新增Sprite用于控制纹理

source/src/ECS/Components/Sprite.ts

@@ -0,0 +1,24 @@
+class Sprite {
+    public texture2D: egret.Texture;
+    public readonly sourceRect: Rectangle;
+    public readonly center: Vector2;
+    public origin: Vector2;
+    public readonly uvs: Rectangle = new Rectangle();
+    
+    constructor(texture: egret.Texture, 
+        sourceRect: Rectangle = new Rectangle(texture.textureWidth, texture.textureHeight), 
+        origin: Vector2 = sourceRect.getHalfSize()){
+        this.texture2D = texture;
+        this.sourceRect = sourceRect;
+        this.center = new Vector2(sourceRect.width * 0.5, sourceRect.height * 0.5);
+        this.origin = origin;
+
+        let inverseTexW = 1 / texture.textureWidth;
+        let inverseTexH = 1 / texture.textureHeight
+
+        this.uvs.x = sourceRect.x * inverseTexW;
+        this.uvs.y = sourceRect.y * inverseTexH;
+        this.uvs.width = sourceRect.width * inverseTexW;
+        this.uvs.height = sourceRect.height * inverseTexH;
+    }
+}