Differential D4501 Diff 14126 extern/gltf-draco/draco/src/draco/compression/mesh/traverser/mesh_attribute_indices_encoding_observer.h
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extern/gltf-draco/draco/src/draco/compression/mesh/traverser/mesh_attribute_indices_encoding_observer.h
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| // 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. | |||||
| // | |||||
| #ifndef DRACO_COMPRESSION_MESH_TRAVERSER_MESH_ATTRIBUTE_INDICES_ENCODING_OBSERVER_H_ | |||||
| #define DRACO_COMPRESSION_MESH_TRAVERSER_MESH_ATTRIBUTE_INDICES_ENCODING_OBSERVER_H_ | |||||
| #include "draco/compression/attributes/mesh_attribute_indices_encoding_data.h" | |||||
| #include "draco/compression/attributes/points_sequencer.h" | |||||
| #include "draco/mesh/mesh.h" | |||||
| namespace draco { | |||||
| // Class that can be used to generate encoding (and decoding) order of attribute | |||||
| // values based on the traversal of the encoded mesh. The class should be used | |||||
| // as the TraversalObserverT member of a Traverser class such as the | |||||
| // DepthFirstTraverser (depth_first_traverser.h). | |||||
| // TODO(hemmer): rename to AttributeIndicesCodingTraverserObserver | |||||
| template <class CornerTableT> | |||||
| class MeshAttributeIndicesEncodingObserver { | |||||
| public: | |||||
| MeshAttributeIndicesEncodingObserver() | |||||
| : att_connectivity_(nullptr), | |||||
| encoding_data_(nullptr), | |||||
| mesh_(nullptr), | |||||
| sequencer_(nullptr) {} | |||||
| MeshAttributeIndicesEncodingObserver( | |||||
| const CornerTableT *connectivity, const Mesh *mesh, | |||||
| PointsSequencer *sequencer, | |||||
| MeshAttributeIndicesEncodingData *encoding_data) | |||||
| : att_connectivity_(connectivity), | |||||
| encoding_data_(encoding_data), | |||||
| mesh_(mesh), | |||||
| sequencer_(sequencer) {} | |||||
| // Interface for TraversalObserverT | |||||
| void OnNewFaceVisited(FaceIndex /* face */) {} | |||||
| inline void OnNewVertexVisited(VertexIndex vertex, CornerIndex corner) { | |||||
| const PointIndex point_id = | |||||
| mesh_->face(FaceIndex(corner.value() / 3))[corner.value() % 3]; | |||||
| // Append the visited attribute to the encoding order. | |||||
| sequencer_->AddPointId(point_id); | |||||
| // Keep track of visited corners. | |||||
| encoding_data_->encoded_attribute_value_index_to_corner_map.push_back( | |||||
| corner); | |||||
| encoding_data_ | |||||
| ->vertex_to_encoded_attribute_value_index_map[vertex.value()] = | |||||
| encoding_data_->num_values; | |||||
| encoding_data_->num_values++; | |||||
| } | |||||
| private: | |||||
| const CornerTableT *att_connectivity_; | |||||
| MeshAttributeIndicesEncodingData *encoding_data_; | |||||
| const Mesh *mesh_; | |||||
| PointsSequencer *sequencer_; | |||||
| }; | |||||
| } // namespace draco | |||||
| #endif // DRACO_COMPRESSION_MESH_TRAVERSER_MESH_ATTRIBUTE_INDICES_ENCODING_OBSERVER_H_ | |||||