library: libRGL
#include "TGLUtil.h"

TGLUtil

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

class TGLUtil

Inheritance Chart:

TGLUtil


    public:

                      TGLUtil()
                      TGLUtil(const TGLUtil&)
              virtual ~TGLUtil()
          static void CheckError(const char* loc)
       static TClass* Class()
          static void DrawLine(const TGLLine3& line, TGLUtil::ELineHeadShape head, Double_t size, const Float_t* rgba)
          static void DrawLine(const TGLVertex3& start, const TGLVector3& vector, TGLUtil::ELineHeadShape head, Double_t size, const Float_t* rgba)
          static void DrawRing(const TGLVertex3& center, const TGLVector3& normal, Double_t radius, const Float_t* rgba)
          static void DrawSphere(const TGLVertex3& position, Double_t radius, const Float_t* rgba)
      virtual TClass* IsA() const
             TGLUtil& operator=(const TGLUtil&)
          static void SetDrawColors(const Float_t* rgba)
         virtual void ShowMembers(TMemberInspector& insp, char* parent)
         virtual void Streamer(TBuffer& b)
                 void StreamerNVirtual(TBuffer& b)

Data Members

    private:

      static UInt_t fgDrawQuality  

    public:

      static const TGLUtil::ELineHeadShape kLineHeadNone   
      static const TGLUtil::ELineHeadShape kLineHeadArrow  
      static const TGLUtil::ELineHeadShape kLineHeadBox

Class Description

                                                                      
 TGLVertex3                                                           
                                                                      
 3 component (x/y/z) vertex class                                     
                                                                      
 This is part of collection of simple utility classes for GL only in  
 TGLUtil.h/cxx. These provide const and non-const accessors Arr() &   
 CArr() to a GL compatible internal field - so can be used directly   
 with OpenGL C API calls - which TVector3 etc cannot (easily).        
 They are not intended to be fully featured just provide minimum      
 required.

void CheckError(const char * loc)

 Check current GL error state, outputing details via ROOT
 Error method if one

void SetDrawColors(const Float_t rgba[4])

 Set basic draw colors from 4 component 'rgba'
 Used by other TGLUtil drawing routines

 Sets basic (unlit) color - glColor
 and also GL materials (see OpenGL docs) thus:

 diffuse  : rgba
 ambient  : 0.0 0.0 0.0 1.0
 specular : 0.6 0.6 0.6 1.0
 emission : rgba/4.0
 shininess: 60.0

 emission is set so objects with no lights (but lighting still enabled)
 are partially visible

void DrawSphere(const TGLVertex3 & position, Double_t radius, const Float_t rgba[4])

 Draw sphere, centered on vertex 'position', with radius 'radius',
 color 'rgba'

void DrawLine(const TGLLine3 & line, ELineHeadShape head, Double_t size, const Float_t rgba[4])

 Draw thick line (tube) defined by 'line', with head at end shape
 'head' - box/arrow/none, (head) size 'size', color 'rgba'

void DrawLine(const TGLVertex3 & start, const TGLVector3 & vector, ELineHeadShape head, Double_t size, const Float_t rgba[4])

 Draw thick line (tube) running from 'start', length 'vector',
 with head at end of shape 'head' - box/arrow/none,
 (head) size 'size', color 'rgba'

void DrawRing(const TGLVertex3 & center, const TGLVector3 & normal, Double_t radius, const Float_t rgba[4])

 Draw ring, centered on 'center', lying on plane defined by 'center' & 'normal'
 of outer radius 'radius', color 'rgba'

virtual ~TGLUtil()

Author: Richard Maunder 25/05/2005
Last update: root/gl:$Name: $:$Id: TGLUtil.cxx,v 1.27 2006/06/13 15:43:39 couet Exp $
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *

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