Matrix.ScaleAt(Double, Double, Double, Double) 方法

定义

命名空间:

System.Windows.Media

程序集:

WindowsBase.dll

围绕指定的点按指定的量缩放此 Matrix。

public:
 void ScaleAt(double scaleX, double scaleY, double centerX, double centerY);

public void ScaleAt (double scaleX, double scaleY, double centerX, double centerY);

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

Public Sub ScaleAt (scaleX As Double, scaleY As Double, centerX As Double, centerY As Double)

参数

scaleX

Double

此 Matrix 沿 x 轴的缩放量。

scaleY

Double

此 Matrix 沿 y 轴的缩放量。

centerX

Double

缩放操作中心点的 x 坐标。

centerY

Double

缩放操作中心点的 y 坐标。

示例

以下示例演示如何缩放 Matrix 结构。

private Matrix scaleExample()
{
    Matrix myMatrix = new Matrix(5, 10, 15, 20, 25, 30);
    
    // Scale myMatrix by a horizontal factor of 2
    // and a vertical factor of 4 about the origin.
    // After this operation,
    // myMatrix is equal to (10, 40, 30, 80, 50, 120)
    myMatrix.Scale(2, 4);
    
    return myMatrix;
}

private Matrix scaleAboutPointExample()
{
    Matrix myMatrix = new Matrix(5, 10, 15, 20, 25, 30);
    
    // Scale myMatrix by a horizontal factor of 2
    // and a vertical factor of 4 about the 
    // point (100,100).
    // After this operation,
    // myMatrix is equal to (10, 40, 30, 80, -50, -180)
    myMatrix.ScaleAt(2, 4, 100, 100);
    
    return myMatrix;
}