// method called when Render is requested via Invalidate
private void glControl1_Render(object sender, OpenGL.GlControlEventArgs e)
{
Control senderControl = (Control)sender;
Gl.Viewport(0, 0, senderControl.ClientSize.Width, senderControl.ClientSize.Height);
Gl.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
GraphicsHandler.SetDrawingColor1();
GcodeHandler.RedrawFullPicture();
GraphicsHandler.SetDrawingColor2();
GcodeHandler.RedrawCompletedPicture();
}
