/// <summary>
/// The -0.5 pixel offset is needed in DirectX 9 to correctly match the texture coordinates:
/// http://msdn.microsoft.com/en-us/library/windows/desktop/bb219690(v=vs.85).aspx
/// </summary>
public override void SetModelViewProjectionMatrixFor2D()
{
const float Offset = -0.5f;
SetModelMatrix(Matrix.Identity);
SetProjectionMatrix(Matrix.Identity);
var pixelSpaceViewport = ScreenSpace.Current.ToPixelSpace(ScreenSpace.Current.Viewport);
ShaderEffect.View = XnaMatrix.CreateOrthographicOffCenter(
pixelSpaceViewport.Left + Offset, pixelSpaceViewport.Right + Offset,
pixelSpaceViewport.Bottom + Offset, pixelSpaceViewport.Top + Offset, 0, 1);
}
/// <summary>
/// LoadContent will be called once per game and is the place to load
/// all of your content.
/// </summary>
protected override void LoadContent()
{
_basicEffect = new BasicEffect(GraphicsDevice)
{
World = Matrix.Identity,
View = Matrix.CreateLookAt(new Vector3(0, 0, 1), Vector3.Zero, Vector3.Up),
// Specify how 3D points are projected/transformed onto the 2D screen
Projection = Matrix.CreateOrthographicOffCenter(0,
GraphicsDevice.Viewport.Width,
GraphicsDevice.Viewport.Height,
0,
1.0f, 1000.0f),
// Tell BasicEffect to make use of your vertex colors
VertexColorEnabled = true
};
Level = new Level(_score);
}
