void RenderBox (IMTLRenderCommandEncoder renderEncoder, GameView view, nuint offset, string name)
{
renderEncoder.PushDebugGroup (name);
// set context state
renderEncoder.SetRenderPipelineState (pipelineState);
renderEncoder.SetVertexBuffer (vertexBuffer, 0, 0);
renderEncoder.SetVertexBuffer (dynamicConstantBuffer [constantDataBufferIndex], offset, 1);
// tell the render context we want to draw our primitives
renderEncoder.DrawPrimitives (MTLPrimitiveType.Triangle, 0, 36, 1);
renderEncoder.PopDebugGroup ();
}
public void Render (GameView view)
{
inflightSemaphore.WaitOne ();
PrepareToDraw ();
IMTLCommandBuffer commandBuffer = commandQueue.CommandBuffer ();
ICAMetalDrawable drawable = view.GetNextDrawable ();
MTLRenderPassDescriptor renderPassDescriptor = view.GetRenderPassDescriptor (drawable);
if (renderPassDescriptor == null)
Console.WriteLine ("ERROR: Failed to get render pass descriptor from view!");
IMTLRenderCommandEncoder renderEncoder = commandBuffer.CreateRenderCommandEncoder (renderPassDescriptor);
renderEncoder.SetDepthStencilState (depthState);
RenderBox (renderEncoder, view, 0, "Box1");
RenderBox (renderEncoder, view, (nuint)Marshal.SizeOf<Uniforms> (), "Box2");
renderEncoder.EndEncoding ();
commandBuffer.AddCompletedHandler ((IMTLCommandBuffer buffer) => {
drawable.Dispose ();
inflightSemaphore.Release ();
});
commandBuffer.PresentDrawable (drawable);
commandBuffer.Commit ();
constantDataBufferIndex = (constantDataBufferIndex + 1) % max_inflight_buffers;
}
public void Configure (GameView view)
{
view.DepthPixelFormat = depthPixelFormat;
view.StencilPixelFormat = stencilPixelFormat;
view.SampleCount = sampleCount;
dynamicConstantBuffer = new IMTLBuffer[max_inflight_buffers];
// allocate one region of memory for the constant buffer
for (int i = 0; i < max_inflight_buffers; i++) {
dynamicConstantBuffer [i] = device.CreateBuffer (max_bytes_per_frame, MTLResourceOptions.CpuCacheModeDefault);
dynamicConstantBuffer [i].Label = string.Format ("ConstantBuffer{0}", i);
}
// load the fragment program into the library
IMTLFunction fragmentProgram = defaultLibrary.CreateFunction ("lighting_fragment");
if (fragmentProgram == null)
Console.WriteLine ("ERROR: Couldnt load fragment function from default library");
// load the vertex program into the library
IMTLFunction vertexProgram = defaultLibrary.CreateFunction ("lighting_vertex");
if (vertexProgram == null)
Console.WriteLine ("ERROR: Couldnt load vertex function from default library");
// setup the vertex buffers
vertexBuffer = device.CreateBuffer<float> (cubeVertexData, MTLResourceOptions.CpuCacheModeDefault);
vertexBuffer.Label = "Vertices";
// create a reusable pipeline state
var pipelineStateDescriptor = new MTLRenderPipelineDescriptor {
Label = "MyPipeline",
SampleCount = sampleCount,
VertexFunction = vertexProgram,
FragmentFunction = fragmentProgram,
DepthAttachmentPixelFormat = depthPixelFormat
};
pipelineStateDescriptor.ColorAttachments [0].PixelFormat = MTLPixelFormat.BGRA8Unorm;
NSError error;
pipelineState = device.CreateRenderPipelineState (pipelineStateDescriptor, out error);
var depthStateDesc = new MTLDepthStencilDescriptor {
DepthCompareFunction = MTLCompareFunction.Less,
DepthWriteEnabled = true
};
depthState = device.CreateDepthStencilState (depthStateDesc);
}
public void Reshape (GameView view)
{
var aspect = (float)(view.Bounds.Size.Width / view.Bounds.Size.Height);
projectionMatrix = CreateMatrixFromPerspective (FOVY, aspect, 0.1f, 100.0f);
viewMatrix = LookAt (eye, center, up);
}