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simpler

DX11 Problem sending vertex data to shader

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simpler    927
For some reason the vertex data wont be transfered correctly from the vertex buffer to the vertex shader.

This is the c++ vertex structure:

[CODE]
//! Vertex with skinning info.
struct SkinnedVertex
{
XMFLOAT3 Pos;
XMFLOAT3 Normal;
XMFLOAT2 Tex;
XMFLOAT4 Tangent;
XMFLOAT3 Weights;
BYTE BoneIndices[4];
};
[/CODE]

This is the HLSL structure:

[CODE]
//! Input vertex data.
struct SkinnedVertexIn
{
float3 PosL : POSITION;
float3 NormalL : NORMAL;
float2 Tex : TEXCOORD;
float4 TangentL : TANGENT;
float3 Weights : WEIGHTS;
uint4 BoneIndices : BONEINDICES;
};
[/CODE]

And this is the input layout:

[CODE]
// Create the vertex input layout.
D3D11_INPUT_ELEMENT_DESC vertexDesc[6] =
{
{"POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D11_INPUT_PER_VERTEX_DATA, 0},
{"NORMAL", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 12, D3D11_INPUT_PER_VERTEX_DATA, 0},
{"TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, 24, D3D11_INPUT_PER_VERTEX_DATA, 0},
{"TANGENT", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0, 32, D3D11_INPUT_PER_VERTEX_DATA, 0},
{"WEIGHTS", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 48, D3D11_INPUT_PER_VERTEX_DATA, 0},
{"BONEINDICES", 0, DXGI_FORMAT_R8G8B8A8_UINT, 0, 60, D3D11_INPUT_PER_VERTEX_DATA, 0}
};
// Create the input layout.
D3DX11_PASS_DESC passDesc;
mTech->GetPassByIndex(0)->GetDesc(&passDesc);
HR(gGame->GetD3D()->GetDevice()->CreateInputLayout(vertexDesc, 6, passDesc.pIAInputSignature,
passDesc.IAInputSignatureSize, &mInputLayout));
[/CODE]

This is what it looks like in PIX:

[img]http://i.imgur.com/uRMgb.png[/img]

As you can see the position, normal, texcoord and tangent are transfered correctly. But the weights and bone indices are totally wrong. I have no idea why and I have realised I won't be able to solve this on my own, I really appreciate any help. Also, it seems kinda weird that the tangent is shown as a float3 in PIX when it's acctually a float4.

If you need more information in order to help let me know. Thanks!

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simpler    927
I didn't know that. What format should I use instead? But I don't understand how that can affect and make the weights data wrong as well. Perhaps you can explain? Edited by simpler

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kauna    2922
[quote]DXGI_FORMAT_R8G8B8A8_UINT is not equal to uint4.[/quote]

Strange, I use exactly the same setup and it works for me. Except for the weights I use just one dword, since the values are between 0..1 and 8-bit accuracy is enough.

I use DXGI_FORMAT_R8G8B8A8_UINT in the input layout and uint4 in the hlsl vertex structure.
Otherwise, I store the bone indices in a dword but that's same as 4 bytes.

You can use D3D11_APPEND_ALIGNED_ELEMENT instead of calculating the offsets yourself.

Cheers! Edited by kauna

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MJP    19788
[quote name='Nik02' timestamp='1348469789' post='4983126']
DXGI_FORMAT_R8G8B8A8_UINT is not equal to uint4.
[/quote]

That's not true. The UINT suffix specifies that each component should be interpreted as an 8-bit unsigned integer, and there are 4 values so uint4 is the appropriate type to use in this case.

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