class TGLRotateManip: public TGLManip


 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.

Function Members (Methods)

public:

	TGLRotateManip()
	TGLRotateManip(TGLPhysicalShape* shape)
	TGLRotateManip(const TGLRotateManip&)
virtual	~TGLRotateManip()
void	TGLManip::Attach(TGLPhysicalShape* shape)
static TClass*	Class()
virtual void	Draw(const TGLCamera& camera) const
Bool_t	TGLManip::GetActive() const
TGLPhysicalShape*	TGLManip::GetAttached() const
UInt_t	TGLManip::GetSelectedWidget() const
virtual Bool_t	HandleButton(const Event_t& event, const TGLCamera& camera)
virtual Bool_t	HandleMotion(const Event_t& event, const TGLCamera& camera)
virtual TClass*	IsA() const
virtual Bool_t	TGLManip::Select(const TGLCamera&, const TGLRect&, const TGLBoundingBox&)
void	TGLManip::SetActive(Bool_t a)
void	TGLManip::SetSelectedWidget(UInt_t s)
virtual void	ShowMembers(TMemberInspector& insp, char* parent)
virtual void	Streamer(TBuffer& b)
void	StreamerNVirtual(TBuffer& b)

protected:

static Double_t	Angle(const TGLVector3& v1, const TGLVector3& v2)
static Double_t	Angle(const TGLVector3& v1, const TGLVector3& v2, const TGLVector3& ref)
void	TGLManip::CalcDrawScale(const TGLBoundingBox& box, const TGLCamera& camera, Double_t& base, TGLVector3* axis) const
TGLManip&	TGLManip::operator=(const TGLManip&)

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

Data Members

protected:

Bool_t	TGLManip::fActive	! manipulator is active?
TPoint	TGLManip::fFirstMouse	! first (start) mouse position (in WINDOW coords)
TPoint	TGLManip::fLastMouse	! last (latest) mouse position (in WINDOW coords)
UInt_t	TGLManip::fSelectedWidget	! active width (axis) component
TGLPhysicalShape*	TGLManip::fShape	! manipulated shape
static Float_t	TGLManip::fgBlue[4]
static Float_t	TGLManip::fgGreen[4]
static Float_t	TGLManip::fgGrey[4]
static Float_t	TGLManip::fgRed[4]
static Float_t	TGLManip::fgWhite[4]
static Float_t	TGLManip::fgYellow[4]

private:

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

Class Charts

Inheritance Inherited Members Includes Libraries

Function documentation

Double_t Angle(const TGLVector3& v1, const TGLVector3& v2)

 Calculate unsigned angle between vectors v1 and v2

Double_t Angle(const TGLVector3& v1, const TGLVector3& v2, const TGLVector3& ref)

 Calculate signed angle between vectors v1 and v2, using ref to define right handed coord system
 If v1.v2 parallel to ref vector: +ive for clockwise, -ive for anticlockwise
 If v1.v2 antiparallel to ref vector: -ive for clockwise, +ive for anticlockwise

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) const

 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)

 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) const

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

void DrawAxisRing(const TGLVertex3& origin, const TGLVector3& axis, Double_t radius, Float_t* rgba) const

TGLRotateManip()

Author: Richard Maunder 04/10/2005
Last change: root/gl:$Id: TGLRotateManip.h 26394 2008-11-23 14:35:25Z matevz $
Last generated: 2008-11-24 08:19
Copyright (C) 1995-2005, Rene Brun and Fons Rademakers. *

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