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Regularize deformable objects to fix excessive errors post deformation

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This significantly improves LOD quality for skinned objects, especially
if the skinned object geometry is very simple (e.g. planar or
cylindrical) in bind pose.

Co-authored-by: Hugo Locurcio <hugo.locurcio@hugo.pro>
This commit is contained in:
Arseny Kapoulkine 2025-08-22 20:26:47 -07:00
parent 2753d333f6
commit 92596e3f17
1 changed files with 11 additions and 1 deletions
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12
scene/resources/3d/importer_mesh.cpp
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@ -341,6 +341,8 @@ void ImporterMesh::generate_lods(float p_normal_merge_angle, Array p_bone_transf
}
}
bool deformable = bones.size() > 0 || blend_shapes.size() > 0;
if (bones.size() > 0 && weights.size() && bone_transform_vector.size() > 0) {
Vector3 *vertices_ptrw = vertices.ptrw();
@ -482,7 +484,15 @@ void ImporterMesh::generate_lods(float p_normal_merge_angle, Array p_bone_transf
PackedInt32Array new_indices;
new_indices.resize(index_count);
const int simplify_options = SurfaceTool::SIMPLIFY_LOCK_BORDER;
int simplify_options = 0;
// Lock geometric boundary in case the mesh is composed of multiple material subsets.
simplify_options |= SurfaceTool::SIMPLIFY_LOCK_BORDER;
if (deformable) {
// Improves appearance of deformable objects after deformation by using more regular tessellation.
simplify_options |= SurfaceTool::SIMPLIFY_REGULARIZE;
}
size_t new_index_count = SurfaceTool::simplify_with_attrib_func(
(unsigned int *)new_indices.ptrw(),