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What's wrong about my code?


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#1 blackfe2010   Members   -  Reputation: 150

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Posted 15 December 2012 - 09:54 AM

Hi

I want display a model. but there is something wrong.

I use PIX to see what's wrong, and I find the data is malposition.

This is the data what my program drew
VTX IDX POSITION[0] POSITION[1] POSITION[2] POSITION[3] TEXCOORD[0] TEXCOORD[1]
0 1 0.453 0.78 0.14 1 61.198 -14.418
1 2 61.198 -14.418 0.453 1 0.653 -7.689
2 0 0.024 55.081 -2.898 1 0.453 0.78

but the correct one is:

VTX IDX POSITION[0] POSITION[1] POSITION[2] POSITION[3] TEXCOORD[0] TEXCOORD[1]
0 1 0.14 61.198 -14.418 1 0.453 0.653
1 2 -7.689 61.197 -11.877 1 0.39 0.653
2 0 0.024 55.081 -2.898 1 0.453 0.78

the issue start at index 1 POSITION[0] and POSITION[1],
They re-use index 0 TEXCOORD[0] and TEXCOORD[1],

And I see the input layout, it is correct.
SemanticName SemanticIndex Format InputSlot AlignedByteOffset InputSlotClass InstanceDataStepRate
POSITION 0 DXGI_FORMAT_R32G32B32_FLOAT 0 0 D3D11_INPUT_PER_VERTEX_DATA 0
TEXCOORD 0 DXGI_FORMAT_R32G32_FLOAT 0 12 D3D11_INPUT_PER_VERTEX_DATA 0

In the .fx file

struct VSInputTexture
{
float4 pos : POSITION;
float2 tex0 : TEXCOORD0;
};

I use a struct in c++

struct VertexTexStr
{
XMFLOAT3 pos;
XMFLOAT2 tex;
};

I used D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST and
create vertex buffer:
[source lang="cpp"]void RenderObject::CreateVertexBuffer(){ try { D3D11_BUFFER_DESC bufferDesc; ZeroMemory( &bufferDesc, sizeof( bufferDesc ) ); D3D11_SUBRESOURCE_DATA initData; ZeroMemory( &initData, sizeof( initData ) ); VertexTexStr* tmpVertexTex=NULL; bufferDesc.Usage=D3D11_USAGE_DEFAULT; bufferDesc.BindFlags=D3D11_BIND_VERTEX_BUFFER; bufferDesc.CPUAccessFlags=0; bufferDesc.MiscFlags=0; bufferDesc.StructureByteStride=0; switch(m_mode) { case RenderWithCameraWithTexture: bufferDesc.ByteWidth=sizeof(VertexTexStr)*m_vertices->size(); tmpVertexTex=new VertexTexStr[m_vertices->size()]; for(size_t i=0;i<m_vertices->size();i++) { tmpVertexTex[i].pos=(*m_vertices)[i]; tmpVertexTex[i].tex=(*m_texs)[i]; } initData.pSysMem=tmpVertexTex; sendMessage(MSG_CREATE_BUFFER,AuxGroupArgus(&bufferDesc,&initData,&m_verticesBuffer)); delete[] tmpVertexTex; break;[/source]

I use debug to see the initData.pSysMem, it is ok at index 1.
What's wrong?

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#2 Zaoshi Kaba   Crossbones+   -  Reputation: 3974

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Posted 15 December 2012 - 10:02 AM

When you call IASetVertexBuffers are you sure you set correct strides?

#3 blackfe2010   Members   -  Reputation: 150

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Posted 15 December 2012 - 09:01 PM

you are right. thank you




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