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我想禁用远点和近点之间的钳位。已经尝试修改采样器以禁用对边缘的钳位（constexpr sampler s(address::clamp_to_zero)并且它对边缘按预期工作，但大多数远点和近点之间的坐标仍在钳位。

当前不需要的结果： https ://gph.is/g/ZyWjkzW

预期结果： https ://i.imgur.com/GjvwgyU.png

也尝试过encoder.setDepthClipMode(.clip)，但没有奏效。

部分代码：

    let descriptor = MTLRenderPipelineDescriptor()
    descriptor.colorAttachments[0].pixelFormat = .rgba16Float
    descriptor.colorAttachments[1].pixelFormat = .rgba16Float
    descriptor.depthAttachmentPixelFormat = .invalid

let descriptor = MTLRenderPassDescriptor()
    descriptor.colorAttachments[0].texture = outputColorTexture
    descriptor.colorAttachments[0].clearColor = clearColor
    descriptor.colorAttachments[0].loadAction = .load
    descriptor.colorAttachments[0].storeAction = .store
    descriptor.colorAttachments[1].texture = outputDepthTexture
    descriptor.colorAttachments[1].clearColor = clearColor
    descriptor.colorAttachments[1].loadAction = .load
    descriptor.colorAttachments[1].storeAction = .store
    descriptor.renderTargetWidth = Int(drawableSize.width)
    descriptor.renderTargetHeight = Int(drawableSize.height)

    guard let encoder = commandBuffer.makeRenderCommandEncoder(descriptor: descriptor) else { throw RenderingError.makeDescriptorFailed }
    encoder.setDepthClipMode(.clip)
    encoder.setRenderPipelineState(pipelineState)
    encoder.setFragmentTexture(inputColorTexture, index: 0)
    encoder.setFragmentTexture(inputDepthTexture, index: 1)
    encoder.setFragmentBuffer(uniformsBuffer, offset: 0, index: 0)
    encoder.drawPrimitives(type: .triangleStrip, vertexStart: 0, vertexCount: 4)
    encoder.endEncoding()
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