feat: update game timescale can effect to physics fixed time

assets/_Game/Scenes/Vital-Garden-theme.scene

@@ -336,7 +336,7 @@
     "_lpos": {
       "__type__": "cc.Vec3",
       "x": 540,
-      "y": 1169.9999999999995,
+      "y": 1169.9999999999998,
       "z": 0
     },
     "_lrot": {
@@ -387,7 +387,7 @@
     "_lpos": {
       "__type__": "cc.Vec3",
       "x": 0,
-      "y": 2.2737367544323206e-13,
+      "y": 0,
       "z": 1000
     },
     "_lrot": {
@@ -427,7 +427,7 @@
     "_priority": 0,
     "_fov": 45,
     "_fovAxis": 0,
-    "_orthoHeight": 1169.9999999999998,
+    "_orthoHeight": 1170,
     "_near": 0,
     "_far": 2000,
     "_color": {
@@ -17989,8 +17989,8 @@
     "defaultAnimation": "stage5",
     "_premultipliedAlpha": true,
     "_timeScale": 1,
-    "_preCacheMode": 0,
-    "_cacheMode": 0,
+    "_preCacheMode": 1,
+    "_cacheMode": 1,
     "_sockets": [],
     "_useTint": false,
     "_debugMesh": false,
@@ -29721,9 +29721,9 @@
       "__uuid__": "cc731501-912a-465f-9070-dbe0d8ad3598",
       "__expectedType__": "cc.Prefab"
     },
-    "weight": 10000,
+    "weight": 60,
     "weightStepOnGoal": 0,
-    "maxWeight": 10000,
+    "maxWeight": 60,
     "maxObjects": 1
   },
   {
@@ -34995,7 +34995,7 @@
     "_contentSize": {
       "__type__": "cc.Size",
       "width": 1080,
-      "height": 2339.9999999999995
+      "height": 2340
     },
     "_anchorPoint": {
       "__type__": "cc.Vec2",

assets/_Game/Scripts/Extension/Extension.ts

@@ -8,6 +8,7 @@ import {
     Label,
     Node,
     NodeSpace,
+    PhysicsSystem2D,
     Sprite,
     Vec2,
     Vec3,
@@ -94,13 +95,16 @@ declare global {
 
 //#region GAME
 
+const fixedTime = PhysicsSystem2D.instance.fixedTimeStep;
+
 Game.prototype.timeScale = 1;
 // @ts-ignore
-game._calculateDT = function (useFixedDeltaTime: number) {
+game._calculateDT = function (useFixedDeltaTime: boolean) {
+    PhysicsSystem2D.instance.fixedTimeStep = fixedTime * game.timeScale;
     this._useFixedDeltaTime = useFixedDeltaTime;
     if (useFixedDeltaTime) {
         this._startTime = performance.now();
-        return this.frameTime / 1000;
+        return (this.frameTime / 1000) * game.timeScale;
     }
     const now = performance.now();
     this._deltaTime = now > this._startTime ? (now - this._startTime) / 1000 : 0;