGridY, dirX, dirY, velX, velY, speed, battleState, characterState, joinIndex, hp, maxHp int32, inAir bool, colliderRadius float64) *js.Object {
+	return js.MakeWrapper(&PlayerDownsync{
+		Id:             id,
+		VirtualGridX:   virtualGridX,
+		VirtualGridY:   virtualGridY,
+		DirX:           dirX,
+		DirY:           dirY,
+		VelX:           velX,
+		VelY:           velY,
+		Speed:          speed,
+		BattleState:    battleState,
+		JoinIndex:      joinIndex,
+		ColliderRadius: colliderRadius,
+		Hp:             hp,
+		MaxHp:          maxHp,
+		CharacterState: characterState,
+		InAir:          inAir,
+	})
+}
+
+func NewRoomDownsyncFrameJs(id int32, playersArr []*PlayerDownsync, meleeBullets []*MeleeBullet) *js.Object {
+	return js.MakeFullWrapper(&RoomDownsyncFrame{
+		Id:           id,
+		PlayersArr:   playersArr,
+		MeleeBullets: meleeBullets,
+	})
+}
+
+func GenerateRectColliderJs(wx, wy, w, h, topPadding, bottomPadding, leftPadding, rightPadding, spaceOffsetX, spaceOffsetY float64, data interface{}, tag string) *js.Object {
 	/*
 	   [WARNING] It's important to note that we don't need "js.MakeFullWrapper" for a call sequence as follows.
 	   ```
@@ -26,24 +71,28 @@ func GenerateRectColliderJs(wx, wy, w, h, topPadding, bottomPadding, leftPadding
 	   ```
 	   The "space" variable doesn't need access to the field of "a" in JavaScript level to run "space.Add(...)" method, which is good.
 	*/
-    return js.MakeWrapper(GenerateRectCollider(wx, wy, w, h, topPadding, bottomPadding, leftPadding, rightPadding, spaceOffsetX, spaceOffsetY, tag));
+	return js.MakeWrapper(GenerateRectCollider(wx, wy, w, h, topPadding, bottomPadding, leftPadding, rightPadding, spaceOffsetX, spaceOffsetY, data, tag))
 
 }
 
 func CheckCollisionJs(obj *resolv.Object, dx, dy float64) *js.Object {
 	// TODO: Support multiple tags in the future
 	// Unfortunately I couldn't find a way to just call "var a = GenerateRectColliderJs(...); space.Add(a); a.Check(...)" to get the collision result, the unwrapped method will result in stack overflow. Need a better solution later.
-    return js.MakeFullWrapper(obj.Check(dx, dy));
+	return js.MakeFullWrapper(obj.Check(dx, dy))
 }
 
-func ApplyInputFrameDownsyncDynamicsOnSingleRenderFrameJs(delayedInputFrame *InputFrameDownsync, currRenderFrame *RoomDownsyncFrame, collisionSys *resolv.Space, collisionSysMap map[int32]*resolv.Object, gravityX, gravityY, jumpingInitVelY, inputDelayFrames, inputScaleFrames int32, inputsBuffer *RingBuffer, collisionSpaceOffsetX, collisionSpaceOffsetY, snapIntoPlatformOverlap, snapIntoPlatformThreshold, worldToVirtualGridRatio, virtualGridToWorldRatio float64) *js.Object {
+func ApplyInputFrameDownsyncDynamicsOnSingleRenderFrameJs(delayedInputFrame, delayedInputFrameForPrevRenderFrame *InputFrameDownsync, currRenderFrame *RoomDownsyncFrame, collisionSys *resolv.Space, collisionSysMap map[int32]*resolv.Object, gravityX, gravityY, jumpingInitVelY, inputDelayFrames, inputScaleFrames int32, collisionSpaceOffsetX, collisionSpaceOffsetY, snapIntoPlatformOverlap, snapIntoPlatformThreshold, worldToVirtualGridRatio, virtualGridToWorldRatio float64) *js.Object {
 	// We need access to all fields of RoomDownsyncFrame for displaying in frontend
-    return js.MakeFullWrapper(models.ApplyInputFrameDownsyncDynamicsOnSingleRenderFrame(delayedInputFrame, currRenderFrame, collisionSys, collisionSysMap, gravityX, gravityY, jumpingInitVelY, inputDelayFrames, inputScaleFrames, inputsBuffer, collisionSpaceOffsetX, collisionSpaceOffsetY, snapIntoPlatformOverlap, snapIntoPlatformThreshold, worldToVirtualGridRatio, virtualGridToWorldRatio))
+	return js.MakeFullWrapper(models.ApplyInputFrameDownsyncDynamicsOnSingleRenderFrame(delayedInputFrame, delayedInputFrameForPrevRenderFrame, currRenderFrame, collisionSys, collisionSysMap, gravityX, gravityY, jumpingInitVelY, inputDelayFrames, inputScaleFrames, collisionSpaceOffsetX, collisionSpaceOffsetY, snapIntoPlatformOverlap, snapIntoPlatformThreshold, worldToVirtualGridRatio, virtualGridToWorldRatio))
 }
 
 func main() {
 	js.Global.Set("gopkgs", map[string]interface{}{
-        "NewRingBufferJs": NewRingBufferJs,
+		"NewVec2DJs":             NewVec2DJs,
+		"NewPolygon2DJs":         NewPolygon2DJs,
+		"NewBarrierJs":           NewBarrierJs,
+		"NewPlayerDownsyncJs":    NewPlayerDownsyncJs,
+		"NewRoomDownsyncFrameJs": NewRoomDownsyncFrameJs,
 		"NewCollisionSpaceJs":    NewCollisionSpaceJs,
 		"GenerateRectColliderJs": GenerateRectColliderJs,
 		"CheckCollisionJs":       CheckCollisionJs,

jsexport/models/battle.go

@@ -1,10 +1,10 @@
 package models
 
 import (
-	"github.com/solarlune/resolv"
-    . "dnmshared/sharedprotos"
-    . "jsexport/protos"
 	. "dnmshared"
+	. "dnmshared/sharedprotos"
+	"github.com/solarlune/resolv"
+	. "jsexport/protos"
 )
 
 const (
@@ -81,7 +81,7 @@ func CalcHardPushbacksNorms(playerCollider *resolv.Object, playerShape *resolv.C
 	return ret
 }
 
-func ApplyInputFrameDownsyncDynamicsOnSingleRenderFrame(delayedInputFrame *InputFrameDownsync, currRenderFrame *RoomDownsyncFrame, collisionSys *resolv.Space, collisionSysMap map[int32]*resolv.Object, gravityX, gravityY, jumpingInitVelY, inputDelayFrames, inputScaleFrames int32, inputsBuffer *RingBuffer, collisionSpaceOffsetX, collisionSpaceOffsetY, snapIntoPlatformOverlap, snapIntoPlatformThreshold, worldToVirtualGridRatio, virtualGridToWorldRatio float64) *RoomDownsyncFrame {
+func ApplyInputFrameDownsyncDynamicsOnSingleRenderFrame(delayedInputFrame, delayedInputFrameForPrevRenderFrame *InputFrameDownsync, currRenderFrame *RoomDownsyncFrame, collisionSys *resolv.Space, collisionSysMap map[int32]*resolv.Object, gravityX, gravityY, jumpingInitVelY, inputDelayFrames, inputScaleFrames int32, collisionSpaceOffsetX, collisionSpaceOffsetY, snapIntoPlatformOverlap, snapIntoPlatformThreshold, worldToVirtualGridRatio, virtualGridToWorldRatio float64) *RoomDownsyncFrame {
 	topPadding, bottomPadding, leftPadding, rightPadding := snapIntoPlatformOverlap, snapIntoPlatformOverlap, snapIntoPlatformOverlap, snapIntoPlatformOverlap
 	// [WARNING] This function MUST BE called while "InputsBufferLock" is locked!
 	roomCapacity := len(currRenderFrame.PlayersArr)
@@ -117,11 +117,6 @@ func ApplyInputFrameDownsyncDynamicsOnSingleRenderFrame(delayedInputFrame *Input
 
 	// 1. Process player inputs
 	if nil != delayedInputFrame {
-		var delayedInputFrameForPrevRenderFrame *InputFrameDownsync = nil
-		tmp := inputsBuffer.GetByFrameId(ConvertToInputFrameId(currRenderFrame.Id-1, inputDelayFrames, inputScaleFrames))
-		if nil != tmp {
-			delayedInputFrameForPrevRenderFrame = tmp.(*InputFrameDownsync)
-		}
 		inputList := delayedInputFrame.InputList
 		for i, currPlayerDownsync := range currRenderFrame.PlayersArr {
 			joinIndex := currPlayerDownsync.JoinIndex
@@ -187,9 +182,7 @@ func ApplyInputFrameDownsyncDynamicsOnSingleRenderFrame(delayedInputFrame *Input
 		}
 	}
 
-	// 3. Invoke collision system stepping (no-op for backend collision lib)
+	// 3. Calc pushbacks for each player (after its movement) w/o bullets
-
-	// 4. Calc pushbacks for each player (after its movement) w/o bullets
 	for i, currPlayerDownsync := range currRenderFrame.PlayersArr {
 		joinIndex := currPlayerDownsync.JoinIndex
 		collisionPlayerIndex := COLLISION_PLAYER_INDEX_PREFIX + joinIndex
@@ -201,6 +194,7 @@ func ApplyInputFrameDownsyncDynamicsOnSingleRenderFrame(delayedInputFrame *Input
 		if collision := playerCollider.Check(0, 0); nil != collision {
 			for _, obj := range collision.Objects {
 				isBarrier, isAnotherPlayer, isBullet := false, false, false
+				// TODO: Make this part work in JavaScript without having to expose all types Barrier/PlayerDownsync/MeleeBullet by js.MakeWrapper.
 				switch obj.Data.(type) {
 				case *Barrier:
 					isBarrier = true
@@ -262,7 +256,7 @@ func ApplyInputFrameDownsyncDynamicsOnSingleRenderFrame(delayedInputFrame *Input
 		}
 	}
 
-	// 7. Get players out of stuck barriers if there's any
+	// 4. Get players out of stuck barriers if there's any
 	for i, currPlayerDownsync := range currRenderFrame.PlayersArr {
 		joinIndex := currPlayerDownsync.JoinIndex
 		collisionPlayerIndex := COLLISION_PLAYER_INDEX_PREFIX + joinIndex