我一直在搞乱 DirectX，而且我一直在研究我的这个奇怪的想法已经有一段时间了。似乎我的像素着色器由于某种奇怪的原因没有被调用。我不知道这是否可能，或者这是我的一些愚蠢的错误。代码如下（我从教程中复制了大部分内容。）
着色器（HLSL）代码如下：
/*
********************************************************************************************************
* Constant Buffers (Can only change per render call).
********************************************************************************************************
*/
cbuffer SConstantBuffer : register( b0 )
{
float3 origin;
float3 direction;
float planeDistance;
int screenWidth;
int screenHeight;
};
/*
********************************************************************************************************
* Input and Output Structures
********************************************************************************************************
*/
struct VS_INPUT
{
float3 position : POSITION;
float4 color : COLOR;
};
struct VS_OUTPUT
{
float4 position : SV_POSITION;
float4 color : COLOR;
};
/*
********************************************************************************************************
* Vertex Shader main
********************************************************************************************************
*/
VS_OUTPUT VS( VS_INPUT input )
{
VS_OUTPUT output = (VS_OUTPUT)0;
float param_d;
float3 pixelPoint;
float3 zAxis = { 0.0, 0.0, 1.0 };
float3 planeOrigin = origin + (direction * planeDistance);
float3 pointDirection = (input.position - origin) / length( (input.position - origin) );
param_d = dot( (planeOrigin - origin), direction ) / dot( pointDirection, direction );
pixelPoint = ( pointDirection * param_d ) + origin;
output.position.xyz = cross ( pixelPoint, direction );
output.position.x = output.position.x * 5.0;
output.position.y = output.position.y * 5.0;
output.position.z = 20.0;
output.position.w = output.position.z;
output.color = input.color;
return output;
}
/*
********************************************************************************************************
* Pixel Shader main
********************************************************************************************************
*/
float4 PS( VS_OUTPUT input ) : SV_Target
{
return float4( 1.0, 1.0, 1.0, 1.0); //input.color;
}
DirectX 初始化和渲染代码如下：
#include "Renderer.h"
CRenderer::CRenderer ( )
{
this->m_dxDevice = NULL;
this->m_dxDeviceContext = NULL;
this->m_dxRenderTargetView = NULL;
this->m_dxSwapChain = NULL;
this->m_dxBackBuffer = NULL;
this->m_dxVertexLayout = NULL;
this->m_dxVertexBuffer = NULL;
this->m_dxPixelShader = NULL;
this->m_dxConstantBuffer = NULL;
}
HRESULT CompileShaderFromFile( WCHAR* szFileName, LPCSTR szEntryPoint, LPCSTR szShaderModel, ID3DBlob** ppBlobOut )
{
HRESULT hr = S_OK;
DWORD dwShaderFlags = D3DCOMPILE_ENABLE_STRICTNESS;
#if defined( DEBUG ) || defined( _DEBUG )
// Set the D3DCOMPILE_DEBUG flag to embed debug information in the shaders.
// Setting this flag improves the shader debugging experience, but still allows
// the shaders to be optimized and to run exactly the way they will run in
// the release configuration of this program.
dwShaderFlags |= D3DCOMPILE_DEBUG;
#endif
ID3DBlob* pErrorBlob;
hr = D3DX11CompileFromFile( szFileName, NULL, NULL, szEntryPoint, szShaderModel,
dwShaderFlags, 0, NULL, ppBlobOut, &pErrorBlob, NULL );
if( FAILED(hr) )
{
if( pErrorBlob != NULL )
OutputDebugStringA( (char*)pErrorBlob->GetBufferPointer() );
if( pErrorBlob ) pErrorBlob->Release();
return hr;
}
if( pErrorBlob ) pErrorBlob->Release();
return S_OK;
}
HRESULT CRenderer::InitDevice ( HWND arg_hWnd )
{
HRESULT status = S_OK;
this->m_hWnd = arg_hWnd;
RECT rctWindowSize;
GetClientRect( arg_hWnd, &rctWindowSize );
UINT dWidth = rctWindowSize.right - rctWindowSize.left;
UINT dHeight = rctWindowSize.bottom - rctWindowSize.top;
UINT dCreateDeviceFlag = 0;
#ifdef _DEBUG
dCreateDeviceFlag |= D3D11_CREATE_DEVICE_DEBUG;
#endif _DEBUG
D3D_DRIVER_TYPE pDriverType [] =
{
D3D_DRIVER_TYPE_HARDWARE,
D3D_DRIVER_TYPE_WARP,
D3D_DRIVER_TYPE_REFERENCE
};
UINT numDriverType = ARRAYSIZE(pDriverType);
D3D_FEATURE_LEVEL pFeatureLevel [] =
{
D3D_FEATURE_LEVEL_11_0,
D3D_FEATURE_LEVEL_10_1,
D3D_FEATURE_LEVEL_10_0
};
UINT numFeatureLevel = ARRAYSIZE(pFeatureLevel);
//Fillout Device Descriptor
DXGI_SWAP_CHAIN_DESC objSwapChainDesc;
ZeroMemory(&objSwapChainDesc, sizeof(objSwapChainDesc));
objSwapChainDesc.BufferCount = 1;
objSwapChainDesc.BufferDesc.Width = dWidth;
objSwapChainDesc.BufferDesc.Height = dHeight;
objSwapChainDesc.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
objSwapChainDesc.BufferDesc.RefreshRate.Numerator = 60;
objSwapChainDesc.BufferDesc.RefreshRate.Denominator = 1;
objSwapChainDesc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
objSwapChainDesc.OutputWindow = this->m_hWnd;
objSwapChainDesc.SampleDesc.Count = 1;
objSwapChainDesc.SampleDesc.Quality = 0;
objSwapChainDesc.Windowed = true;
//Parse and create the appropriate type of device
for ( UINT driverTypeIndex = 0; driverTypeIndex < numDriverType; driverTypeIndex++ )
{
this->m_objDriverType = pDriverType[driverTypeIndex];
status = D3D11CreateDeviceAndSwapChain ( NULL,
this->m_objDriverType,
NULL,
dCreateDeviceFlag,
pFeatureLevel,
numFeatureLevel,
D3D11_SDK_VERSION,
&objSwapChainDesc,
&(this->m_dxSwapChain),
&(this->m_dxDevice),
&(this->m_objFeatureLevel),
&(this->m_dxDeviceContext) );
if ( SUCCEEDED(status) )
break;
}
if ( FAILED(status) )
return status;
//Create a render traget
this->m_dxBackBuffer = NULL;
status = this->m_dxSwapChain->GetBuffer ( 0, __uuidof(ID3D11Texture2D), (LPVOID*)(&this->m_dxBackBuffer) );
if ( FAILED(status) )
return status;
status = this->m_dxDevice->CreateRenderTargetView ( this->m_dxBackBuffer, NULL, &(this->m_dxRenderTargetView) );
if ( FAILED(status) )
return status;
//CreatDepth Stencil
D3D11_TEXTURE2D_DESC objDepthStencilDesc;
ZeroMemory(&objDepthStencilDesc, sizeof(objDepthStencilDesc));
D3D11_DEPTH_STENCIL_VIEW_DESC objDepthStencilViewDesc;
ZeroMemory(&objDepthStencilViewDesc, sizeof(objDepthStencilViewDesc));
objDepthStencilDesc.Width = dWidth;
objDepthStencilDesc.Height = dHeight;
objDepthStencilDesc.MipLevels = 1;
objDepthStencilDesc.ArraySize = 1;
objDepthStencilDesc.Format = DXGI_FORMAT_D24_UNORM_S8_UINT;
objDepthStencilDesc.SampleDesc.Count = 1;
objDepthStencilDesc.SampleDesc.Quality = 0;
objDepthStencilDesc.Usage = D3D11_USAGE_DEFAULT;
objDepthStencilDesc.BindFlags = D3D11_BIND_DEPTH_STENCIL;
objDepthStencilDesc.MiscFlags = 0;
objDepthStencilDesc.CPUAccessFlags = 0;
status = this->m_dxDevice->CreateTexture2D (
&objDepthStencilDesc,
NULL,
&(this->m_dxDepthStencilBuffer)
);
if ( FAILED(status) )
return status;
objDepthStencilViewDesc.Format = objDepthStencilDesc.Format;
objDepthStencilViewDesc.ViewDimension = D3D11_DSV_DIMENSION_TEXTURE2D;
objDepthStencilViewDesc.Texture2D.MipSlice = 0;
status = this->m_dxDevice->CreateDepthStencilView (
this->m_dxDepthStencilBuffer,
&objDepthStencilViewDesc,
&(this->m_dxDepthStencilView)
);
if ( FAILED(status) )
return status;
this->m_dxDeviceContext->OMSetRenderTargets ( 1, &(this->m_dxRenderTargetView), this->m_dxDepthStencilView );
//Set View Port (Can be commented out;
this->m_objViewport.Width = (FLOAT)dWidth;
this->m_objViewport.Height = (FLOAT)dHeight;
this->m_objViewport.MinDepth = 0.0;
this->m_objViewport.MaxDepth = 1.0;
this->m_objViewport.TopLeftX = 0;
this->m_objViewport.TopLeftY = 0;
this->m_dxDeviceContext->RSSetViewports ( 1, &(this->m_objViewport) );
//Setting up Shaders
//Compiling Vertex Shader file
ID3DBlob * dxVSBlob = NULL;
status = CompileShaderFromFile ( L"RTShaders.fx", "VS", "vs_4_0", &dxVSBlob );
if (FAILED (status))
{
dxVSBlob->Release ( );
return status;
}
//Creating Compiled Shader
status = this->m_dxDevice->CreateVertexShader ( dxVSBlob->GetBufferPointer ( ),
dxVSBlob->GetBufferSize ( ),
NULL,
&(this->m_dxVertexShader) );
if( FAILED(status) )
{
dxVSBlob->Release ( );
return status;
}
//Describe Layout
D3D11_INPUT_ELEMENT_DESC layout [] =
{
{
"POSITION",
0,
DXGI_FORMAT_R32G32B32_FLOAT,
0,
0,
D3D11_INPUT_PER_VERTEX_DATA,
0
},
/* {
"NORMAL",
0,
DXGI_FORMAT_R32G32B32A32_FLOAT,
0,
16,
D3D11_INPUT_PER_VERTEX_DATA,
0
},
*/ {
"COLOR",
0,
DXGI_FORMAT_R32G32B32_FLOAT,
0,
12, //NEED TO CHANGE THIS TO 32 WHEN UNCOMMENTING THE ABOVE BLOCK
D3D11_INPUT_PER_VERTEX_DATA,
0
},
};
UINT numElements = ARRAYSIZE(layout);
//Create Layout
status = this->m_dxDevice->CreateInputLayout ( layout,
numElements,
dxVSBlob->GetBufferPointer ( ),
dxVSBlob->GetBufferSize ( ),
&(this->m_dxVertexLayout) );
dxVSBlob->Release ( );
dxVSBlob = NULL;
if ( FAILED(status) )
{
return status;
}
//Set Vertex Layout to the pipeline
this->m_dxDeviceContext->IASetInputLayout ( this->m_dxVertexLayout );
//Compiling Pixel Shader File
ID3DBlob * dxPSBlob = NULL;
status = CompileShaderFromFile ( L"RTShaders.fx", "PS", "ps_4_0", &dxPSBlob );
if ( FAILED(status) )
{
if ( dxPSBlob )
dxPSBlob->Release ( );
return status;
}
//Creating Compiled Pixel Shader
status = this->m_dxDevice->CreatePixelShader (
dxPSBlob->GetBufferPointer ( ),
dxPSBlob->GetBufferSize ( ),
NULL,
&(this->m_dxPixelShader)
);
dxPSBlob->Release ( );
dxPSBlob = NULL;
if ( FAILED(status) )
{
return status;
}
return S_OK;
}
HRESULT CRenderer::CreateVertexBuffer ( )
{
HRESULT status = S_OK;
D3D11_BUFFER_DESC objBufferDesc;
D3D11_SUBRESOURCE_DATA objSubresData;
UINT dStride = sizeof (SVertex);
UINT dOffset = 0;
ZeroMemory(&objBufferDesc, sizeof(objBufferDesc));
ZeroMemory(&objSubresData, sizeof(objSubresData));
objBufferDesc.ByteWidth = sizeof(SVertex) * 1681;
objBufferDesc.Usage = D3D11_USAGE_DEFAULT;
objBufferDesc.BindFlags = D3D11_BIND_VERTEX_BUFFER;
objBufferDesc.CPUAccessFlags = 0;
objSubresData.pSysMem = pVertexData;
status = this->m_dxDevice->CreateBuffer (
&objBufferDesc,
&objSubresData,
&(this->m_dxVertexBuffer)
);
if ( FAILED(status) )
return status;
this->m_dxDeviceContext->IASetVertexBuffers ( 0, 1, &(this->m_dxVertexBuffer), &dStride, &dOffset );
this->m_dxDeviceContext->IASetPrimitiveTopology ( D3D11_PRIMITIVE_TOPOLOGY_POINTLIST );
return S_OK;
}
HRESULT CRenderer::CreateConstantBuffer ( )
{
HRESULT status = S_OK;
D3D11_BUFFER_DESC objBufferDesc;
ZeroMemory(&objBufferDesc, sizeof(objBufferDesc));
objBufferDesc.ByteWidth = sizeof(SConstantBuffer) + (16 - sizeof(SConstantBuffer)%16);
objBufferDesc.Usage = D3D11_USAGE_DEFAULT;
objBufferDesc.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
objBufferDesc.CPUAccessFlags = 0;
status = this->m_dxDevice->CreateBuffer (
&objBufferDesc,
NULL,
&(this->m_dxConstantBuffer)
);
return status;
}
HRESULT CRenderer::Render ( )
{
HRESULT status = S_OK;
RECT screenRect;
SConstantBuffer objConstBuffer;
float pClearColor [4] = { 0.0f, 0.125f, 0.5f, 1.0f };
this->m_dxDeviceContext->ClearRenderTargetView ( this->m_dxRenderTargetView, pClearColor );
this->m_dxDeviceContext->ClearDepthStencilView ( this->m_dxDepthStencilView, D3D11_CLEAR_DEPTH, 1.0f, 0 );
GetClientRect ( this->m_hWnd, &screenRect );
objConstBuffer.f4Origin = XMFLOAT3 ( 0.0f, 0.0f, 0.0f );
objConstBuffer.f4Direction = XMFLOAT3 ( 0.0f, 0.0f, 1.0f );
objConstBuffer.fDistanceFromPlane = 2.0f;
objConstBuffer.dScreenWidth = screenRect.right - screenRect.left;
objConstBuffer.dScreenHeight = screenRect.bottom - screenRect.top;
this->m_dxDeviceContext->UpdateSubresource ( this->m_dxConstantBuffer, 0, NULL, &objConstBuffer, 0, 0 );
this->m_dxDeviceContext->VSSetShader ( this->m_dxVertexShader, NULL, 0 );
this->m_dxDeviceContext->VSSetConstantBuffers ( 0, 1, &(this->m_dxConstantBuffer) );
this->m_dxDeviceContext->PSSetShader ( this->m_dxPixelShader, NULL, 0 );
this->m_dxDeviceContext->Draw ( 1680, 0 );
this->m_dxSwapChain->Present ( 0, 0 );
return status;
}
CRenderer::~CRenderer ( )
{
if ( this->m_dxDeviceContext )
this->m_dxDeviceContext->ClearState ( );
if ( this->m_dxPixelShader )
this->m_dxPixelShader->Release ( );
this->m_dxPixelShader = NULL;
if ( this->m_dxVertexLayout )
this->m_dxVertexLayout->Release ( );
this->m_dxVertexLayout = NULL;
if ( this->m_dxVertexBuffer )
this->m_dxVertexBuffer->Release ( );
this->m_dxVertexBuffer = NULL;
if ( this->m_dxDepthStencilBuffer )
this->m_dxDepthStencilBuffer->Release ( );
this->m_dxDepthStencilBuffer = NULL;
if ( this->m_dxDepthStencilView )
this->m_dxDepthStencilView->Release ( );
this->m_dxDepthStencilView = NULL;
if ( this->m_dxRenderTargetView )
this->m_dxRenderTargetView->Release ( );
this->m_dxRenderTargetView = NULL;
if ( this->m_dxBackBuffer->Release ( ) )
this->m_dxBackBuffer->Release ( );
this->m_dxBackBuffer = NULL;
if ( this->m_dxSwapChain )
this->m_dxSwapChain->Release ( );
this->m_dxSwapChain = NULL;
if ( this->m_dxDeviceContext )
this->m_dxDeviceContext->Release ( );
this->m_dxDeviceContext = NULL;
if ( this->m_dxDevice )
this->m_dxDevice->Release ( );
this->m_dxDevice = NULL;
}
什么都没有在屏幕上渲染，我应该看到点或一个大的白色补丁，但我看到的只是渲染目标已清除。我一直在运行 Pix，PreVS 和 PostVS 转换看起来不错。请帮忙！