Question

所以，我试图在着色器中获取常量缓冲区，以使投影矩阵正交...

有人可以告诉我为什么我现在尝试不渲染吗？

我假设我需要制作两个映射的子资源和两个缓冲区，一个用于顶点，另一个用于常量，这可能是错误的吗？

这是我的代码：

    Vertex OurVertices[] =
{
    { D3DXVECTOR2(-0.5f,-0.5f), D3DXCOLOR(0.0f, 0.0f, 0.0f, 1.0f) },
    { D3DXVECTOR2(-0.5f,0.5f), D3DXCOLOR(0.0f, 1.0f, 0.0f, 1.0f) },
    { D3DXVECTOR2(0.5f,0.5f), D3DXCOLOR(0.0f, 0.0f, 1.0f, 1.0f) },
    { D3DXVECTOR2(-0.5f,-0.5f), D3DXCOLOR(1.0f, 0.0f, 0.0f, 1.0f) },
    { D3DXVECTOR2(0.5f,0.5f), D3DXCOLOR(0.0f, 1.0f, 0.0f, 1.0f) },
    { D3DXVECTOR2(0.5f,-0.5f), D3DXCOLOR(0.0f, 0.0f, 1.0f, 1.0f) }
};


// create the vertex buffer
D3D11_BUFFER_DESC vertexBufferDesc;
ZeroMemory(&vertexBufferDesc, sizeof(vertexBufferDesc));

vertexBufferDesc.Usage = D3D11_USAGE_DYNAMIC;                // write access access by CPU and GPU
vertexBufferDesc.ByteWidth = sizeof(Vertex) * 6;             // size is the VERTEX struct * 3
vertexBufferDesc.BindFlags = D3D11_BIND_VERTEX_BUFFER;       // use as a vertex buffer
vertexBufferDesc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;    // allow CPU to write in buffer
dev->CreateBuffer(&vertexBufferDesc, NULL, &pVBuffer);       // create the buffer
D3D11_MAPPED_SUBRESOURCE ms_Vertex;
devcon->Map(pVBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &ms_Vertex);   
memcpy(ms_Vertex.pData, OurVertices, sizeof(OurVertices));                 // copy the data
devcon->Unmap(pVBuffer, NULL);                                      // unmap the buffer
devcon->VSSetConstantBuffers(NULL, 1, &pVBuffer);       // Finanly set the constant buffer in the vertex shader with the updated values.


MatrixBufferType* dataPtr;
D3D11_BUFFER_DESC constantBufferDesc;   // create the constant buffer

ZeroMemory(&constantBufferDesc, sizeof(constantBufferDesc));

constantBufferDesc.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
constantBufferDesc.Usage = D3D11_USAGE_DYNAMIC;
constantBufferDesc.ByteWidth = sizeof(MatrixBufferType);
constantBufferDesc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
constantBufferDesc.MiscFlags = 0;
constantBufferDesc.StructureByteStride = 0;
dev->CreateBuffer(&constantBufferDesc, NULL, &pCBuffer);       // create the buffer

D3D11_MAPPED_SUBRESOURCE ms_CBuffer;
devcon->Map(pCBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &ms_CBuffer);
D3DXMatrixOrthoLH(&m_orthoMatrix, SCREEN_WIDTH, SCREEN_HEIGHT, 0, 1);
D3DXMatrixTranspose(&m_orthoMatrix, &m_orthoMatrix);
dataPtr = (MatrixBufferType*)ms_CBuffer.pData;
dataPtr->projection = m_orthoMatrix;
memcpy(ms_CBuffer.pData, &dataPtr, sizeof(MatrixBufferType));
devcon->Unmap(pCBuffer, NULL);
devcon->VSSetConstantBuffers(NULL, 1, &pCBuffer);       // Finally set the constant buffer in the vertex shader with the updated values.

因此，尝试将投影矩阵用于着色器代码：

cbuffer ConstantBuffer
{
matrix world;
matrix view;
matrix projection;
};

VOut VShader(float4 position : POSITION, float4 color : COLOR)
{
VOut output;

output.position = position;
output.position = mul(output.position, projection);
output.color = color;

return output;
}

使最初渲染的四边形消失。

这使我相信自己做错了，我只是不知道什么。

设置常量缓冲区Directx

0 个答案: