init framework

source/src/Math/Matrix2D.ts

@@ -0,0 +1,130 @@
+/**
+ * 表示右手3 * 3的浮点矩阵，可以存储平移、缩放和旋转信息。
+ */
+class Matrix2D {
+    public m11: number;
+    public m12: number;
+
+    public m21: number;
+    public m22: number;
+
+    public m31: number;
+    public m32: number;
+
+    private static _identity: Matrix2D = new Matrix2D(1, 0, 0, 1, 0, 0);
+
+    /**
+     * 单位矩阵
+     */
+    public static get identity(){
+        return Matrix2D._identity;
+    }
+
+    constructor(m11: number, m12: number, m21: number, m22: number, m31: number, m32: number){
+        this.m11 = m11;
+        this.m12 = m12;
+
+        this.m21 = m21;
+        this.m22 = m22;
+        
+        this.m31 = m31;
+        this.m32 = m32;
+    }
+
+    /** 存储在这个矩阵中的位置 */
+    public get translation(){
+        return new Vector2(this.m31, this.m32);
+    }
+
+    public set translation(value: Vector2){
+        this.m31 = value.x;
+        this.m32 = value.y;
+    }
+
+    /** 以弧度表示的旋转存储在这个矩阵中 */
+    public get rotation(){
+        return Math.atan2(this.m21, this.m11);
+    }
+
+    public set rotation(value: number){
+        let val1 = Math.cos(value);
+        let val2 = Math.sin(value);
+
+        this.m11 = val1;
+        this.m12 = val2;
+        this.m21 = -val2;
+        this.m22 = val1;
+    }
+
+    /**
+     * 以度为单位的旋转存储在这个矩阵中
+     */
+    public get rotationDegrees(){
+        return MathHelper.ToDegrees(this.rotation);
+    }
+
+    public set rotationDegrees(value: number){
+        this.rotation = MathHelper.ToRadians(value);
+    }
+
+    public get scale(){
+        return new Vector2(this.m11, this.m22);
+    }
+
+    public set scale(value: Vector2){
+        this.m11 = value.x;
+        this.m12 = value.y;
+    }
+
+    /**
+     * 创建一个新的matrix, 它包含两个矩阵的和。
+     * @param matrix1 
+     * @param matrix2 
+     */
+    public static add(matrix1: Matrix2D, matrix2: Matrix2D){
+        matrix1.m11 += matrix2.m11;
+        matrix1.m12 += matrix2.m12;
+
+        matrix1.m21 += matrix2.m21;
+        matrix1.m22 += matrix2.m22;
+
+        matrix1.m31 += matrix2.m31;
+        matrix1.m32 += matrix2.m32;
+
+        return matrix1;
+    }
+
+    public static divide(matrix1: Matrix2D, matrix2: Matrix2D){
+        matrix1.m11 /= matrix2.m11;
+        matrix1.m12 /= matrix2.m12;
+
+        matrix1.m21 /= matrix2.m21;
+        matrix1.m22 /= matrix2.m22;
+
+        matrix1.m31 /= matrix2.m31;
+        matrix1.m32 /= matrix2.m32;
+
+        return matrix1;
+    }
+
+    public static multiply(matrix1: Matrix2D, matrix2: Matrix2D){
+        let m11 = ( matrix1.m11 * matrix2.m11 ) + ( matrix1.m12 * matrix2.m21 );
+        let m12 = ( matrix1.m11 * matrix2.m12 ) + ( matrix1.m12 * matrix2.m22 );
+
+        let m21 = ( matrix1.m21 * matrix2.m11 ) + ( matrix1.m22 * matrix2.m21 );
+        let m22 = ( matrix1.m21 * matrix2.m12 ) + ( matrix1.m22 * matrix2.m22 );
+
+        let m31 = ( matrix1.m31 * matrix2.m11 ) + ( matrix1.m32 * matrix2.m21 ) + matrix2.m31;
+        let m32 = ( matrix1.m31 * matrix2.m12 ) + ( matrix1.m32 * matrix2.m22 ) + matrix2.m32;
+
+        matrix1.m11 = m11;
+        matrix1.m12 = m12;
+
+        matrix1.m21 = m21;
+        matrix1.m22 = m22;
+
+        matrix1.m31 = m31;
+        matrix1.m32 = m32;
+        return matrix1;
+    }
+}