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Fix blendshapes on planar meshes

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David Rowe 2020-08-29 16:12:10 +12:00
parent 128745ef36
commit 5d02e0fe28
1 changed files with 8 additions and 6 deletions
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14
libraries/fbx/src/GLTFSerializer.cpp
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@ -1610,12 +1610,14 @@ bool GLTFSerializer::buildGeometry(HFMModel& hfmModel, const hifi::VariantHash&
} }
} }
// Add epsilon to mesh extents to compensate for planar meshes // Mesh extents must be at least minimum entity size, in particular for blendshapes to work on planar meshes.
mesh.meshExtents.minimum -= glm::vec3(EPSILON, EPSILON, EPSILON); const float ENTITY_ITEM_MIN_DIMENSION = 0.001f;
mesh.meshExtents.maximum += glm::vec3(EPSILON, EPSILON, EPSILON); auto delta = glm::max(glm::vec3(ENTITY_ITEM_MIN_DIMENSION) - mesh.meshExtents.size(), glm::vec3(0.0f)) / 2.0f;
hfmModel.meshExtents.minimum -= glm::vec3(EPSILON, EPSILON, EPSILON); mesh.meshExtents.minimum -= delta;
hfmModel.meshExtents.maximum += glm::vec3(EPSILON, EPSILON, EPSILON); mesh.meshExtents.maximum += delta;
hfmModel.meshExtents.minimum -= delta;
hfmModel.meshExtents.maximum += delta;
mesh.meshIndex = hfmModel.meshes.size(); mesh.meshIndex = hfmModel.meshes.size();
} }
++nodecount; ++nodecount;