library: libRGL
#include "TGLRotateManip.h"

TGLRotateManip

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

class TGLRotateManip : public TGLManip

Inheritance Chart:

TVirtualGLManip

TGLManip

TGLRotateManip

    private:

      Double_t CalculateAngleDelta(const TPoint& mouse, const TGLCamera& camera)
      TGLLine3 CalculateRingLine(const TPoint& mouse, const TGLCamera& camera) const
          void DrawAxisRing(const TGLVertex3& origin, const TGLVector3& axis, Double_t radius, Float_t* rgba) const

    public:

                      TGLRotateManip()
                      TGLRotateManip(TGLPhysicalShape* shape)
                      TGLRotateManip(const TGLRotateManip&)
              virtual ~TGLRotateManip()
       static TClass* Class()
         virtual void Draw(const TGLCamera& camera) const
       virtual Bool_t HandleButton(const Event_t& event, const TGLCamera& camera)
       virtual Bool_t HandleMotion(const Event_t& event, const TGLCamera& camera, const TGLBoundingBox& sceneBox)
      virtual TClass* IsA() const
         virtual void ShowMembers(TMemberInspector& insp, char* parent)
         virtual void Streamer(TBuffer& b)
                 void StreamerNVirtual(TBuffer& b)

Data Members

    private:

          Bool_t fShallowRing       ! does active ring form shallow angle to eye?
          Bool_t fShallowFront      ! front or back of the active shallow ring?
        TGLPlane fActiveRingPlane   ! plane of the active ring (widget)
      TGLVertex3 fActiveRingCenter  ! center of active ring
        TGLLine3 fRingLine          
        TGLLine3 fRingLineOld

Class Description

                                                                      
 TGLRotateManip                                                       
                                                                      
 Rotate manipulator - attaches to physical shape and draws local axes 
 widgets - rings drawn from attached physical center, in plane defined
 by axis. User can mouse over (turns yellow) and L click/drag to      
 rotate attached physical round the ring center.                      
 Widgets use standard 3D package axes colours: X red, Y green, Z blue.

TGLRotateManip()

 Construct rotation manipulator not bound to any physical shape.

TGLRotateManip(TGLPhysicalShape * shape)

 Construct rotation manipulator bound to TGLPhysicalShape 'shape'.

~TGLRotateManip()

 Destory the rotation manipulator

void Draw(const TGLCamera & camera)

 Draw rotate manipulator - axis rings drawn from attached physical center,
 in plane defined by axis as normal, in red(X), green(Y) and blue(Z), with
 white center sphere. If selected widget (mouse over) this is drawn in active
 colour (yellow).

Bool_t HandleButton(const Event_t & event, const TGLCamera & camera)

 Handle mouse button event over manipulator - returns kTRUE if redraw required
 kFALSE otherwise.

Bool_t HandleMotion(const Event_t & event, const TGLCamera & camera, const TGLBoundingBox & sceneBox)

 Handle mouse motion over manipulator - if active (selected widget) rotate
 physical around selected ring widget plane normal. Returns kTRUE if redraw
 required kFALSE otherwise.

Double_t CalculateAngleDelta(const TPoint & mouse, const TGLCamera & camera)

 Calculate angle delta for rotation based on new mouse position

TGLLine3 CalculateRingLine(const TPoint & mouse, const TGLCamera & camera)

 Calculated interaction line between 'mouse' viewport point, and current selected
 widget (ring), under supplied 'camera' projection.
 Find mouse position in viewport coords

void DrawAxisRing(const TGLVertex3 & origin, const TGLVector3 & axis, Double_t radius, Float_t rgba[4])

TGLRotateManip()

Author: Richard Maunder 04/10/2005
Last update: root/gl:$Name: $:$Id: TGLRotateManip.cxx,v 1.7 2006/02/23 16:44:52 brun Exp $
Copyright (C) 1995-2005, Rene Brun and Fons Rademakers. *

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