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extern/draco/dracoenc/src/draco/mesh/mesh_misc_functions.cc
- This file was added.
| // Copyright 2016 The Draco Authors. | |||||
| // | |||||
| // Licensed under the Apache License, Version 2.0 (the "License"); | |||||
| // you may not use this file except in compliance with the License. | |||||
| // You may obtain a copy of the License at | |||||
| // | |||||
| // http://www.apache.org/licenses/LICENSE-2.0 | |||||
| // | |||||
| // Unless required by applicable law or agreed to in writing, software | |||||
| // distributed under the License is distributed on an "AS IS" BASIS, | |||||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |||||
| // See the License for the specific language governing permissions and | |||||
| // limitations under the License. | |||||
| // | |||||
| #include "draco/mesh/mesh_misc_functions.h" | |||||
| namespace draco { | |||||
| std::unique_ptr<CornerTable> CreateCornerTableFromPositionAttribute( | |||||
| const Mesh *mesh) { | |||||
| typedef CornerTable::FaceType FaceType; | |||||
| const PointAttribute *const att = | |||||
| mesh->GetNamedAttribute(GeometryAttribute::POSITION); | |||||
| if (att == nullptr) | |||||
| return nullptr; | |||||
| IndexTypeVector<FaceIndex, FaceType> faces(mesh->num_faces()); | |||||
| FaceType new_face; | |||||
| for (FaceIndex i(0); i < mesh->num_faces(); ++i) { | |||||
| const Mesh::Face &face = mesh->face(i); | |||||
| for (int j = 0; j < 3; ++j) { | |||||
| // Map general vertex indices to position indices. | |||||
| new_face[j] = att->mapped_index(face[j]).value(); | |||||
| } | |||||
| faces[FaceIndex(i)] = new_face; | |||||
| } | |||||
| // Build the corner table. | |||||
| return CornerTable::Create(faces); | |||||
| } | |||||
| std::unique_ptr<CornerTable> CreateCornerTableFromAllAttributes( | |||||
| const Mesh *mesh) { | |||||
| typedef CornerTable::FaceType FaceType; | |||||
| IndexTypeVector<FaceIndex, FaceType> faces(mesh->num_faces()); | |||||
| FaceType new_face; | |||||
| for (FaceIndex i(0); i < mesh->num_faces(); ++i) { | |||||
| const Mesh::Face &face = mesh->face(i); | |||||
| // Each face is identified by point indices that automatically split the | |||||
| // mesh along attribute seams. | |||||
| for (int j = 0; j < 3; ++j) { | |||||
| new_face[j] = face[j].value(); | |||||
| } | |||||
| faces[i] = new_face; | |||||
| } | |||||
| // Build the corner table. | |||||
| return CornerTable::Create(faces); | |||||
| } | |||||
| } // namespace draco | |||||