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Fix LOD-generation on skinned meshes.

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This commit is contained in:
SaracenOne
2022-09-07 20:13:10 +01:00
parent 200b9cde88
commit 13f5c62124
5 changed files with 79 additions and 4 deletions
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41
scene/resources/importer_mesh.cpp
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@@ -254,7 +254,20 @@ void ImporterMesh::set_surface_material(int p_surface, const Ref<Material> &p_ma
mesh.unref();
}
void ImporterMesh::generate_lods(float p_normal_merge_angle, float p_normal_split_angle) {
#define VERTEX_SKIN_FUNC(bone_count, vert_idx, read_array, write_array, transform_array, bone_array, weight_array) \
Vector3 transformed_vert = Vector3(); \
for (unsigned int weight_idx = 0; weight_idx < bone_count; weight_idx++) { \
int bone_idx = bone_array[vert_idx * bone_count + weight_idx]; \
float w = weight_array[vert_idx * bone_count + weight_idx]; \
if (w < FLT_EPSILON) { \
continue; \
} \
ERR_FAIL_INDEX(bone_idx, static_cast<int>(transform_array.size())); \
transformed_vert += transform_array[bone_idx].xform(read_array[vert_idx]) * w; \
} \
write_array[vert_idx] = transformed_vert;
void ImporterMesh::generate_lods(float p_normal_merge_angle, float p_normal_split_angle, Array p_bone_transform_array) {
if (!SurfaceTool::simplify_scale_func) {
return;
}
@@ -265,6 +278,12 @@ void ImporterMesh::generate_lods(float p_normal_merge_angle, float p_normal_spli
return;
}
LocalVector<Transform3D> bone_transform_vector;
for (int i = 0; i < p_bone_transform_array.size(); i++) {
ERR_FAIL_COND(p_bone_transform_array[i].get_type() != Variant::TRANSFORM3D);
bone_transform_vector.push_back(p_bone_transform_array[i]);
}
for (int i = 0; i < surfaces.size(); i++) {
if (surfaces[i].primitive != Mesh::PRIMITIVE_TRIANGLES) {
continue;
@@ -276,6 +295,8 @@ void ImporterMesh::generate_lods(float p_normal_merge_angle, float p_normal_spli
Vector<Vector3> normals = surfaces[i].arrays[RS::ARRAY_NORMAL];
Vector<Vector2> uvs = surfaces[i].arrays[RS::ARRAY_TEX_UV];
Vector<Vector2> uv2s = surfaces[i].arrays[RS::ARRAY_TEX_UV2];
Vector<int> bones = surfaces[i].arrays[RS::ARRAY_BONES];
Vector<float> weights = surfaces[i].arrays[RS::ARRAY_WEIGHTS];
unsigned int index_count = indices.size();
unsigned int vertex_count = vertices.size();
@@ -301,6 +322,22 @@ void ImporterMesh::generate_lods(float p_normal_merge_angle, float p_normal_spli
}
}
if (bones.size() > 0 && weights.size() && bone_transform_vector.size() > 0) {
Vector3 *vertices_ptrw = vertices.ptrw();
// Apply bone transforms to regular surface.
unsigned int bone_weight_length = surfaces[i].flags & Mesh::ARRAY_FLAG_USE_8_BONE_WEIGHTS ? 8 : 4;
const int *bo = bones.ptr();
const float *we = weights.ptr();
for (unsigned int j = 0; j < vertex_count; j++) {
VERTEX_SKIN_FUNC(bone_weight_length, j, vertices_ptr, vertices_ptrw, bone_transform_vector, bo, we)
}
vertices_ptr = vertices.ptr();
}
float normal_merge_threshold = Math::cos(Math::deg_to_rad(p_normal_merge_angle));
float normal_pre_split_threshold = Math::cos(Math::deg_to_rad(MIN(180.0f, p_normal_split_angle * 2.0f)));
float normal_split_threshold = Math::cos(Math::deg_to_rad(p_normal_split_angle));
@@ -1246,7 +1283,7 @@ void ImporterMesh::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_surface_name", "surface_idx", "name"), &ImporterMesh::set_surface_name);
ClassDB::bind_method(D_METHOD("set_surface_material", "surface_idx", "material"), &ImporterMesh::set_surface_material);
ClassDB::bind_method(D_METHOD("generate_lods", "normal_merge_angle", "normal_split_angle"), &ImporterMesh::generate_lods);
ClassDB::bind_method(D_METHOD("generate_lods", "normal_merge_angle", "normal_split_angle", "bone_transform_array"), &ImporterMesh::generate_lods);
ClassDB::bind_method(D_METHOD("get_mesh", "base_mesh"), &ImporterMesh::get_mesh, DEFVAL(Ref<ArrayMesh>()));
ClassDB::bind_method(D_METHOD("clear"), &ImporterMesh::clear);