[英]Direct3D11 wrong vertex transformations in vertex shader
我正在嘗試運行D3D 11渲染系統來加載和渲染FBX文件但我在頂點着色器中轉換頂點時遇到了問題。
我不認為有什么問題,在Visual Studio圖形調試器中,我可以看到傳遞給管道的網格在輸入匯編程序階段是正常的,但是在頂點着色器轉換之后所有突發並渲染出錯,如果有人可以告訴我出了什么問題我會很感激這些信息。
這是頂點着色器代碼
cbuffer MatrixBuffer
{
matrix worldMatrix;
matrix viewMatrix;
matrix projectionMatrix;
};
struct VertexInputType
{
float4 position : POSITION;
float3 normal : NORMAL;
float2 uv : TEXCOORD;
};
struct PixelInputType
{
float4 position : SV_POSITION;
float3 normal : NORMAL;
float2 uv : TEXCOORD;
};
PixelInputType TextureVertexShader(VertexInputType input)
{
PixelInputType output;
output.position = mul(input.position, worldMatrix);
output.position = mul(output.position, viewMatrix);
output.position = mul(output.position, projectionMatrix);
output.normal = input.normal;
output.uv = input.uv;
return output;
}
這是矩陣初始化的代碼
float lFieldOfView = 3.141592f * 0.4f;
float lScreenAspect = static_cast<float>(width_) / static_cast<float>(height_);
DirectX::XMMATRIX lProjection = MatrixDirectX::XMMatrixPerspectiveFovLHlFieldOfView, lScreenAspect, 1.0f, 10000.0f);
DirectX::XMStoreFloat4x4(&lMatrixBuffer.projectionMatrix, lProjectionMatrix);
DirectX::XMMATRIX lWorldMatrix = DirectX::XMMatrixIdentity();
DirectX::XMStoreFloat4x4(&lMatrixBuffer.worldMatrix, lWorldMatrix);
DirectX::XMFLOAT3 lookAtPos(0.0f, 0.0f, 0.0f);
DirectX::XMFLOAT3 eyePos(0.0f, 0.0f, -50.0f);
DirectX::XMFLOAT3 upDir(0.0f, 1.0f, 0.0f);
DirectX::FXMVECTOR lLookAtPos = DirectX::XMLoadFloat3(&lookAtPos);
DirectX::FXMVECTOR lEyePos = DirectX::XMLoadFloat3(&eyePos);
DirectX::FXMVECTOR lUpDir = DirectX::XMLoadFloat3(&upDir);
DirectX::XMMATRIX lViewMatrix = DirectX::XMMatrixLookAtLH(lEyePos, lLookAtPos, lUpDir);
DirectX::XMStoreFloat4x4(&lMatrixBuffer.viewMatrix, lViewMatrix);
D3D11_BUFFER_DESC lBufferDesc = { 0 };
lBufferDesc.ByteWidth = sizeof(MatrixBufferType);
lBufferDesc.Usage = D3D11_USAGE_DYNAMIC;
lBufferDesc.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
lBufferDesc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
D3D11_SUBRESOURCE_DATA lMatrixBufferData;
lMatrixBufferData.pSysMem = &lMatrixBuffer;
hResult = D3DDevice_->CreateBuffer(&lBufferDesc, &lMatrixBufferData, &D3DMatrixBuffer_);
從評論看來,問題實際上可能是矩陣行 - 主要/列 - 主要差異。 如果矩陣將轉換到CPU端,原始的HLSL代碼可能會起作用。
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