public override NMatrix Calibrate(NPaintVisitor visitor, double imgWidth, double imgHeight, NRectangle targetRect)
{
// Initialize the image transform
NMatrix matrix = NMatrix.Identity;
// Scale the image so that it fits 2 times in width and 3 times in height
matrix.Scale(
NCustomTextureMappingExample.RectWidth / (2.0 * imgWidth),
NCustomTextureMappingExample.RectHeight / (3.0 * imgHeight));
// Rotate the image to the specified angle
matrix.Rotate(m_TextureMapping.TextureAngle * NAngle.Degree2Rad);
// Translate the image to the specfied pin point
matrix.Translate(m_TextureMapping.PinPoint.X, m_TextureMapping.PinPoint.Y);
return(matrix);
}