Graphics::MultiplyTransform Method (Matrix^)
Assembly: System.Drawing (in System.Drawing.dll)
This method prepends the matrix specified by the matrix parameter, so that the result is matrix x world transformation.
The following code example is designed for use with Windows Forms, and it requires PaintEventArgse, which is a parameter of the Paint event handler. The code performs the following actions:
Creates a transformMatrix matrix (a two by two identity matrix plus a zero-translation vector).
Translates the transform matrix by a vector (200, 100).
Rotates the world transformation matrix of the Windows Form by 30 degrees, prepends the rotation matrix for 30 degrees to the form's transformation matrix.
Multiplies the rotated world transformation matrix by the translated transformMatrix, and prepends the transformMatrix to the world transformation matrix.
Draws a rotated, translated ellipse.
public: void MultiplyTransformMatrix( PaintEventArgs^ e ) { // Create transform matrix. Matrix^ transformMatrix = gcnew Matrix; // Translate matrix, prepending translation vector. transformMatrix->Translate( 200.0F, 100.0F ); // Rotate transformation matrix of graphics object, // prepending rotation matrix. e->Graphics->RotateTransform( 30.0F ); // Multiply (prepend to) transformation matrix of // graphics object to translate graphics transformation. e->Graphics->MultiplyTransform( transformMatrix ); // Draw rotated, translated ellipse. e->Graphics->DrawEllipse( gcnew Pen( Color::Blue,3.0f ), -80, -40, 160, 80 ); }
Available since 1.1