Question

我在MacOS上有一个MetalKit项目，除深度模板外，其他一切都按预期工作。

因为我只能找到iOS深度模板的示例，所以我关注这些示例。创建渲染管道后立即调用下面的代码段，但是newDepthStencilStateWithDescriptor的返回值似乎无效（设备和标签均为null）。

我可能将MTKView设置错误，但是我不确定，因为没有使用MTKView和MacOS的深度模板的例子。

如果任何人都可以解释这是怎么发生的，我该如何调试它，或者如果我有可以与之比较的示例代码，那将是很好的。

desc := MTLDepthStencilDescriptor.alloc.init.autorelease;
desc.setDepthCompareFunction(MTLCompareFunctionLess);
desc.setDepthWriteEnabled(true);
desc.setLabel(NSSTR('MY DEPTH STENCIL'));

depthStencilState := device.newDepthStencilStateWithDescriptor(desc);

<MTLDepthStencilDescriptorInternal: 0x1003153a0>
    label = MY DEPTH STENCIL 
    depthCompareFunction = MTLCompareFunctionLess 
    depthWriteEnabled = 1 
    frontFace: 
        stencilCompareFunction        = MTLCompareFunctionAlways 
        stencilFailOperation          = MTLStencilOperationKeep 
        stencilPassDepthFailOperation = MTLStencilOperationKeep 
        stencilPassDepthPassOperation = MTLStencilOperationKeep 
        stencilReadMask               = 0xffffffff 
        stencilWriteMask              = 0xffffffff 
    backFace: 
        stencilCompareFunction        = MTLCompareFunctionAlways 
        stencilFailOperation          = MTLStencilOperationKeep 
        stencilPassDepthFailOperation = MTLStencilOperationKeep 
        stencilPassDepthPassOperation = MTLStencilOperationKeep 
        stencilReadMask               = 0xffffffff 
        stencilWriteMask              = 0xffffffff
<MTLIGDepthStencilState: 0x1003241d0>
    label = <none> 
    device = <null>

请注意深度模具无法正常工作，并且片段绘制顺序错误。

Answer 1

我得到不一致的输出的原因是因为在我测试过的金属验证的Xcode项目中启用了，但是在我的项目中却没有。如果启用验证，则值是一致的。

启用验证后，相同的代码将返回：

<MTLDebugDepthStencilState: 0x100758d40> -> <MTLIGDepthStencilState: 0x1007582a0>
    label = <none> 
    device = <null><MTLDepthStencilDescriptorInternal: 0x100758e20>
        label = MY DEPTH STENCIL 
        depthCompareFunction = MTLCompareFunctionLess 
        depthWriteEnabled = 1 
        frontFace: <MTLStencilDescriptorInternal: 0x100758f60>
            stencilCompareFunction        = MTLCompareFunctionAlways 
            stencilFailureOperation       = MTLStencilOperationKeep 
            stencilPassDepthFailOperation = MTLStencilOperationKeep 
            stencilPassDepthPassOperation = MTLStencilOperationKeep 
            stencilReadMask               = 0xffffffff 
            stencilWriteMask              = 0xffffffff 
        backFace: <MTLStencilDescriptorInternal: 0x100758f90>
            stencilCompareFunction        = MTLCompareFunctionAlways 
            stencilFailureOperation       = MTLStencilOperationKeep 
            stencilPassDepthFailOperation = MTLStencilOperationKeep 
            stencilPassDepthPassOperation = MTLStencilOperationKeep 
            stencilReadMask               = 0xffffffff 
            stencilWriteMask              = 0xffffffff

所以整个问题毕竟是鲱鱼。深度模具仍然无法使用，因此问题可能出在我的着色器或顶点数据中。

金属深度模具不起作用

1 个答案: