Matrix.RotateAt(Double, Double, Double) Matrix.RotateAt(Double, Double, Double) Matrix.RotateAt(Double, Double, Double) Matrix.RotateAt(Double, Double, Double) Method

定義

繞著指定的點旋轉這個矩陣。Rotates this matrix about the specified point.

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)

參數

angle
Double Double Double Double

這個矩陣的旋轉角度 (以度數為單位)。The angle, in degrees, by which to rotate this matrix.

centerX
Double Double Double Double

這個矩陣的旋轉中心點 X 座標。The x-coordinate of the point about which to rotate this matrix.

centerY
Double Double Double Double

這個矩陣的旋轉中心點 Y 座標。The y-coordinate of the point about which to rotate this matrix.

範例

下列範例顯示如何旋轉關於指定點Matrix的。The following example shows how to rotate a Matrix about a specified point.

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; 

}

適用於