新增相机bounds与可渲染组件bounds 并添加可渲染组件的剔除方法

source/src/Math/Rectangle.ts

@@ -4,10 +4,85 @@ class Rectangle {
     public width: number;
     public height: number;
 
-    constructor(x: number, y: number, width: number, height: number){
+    private _tempMat: Matrix2D;
+    private _transformMat: Matrix2D;
+
+    public get left() {
+        return this.x;
+    }
+
+    public get right() {
+        return this.x + this.width;
+    }
+
+    public get top() {
+        return this.y;
+    }
+
+    public get bottom() {
+        return this.y + this.height;
+    }
+
+    public get location() {
+        return new Vector2(this.x, this.y);
+    }
+
+    public set location(value: Vector2) {
+        this.x = value.x;
+        this.y = value.y;
+    }
+
+    constructor(x: number, y: number, width: number, height: number) {
         this.x = x;
         this.y = y;
         this.width = width;
         this.height = height;
     }
+
+    public intersects(value: Rectangle) {
+        return value.left < this.right &&
+            this.left < value.right &&
+            value.top < this.bottom &&
+            this.top < value.bottom;
+    }
+
+    public calculateBounds(parentPosition: Vector2, position: Vector2, origin: Vector2, scale: Vector2,
+        rotation: number, width: number, height: number) {
+        if (rotation == 0) {
+            this.x = parentPosition.x + position.x - origin.x * scale.x;
+            this.y = parentPosition.y + position.y - origin.y * scale.y;
+            this.width = width * scale.x;
+            this.height = height * scale.y;
+        }else{
+            let worldPosX = parentPosition.x + position.x;
+            let worldPosY = parentPosition.y + position.y;
+
+            this._transformMat = Matrix2D.createTranslation(-worldPosX - origin.x, -worldPosY - origin.y);
+            this._tempMat = Matrix2D.createScale(scale.x, scale.y);
+            this._transformMat = Matrix2D.multiply(this._transformMat, this._tempMat);
+            this._tempMat = Matrix2D.createRotation(rotation);
+            this._transformMat = Matrix2D.multiply(this._transformMat, this._tempMat);
+            this._tempMat = Matrix2D.createTranslation(worldPosX, worldPosY);
+            this._transformMat = Matrix2D.multiply(this._transformMat, this._tempMat);
+
+            let topLeft = new Vector2(worldPosX, worldPosY);
+            let topRight = new Vector2(worldPosX + width, worldPosY);
+            let bottomLeft = new Vector2(worldPosX, worldPosY + height);
+            let bottomRight = new Vector2(worldPosX + width, worldPosY + height);
+
+            topLeft = Vector2.transform(topLeft, this._transformMat);
+            topRight = Vector2.transform(topRight, this._transformMat);
+            bottomLeft = Vector2.transform(bottomLeft, this._transformMat);
+            bottomRight = Vector2.transform(bottomRight, this._transformMat);
+
+            let minX = MathHelper.minOf(topLeft.x, bottomRight.x, topRight.x, bottomLeft.x);
+            let maxX = MathHelper.maxOf(topLeft.x, bottomRight.x, topRight.x, bottomLeft.x);
+            let minY = MathHelper.minOf(topLeft.y, bottomRight.y, topRight.y, bottomLeft.y);
+            let maxY = MathHelper.maxOf(topLeft.y, bottomRight.y, topRight.y, bottomLeft.y);
+
+            this.location = new Vector2(minX, minY);
+            this.width = maxX - minX;
+            this.height = maxY - minY;
+        }
+    }
 }