init framework

source/src/Math/Vector2.ts

@@ -0,0 +1,46 @@
+/** 2d 向量 */
+class Vector2 {
+    public x: number;
+    public y: number;
+
+    /**
+     * 从两个值构造一个带有X和Y的二维向量。
+     * @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;
+    }
+
+    public static add(value1: Vector2, value2: Vector2){
+        value1.x += value2.x;
+        value1.y += value2.y;
+        return value1;
+    }
+
+    public static divide(value1: Vector2, value2: Vector2){
+        value1.x /= value2.x;
+        value1.y /= value2.y;
+        return value1;
+    }
+
+    public static multiply(value1: Vector2, value2: Vector2){
+        value1.x *= value2.x;
+        value1.y *= value2.y;
+        return value1;
+    }
+
+    public static subtract(value1: Vector2, value2: Vector2){
+        value1.x -= value2.x;
+        value1.y -= value2.y;
+        return value1;
+    }
+
+    /** 变成一个方向相同的单位向量 */
+    public normalize(){
+        let val = 1 / Math.sqrt((this.x * this.x) + (this.y * this.y));
+        this.x *= val;
+        this.y *= val;
+    }
+}