root/ROOT/REveGeoPolyShape.hxx

0001 // @(#)root/eve7:$Id$
0002 // Author: Matevz Tadel 2007, 2018
0003
0004 /*************************************************************************
0005  * Copyright (C) 1995-2019, Rene Brun and Fons Rademakers.               *
0006  * All rights reserved.                                                  *
0007  *                                                                       *
0008  * For the licensing terms see $ROOTSYS/LICENSE.                         *
0009  * For the list of contributors see $ROOTSYS/README/CREDITS.             *
0010  *************************************************************************/
0011
0012 #ifndef ROOT7_REveGeoPolyShape
0013 #define ROOT7_REveGeoPolyShape
0014
0015 #include "TGeoBBox.h"
0016
0017 #include <vector>
0018
0019 class TBuffer3D;
0020 class TGeoCompositeShape;
0021 class TGeoShape;
0022
0023 namespace ROOT {
0024 namespace Experimental {
0025
0026 class REveRenderData;
0027
0028 class REveGeoPolyShape : public TGeoBBox
0029 {
0030 private:
0031    REveGeoPolyShape(const REveGeoPolyShape&) = delete;
0032    REveGeoPolyShape& operator=(const REveGeoPolyShape&) = delete;
0033
0034 protected:
0035    std::vector<Double_t> fVertices;
0036    std::vector<Double_t> fNormals;
0037    std::vector<UInt_t>   fPolyDesc;
0038    Int_t                 fNbPols{0};
0039
0040    void FillBuffer3D(TBuffer3D &buffer, Int_t reqSections, Bool_t localFrame) const override;
0041
0042    void SetFromBuff3D(const TBuffer3D &buffer);
0043
0044    Int_t CheckPoints(const UInt_t *source, UInt_t *dest) const;
0045
0046    static Bool_t Eq(const Double_t *p1, const Double_t *p2);
0047
0048    struct Edge_t
0049    {
0050       Int_t fI, fJ;
0051       Edge_t(Int_t i, Int_t j)
0052       {
0053          if (i <= j) { fI = i; fJ = j; }
0054          else        { fI = j; fJ = i; }
0055       }
0056
0057       bool operator<(const Edge_t& e) const
0058       {
0059          if (fI == e.fI) return fJ < e.fJ;
0060          else            return fI < e.fI;
0061       }
0062    };
0063
0064    static Bool_t         fgAutoEnforceTriangles;
0065    static Bool_t         fgAutoCalculateNormals;
0066
0067 public:
0068    REveGeoPolyShape() = default;
0069
0070    ~REveGeoPolyShape() override = default;
0071
0072    Int_t GetNumFaces() const { return fNbPols; }
0073
0074    void FillRenderData(REveRenderData &rd);
0075
0076    void BuildFromComposite(TGeoCompositeShape *cshp, Int_t n_seg = 60);
0077    void BuildFromShape(TGeoShape *shape, Int_t n_seg = 60);
0078
0079    void EnforceTriangles();
0080    void CalculateNormals();
0081
0082    const TBuffer3D& GetBuffer3D(Int_t reqSections, Bool_t localFrame) const override;
0083    TBuffer3D *MakeBuffer3D() const override;
0084
0085    static void   SetAutoEnforceTriangles(Bool_t f);
0086    static Bool_t GetAutoEnforceTriangles();
0087    static void   SetAutoCalculateNormals(Bool_t f);
0088    static Bool_t GetAutoCalculateNormals();
0089
0090    ClassDefOverride(REveGeoPolyShape, 1); // A shape with arbitrary tesselation for visualization of CSG shapes.
0091 };
0092
0093 }}
0094
0095 #endif