openmesh/src/OpenMesh/Core/Mesh/SmartHandles.hh

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#ifndef OPENMESH_SMARTHANDLES_HH
#define OPENMESH_SMARTHANDLES_HH


//== INCLUDES =================================================================

#include "Handles.hh"


//== NAMESPACES ===============================================================

namespace OpenMesh {

//== FORWARD DECLARATION ======================================================

class PolyConnectivity;
struct SmartVertexHandle;
struct SmartHalfedgeHandle;
struct SmartEdgeHandle;
struct SmartFaceHandle;


//== CLASS DEFINITION =========================================================

class SmartBaseHandle : public BaseHandle
{
public:
  explicit SmartBaseHandle(int _idx=-1, PolyConnectivity* _mesh = nullptr) : BaseHandle(_idx), mesh_(_mesh) {}

  /// Get the underlying mesh of this handle
  PolyConnectivity* mesh() const { return mesh_; }

  // TODO: should operators ==, !=, < look at mesh_?

private:
  PolyConnectivity* mesh_;

};

struct SmartVertexHandle : public SmartBaseHandle, VertexHandle
{
  explicit SmartVertexHandle(int _idx=-1, PolyConnectivity* _mesh = nullptr) : SmartBaseHandle(_idx, _mesh) {}

  SmartHalfedgeHandle out() const;
  SmartHalfedgeHandle halfedge() const; // alias for out
  SmartHalfedgeHandle in() const;
};

struct SmartHalfedgeHandle : public SmartBaseHandle, HalfedgeHandle
{
  explicit SmartHalfedgeHandle(int _idx=-1, PolyConnectivity* _mesh = nullptr) : SmartBaseHandle(_idx, _mesh) {}

  SmartHalfedgeHandle next() const;
  SmartHalfedgeHandle prev() const;
  SmartHalfedgeHandle opp() const;
  SmartVertexHandle   to() const;
  SmartVertexHandle   from() const;
  SmartFaceHandle     face() const;
};

struct SmartEdgeHandle : public SmartBaseHandle, EdgeHandle
{
  explicit SmartEdgeHandle(int _idx=-1, PolyConnectivity* _mesh = nullptr) : SmartBaseHandle(_idx, _mesh) {}

  SmartHalfedgeHandle h(unsigned int _i) const;
  SmartHalfedgeHandle h0() const;
  SmartHalfedgeHandle h1() const;
  SmartVertexHandle   v(unsigned int _i) const;
  SmartVertexHandle   v0() const;
  SmartVertexHandle   v1() const;
};

struct SmartFaceHandle : public SmartBaseHandle, FaceHandle
{
  explicit SmartFaceHandle(int _idx=-1, PolyConnectivity* _mesh = nullptr) : SmartBaseHandle(_idx, _mesh) {}

  SmartHalfedgeHandle halfedge() const;
};


inline SmartVertexHandle   make_smart(VertexHandle _vh,    PolyConnectivity* _mesh) { return SmartVertexHandle  (_vh.idx(), _mesh); }
inline SmartHalfedgeHandle make_smart(HalfedgeHandle _vh,  PolyConnectivity* _mesh) { return SmartHalfedgeHandle(_vh.idx(), _mesh); }
inline SmartEdgeHandle     make_smart(EdgeHandle _vh,      PolyConnectivity* _mesh) { return SmartEdgeHandle    (_vh.idx(), _mesh); }
inline SmartFaceHandle     make_smart(FaceHandle _vh,      PolyConnectivity* _mesh) { return SmartFaceHandle    (_vh.idx(), _mesh); }


//=============================================================================
} // namespace OpenMesh
//=============================================================================


#endif // OPENMESH_SMARTHANDLES_HH
//=============================================================================