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Support OBJ specified only a part of vertex colors

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The omitted vertex colors are treated as (0, 0, 0, 1).

e.g

v  0.0  0.0  0.0
v  0.0  0.0  1.0  0.0  0.0  0.0
v  0.0  1.0  0.0
v  1.0  0.0  0.0  1.0  0.6  0.3
v  1.0  1.0  0.0
This commit is contained in:
emaame
2023-06-14 21:02:40 +09:00
parent 9c54540a19
commit 22c8d97b54
4 changed files with 67 additions and 2 deletions
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8
code/AssetLib/Obj/ObjFileParser.cpp
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@@ -156,9 +156,17 @@ void ObjFileParser::parseFile(IOStreamBuffer<char> &streamBuffer) {
// read in vertex definition (homogeneous coords)
getHomogeneousVector3(m_pModel->mVertices);
} else if (numComponents == 6) {
// fill previous omitted vertex-colors by default
if (m_pModel->mVertexColors.size() < m_pModel->mVertices.size()) {
m_pModel->mVertexColors.resize(m_pModel->mVertices.size(), aiVector3D(0, 0, 0));
}
// read vertex and vertex-color
getTwoVectors3(m_pModel->mVertices, m_pModel->mVertexColors);
}
// append omitted vertex-colors as default for the end if any vertex-color exists
if (!m_pModel->mVertexColors.empty() && m_pModel->mVertexColors.size() < m_pModel->mVertices.size()) {
m_pModel->mVertexColors.resize(m_pModel->mVertices.size(), aiVector3D(0, 0, 0));
}
} else if (*m_DataIt == 't') {
// read in texture coordinate ( 2D or 3D )
++m_DataIt;