REveGeoShape.hxx

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// @(#)root/eve7:$Id$
// Author: Matevz Tadel 2007, 1018
 
/*************************************************************************
 * Copyright (C) 1995-2019, 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 ROOT7_REveGeoShape
#define ROOT7_REveGeoShape
 
#include <ROOT/REveShape.hxx>
 
class TGeoManager;
class TGeoShape;
class TGeoHMatrix;
class TGeoCompositeShape;
class TBuffer3D;
 
namespace ROOT {
namespace Experimental {
 
class REveGeoShapeExtract;
 
// ==========================================================================================
// REveGeoShape
// Wrapper for TGeoShape with absolute positioning and color attributes allowing display of extracted
// TGeoShape's (without an active TGeoManager) and simplified geometries (needed for NLT projections).
// ==========================================================================================
 
class REveGeoShape : public REveShape,
                     public REveProjectable
{
private:
   REveGeoShape(const REveGeoShape &) = delete;
   REveGeoShape &operator=(const REveGeoShape &) = delete;
 
protected:
   Int_t fNSegments{0};
   TGeoShape *fShape{nullptr};
   TGeoCompositeShape *fCompositeShape{nullptr}; //! Temporary holder (if passed shape is composite shape).
 
   static TGeoManager *fgGeoManager;
 
   static REveGeoShape *SubImportShapeExtract(REveGeoShapeExtract *gse, REveElement *parent);
   REveGeoShapeExtract *DumpShapeTree(REveGeoShape *geon, REveGeoShapeExtract *parent = nullptr);
 
   TGeoShape *MakePolyShape();
 
public:
   REveGeoShape(const std::string &name = "REveGeoShape", const std::string &title = "");
   ~REveGeoShape() override;
 
   Int_t WriteCoreJson(nlohmann::json &j, Int_t rnr_offset) override;
   void BuildRenderData() override;
 
   Int_t GetNSegments() const { return fNSegments; }
   TGeoShape *GetShape() const { return fShape; }
   void SetNSegments(Int_t s);
   void SetShape(TGeoShape *s);
 
   void ComputeBBox() override;
 
   void SaveExtract(const char *file, const char *name);
   void WriteExtract(const char *name);
 
   static REveGeoShape *ImportShapeExtract(REveGeoShapeExtract *gse, REveElement *parent = nullptr);
 
   // GeoProjectable
   virtual std::unique_ptr<TBuffer3D> MakeBuffer3D();
   TClass *ProjectedClass(const REveProjection *p) const override;
 
   static TGeoManager *GetGeoManager();
   static TGeoHMatrix *GetGeoHMatrixIdentity();
};
 
//------------------------------------------------------------------------------
 
// ==========================================================================================
// REveGeoShapeProjected
// ==========================================================================================
 
class REveGeoShapeProjected : public REveShape, public REveProjected {
private:
   REveGeoShapeProjected(const REveGeoShapeProjected &) = delete;
   REveGeoShapeProjected &operator=(const REveGeoShapeProjected &) = delete;
 
protected:
   std::unique_ptr<TBuffer3D> fBuff;    //! 3d buffer
 
   void SetDepthLocal(Float_t d) override;
 
public:
   REveGeoShapeProjected();
   ~REveGeoShapeProjected() override;
 
   void SetProjection(REveProjectionManager *proj, REveProjectable *model) override;
   void UpdateProjection() override;
   REveElement *GetProjectedAsElement() override { return this; }
 
   void ComputeBBox() override;
};
 
} // namespace Experimental
} // namespace ROOT
 
#endif