cpe::trackball Class Reference

A container class to deal with a trackball, use ArcBall paradigm. More...

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List of all members.

Public Member Functions
	trackball ()
const quaternion &	quat () const
	get the current quaternion
quaternion &	quat ()
	get the current quaternion
const quaternion &	d_quat () const
	get the quaternion to apply
quaternion &	d_quat ()
	get the quaternion to apply
double &	radius ()
	get the disc radius
const double &	radius () const
	get the disc radius
double	project_to_disc (const double &x, const double &y) const
	return the distance to disc for the 3D coordinate
void	set_2d_coords (const double &x0, const double &y0, const double &x1, const double &y1)
	given a set of 2d coords difference, return the corresponding quaternion
void	apply_rotation ()
	multiply d_q to current_q
void	no_motion ()
	Set d_q to 0.
Private Attributes
quaternion	current_q
	the current quaternion
quaternion	d_q
	the quaternion to apply
double	disc_radius
	internal parameter of the disc radius

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Detailed Description

A container class to deal with a trackball, use ArcBall paradigm.

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Constructor & Destructor Documentation

cpe::trackball::trackball

(

)

initial constructor

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Member Function Documentation

void cpe::trackball::apply_rotation

(

)

multiply d_q to current_q

References cpe::quaternion::conjugated(), current_q, and d_q.

Referenced by cpe::navigator_tool::trackball_rotate().

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quaternion & cpe::trackball::d_quat

(

)

get the quaternion to apply

References d_q.

const quaternion & cpe::trackball::d_quat

(

)

const

get the quaternion to apply

References d_q.

void cpe::trackball::no_motion

(

)

Set d_q to 0.

References d_q.

double cpe::trackball::project_to_disc	(	const double &	x,
		const double &	y
	)			const

return the distance to disc for the 3D coordinate

References disc_radius.

Referenced by set_2d_coords().

quaternion & cpe::trackball::quat

(

)

get the current quaternion

References current_q.

const quaternion & cpe::trackball::quat

(

)

const

get the current quaternion

References current_q.

Referenced by cpe::navigator_tool::camera_orientation(), cpe::navigator_tool::go_forward(), cpe::navigator_tool::go_right(), and cpe::navigator_tool::go_up().

const double & cpe::trackball::radius

(

)

const

get the disc radius

References disc_radius.

double & cpe::trackball::radius

(

)

get the disc radius

References disc_radius.

void cpe::trackball::set_2d_coords	(	const double &	x0,
		const double &	y0,
		const double &	x1,
		const double &	y1
	)

given a set of 2d coords difference, return the corresponding quaternion

References cpe::v3::cross(), d_q, disc_radius, cpe::v3::norm(), and project_to_disc().

Referenced by cpe::navigator_tool::trackball_rotate().

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Member Data Documentation

quaternion cpe::trackball::current_q [private]

the current quaternion

Referenced by apply_rotation(), and quat().

quaternion cpe::trackball::d_q [private]

the quaternion to apply

Referenced by apply_rotation(), d_quat(), no_motion(), and set_2d_coords().

double cpe::trackball::disc_radius [private]

internal parameter of the disc radius

Referenced by project_to_disc(), radius(), and set_2d_coords().

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The documentation for this class was generated from the following files:

• /home/damien.rohmer/work/2011_teaching/2011_3eti_info_projet/visualiseur/pgm_etudiant/external/include/trackball.hpp
• /home/damien.rohmer/work/2011_teaching/2011_3eti_info_projet/visualiseur/pgm_etudiant/external/src/trackball.cpp