public GoogleVrHmd(IServiceRegistry registry) : base(registry)
{
#if XENKO_PLATFORM_ANDROID
GoogleVr.Startup(Game, (Activity)PlatformAndroid.Context);
#else
GoogleVr.Startup(Game);
#endif
}
public override void Draw(GameTime gameTime)
{
GoogleVr.GetHeadMatrix(out headMatrix);
var headMatrixTr = headMatrix;
headMatrixTr.Transpose();
Matrix leftEyeMatrix, rightEyeMatrix;
GoogleVr.GetEyeMatrix(0, out leftEyeMatrix);
GoogleVr.GetEyeMatrix(1, out rightEyeMatrix);
Matrix projLeft, projRight;
GoogleVr.GetPerspectiveMatrix(0, LeftCameraComponent.NearClipPlane, LeftCameraComponent.FarClipPlane, out projLeft);
GoogleVr.GetPerspectiveMatrix(1, LeftCameraComponent.NearClipPlane, LeftCameraComponent.FarClipPlane, out projRight);
// var iosRotL = Matrix.RotationYawPitchRoll(0, 0, MathUtil.Pi);
// var iosRotR = Matrix.RotationYawPitchRoll(0, 0, MathUtil.Pi);
// projLeft *= iosRotL;
// projRight *= iosRotR;
Vector3 scale, camPos;
Quaternion camRot;
//have to make sure it's updated now
CameraRootEntity.Transform.UpdateWorldMatrix();
CameraRootEntity.Transform.WorldMatrix.Decompose(out scale, out camRot, out camPos);
LeftCameraComponent.ProjectionMatrix = projLeft;
var pos = camPos + leftEyeMatrix.TranslationVector * ViewScaling;
var rotV = headMatrixTr * Matrix.Scaling(ViewScaling) * Matrix.RotationQuaternion(camRot);
var finalUp = Vector3.TransformCoordinate(new Vector3(0, 1, 0), rotV);
var finalForward = Vector3.TransformCoordinate(new Vector3(0, 0, -1), rotV);
var view = Matrix.LookAtRH(pos, pos + finalForward, finalUp);
LeftCameraComponent.ViewMatrix = view;
RightCameraComponent.ProjectionMatrix = projRight;
pos = camPos + rightEyeMatrix.TranslationVector * ViewScaling;
rotV = headMatrixTr * Matrix.Scaling(ViewScaling) * Matrix.RotationQuaternion(camRot);
finalUp = Vector3.TransformCoordinate(new Vector3(0, 1, 0), rotV);
finalForward = Vector3.TransformCoordinate(new Vector3(0, 0, -1), rotV);
view = Matrix.LookAtRH(pos, pos + finalForward, finalUp);
RightCameraComponent.ViewMatrix = view;
base.Draw(gameTime);
}
public override void Initialize(Entity cameraRoot, CameraComponent leftCamera, CameraComponent rightCamera, bool requireMirror = false)
{
var size = RenderFrameSize;
if (!GoogleVr.Init(size.Width, size.Height))
{
throw new Exception("Failed to Init Google VR SDK");
}
RenderFrameProvider = new DirectRenderFrameProvider(RenderFrame.FromTexture(
Texture.New2D(GraphicsDevice, size.Width, size.Height, PixelFormat.R8G8B8A8_UNorm_SRgb, TextureFlags.RenderTarget | TextureFlags.ShaderResource)
));
var compositor = (SceneGraphicsCompositorLayers)Game.SceneSystem.SceneInstance.RootScene.Settings.GraphicsCompositor;
compositor.Master.Add(new SceneDelegateRenderer((x, y) =>
{
var frame = GoogleVr.GetNextFrame();
GoogleVr.SubmitRenderTarget(x.GraphicsContext, RenderFrameProvider.RenderFrame.RenderTargets[0], frame, 0);
if (!GoogleVr.SubmitFrame(GraphicsDevice, frame, ref headMatrix))
{
throw new Exception("Failed to SubmitFrame to Google VR SDK");
}
}));
leftCamera.UseCustomProjectionMatrix = true;
rightCamera.UseCustomProjectionMatrix = true;
leftCamera.UseCustomViewMatrix = true;
rightCamera.UseCustomViewMatrix = true;
leftCamera.NearClipPlane *= ViewScaling;
rightCamera.NearClipPlane *= ViewScaling;
if (requireMirror)
{
MirrorTexture = RenderFrameProvider.RenderFrame.RenderTargets[0]; //we don't really have a mirror in this case but avoid crashes
}
base.Initialize(cameraRoot, leftCamera, rightCamera, requireMirror);
}
