TEveGeoPolyShape.h

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// @(#)root/eve:$Id$
// Author: Matevz Tadel 2007
 
/*************************************************************************
 * Copyright (C) 1995-2007, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
 
#ifndef ROOT_TEveGeoPolyShape
#define ROOT_TEveGeoPolyShape
 
#include "TGeoBBox.h"
 
#include <vector>
 
class TBuffer3D;
class TGLFaceSet;
class TGeoCompositeShape;
 
class TEveGeoPolyShape : public TGeoBBox
{
   friend class TEveGeoPolyShapeGL;
 
private:
   TEveGeoPolyShape(const TEveGeoPolyShape&);            // Not implemented
   TEveGeoPolyShape& operator=(const TEveGeoPolyShape&); // Not implemented
 
protected:
   std::vector<Double_t> fVertices;
   std::vector<Int_t>    fPolyDesc;
   UInt_t                fNbPols;
 
   void FillBuffer3D(TBuffer3D& buffer, Int_t reqSections, Bool_t localFrame) const override;
 
   struct Edge_t
   {
      Int_t fI, fJ;
      Edge_t(Int_t i, Int_t j)
      {
         if (i <= j) { fI = i; fJ = j; }
         else        { fI = j; fJ = i; }
      }
 
      bool operator<(const Edge_t& e) const
      {
         if (fI == e.fI)
            return fJ < e.fJ;
         else
            return fI < e.fI;
      }
   };
 
public:
   TEveGeoPolyShape();
   ~TEveGeoPolyShape() override {}
 
   static TEveGeoPolyShape* Construct(TGeoCompositeShape *cshp, Int_t n_seg);
 
   void SetFromFaceSet(TGLFaceSet* fs);
 
   const TBuffer3D& GetBuffer3D(Int_t reqSections, Bool_t localFrame) const override;
         TBuffer3D* MakeBuffer3D() const override;
 
   ClassDefOverride(TEveGeoPolyShape, 1); // A shape with arbitrary tesselation for visualization of CSG shapes.
};
 
#endif