StripProcessorT.hh

/*===========================================================================*\
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/*===========================================================================*\
 *                                                                           *             
 *   $Revision: 8628 $                                                         *
 *   $Date: 2010-03-01 18:24:50 +0100 (Mo, 01. Mär 2010) $                   *
 *                                                                           *
\*===========================================================================*/

//=============================================================================
//
//  CLASS StripProcessorT
//
//=============================================================================


#ifndef ACG_STRIP_PROCESSOR_HH
#define ACG_STRIP_PROCESSOR_HH


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

#include <vector>
#include <OpenMesh/Core/Utils/Property.hh>
#include <OpenMesh/Core/IO/MeshIO.hh>

#include "../Config/ACGDefines.hh"

#include <ACG/GL/GLState.hh>

//== FORWARDDECLARATIONS ======================================================


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

namespace ACG {
namespace SceneGraph {


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

class ACGDLLEXPORT Strip {
  
public:
    
  std::vector< unsigned int > indexArray;
  
  std::vector< OpenMesh::FaceHandle > faceMap;
  
  int textureIndex;
  
};

bool ACGDLLEXPORT stripTextureCompare(const Strip& i,const Strip& j);

class ACGDLLEXPORT TextureRenderInfo {
  public:
  TextureRenderInfo(int _textureId,int _faceCount,int _startOffset):
  textureId(_textureId),
  faceCount(_faceCount),
  startOffset(_startOffset)
  {};
  
  int textureId;
  int faceCount;
  int startOffset;
};



template <class Mesh>
class StripProcessorT
{
public:
    
  typedef unsigned int                      Index;
  typedef std::vector<Strip>                Strips;
  typedef typename Strips::const_iterator   StripsIterator;
  typedef typename Mesh::FaceHandle         FaceHandle;

  StripProcessorT(Mesh& _mesh);

  ~StripProcessorT();

  unsigned int stripify();

  void clear() { Strips().swap(strips_); }

  unsigned int nStrips() const { return strips_.size(); }

  StripsIterator begin() const { return strips_.begin(); }
  StripsIterator end()   const { return strips_.end(); }


private:

  

  void convexityTest(FaceHandle _fh);

  OpenMesh::FPropHandleT<bool>::reference  processed(typename Mesh::FaceHandle _fh) {
    return mesh_.property(processed_, _fh);
  }
  OpenMesh::FPropHandleT<bool>::reference  used(typename Mesh::FaceHandle _fh) {
    return mesh_.property(used_, _fh);
  }



private:

  Mesh&                          mesh_;
  Strips                         strips_;
  OpenMesh::FPropHandleT<bool>   processed_, used_;
  
//===========================================================================
//===========================================================================    
public:
  
void invalidateStrips() { stripsValid_ = false; };
  
private:  
  
typedef std::vector<typename Mesh::FaceHandle>  FaceHandles;

bool stripsValid_;  

void buildStrips();

void buildStripsTriMesh();

void buildStripsPolyMesh();


void buildStripTriMesh(typename Mesh::HalfedgeHandle _start_hh,
                        Strip& _strip,
                        FaceHandles& _faces);
                        
void buildStripPolyMesh(typename Mesh::HalfedgeHandle _start_hh,
                        Strip& _strip,
                        FaceHandles& _faces);
                                                 
//===========================================================================
//===========================================================================    
public:  
  ACG::Vec3f * perEdgeVertexBuffer();   

  ACG::Vec4f * perEdgeColorBuffer();   
  
  void invalidatePerEdgeBuffers(){ updatePerEdgeBuffers_ = true; };
  
private:
  void updatePerEdgeBuffers();  
  
  std::vector< ACG::Vec3f >  perEdgeVertexBuffer_;
  
  std::vector< ACG::Vec4f >  perEdgeColorBuffer_;
  
  bool updatePerEdgeBuffers_;

//===========================================================================
//===========================================================================      

public:
  ACG::Vec3f * perFaceVertexBuffer();
  
  ACG::Vec3f * perFaceNormalBuffer();
  
  ACG::Vec4f * perFaceColorBuffer();  
  
  unsigned int perFaceVertexBufferSize(){ return perFaceVertexBuffer_.size(); };

  void invalidatePerFaceBuffers(){ updatePerFaceBuffers_ = true; };
  
private:
  void updatePerFaceBuffers();
  
  std::vector< ACG::Vec3f >  perFaceVertexBuffer_;
  std::vector< ACG::Vec4f >  perFaceColorBuffer_;
  std::vector< ACG::Vec3f >  perFaceNormalBuffer_;

  bool updatePerFaceBuffers_;
  
//===========================================================================
//===========================================================================    
  
public:
  
  void updatePickingVertices(ACG::GLState& _state , uint _offset = 0);    
  
  ACG::Vec4uc * pickVertexColorBuffer(){ return &(pickVertexColorBuf_)[0]; };
  
private:  
  
  std::vector< ACG::Vec4uc > pickVertexColorBuf_;
  

//===========================================================================
//===========================================================================    

  public:
    
    void updatePickingEdges(ACG::GLState& _state , uint _offset = 0 );    
    
    ACG::Vec4uc * pickEdgeColorBuffer(){ return &(pickEdgeColorBuf_)[0]; };
    
 
    
  private:  
    
    std::vector< ACG::Vec4uc > pickEdgeColorBuf_;
    
    
//===========================================================================
//===========================================================================    

public:
  
  void updatePickingFaces(ACG::GLState& _state );    
  
  ACG::Vec4uc * pickFaceColorBuffer(){ return &(pickFaceColorBuf_)[0]; };
  

  
private:  
  
  void updatePickingFacesTrimesh(ACG::GLState& _state );
  
  void updatePickingFacesPolymesh(ACG::GLState& _state );
  
  std::vector< ACG::Vec4uc > pickFaceColorBuf_;
  
  //===========================================================================
  //===========================================================================    
  
public:
  
  void updatePickingAny(ACG::GLState& _state );    
  
  ACG::Vec4uc * pickAnyColorBuffer(){ return &(pickAnyColorBuf_)[0]; };
  
private:  
  
  std::vector< ACG::Vec4uc > pickAnyColorBuf_;
  
//===========================================================================
//===========================================================================    

public:
  void setIndexPropertyName( std::string _indexPropertyName );
  
  void setPerFaceTextureCoordinatePropertyName( std::string _perFaceTextureCoordinatePropertyName );
  
  bool perFaceTextureCoordinateAvailable()  {
    return ( perFaceTextureCoordinateProperty_.is_valid() );
  }  
  
  bool perFaceTextureIndexAvailable() {
    return ( textureIndexProperty_.is_valid() );
  }
  
  ACG::Vec2f * perFacePerVertexTextureCoordBuffer(){ return &(perFaceTextureCoordArray_)[0]; };
  
  std::vector< TextureRenderInfo >* textureRenderData(){ return &textureRenderData_; };

private:
  
  OpenMesh::FPropHandleT< int > textureIndexProperty_;

  OpenMesh::HPropHandleT< typename Mesh::TexCoord2D > perFaceTextureCoordinateProperty_;
  
  std::vector< ACG::Vec2f >  perFaceTextureCoordArray_;
  
  std::vector< TextureRenderInfo > textureRenderData_;

};


//=============================================================================
} // namespace SceneGraph
} // namespace ACG
//=============================================================================
#if defined(INCLUDE_TEMPLATES) && !defined(ACG_STRIP_PROCESSOR_C)
#define ACG_STRIP_PROCESSOR_TEMPLATES
#include "StripProcessorT.cc"
#endif
//=============================================================================
#endif // ACG_STRIP_PROCESSOR_HH defined
//=============================================================================