private void openGLControl1_Resized(object sender, EventArgs e)
{
OpenGL gl = openGLControl1.OpenGL;
//set ma tran viewport
gl.Viewport(
0, 0,
openGLControl1.Width,
openGLControl1.Height);
gl.LoadIdentity();
//set ma tran phep chieu
gl.MatrixMode(OpenGL.GL_PROJECTION);
gl.Perspective(cameraAngle,
openGLControl1.Width / openGLControl1.Height,
1.0, 100.0);
//set ma tran model view
gl.MatrixMode(OpenGL.GL_MODELVIEW);
gl.LookAt(cameraPosition[0], cameraPosition[1], cameraPosition[2],
viewPosition[0], viewPosition[1], viewPosition[2],
0, 0, 1);
}