text: // Copyright 2013 Google Inc. All Rights Reserved.
  //
  // 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.
  //
  
  // Author: ericv@google.com (Eric Veach)
  
  #ifndef S2_S2SHAPEUTIL_SHAPE_EDGE_H_
  #define S2_S2SHAPEUTIL_SHAPE_EDGE_H_
  
  #include "s2/s2point.h"
  #include "s2/s2shape.h"
  #include "s2/s2shapeutil_shape_edge_id.h"
  
  namespace s2shapeutil {
  
  // A class representing a ShapeEdgeId together with the two endpoints of that
  // edge.  It should be passed by reference.
  struct ShapeEdge {
   public:
    ShapeEdge() {}
    ShapeEdge(const S2Shape& shape, int32 edge_id);
    ShapeEdge(int32 shape_id, int32 edge_id, const S2Shape::Edge& edge);
    ShapeEdgeId id() const { return id_; }
    const S2Point& v0() const { return edge_.v0; }
    const S2Point& v1() const { return edge_.v1; }
  
   private:
    ShapeEdgeId id_;
    S2Shape::Edge edge_;
  };
  
  
  //////////////////   Implementation details follow   ////////////////////
  
  
  inline ShapeEdge::ShapeEdge(const S2Shape& shape, int32 edge_id)
      : ShapeEdge(shape.id(), edge_id, shape.edge(edge_id)) {
  }
  
  inline ShapeEdge::ShapeEdge(int32 shape_id, int32 edge_id,
                              const S2Shape::Edge& edge)
      : id_(shape_id, edge_id), edge_(edge) {
  }
  
  }  // namespace s2shapeutil
  
  #endif  // S2_S2SHAPEUTIL_SHAPE_EDGE_H_
  