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Remove duplicated vertices after 3D NavigationMesh bake 

Removes duplicated vertices that may exist on shared polygon corners after a ReCast navigation mesh bake.
This commit is contained in:
smix8 2024-05-21 00:53:21 +02:00
parent 40b4130c93
commit 4128c7b311
1 changed files with 22 additions and 4 deletions
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26
modules/navigation/3d/nav_mesh_generator_3d.cpp
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@ -895,9 +895,22 @@ void NavMeshGenerator3D::generator_bake_from_source_geometry_data(Ref<Navigation
Vector<Vector3> nav_vertices;
HashMap<Vector3, int> recast_vertex_to_native_index;
LocalVector<int> recast_index_to_native_index;
recast_index_to_native_index.resize(detail_mesh->nverts);
for (int i = 0; i < detail_mesh->nverts; i++) {
const float *v = &detail_mesh->verts[i * 3];
nav_vertices.push_back(Vector3(v[0], v[1], v[2]));
const Vector3 vertex = Vector3(v[0], v[1], v[2]);
int *existing_index_ptr = recast_vertex_to_native_index.getptr(vertex);
if (!existing_index_ptr) {
int new_index = recast_vertex_to_native_index.size();
recast_index_to_native_index[i] = new_index;
recast_vertex_to_native_index[vertex] = new_index;
nav_vertices.push_back(vertex);
} else {
recast_index_to_native_index[i] = *existing_index_ptr;
}
}
p_navigation_mesh->set_vertices(nav_vertices);
p_navigation_mesh->clear_polygons();
@ -912,9 +925,14 @@ void NavMeshGenerator3D::generator_bake_from_source_geometry_data(Ref<Navigation
Vector<int> nav_indices;
nav_indices.resize(3);
// Polygon order in recast is opposite than godot's
nav_indices.write[0] = ((int)(detail_mesh_bverts + detail_mesh_tris[j * 4 + 0]));
nav_indices.write[1] = ((int)(detail_mesh_bverts + detail_mesh_tris[j * 4 + 2]));
nav_indices.write[2] = ((int)(detail_mesh_bverts + detail_mesh_tris[j * 4 + 1]));
int index1 = ((int)(detail_mesh_bverts + detail_mesh_tris[j * 4 + 0]));
int index2 = ((int)(detail_mesh_bverts + detail_mesh_tris[j * 4 + 2]));
int index3 = ((int)(detail_mesh_bverts + detail_mesh_tris[j * 4 + 1]));
nav_indices.write[0] = recast_index_to_native_index[index1];
nav_indices.write[1] = recast_index_to_native_index[index2];
nav_indices.write[2] = recast_index_to_native_index[index3];
p_navigation_mesh->add_polygon(nav_indices);
}
}