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Introduce extents for TriangleListMesh and calculate them

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This commit is contained in:
sabrina-shanman 2019-10-31 15:54:17 -07:00
parent 67e05a70d4
commit ba257634f2
3 changed files with 19 additions and 0 deletions
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1
libraries/hfm/src/hfm/HFM.h
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@ -235,6 +235,7 @@ struct TriangleListMesh {
std::vector<glm::vec3> vertices;
std::vector<uint32_t> indices;
std::vector<glm::ivec2> parts; // Offset in the indices, Number of indices
std::vector<Extents> partExtents; // Extents of each part with no transform applied. Same length as parts.
};
/// A single mesh (with optional blendshapes).

16
libraries/hfm/src/hfm/HFMModelMath.cpp
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@ -40,6 +40,20 @@ void thickenFlatExtents(Extents& extents) {
extents.maximum += glm::vec3(EPSILON, EPSILON, EPSILON);
}
void calculateExtentsForTriangleListMesh(TriangleListMesh& triangleListMesh) {
triangleListMesh.partExtents.resize(triangleListMesh.parts.size());
for (size_t partIndex = 0; partIndex < triangleListMesh.parts.size(); ++partIndex) {
const auto& part = triangleListMesh.parts[partIndex];
auto& extents = triangleListMesh.partExtents[partIndex];
int partEnd = part.x + part.y;
for (int i = part.x; i < partEnd; ++i) {
auto index = triangleListMesh.indices[i];
const auto& position = triangleListMesh.vertices[index];
extents.addPoint(position);
}
}
}
void calculateExtentsForShape(hfm::Shape& shape, const std::vector<hfm::Mesh>& meshes, const std::vector<hfm::Joint> joints) {
auto& shapeExtents = shape.transformedExtents;
shapeExtents.reset();
@ -196,6 +210,8 @@ const TriangleListMesh generateTriangleListMesh(const std::vector<glm::vec3>& sr
}
}
calculateExtentsForTriangleListMesh(dest);
return dest;
}

2
libraries/hfm/src/hfm/HFMModelMath.h
View file

@ -20,6 +20,8 @@ void forEachIndex(const hfm::MeshPart& meshPart, std::function<void(uint32_t)> f
void initializeExtents(Extents& extents);
void calculateExtentsForTriangleListMesh(TriangleListMesh& triangleListMesh);
// This can't be moved to model-baker until
void calculateExtentsForShape(hfm::Shape& shape, const std::vector<hfm::Mesh>& meshes, const std::vector<hfm::Joint> joints);