Differential D4501 Diff 14697 extern/draco/dracoenc/src/draco/mesh/triangle_soup_mesh_builder.h

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extern/draco/dracoenc/src/draco/mesh/triangle_soup_mesh_builder.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_MESH_TRIANGLE_SOUP_MESH_BUILDER_H_
				#define DRACO_MESH_TRIANGLE_SOUP_MESH_BUILDER_H_

				#include "draco/draco_features.h"

				#include "draco/mesh/mesh.h"

				namespace draco {

				// Class for building meshes directly from attribute values that can be
				// specified for each face corner. All attributes are automatically
				// deduplicated.
				class TriangleSoupMeshBuilder {
				public:
				// Starts mesh building for a given number of faces.
				// TODO(ostava): Currently it's necessary to select the correct number of
				// faces upfront. This should be generalized, but it will require us to
				// rewrite our attribute resizing functions.
				void Start(int num_faces);

				// Adds an empty attribute to the mesh. Returns the new attribute's id.
				int AddAttribute(GeometryAttribute::Type attribute_type,
				int8_t num_components, DataType data_type);

				// Sets values for a given attribute on all corners of a given face.
				void SetAttributeValuesForFace(int att_id, FaceIndex face_id,
				const void *corner_value_0,
				const void *corner_value_1,
				const void *corner_value_2);

				// Sets value for a per-face attribute. If all faces of a given attribute are
				// set with this method, the attribute will be marked as per-face, otherwise
				// it will be marked as per-corner attribute.
				void SetPerFaceAttributeValueForFace(int att_id, FaceIndex face_id,
				const void *value);

				// Finalizes the mesh or returns nullptr on error.
				// Once this function is called, the builder becomes invalid and cannot be
				// used until the method Start() is called again.
				std::unique_ptr<Mesh> Finalize();

				private:
				std::vector<int8_t> attribute_element_types_;

				std::unique_ptr<Mesh> mesh_;
				};

				} // namespace draco

				#endif // DRACO_MESH_TRIANGLE_SOUP_MESH_BUILDER_H_