From 4128c7b31131764dc893213de17cd3224aec2330 Mon Sep 17 00:00:00 2001 From: smix8 <52464204+smix8@users.noreply.github.com> Date: Tue, 21 May 2024 00:53:21 +0200 Subject: [PATCH] Remove duplicated vertices after 3D NavigationMesh bake Removes duplicated vertices that may exist on shared polygon corners after a ReCast navigation mesh bake. --- .../navigation/3d/nav_mesh_generator_3d.cpp | 26 ++++++++++++++++--- 1 file changed, 22 insertions(+), 4 deletions(-) diff --git a/modules/navigation/3d/nav_mesh_generator_3d.cpp b/modules/navigation/3d/nav_mesh_generator_3d.cpp index cc3bbdbf01e..df0bdc95376 100644 --- a/modules/navigation/3d/nav_mesh_generator_3d.cpp +++ b/modules/navigation/3d/nav_mesh_generator_3d.cpp @@ -895,9 +895,22 @@ void NavMeshGenerator3D::generator_bake_from_source_geometry_data(Ref nav_vertices; + HashMap recast_vertex_to_native_index; + LocalVector 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 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); } }