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I am trying to pass in a uint4 into the shader but my input layout keeps failing when trying to load the shader.

shader.fx

uint4  values : UINT4_0;  // VertexInput

Input layout

{ "UINT4", 0, DXGI_FORMAT_R32G32B32A32_UINT, 0, 0, D3D10_INPUT_PER_VERTEX_DATA, 0 }

Does that seem right?

I am a bit confused why there is an error here.

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What is the error? –  Josh Petrie♦ Jan 9 '14 at 23:51
    
@JoshPetrie I haven't written the handle for the Sysout for the error. My program just crashes trying to CreateInputLayout which almost 100% of time for me was because of an error in the input description. And this was the only thing I changed which caused to me to get the error. And I can't for the life of me figure where the input description is not correct. This issue was also caused when I tried to input a semantic that had a number attached to it...i.e. "FLOAT4_0" and "UINT4_0", however input semantics like "COLOR0" and "POSITION0" always work. –  bluejamesbond Jan 9 '14 at 23:54
    
For a semantic called UINT4_0 in the shader, you probably need to set the name to "UINT4_" in the input layout, not "UINT4". –  Nathan Reed Jan 10 '14 at 1:40
    
@NathanReed Yes, that works. I have added that to answer. –  bluejamesbond Jan 10 '14 at 5:08

1 Answer 1

up vote 0 down vote accepted

I found a way to do this and I thought I will post it here since it will help others. In order to pass in a UINT4 into an HLSL, you must have the following:

1. InputLayout

{ "UINT4_", 0, DXGI_FORMAT_R32G32B32A32_UINT, 0, D3D10_APPEND_ALIGNED_ELEMENT, D3D10_INPUT_PER_VERTEX_DATA, 0 }

2. InputVertex

 uint4 valuesUnsigned: UINT4_0;

3. Input Data Structure

struct UINT4__
    {
        unsigned int a1;
        unsigned int a2;
        unsigned int a3;
        unsigned int a4;

        UINT4__(){};

        UINT4__(unsigned int x, unsigned int y, unsigned int z, unsigned int w)
        {
            a1 = x;
            a2 = y;
            a3 = z;
            a4 = w;
        }
    };

EDIT: Added what NathanReed has said in one of his comments on this question.

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