Silly Input Layout Problem

Jonathan Coleman · 2018-09-24T00:01:51

Hi all, I was changing my instance input from a D3DVector3 to D3DXMATRIX and I'm running into trouble. I chose DXGI_FORMAT_R16G16B16A16_FLOAT as the format for my matrix input, I don't know if this is right but it's not complaining, its for 64 bits and my matrix is 64 bits So I am running into this error: D3D11 ERROR: ID3D11Device::CreateInputLayout: The provided input signature expects to read an element with SemanticName/Index: 'INSTANCE'/1, but the declaration doesn't provide a matching name. [ STATE_CREATION ERROR #163: CREATEINPUTLAYOUT_MISSINGELEMENT] Actually 3 of them, 'INSTANCE'/1 'INSTANCE'/2 'INSTANCE'3 It's saying the declaration doesn't provide a matching name, I'm assuming its talking about this? VOut VShader(float4 position : POSITION, float4 color : COLOR, float4x4 instancePosition : INSTANCE) But its there? Here is all the code, this is probably a really silly oversight: My instance struct in my C++ code: struct Instance { D3DXMATRIX position; }; The input layout creation: bool Renderer::createInputLayout(ID3D11Device * dev, ID3D11DeviceContext * devcon, ID3D10Blob * Shader) { HRESULT hr; // create the input layout object D3D11_INPUT_ELEMENT_DESC ied[] = { { "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D11_INPUT_PER_VERTEX_DATA, 0 }, { "COLOR", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0, 12, D3D11_INPUT_PER_VERTEX_DATA, 0 }, { "INSTANCE", 0, DXGI_FORMAT_R16G16B16A16_FLOAT, 1, 0, D3D11_INPUT_PER_INSTANCE_DATA, 1 }, }; hr = dev->CreateInputLayout(ied, 3, Shader->GetBufferPointer(), Shader->GetBufferSize(), &pLayout); if (!FAILED(hr)) { devcon->IASetInputLayout(pLayout); return true; } else { return false; } } Finally, the shader code (Note, I also still need to figure out what to do with my new float4x4 as opposed to my float3 I was previously using): cbuffer ProjectionConstantBuffer : register(b0) { float4x4 projection; } cbuffer WorldConstantBuffer : register(b1) { float4x4 world; } struct VOut { float4 position : SV_POSITION; float4 color : COLOR; }; VOut VShader(float4 position : POSITION, float4 color : COLOR, float4x4 instancePosition : INSTANCE) { VOut output; // Apply all instance position translations //position.x += instancePosition.x; //position.y += instancePosition.y; //position.z += instancePosition.z; output.position = position; output.position = mul(position, world); // Apply world translation matrix output.position = mul(position, instancePosition); // Apply instance translation matrix output.position = mul(output.position, projection); // Apply ortho projection matrix output.color = color; // Apply color from vertex input return output; } Thanks for your help! EDIT: I learned that 'INSTANCE'/1, 'INSTANCE'/2, and 'INSTANCE'/3 could possibly be referring to something like this: D3D11_INPUT_ELEMENT_DESC ied[] = { { "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D11_INPUT_PER_VERTEX_DATA, 0 }, { "COLOR", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0, 12, D3D11_INPUT_PER_VERTEX_DATA, 0 }, { "INSTANCE", 0,DXGI_FORMAT_R32G32B32A32_FLOAT, 1, 0, D3D11_INPUT_PER_INSTANCE_DATA, 1 }, { "INSTANCE", 1,DXGI_FORMAT_R32G32B32A32_FLOAT, 1, 0, D3D11_INPUT_PER_INSTANCE_DATA, 1 }, { "INSTANCE", 2,DXGI_FORMAT_R32G32B32A32_FLOAT, 1, 0, D3D11_INPUT_PER_INSTANCE_DATA, 1 }, { "INSTANCE", 3,DXGI_FORMAT_R32G32B32A32_FLOAT, 1, 0, D3D11_INPUT_PER_INSTANCE_DATA, 1 }, }; But unfortunately, I'm still missing something, as I am getting the same error. Is there something I need to do with the aligned byte offset? There is some science here I'm definitely not picking up on.

Graphics and GPU Programming Programming

Started by JWColeman September 21, 2018 05:58 PM

10 comments, last by MJP 6 years, 4 months ago

MJP

20,297

September 24, 2018 12:01 AM

The OP's VS code is fine, the shader compiler automatically converts a float4x4 to to 4 float4 attributes in the input signature (with sequential semantic indices).

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