public void SetupViewProjection()
{
GL.Viewport(
(int)_viewport[0], (int)_viewport[1],
(int)_viewport[2], (int)_viewport[3]);
GL.Scissor(
(int)_viewport[0], (int)_viewport[1],
(int)_viewport[2], (int)_viewport[3]);
GL.ClearColor(BackgroundColor);
GL.Enable(EnableCap.ScissorTest);
GL.Clear(ClearBufferMask.ColorBufferBit);
GL.Disable(EnableCap.ScissorTest);
// Define the view matrix
_viewMatrix = Matrix4.LookAt(
new Vector3(_wcCenter[0], _wcCenter[1], 10f),
new Vector3(_wcCenter[0], _wcCenter[1], 0f),
new Vector3(0f, 1f, 0f));
// Define the project matrix
float halfWCWidth = 0.5f * _wcWidth;
float halfWCHeight = halfWCWidth * _viewport[3] / _viewport[2]; // viewportH/viewportW
_projMatrix = Matrix4.CreateOrthographicOffCenter(
-halfWCWidth, halfWCWidth,
-halfWCHeight, halfWCHeight,
_nearPlane, _farPlane);
_vpMatrix = _viewMatrix * _projMatrix;
}
public Screen(int width, int height, string title) : base(width, height, GraphicsMode.Default, title)
{
Children = new ArrayList();
projection = Matrix4.CreateOrthographicOffCenter(0.0f, width, 0.0f, height, 0.1f, 100.0f);
}