新增sceneTransition 用于场景过渡

source/src/Physics/Physics.ts

@@ -9,6 +9,10 @@ class Physics {
         this._spatialHash = new SpatialHash(this.spatialHashCellSize);
     }
 
+    public static clear(){
+        this._spatialHash.clear();
+    }
+
     public static overlapCircleAll(center: Vector2, randius: number, results: any[], layerMask = -1){
         return this._spatialHash.overlapCircle(center, randius, results, layerMask);
     }

source/src/Physics/Shapes/Polygon.ts

@@ -53,10 +53,8 @@ class Polygon extends Shape {
     public collidesWithShape(other: Shape){
         let result = new CollisionResult();
         if (other instanceof Polygon){
-            result = ShapeCollisions.polygonToPolygon(this, other);
-            return result;
+            return ShapeCollisions.polygonToPolygon(this, other);
         }
-           
 
         if (other instanceof Circle){
             result = ShapeCollisions.circleToPolygon(other, this);

source/src/Physics/Verlet/SpatialHash.ts

@@ -52,6 +52,10 @@ class SpatialHash {
         }
     }
 
+    public clear(){
+        this._cellDict.clear();
+    }
+
     public overlapCircle(circleCenter: Vector2, radius: number, results: Collider[], layerMask) {
         let bounds = new Rectangle(circleCenter.x - radius, circleCenter.y - radius, radius * 2, radius * 2);