library: libRGL
#include "TGLBoundingBox.h"

TGLBoundingBox

class description - source file - inheritance tree (.pdf)

class TGLBoundingBox

Inheritance Chart:

TGLBoundingBox

    private:

      Double_t Max(UInt_t index) const
      Double_t Min(UInt_t index) const
          void UpdateVolume()
        Bool_t ValidIndex(UInt_t index) const

    public:

                        TGLBoundingBox()
                        TGLBoundingBox(const TGLVertex3* vertex)
                        TGLBoundingBox(const Double_t** vertex)
                        TGLBoundingBox(const TGLVertex3& lowVertex, const TGLVertex3& highVertex)
                        TGLBoundingBox(const TGLBoundingBox& other)
                virtual ~TGLBoundingBox()
                 Bool_t AlignedContains(const TGLBoundingBox& other) const
             TGLVector3 Axis(UInt_t i, Bool_t normalised = true) const
             TGLVertex3 Center() const
         static TClass* Class()
                   void Draw() const
                   void Dump() const
             TGLVector3 Extents() const
          static Bool_t Intersect(const TGLBoundingBox& a, const TGLBoundingBox& b)
        virtual TClass* IsA() const
                 Bool_t IsEmpty() const
        TGLBoundingBox& operator=(const TGLBoundingBox& other)
      const TGLVertex3& operator[](UInt_t index) const
               EOverlap Overlap(const TGLPlane& plane) const
                   void Scale(Double_t val)
                   void Set(const TGLVertex3* vertex)
                   void Set(const Double_t** vertex)
                   void Set(const TGLBoundingBox& other)
                   void SetAligned(const TGLVertex3& lowVertex, const TGLVertex3& highVertex)
                   void SetAligned(UInt_t nbPnts, const Double_t* pnts)
                   void SetEmpty()
           virtual void ShowMembers(TMemberInspector& insp, char* parent)
           virtual void Streamer(TBuffer& b)
                   void StreamerNVirtual(TBuffer& b)
                   void Transform(const TGLMatrix& matrix)
                   void Translate(const TGLVector3& offset)
               Double_t Volume() const
               Double_t XMax() const
               Double_t XMin() const
               Double_t YMax() const
               Double_t YMin() const
               Double_t ZMax() const
               Double_t ZMin() const

Data Members

    private:

      TGLVertex3 fVertex[8]  ! the 8 bounding box vertices
        Double_t fVolume     ! box volume - cached for speed

Class Description

TGLBoundingBox()

TGLBoundingBox(const TGLVertex3 vertex[8])

TGLBoundingBox(const Double_t vertex[8][3])

TGLBoundingBox(const TGLVertex3 & lowVertex, const TGLVertex3 & highVertex)

TGLBoundingBox(const TGLBoundingBox & other)

~TGLBoundingBox()

void Set(const TGLVertex3 vertex[8])

void Set(const Double_t vertex[8][3])

void Set(const TGLBoundingBox & other)

void SetEmpty()

void SetAligned(const TGLVertex3 & lowVertex, const TGLVertex3 & highVertex)

 Set aligned box from two axis aligned low/high vertices
   7-------6
  /|      /|
 3-------2 |
 | 4-----|-5
 |/      |
 0-------1

void SetAligned(UInt_t nbPnts, const Double_t * pnts)

 Set aligned box using one or more points

void Scale(Double_t scale)

void Translate(const TGLVector3 & offset)

void Transform(const TGLMatrix & matrix)

EOverlap Overlap(const TGLPlane & plane) const

 TODO: Cheaper sphere test
 Test all 8 box vertices against plane

Bool_t AlignedContains(const TGLBoundingBox & other) const

 Test is passed box is contained by us. This will ONLY work if we are axis aligned

Bool_t Intersect(const TGLBoundingBox & a, const TGLBoundingBox & b)

 TODO: For some reason this intersection test gives incorrect result if first
 BB is smaller than other - no idea why as should be symetric - need to investigate.
assert(Volume() > other.Volume());

void Draw() const

Double_t Min(UInt_t index) const

Double_t Max(UInt_t index) const

void Dump() const

Inline Functions

                     void UpdateVolume()
                   Bool_t ValidIndex(UInt_t index) const
          TGLBoundingBox& operator=(const TGLBoundingBox& other)
        const TGLVertex3& operator[](UInt_t index) const
                 Double_t XMin() const
                 Double_t XMax() const
                 Double_t YMin() const
                 Double_t YMax() const
                 Double_t ZMin() const
                 Double_t ZMax() const
               TGLVertex3 Center() const
               TGLVector3 Extents() const
               TGLVector3 Axis(UInt_t i, Bool_t normalised = true) const
                 Double_t Volume() const
                   Bool_t IsEmpty() const
                  TClass* Class()
                  TClass* IsA() const
                     void ShowMembers(TMemberInspector& insp, char* parent)
                     void Streamer(TBuffer& b)
                     void StreamerNVirtual(TBuffer& b)

Author: Richard Maunder 25/05/2005
Last update: root/gl:$Name: $:$Id: TGLBoundingBox.cxx,v 1.8 2005/06/24 14:53:02 brun Exp $
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *

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