public unsafe MTLShader(ref ShaderDescription description, MTLGraphicsDevice gd)
: base(description.Stage)
{
_device = gd;
if (description.ShaderBytes.Length > 4 &&
description.ShaderBytes[0] == 0x4d &&
description.ShaderBytes[1] == 0x54 &&
description.ShaderBytes[2] == 0x4c &&
description.ShaderBytes[3] == 0x42)
{
DispatchQueue queue = Dispatch.dispatch_get_global_queue(QualityOfServiceLevel.QOS_CLASS_USER_INTERACTIVE, 0);
fixed(byte *shaderBytesPtr = description.ShaderBytes)
{
DispatchData dispatchData = Dispatch.dispatch_data_create(
shaderBytesPtr,
(UIntPtr)description.ShaderBytes.Length,
queue,
IntPtr.Zero);
try
{
Library = gd.Device.newLibraryWithData(dispatchData);
}
finally
{
Dispatch.dispatch_release(dispatchData.NativePtr);
}
}
}
else
{
string source = Encoding.UTF8.GetString(description.ShaderBytes);
MTLCompileOptions compileOptions = MTLCompileOptions.New();
Library = gd.Device.newLibraryWithSource(source, compileOptions);
ObjectiveCRuntime.release(compileOptions);
}
Function = Library.newFunctionWithName(description.EntryPoint);
if (Function.NativePtr == IntPtr.Zero)
{
throw new VeldridException(
$"Failed to create Metal {description.Stage} Shader. The given entry point \"{description.EntryPoint}\" was not found.");
}
if (Function.functionConstantsDictionary.count != UIntPtr.Zero)
{
// Need to create specialized MTLFunction.
ObjectiveCRuntime.release(Function.NativePtr);
MTLFunctionConstantValues constantValues = MTLFunctionConstantValues.New();
Function = Library.newFunctionWithNameConstantValues(description.EntryPoint, constantValues);
ObjectiveCRuntime.release(constantValues.NativePtr);
Debug.Assert(Function.NativePtr != IntPtr.Zero, "Failed to create specialized MTLFunction");
}
}
public IMTLLibrary LoadLibrary(IMTLDevice device, MemoryStream ms)
{
using (var tr = new StreamReader(ms))
{
string source = tr.ReadToEnd();
var options = new MTLCompileOptions
{
LanguageVersion = MTLLanguageVersion.v1_1,
FastMathEnabled = false,
};
NSError err;
IMTLLibrary library = device.CreateLibrary(source, options, out err);
if (library == null)
{
// TODO: better error handling
throw new Exception(err.ToString());
}
return(library);
}
}
public void ReturnReleaseTest()
{
// This test tries to exercise all the Metal API that has a
// ReturnRelease attribute. To test that the attribute does the
// right thing: run the test app using instruments, run the test
// several times by tapping on it, and do a heap mark between each
// test. Then verify that there's at least one heap shot with 0
// memory increase, which means that nothing is leaking.
var device = MTLDevice.SystemDefault;
IntPtr buffer_mem;
int buffer_length;
bool freed;
byte [] buffer_bytes;
// some older hardware won't have a default
if (device == null)
{
Assert.Inconclusive("Metal is not supported");
}
// Apple claims that "Indirect command buffers" are available with MTLGPUFamilyCommon2, but it crashes on at least one machine.
// Log what the current device supports, just to have it in the log.
foreach (MTLFeatureSet fs in Enum.GetValues(typeof(MTLFeatureSet)))
{
Console.WriteLine($"This device supports feature set: {fs}: {device.SupportsFeatureSet (fs)}");
}
if (TestRuntime.CheckXcodeVersion(11, 0))
{
foreach (MTLGpuFamily gf in Enum.GetValues(typeof(MTLGpuFamily)))
{
Console.WriteLine($"This device supports Gpu family: {gf}: {device.SupportsFamily (gf)}");
}
}
string metal_code = File.ReadAllText(Path.Combine(NSBundle.MainBundle.ResourcePath, "metal-sample.metal"));
string metallib_path = Path.Combine(NSBundle.MainBundle.ResourcePath, "default.metallib");
string fragmentshader_path = Path.Combine(NSBundle.MainBundle.ResourcePath, "fragmentShader.metallib");
#if !__MACOS__ && !__MACCATALYST__
if (Runtime.Arch == Arch.SIMULATOR)
{
Assert.Ignore("Metal isn't available in the simulator");
}
#endif
using (var hd = new MTLHeapDescriptor()) {
hd.CpuCacheMode = MTLCpuCacheMode.DefaultCache;
hd.StorageMode = MTLStorageMode.Private;
using (var txt = MTLTextureDescriptor.CreateTexture2DDescriptor(MTLPixelFormat.RGBA8Unorm, 40, 40, false)) {
var sa = device.GetHeapTextureSizeAndAlign(txt);
hd.Size = sa.Size;
using (var heap = device.CreateHeap(hd)) {
Assert.IsNotNull(heap, $"NonNullHeap");
}
}
}
using (var queue = device.CreateCommandQueue()) {
Assert.IsNotNull(queue, "Queue: NonNull 1");
}
#if __MACOS__
if (TestRuntime.CheckXcodeVersion(10, 0) && device.SupportsFeatureSet(MTLFeatureSet.macOS_GPUFamily2_v1))
{
using (var descriptor = MTLTextureDescriptor.CreateTexture2DDescriptor(MTLPixelFormat.RGBA8Unorm, 64, 64, false)) {
descriptor.StorageMode = MTLStorageMode.Private;
using (var texture = device.CreateSharedTexture(descriptor)) {
Assert.IsNotNull(texture, "CreateSharedTexture (MTLTextureDescriptor): NonNull");
using (var handle = texture.CreateSharedTextureHandle())
using (var shared = device.CreateSharedTexture(handle))
Assert.IsNotNull(texture, "CreateSharedTexture (MTLSharedTextureHandle): NonNull");
}
}
}
#endif
using (var queue = device.CreateCommandQueue(10)) {
Assert.IsNotNull(queue, "Queue: NonNull 2");
}
using (var buffer = device.CreateBuffer(1024, MTLResourceOptions.CpuCacheModeDefault)) {
Assert.IsNotNull(buffer, "CreateBuffer: NonNull 1");
}
buffer_mem = AllocPageAligned(1, out buffer_length);
using (var buffer = device.CreateBuffer(buffer_mem, (nuint)buffer_length, MTLResourceOptions.CpuCacheModeDefault)) {
Assert.IsNotNull(buffer, "CreateBuffer: NonNull 2");
}
FreePageAligned(buffer_mem, buffer_length);
buffer_bytes = new byte [getpagesize()];
using (var buffer = device.CreateBuffer(buffer_bytes, MTLResourceOptions.CpuCacheModeDefault)) {
Assert.IsNotNull(buffer, "CreateBuffer: NonNull 3");
}
buffer_mem = AllocPageAligned(1, out buffer_length);
freed = false;
#if __MACOS__
var resourceOptions7 = MTLResourceOptions.StorageModeManaged;
#else
var resourceOptions7 = MTLResourceOptions.CpuCacheModeDefault;
#endif
using (var buffer = device.CreateBufferNoCopy(buffer_mem, (nuint)buffer_length, resourceOptions7, (pointer, length) => { FreePageAligned(pointer, (int)length); freed = true; })) {
Assert.IsNotNull(buffer, "CreateBufferNoCopy: NonNull 1");
}
Assert.IsTrue(freed, "CreateBufferNoCopy: Freed 1");
using (var descriptor = new MTLDepthStencilDescriptor())
using (var dss = device.CreateDepthStencilState(descriptor)) {
Assert.IsNotNull(dss, "CreateDepthStencilState: NonNull 1");
}
using (var descriptor = MTLTextureDescriptor.CreateTexture2DDescriptor(MTLPixelFormat.RGBA8Unorm, 64, 64, false)) {
using (var texture = device.CreateTexture(descriptor))
Assert.NotNull(texture, "CreateTexture: NonNull 1");
using (var surface = new IOSurface.IOSurface(new IOSurface.IOSurfaceOptions {
Width = 64,
Height = 64,
BytesPerElement = 4,
})) {
using (var texture = device.CreateTexture(descriptor, surface, 0))
Assert.NotNull(texture, "CreateTexture: NonNull 2");
}
}
using (var descriptor = new MTLSamplerDescriptor())
using (var sampler = device.CreateSamplerState(descriptor))
Assert.IsNotNull(sampler, "CreateSamplerState: NonNull 1");
using (var library = device.CreateDefaultLibrary())
Assert.IsNotNull(library, "CreateDefaultLibrary: NonNull 1");
using (var library = device.CreateLibrary(metallib_path, out var error)) {
Assert.IsNotNull(library, "CreateLibrary: NonNull 1");
Assert.IsNull(error, "CreateLibrary: NonNull error 1");
}
using (var data = DispatchData.FromByteBuffer(File.ReadAllBytes(metallib_path)))
using (var library = device.CreateLibrary(data, out var error)) {
Assert.IsNotNull(library, "CreateLibrary: NonNull 2");
Assert.IsNull(error, "CreateLibrary: NonNull error 2");
}
using (var compile_options = new MTLCompileOptions())
using (var library = device.CreateLibrary(metal_code, compile_options, out var error)) {
Assert.IsNotNull(library, "CreateLibrary: NonNull 3");
Assert.IsNull(error, "CreateLibrary: NonNull error 3");
}
using (var compile_options = new MTLCompileOptions()) {
device.CreateLibrary(metal_code, compile_options, (library, error) => {
Assert.IsNotNull(library, "CreateLibrary: NonNull 4");
Assert.IsNull(error, "CreateLibrary: NonNull error 4");
});
}
using (var library = device.CreateDefaultLibrary(NSBundle.MainBundle, out var error)) {
Assert.IsNotNull(library, "CreateDefaultLibrary: NonNull 2");
Assert.IsNull(error, "CreateDefaultLibrary: NonNull error 2");
}
using (var descriptor = new MTLRenderPipelineDescriptor())
using (var library = device.CreateDefaultLibrary())
using (var func = library.CreateFunction("vertexShader")) {
descriptor.VertexFunction = func;
descriptor.ColorAttachments [0].PixelFormat = MTLPixelFormat.BGRA8Unorm_sRGB;
using (var rps = device.CreateRenderPipelineState(descriptor, out var error)) {
Assert.IsNotNull(rps, "CreateRenderPipelineState: NonNull 1");
Assert.IsNull(error, "CreateRenderPipelineState: NonNull error 1");
}
}
using (var descriptor = new MTLRenderPipelineDescriptor())
using (var library = device.CreateDefaultLibrary())
using (var func = library.CreateFunction("vertexShader")) {
descriptor.VertexFunction = func;
descriptor.ColorAttachments [0].PixelFormat = MTLPixelFormat.BGRA8Unorm_sRGB;
using (var rps = device.CreateRenderPipelineState(descriptor, MTLPipelineOption.BufferTypeInfo, out var reflection, out var error)) {
Assert.IsNotNull(rps, "CreateRenderPipelineState: NonNull 2");
Assert.IsNull(error, "CreateRenderPipelineState: NonNull error 2");
Assert.IsNotNull(reflection, "CreateRenderPipelineState: NonNull reflection 2");
}
}
using (var library = device.CreateDefaultLibrary())
using (var func = library.CreateFunction("grayscaleKernel"))
using (var cps = device.CreateComputePipelineState(func, MTLPipelineOption.ArgumentInfo, out var reflection, out var error)) {
Assert.IsNotNull(cps, "CreateComputePipelineState: NonNull 1");
Assert.IsNull(error, "CreateComputePipelineState: NonNull error 1");
Assert.IsNotNull(reflection, "CreateComputePipelineState: NonNull reflection 1");
}
using (var library = device.CreateDefaultLibrary())
using (var func = library.CreateFunction("grayscaleKernel"))
using (var cps = device.CreateComputePipelineState(func, out var error)) {
Assert.IsNotNull(cps, "CreateComputePipelineState: NonNull 2");
Assert.IsNull(error, "CreateComputePipelineState: NonNull error 2");
}
using (var descriptor = new MTLComputePipelineDescriptor())
using (var library = device.CreateDefaultLibrary())
using (var func = library.CreateFunction("grayscaleKernel")) {
descriptor.ComputeFunction = func;
using (var cps = device.CreateComputePipelineState(descriptor, MTLPipelineOption.BufferTypeInfo, out var reflection, out var error)) {
Assert.IsNotNull(cps, "CreateComputePipelineState: NonNull 3");
Assert.IsNull(error, "CreateComputePipelineState: NonNull error 3");
Assert.IsNotNull(reflection, "CreateComputePipelineState: NonNull reflection 3");
}
}
using (var fence = device.CreateFence()) {
Assert.IsNotNull(fence, "CreateFence 1: NonNull");
}
var url = "file://" + metallib_path;
url = url.Replace(" ", "%20"); // url encode!
using (var library = device.CreateLibrary(new NSUrl(url), out var error)) {
#if NET
// Looks like creating a library with a url always fails: https://forums.developer.apple.com/thread/110416
Assert.IsNotNull(library, "CreateLibrary (NSUrl, NSError): Null");
Assert.IsNull(error, "CreateLibrary (NSUrl, NSError): NonNull error");
#else
// Looks like creating a library with a url always fails: https://forums.developer.apple.com/thread/110416
Assert.IsNull(library, "CreateLibrary (NSUrl, NSError): Null");
Assert.IsNotNull(error, "CreateLibrary (NSUrl, NSError): NonNull error");
#endif
}
using (var library = device.CreateArgumentEncoder(new MTLArgumentDescriptor [] { new MTLArgumentDescriptor()
{
DataType = MTLDataType.Int
} })) {
Assert.IsNotNull(library, "CreateArgumentEncoder (MTLArgumentDescriptor[]): NonNull");
}
// Apple's charts say that "Indirect command buffers" are supported with MTLGpuFamilyCommon2
var supportsIndirectCommandBuffers = TestRuntime.CheckXcodeVersion(11, 0) && device.SupportsFamily(MTLGpuFamily.Common2);
#if __MACOS__
// but something's not quite right somewhere, so on macOS verify that the device supports a bit more than what Apple says.
supportsIndirectCommandBuffers &= device.SupportsFeatureSet(MTLFeatureSet.macOS_GPUFamily2_v1);
#endif
if (supportsIndirectCommandBuffers)
{
using (var descriptor = new MTLIndirectCommandBufferDescriptor()) {
using (var library = device.CreateIndirectCommandBuffer(descriptor, 1, MTLResourceOptions.CpuCacheModeDefault)) {
Assert.IsNotNull(library, "CreateIndirectCommandBuffer: NonNull");
}
}
using (var evt = device.CreateEvent()) {
Assert.IsNotNull(evt, "CreateEvent: NonNull");
}
using (var evt = device.CreateSharedEvent()) {
Assert.IsNotNull(evt, "CreateSharedEvent: NonNull");
}
using (var evt1 = device.CreateSharedEvent())
using (var evt_handle = evt1.CreateSharedEventHandle())
using (var evt = device.CreateSharedEvent(evt_handle)) {
Assert.IsNotNull(evt, "CreateSharedEvent (MTLSharedEventHandle): NonNull");
}
}
using (var descriptor = new MTLRenderPipelineDescriptor())
using (var library = device.CreateDefaultLibrary())
using (var func = library.CreateFunction("vertexShader")) {
descriptor.VertexFunction = func;
descriptor.ColorAttachments [0].PixelFormat = MTLPixelFormat.BGRA8Unorm_sRGB;
using (var rps = device.CreateRenderPipelineState(descriptor, MTLPipelineOption.ArgumentInfo, out var reflection, out var error)) {
Assert.IsNotNull(rps, "CreateRenderPipelineState (MTLTileRenderPipelineDescriptor, MTLPipelineOption, MTLRenderPipelineReflection, NSError): NonNull");
Assert.IsNull(error, "CreateRenderPipelineState (MTLTileRenderPipelineDescriptor, MTLPipelineOption, MTLRenderPipelineReflection, NSError: NonNull error");
Assert.IsNotNull(reflection, "CreateRenderPipelineState (MTLTileRenderPipelineDescriptor, MTLPipelineOption, MTLRenderPipelineReflection, NSError): NonNull reflection");
}
}
using (var buffer = device.CreateBuffer(1024, MTLResourceOptions.CpuCacheModeDefault))
using (var descriptor = new MTLTextureDescriptor())
using (var texture = buffer.CreateTexture(descriptor, 0, 256)) {
Assert.IsNotNull(buffer, "MTLBuffer.CreateTexture (MTLTextureDescriptor, nuint, nuint): NonNull");
}
using (var descriptor = MTLTextureDescriptor.CreateTexture2DDescriptor(MTLPixelFormat.RGBA8Unorm, 64, 64, false))
using (var texture = device.CreateTexture(descriptor)) {
using (var view = texture.CreateTextureView(MTLPixelFormat.RGBA8Unorm)) {
Assert.IsNotNull(view, "MTLTexture.CreateTextureView (MTLPixelFormat): nonnull");
}
using (var view = texture.CreateTextureView(MTLPixelFormat.RGBA8Unorm, MTLTextureType.k2D, new NSRange(0, 1), new NSRange(0, 1))) {
Assert.IsNotNull(view, "MTLTexture.CreateTextureView (MTLPixelFormat, MTLTextureType, NSRange, NSRange): nonnull");
}
}
using (var library = device.CreateLibrary(fragmentshader_path, out var error)) {
Assert.IsNull(error, "MTLFunction.CreateArgumentEncoder: library creation failure");
using (var func = library.CreateFunction("fragmentShader2")) {
using (var enc = func.CreateArgumentEncoder(0)) {
Assert.IsNotNull(enc, "MTLFunction.CreateArgumentEncoder (nuint): NonNull");
}
using (var enc = func.CreateArgumentEncoder(0, out var reflection)) {
Assert.IsNotNull(enc, "MTLFunction.CreateArgumentEncoder (nuint, MTLArgument): NonNull");
Assert.IsNotNull(reflection, "MTLFunction.CreateArgumentEncoder (nuint, MTLArgument): NonNull reflection");
}
}
}
using (var library = device.CreateDefaultLibrary()) {
using (var func = library.CreateFunction("grayscaleKernel")) {
Assert.IsNotNull(func, "CreateFunction (string): nonnull");
}
if (TestRuntime.CheckXcodeVersion(9, 0)) // MTLFunctionConstantValues didn't have a default ctor until Xcode 9.
{
using (var constants = new MTLFunctionConstantValues())
using (var func = library.CreateFunction("grayscaleKernel", constants, out var error)) {
Assert.IsNotNull(func, "CreateFunction (string, MTLFunctionConstantValues, NSError): nonnull");
Assert.IsNull(error, "CreateFunction (string, MTLFunctionConstantValues, NSError): null error");
}
}
}
using (var hd = new MTLHeapDescriptor()) {
hd.CpuCacheMode = MTLCpuCacheMode.DefaultCache;
hd.StorageMode = MTLStorageMode.Private;
using (var txt = MTLTextureDescriptor.CreateTexture2DDescriptor(MTLPixelFormat.RGBA8Unorm, 40, 40, false)) {
var sa = device.GetHeapTextureSizeAndAlign(txt);
hd.Size = sa.Size;
using (var heap = device.CreateHeap(hd))
using (var buffer = heap.CreateBuffer(1024, MTLResourceOptions.StorageModePrivate)) {
Assert.IsNotNull(buffer, "MTLHeap.CreateBuffer (nuint, MTLResourceOptions): nonnull");
}
}
}
using (var hd = new MTLHeapDescriptor()) {
hd.CpuCacheMode = MTLCpuCacheMode.DefaultCache;
#if __MACOS__ || __MACCATALYST__
hd.StorageMode = MTLStorageMode.Private;
#else
hd.StorageMode = MTLStorageMode.Shared;
#endif
using (var txt = MTLTextureDescriptor.CreateTexture2DDescriptor(MTLPixelFormat.RGBA8Unorm, 40, 40, false)) {
var sa = device.GetHeapTextureSizeAndAlign(txt);
hd.Size = sa.Size;
using (var heap = device.CreateHeap(hd)) {
#if __MACOS__ || __MACCATALYST__
txt.StorageMode = MTLStorageMode.Private;
#endif
using (var texture = heap.CreateTexture(txt)) {
Assert.IsNotNull(texture, "MTLHeap.CreateTexture (MTLTextureDescriptor): nonnull");
}
}
}
}
using (var scope = MTLCaptureManager.Shared.CreateNewCaptureScope(device)) {
Assert.IsNotNull(scope, "MTLCaptureManager.CreateNewCaptureScope (MTLDevice): nonnull");
}
using (var queue = device.CreateCommandQueue())
using (var scope = MTLCaptureManager.Shared.CreateNewCaptureScope(queue)) {
Assert.IsNotNull(scope, "MTLCaptureManager.CreateNewCaptureScope (MTLCommandQueue): nonnull");
}
TestRuntime.AssertXcodeVersion(10, 0);
using (var evt = device.CreateSharedEvent())
using (var shared = evt.CreateSharedEventHandle()) {
Assert.IsNotNull(shared, "MTLSharedEvent.CreateSharedEvent: NonNull");
}
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
// Set the view to use the default device
device = MTLDevice.SystemDefault;
if (device == null)
{
Console.WriteLine("Metal is not supported on this device");
View = new NSView(View.Frame);
}
// Create a new command queue
commandQueue = device.CreateCommandQueue();
NSError error;
// Setup view
view = (MTKView)View;
view.Delegate = this;
view.Device = device;
view.SampleCount = 1;
view.DepthStencilPixelFormat = MTLPixelFormat.Depth32Float_Stencil8;
view.ColorPixelFormat = MTLPixelFormat.BGRA8Unorm;
view.PreferredFramesPerSecond = 60;
view.ClearColor = new MTLClearColor(0, 0, 0, 1.0f);
// Functions
var source = System.IO.File.ReadAllText("Triangle.metal");
MTLCompileOptions compileOptions = new MTLCompileOptions()
{
LanguageVersion = MTLLanguageVersion.v2_0,
};
IMTLLibrary customLibrary = device.CreateLibrary(source, compileOptions, out error);
IMTLFunction kernelFunction = customLibrary.CreateFunction("tessellation_kernel_triangle");
IMTLFunction vertexFunction = customLibrary.CreateFunction("tessellation_vertex_triangle");
IMTLFunction fragmentFunction = customLibrary.CreateFunction("tessellation_fragment");
// Create a vertex descriptor
MTLVertexDescriptor vertexDescriptor = new MTLVertexDescriptor();
vertexDescriptor.Attributes[0].Format = MTLVertexFormat.Float4;
vertexDescriptor.Attributes[0].BufferIndex = 0;
vertexDescriptor.Attributes[0].Offset = 0;
vertexDescriptor.Layouts[0].Stride = 4 * sizeof(float);
vertexDescriptor.Layouts[0].StepRate = 1;
vertexDescriptor.Layouts[0].StepFunction = MTLVertexStepFunction.PerPatchControlPoint;
// Create RenderPipeline
var renderPipelineStateDescriptor = new MTLRenderPipelineDescriptor
{
SampleCount = view.SampleCount,
VertexFunction = vertexFunction,
FragmentFunction = fragmentFunction,
VertexDescriptor = vertexDescriptor,
DepthAttachmentPixelFormat = view.DepthStencilPixelFormat,
StencilAttachmentPixelFormat = view.DepthStencilPixelFormat,
MaxTessellationFactor = 16,
IsTessellationFactorScaleEnabled = false,
TessellationFactorFormat = MTLTessellationFactorFormat.Half,
TessellationControlPointIndexType = MTLTessellationControlPointIndexType.None,
TessellationFactorStepFunction = MTLTessellationFactorStepFunction.Constant,
TessellationOutputWindingOrder = MTLWinding.Clockwise,
TessellationPartitionMode = MTLTessellationPartitionMode.FractionalEven,
};
renderPipelineStateDescriptor.ColorAttachments[0].PixelFormat = view.ColorPixelFormat;
renderPipelineState = device.CreateRenderPipelineState(renderPipelineStateDescriptor, out error);
if (renderPipelineState == null)
{
Console.WriteLine("Failed to created pipeline state, error {0}", error);
}
MTLDepthStencilDescriptor depthStateDesc = new MTLDepthStencilDescriptor
{
DepthCompareFunction = MTLCompareFunction.Less,
DepthWriteEnabled = true
};
depthState = device.CreateDepthStencilState(depthStateDesc);
computePipelineState = device.CreateComputePipelineState(kernelFunction, out error);
// Buffers
tessellationFactorsBuffer = device.CreateBuffer(256, MTLResourceOptions.StorageModePrivate);
tessellationFactorsBuffer.Label = "Tessellation Factors";
controlPointsBuffer = device.CreateBuffer(controlPointPositionsTriangle, MTLResourceOptions.StorageModeManaged);
controlPointsBuffer.Label = "Control Points Triangle";
}
