protected override void OnRenderFrame(FrameEventArgs e)
{
base.OnRenderFrame(e);
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
Vector3 camPos = new Vector3(0, 2, 5);
Quaternion camOri = Quaternion.Identity;
#if RENDER_OCULUS
for (int i = 0; i < 2; i++)
{
//zoom field of view
var fov = new FovPort
{
DownTan = eyes[i].desc.Fov.DownTan / zoomFactor,
UpTan = eyes[i].desc.Fov.UpTan / zoomFactor,
LeftTan = eyes[i].desc.Fov.LeftTan / zoomFactor,
RightTan = eyes[i].desc.Fov.RightTan / zoomFactor
};
eyes[i].proj = OvrDLL.ovrMatrix4f_Projection(fov, 0.1f, 1000.0f, ProjectionModifier.ClipRangeOpenGL);
//bind eye fbo
bindFbo(eyes[i]);
//combine the "camera" position/rotation with the position/rotation of the eye
Vector3 finalPos = camPos + (camOri * eyes[i].pose.Position);
Matrix4 finalRot = Matrix4.CreateFromQuaternion(camOri * eyes[i].pose.Orientation);
//create the view matrix with a lookat basis vectors
Vector3 up = eyes[i].pose.Orientation * Vector3.UnitY;
Vector3 fwd = eyes[i].pose.Orientation * -Vector3.UnitZ;
Matrix4 view = Matrix4.LookAt(finalPos, finalPos + fwd, up);
//draw the scene
drawScene(view, eyes[i].proj);
//commit the swapchain
OvrDLL.ovr_CommitTextureSwapChain(session, eyes[i].swapChain);
}
//send to Oculus
LayerEyeFov eyeFov = layers[0] as LayerEyeFov;
eyeFov.Header.Flags = LayerFlags.TextureOriginAtBottomLeft;
eyeFov.ColorTexture[0] = eyes[0].swapChain;
eyeFov.ColorTexture[1] = eyes[1].swapChain;
eyeFov.Fov[0] = eyes[0].desc.Fov;
eyeFov.Fov[1] = eyes[1].desc.Fov;
eyeFov.Viewport[0] = new Recti(new Vector2i(0,0), eyes[0].renderTargetSize);
eyeFov.Viewport[1] = new Recti(new Vector2i(0, 0), eyes[1].renderTargetSize);
eyeFov.RenderPose[0] = eyes[0].pose;
eyeFov.RenderPose[1] = eyes[1].pose;
ViewScaleDesc viewScale = new ViewScaleDesc();
result = OvrDLL.ovr_SubmitFrame(session, 0, ref viewScale, layers.GetUnmanagedLayers(), 1);
if (result < 0)
{
Console.WriteLine("Error submitting frame");
OvrDLL.ovr_GetLastErrorInfo(ref error);
Console.WriteLine("Last Error Info: {0}-{1}", error.result, error.ErrorString);
}
//blit mirror to fbo
OvrDLL.ovr_GetMirrorTextureBufferGL(session, mirror, ref myMirrorTexture);
blitMirror((int)myMirrorTexture);
#else
Matrix4 view = Matrix4.CreateTranslation(-camPos);
Matrix4 proj = Matrix4.CreatePerspectiveFieldOfView(MathHelper.DegreesToRadians(60.0f), 1.0f, 0.1f, 1000.0f);
drawScene(view, proj);
#endif
SwapBuffers();
}
