public unsafe override void OnNewFrame(float totalSeconds, float elapsedSeconds)
{
float angle = totalSeconds * 0.125f;
Matrix4 world = Matrix4.CreateRotationX(angle) * Matrix4.CreateRotationY(2 * angle) * Matrix4.CreateRotationZ(3 * angle);
world.Transpose();
Vector3 cameraPosition = new Vector3(5, 3, 0);
Matrix4 view = Matrix4.LookAt(cameraPosition, Vector3.Zero, Vector3.UnitZ);
Matrix4 proj = Matrix4.CreatePerspectiveFieldOfView((float)Math.PI / 4f, 1f, 0.1f, 1000f);
Matrix4 invertY = Matrix4.Identity;
invertY.M22 = -1f;
Matrix4 viewProjection = view * proj * invertY;
viewProjection.Transpose();
Vector3 lightPosition = new Vector3(10, -7, 2);
transformBuffer.SetDataByMapping((IntPtr)(&world));
cameraBuffer.SetDataByMapping((IntPtr)(&viewProjection));
cameraExtraBuffer.SetDataByMapping((IntPtr)(&cameraPosition));
lightBuffer.SetDataByMapping((IntPtr)(&lightPosition));
framebuffer.ClearColor(0, new Color4(0.4f, 0.6f, 0.9f, 1.0f));
framebuffer.ClearDepthStencil(DepthStencil.Both, 1f, 0);
Context.Actions.ClearWindowColor(new Color4(0, 0, 0, 1));
Context.Actions.ClearWindowDepthStencil(DepthStencil.Both, 1f, 0);
Context.States.ScreenClipping.United.Viewport.Set(RenderTargetSize, RenderTargetSize);
Context.States.Rasterizer.FrontFace.Set(FrontFaceDirection.Cw);
Context.States.Rasterizer.CullFaceEnable.Set(true);
Context.States.Rasterizer.CullFace.Set(CullFaceMode.Front);
Context.States.DepthStencil.DepthTestEnable.Set(true);
Context.States.DepthStencil.DepthMask.Set(true);
Context.Bindings.Framebuffers.Draw.Set(framebuffer);
Context.Bindings.Program.Set(program);
Context.Bindings.VertexArray.Set(vertexArray);
Context.Bindings.Buffers.UniformIndexed[0].Set(transformBuffer);
Context.Bindings.Buffers.UniformIndexed[1].Set(cameraBuffer);
Context.Bindings.Buffers.UniformIndexed[2].Set(lightBuffer);
Context.Bindings.Textures.Units[0].Set(diffuseMap);
Context.Bindings.Samplers[0].Set(sampler);
// Inside cube
Context.Actions.Draw.Elements(BeginMode.Triangles, 36, DrawElementsType.UnsignedShort, 0);
renderTarget.GenerateMipmap();
// Outside cube
proj = Matrix4.CreatePerspectiveFieldOfView((float)Math.PI / 4f, (float)GameWindow.ClientSize.Width / GameWindow.ClientSize.Height, 0.1f, 1000f);
viewProjection = view * proj;
viewProjection.Transpose();
#if INTEL_WORKAROUND
cameraOutsideBuffer.SetDataByMapping((IntPtr)(&viewProjection));
#else
cameraBuffer.SetDataByMapping((IntPtr)(&viewProjection));
#endif
Context.States.ScreenClipping.United.Viewport.Set(GameWindow.ClientSize.Width, GameWindow.ClientSize.Height);
Context.States.Rasterizer.FrontFace.Set(FrontFaceDirection.Ccw);
Context.Bindings.Framebuffers.Draw.Set(null);
#if INTEL_WORKAROUND
Context.Pipeline.UniformBuffers[1] = cameraOutsideBuffer;
#endif
Context.Bindings.Textures.Units[0].Set(renderTarget);
Context.Bindings.Samplers[0].Set(sampler);
Context.Actions.Draw.Elements(BeginMode.Triangles, 36, DrawElementsType.UnsignedShort, 0);
}