Matrix.RotateAt(Double, Double, Double) 方法

定义

命名空间:

System.Windows.Media

程序集:

WindowsBase.dll

绕指定的点旋转此矩阵。

public:
 void RotateAt(double angle, double centerX, double centerY);

public void RotateAt (double angle, double centerX, double centerY);

member this.RotateAt : double * double * double -> unit

Public Sub RotateAt (angle As Double, centerX As Double, centerY As Double)

参数

angle

Double

此矩阵要旋转的角度（单位为度）。

centerX

Double

此矩阵要围绕其旋转的点的 x 坐标。

centerY

Double

此矩阵要围绕其旋转的点的 y 坐标。

示例

以下示例演示如何围绕指定点旋转 Matrix 。

private Matrix rotateAboutPointExample()
{
    
    // Creating a Matrix structure.
    Matrix myMatrix = new Matrix(5, 10, 15, 20, 25, 30);
    
    // Rotate the matrix 90 degrees about the point (100,100).
    // myMatrix becomes equal to (-10, 4, -20, 15, 170, 25).
    myMatrix.RotateAt(90, 100, 100);
    
    return myMatrix; 
}