in Src/ModelLoadSDKMESH.cpp [197:371]
unsigned int GetInputLayoutDesc(
_In_reads_(32) const DXUT::D3DVERTEXELEMENT9 decl[],
ModelMeshPart::InputLayoutCollection& inputDesc)
{
static const D3D12_INPUT_ELEMENT_DESC s_elements[] =
{
{ "SV_Position", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
{ "NORMAL", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
{ "COLOR", 0, DXGI_FORMAT_B8G8R8A8_UNORM, 0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
{ "TANGENT", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
{ "BINORMAL", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
{ "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
{ "BLENDINDICES", 0, DXGI_FORMAT_R8G8B8A8_UINT, 0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
{ "BLENDWEIGHT", 0, DXGI_FORMAT_R8G8B8A8_UNORM, 0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
};
using namespace DXUT;
uint32_t offset = 0;
uint32_t texcoords = 0;
unsigned int flags = 0;
bool posfound = false;
for (size_t index = 0; index < DXUT::MAX_VERTEX_ELEMENTS; ++index)
{
if (decl[index].Usage == 0xFF)
break;
if (decl[index].Type == D3DDECLTYPE_UNUSED)
break;
if (decl[index].Offset != offset)
break;
if (decl[index].Usage == D3DDECLUSAGE_POSITION)
{
if (decl[index].Type == D3DDECLTYPE_FLOAT3)
{
inputDesc.push_back(s_elements[0]);
offset += 12;
posfound = true;
}
else
break;
}
else if (decl[index].Usage == D3DDECLUSAGE_NORMAL
|| decl[index].Usage == D3DDECLUSAGE_TANGENT
|| decl[index].Usage == D3DDECLUSAGE_BINORMAL)
{
size_t base = 1;
if (decl[index].Usage == D3DDECLUSAGE_TANGENT)
base = 3;
else if (decl[index].Usage == D3DDECLUSAGE_BINORMAL)
base = 4;
D3D12_INPUT_ELEMENT_DESC desc = s_elements[base];
bool unk = false;
switch (decl[index].Type)
{
case D3DDECLTYPE_FLOAT3: assert(desc.Format == DXGI_FORMAT_R32G32B32_FLOAT); offset += 12; break;
case D3DDECLTYPE_UBYTE4N: desc.Format = DXGI_FORMAT_R8G8B8A8_UNORM; flags |= BIASED_VERTEX_NORMALS; offset += 4; break;
case D3DDECLTYPE_SHORT4N: desc.Format = DXGI_FORMAT_R16G16B16A16_SNORM; offset += 8; break;
case D3DDECLTYPE_FLOAT16_4: desc.Format = DXGI_FORMAT_R16G16B16A16_FLOAT; offset += 8; break;
case D3DDECLTYPE_DXGI_R10G10B10A2_UNORM: desc.Format = DXGI_FORMAT_R10G10B10A2_UNORM; flags |= BIASED_VERTEX_NORMALS; offset += 4; break;
case D3DDECLTYPE_DXGI_R11G11B10_FLOAT: desc.Format = DXGI_FORMAT_R11G11B10_FLOAT; flags |= BIASED_VERTEX_NORMALS; offset += 4; break;
case D3DDECLTYPE_DXGI_R8G8B8A8_SNORM: desc.Format = DXGI_FORMAT_R8G8B8A8_SNORM; offset += 4; break;
#if (defined(_XBOX_ONE) && defined(_TITLE)) || defined(_GAMING_XBOX)
case D3DDECLTYPE_DEC3N: desc.Format = DXGI_FORMAT_R10G10B10_SNORM_A2_UNORM; offset += 4; break;
case (32 + DXGI_FORMAT_R10G10B10_SNORM_A2_UNORM): desc.Format = DXGI_FORMAT_R10G10B10_SNORM_A2_UNORM; offset += 4; break;
#else
case D3DDECLTYPE_DEC3N: desc.Format = DXGI_FORMAT_R10G10B10A2_UNORM; flags |= USES_OBSOLETE_DEC3N; offset += 4; break;
#endif
default:
unk = true;
break;
}
if (unk)
break;
inputDesc.push_back(desc);
}
else if (decl[index].Usage == D3DDECLUSAGE_COLOR)
{
D3D12_INPUT_ELEMENT_DESC desc = s_elements[2];
bool unk = false;
switch (decl[index].Type)
{
case D3DDECLTYPE_FLOAT4: desc.Format = DXGI_FORMAT_R32G32B32A32_FLOAT; offset += 16; break;
case D3DDECLTYPE_D3DCOLOR: assert(desc.Format == DXGI_FORMAT_B8G8R8A8_UNORM); offset += 4; break;
case D3DDECLTYPE_UBYTE4N: desc.Format = DXGI_FORMAT_R8G8B8A8_UNORM; offset += 4; break;
case D3DDECLTYPE_FLOAT16_4: desc.Format = DXGI_FORMAT_R16G16B16A16_FLOAT; offset += 8; break;
case D3DDECLTYPE_DXGI_R10G10B10A2_UNORM: desc.Format = DXGI_FORMAT_R10G10B10A2_UNORM; offset += 4; break;
case D3DDECLTYPE_DXGI_R11G11B10_FLOAT: desc.Format = DXGI_FORMAT_R11G11B10_FLOAT; offset += 4; break;
default:
unk = true;
break;
}
if (unk)
break;
flags |= PER_VERTEX_COLOR;
inputDesc.push_back(desc);
}
else if (decl[index].Usage == D3DDECLUSAGE_TEXCOORD)
{
D3D12_INPUT_ELEMENT_DESC desc = s_elements[5];
desc.SemanticIndex = decl[index].UsageIndex;
bool unk = false;
switch (decl[index].Type)
{
case D3DDECLTYPE_FLOAT1: desc.Format = DXGI_FORMAT_R32_FLOAT; offset += 4; break;
case D3DDECLTYPE_FLOAT2: assert(desc.Format == DXGI_FORMAT_R32G32_FLOAT); offset += 8; break;
case D3DDECLTYPE_FLOAT3: desc.Format = DXGI_FORMAT_R32G32B32_FLOAT; offset += 12; break;
case D3DDECLTYPE_FLOAT4: desc.Format = DXGI_FORMAT_R32G32B32A32_FLOAT; offset += 16; break;
case D3DDECLTYPE_FLOAT16_2: desc.Format = DXGI_FORMAT_R16G16_FLOAT; offset += 4; break;
case D3DDECLTYPE_FLOAT16_4: desc.Format = DXGI_FORMAT_R16G16B16A16_FLOAT; offset += 8; break;
default:
unk = true;
break;
}
if (unk)
break;
++texcoords;
inputDesc.push_back(desc);
}
else if (decl[index].Usage == D3DDECLUSAGE_BLENDINDICES)
{
if (decl[index].Type == D3DDECLTYPE_UBYTE4)
{
flags |= SKINNING;
inputDesc.push_back(s_elements[6]);
offset += 4;
}
else
break;
}
else if (decl[index].Usage == D3DDECLUSAGE_BLENDWEIGHT)
{
if (decl[index].Type == D3DDECLTYPE_UBYTE4N)
{
flags |= SKINNING;
inputDesc.push_back(s_elements[7]);
offset += 4;
}
else
break;
}
else
break;
}
if (!posfound)
throw std::runtime_error("SV_Position is required");
if (texcoords == 2)
{
flags |= DUAL_TEXTURE;
}
return flags;
}