TGLUtil

class TGLUtil

    public:

                      TGLUtil()
                      TGLUtil(const TGLUtil&)
              virtual ~TGLUtil()
          static void CheckError()
       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.                                                            

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

 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

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

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

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

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

Inline Functions

               void ~TGLUtil()
            TClass* Class()
            TClass* IsA() const
               void ShowMembers(TMemberInspector& insp, char* parent)
               void Streamer(TBuffer& b)
               void StreamerNVirtual(TBuffer& b)
            TGLUtil TGLUtil()
            TGLUtil TGLUtil(const TGLUtil&)
           TGLUtil& operator=(const TGLUtil&)