include/root/TAttBBox.h

0001 // @(#)root/base:$Id$
0002 // Author: Matevz Tadel  7/4/2006
0003
0004 /*************************************************************************
0005  * Copyright (C) 1995-2006, 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 ROOT_TAttBBox
0013 #define ROOT_TAttBBox
0014
0015 #include "Rtypes.h"
0016
0017 class TAttBBox
0018 {
0019 protected:
0020    Float_t*  fBBox;   //! Dynamic Float_t[6] X(min,max), Y(min,max), Z(min,max)
0021
0022    void BBoxInit(Float_t infinity=1e6);
0023    void BBoxZero(Float_t epsilon=0, Float_t x=0, Float_t y=0, Float_t z=0);
0024    void BBoxClear();
0025
0026    void BBoxCheckPoint(Float_t x, Float_t y, Float_t z);
0027    void BBoxCheckPoint(const Float_t* p);
0028
0029    void AssertBBoxExtents(Float_t epsilon=0.005);
0030
0031    TAttBBox(const TAttBBox &tab) : fBBox(nullptr)
0032    {
0033       BBoxInit();
0034       if (tab.fBBox)
0035          for (Int_t i = 0; i < 6; i++)
0036             fBBox[i] = tab.fBBox[i];
0037    }
0038
0039 public:
0040    TAttBBox(): fBBox(nullptr) { }
0041    virtual ~TAttBBox() { BBoxClear(); }
0042
0043    TAttBBox &operator=(const TAttBBox &tab)
0044    {
0045       if (this != &tab) {
0046          BBoxInit();
0047          if (tab.fBBox)
0048             for (Int_t i = 0; i < 6; i++)
0049                fBBox[i] = tab.fBBox[i];
0050       }
0051       return *this;
0052    }
0053
0054    Bool_t   GetBBoxOK() const { return fBBox != nullptr; }
0055    Float_t* GetBBox()         { return fBBox; }
0056    Float_t* AssertBBox()      { if(!fBBox) ComputeBBox(); return fBBox; }
0057    void     ResetBBox()       { if(fBBox) BBoxClear(); }
0058
0059    void     SetupBBoxCube(Float_t extent, Float_t x, Float_t y, Float_t z);
0060
0061    virtual void ComputeBBox() = 0;
0062
0063    ClassDef(TAttBBox,1); // Helper for management of bounding-box information
0064 };
0065
0066
0067 // Inline methods:
0068
0069 inline void TAttBBox::BBoxCheckPoint(Float_t x, Float_t y, Float_t z)
0070 {
0071    if(x < fBBox[0]) fBBox[0] = x;
0072    if(x > fBBox[1]) fBBox[1] = x;
0073    if(y < fBBox[2]) fBBox[2] = y;
0074    if(y > fBBox[3]) fBBox[3] = y;
0075    if(z < fBBox[4]) fBBox[4] = z;
0076    if(z > fBBox[5]) fBBox[5] = z;
0077 }
0078
0079 inline void TAttBBox::BBoxCheckPoint(const Float_t* p)
0080 {
0081    BBoxCheckPoint(p[0], p[1], p[2]);
0082 }
0083
0084 #endif