class TGLRotateManip: public TGLManip


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.

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:

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

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.
 Find mouse position in viewport coords

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 20882 2007-11-19 11:31:26Z rdm $
Last generated: 2008-06-25 08:41
Copyright (C) 1995-2005, Rene Brun and Fons Rademakers. *

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