新增事件发送接收器

source/src/Math/Vector2.ts

@@ -8,9 +8,9 @@ class Vector2 {
      * @param x 二维空间中的x坐标
      * @param y 二维空间的y坐标
      */
-    constructor(x: number, y?: number){
-        this.x = x;
-        this.y = y ? y : x;
+    constructor(x? : number, y?: number){
+        this.x = x ? x : 0;
+        this.y = y ? y : this.x;
     }
 
     public static add(value1: Vector2, value2: Vector2){

source/src/Physics/Shapes/Polygon.ts

@@ -120,7 +120,7 @@ class Polygon extends Shape {
 
         for (let i = 0; i < vertCount; i++) {
             let a = 2 * Math.PI * (i / vertCount);
-            verts[i] = new Vector2(Math.cos(a), Math.sign(a) * radius);
+            verts[i] = new Vector2(Math.cos(a), Math.sin(a) * radius);
         }
 
         return verts;

source/src/Physics/Shapes/ShapeCollisions/ShapeCollisions.ts

@@ -2,7 +2,14 @@ class ShapeCollisions {
     public static polygonToPolygon(first: Polygon, second: Polygon){
         let result = new CollisionResult();
         let isIntersecting = true;
-        // let firstEdges = first.ed
+
+        let firstEdges = first.edgeNormals;
+        let secondEdges = second.edgeNormals;
+        let minIntervalDistance = Number.POSITIVE_INFINITY;
+        let translationAxis = new Vector2();
+        let polygonOffset = Vector2.subtract(first.position, second.position);
+        let axis: Vector2;
+        
     }
 
     public static circleToPolygon(circle: Circle, polygon: Polygon){

source/src/Physics/Verlet/Particle.ts

@@ -1,19 +0,0 @@
-class Particle {
-    public position: Vector2 = new Vector2(0, 0);
-    public lastPosition: Vector2 = new Vector2(0, 0);
-    public isPinned: boolean;
-    public pinnedPosition;
-    public acceleration: Vector2 = new Vector2(0, 0);
-    public mass: number = 1;
-    public radius: number = 0;
-    public collidesWithColliders = true;
-
-    constructor(position: Vector2){
-        this.position = position;
-        this.lastPosition = position;
-    }
-
-    public applyForce(force: Vector2){
-        this.acceleration = Vector2.add(this.acceleration, new Vector2(force.x / this.mass, force.y / this.mass));
-    }
-}

source/src/Utils/Emitter.ts

@@ -0,0 +1,29 @@
+class Emitter<T> {
+    private _messageTable: Map<T, Function[]>;
+
+    constructor(){
+        this._messageTable = new Map<T, Function[]>();
+    }
+
+    public addObserver(eventType: T, handler: Function){
+        let list: Function[] = this._messageTable.get(eventType);
+        if (!list){
+            list = [];
+            this._messageTable.set(eventType, list);
+        }
+
+        if (list.contains(handler))
+            console.warn("您试图添加相同的观察者两次");
+        list.push(handler);
+    }
+
+    public removeObserver(eventType: T, handler: Function){
+        this._messageTable.get(eventType).remove(handler);
+    }
+
+    public emit(eventType: T, data: any){
+        let list: Function[] = this._messageTable.get(eventType);
+        for (let i = list.length - 1; i >= 0; i --)
+            list[i](data);
+    }
+}