// TODO: instead of an Action, maybe pass an interface?
// I think that might be easier to use. Hard to document
// what each action arguments should be.
public void DrawScene(GameTime gameTime, SpriteBatch spriteBatch, IStereoSceneDrawer sceneDrawer)
{
DrawSceneForEye(LeftEye, gameTime, renderTargetLeft, sceneDrawer);
DrawSceneForEye(RightEye, gameTime, renderTargetRight, sceneDrawer);
var leftRectangle = new Rectangle(
LeftEye.Viewport.X, LeftEye.Viewport.Y,
LeftEye.Viewport.Width, LeftEye.Viewport.Height);
var rightRectangle = new Rectangle(
RightEye.Viewport.X, RightEye.Viewport.Y,
LeftEye.Viewport.Width, RightEye.Viewport.Height);
graphicsDeviceManager.GraphicsDevice.SetRenderTarget(null);
spriteBatch.Begin(SpriteSortMode.Immediate, BlendState.Opaque /*, null, null, null, distortionShader*/);
spriteBatch.Draw(renderTargetLeft, leftRectangle, Color.White);
spriteBatch.End();
spriteBatch.Begin(SpriteSortMode.Immediate, BlendState.Opaque /*, null, null, null, distortionShader*/);
spriteBatch.Draw(renderTargetRight, rightRectangle, Color.White);
spriteBatch.End();
// TODO: implement monoscopic rendering, which will basically just call DrawScene
// once with the full ViewPort and a non-stereo view matrix/projection.
}
private void DrawSceneForEye(VREye eye, GameTime gameTime, RenderTarget2D renderTarget, IStereoSceneDrawer sceneDrawer)
{
graphicsDeviceManager.GraphicsDevice.SetRenderTarget(renderTarget);
graphicsDeviceManager.GraphicsDevice.DepthStencilState = new DepthStencilState()
{
DepthBufferEnable = true
};
graphicsDeviceManager.GraphicsDevice.Clear(Color.Navy);
sceneDrawer.DrawScene(
gameTime: gameTime,
viewport: graphicsDeviceManager.GraphicsDevice.Viewport,
// Note: The transform is in view space, but VREye.Translation is in world
// space, so we need to negate it here.
stereoTransform: Matrix.CreateTranslation(Vector3.Negate(eye.Translation)),
view: eye.Transform,
projection: eye.Projection);
}
