trackball.c File Reference

#include <math.h>
#include "trackball.h"

Go to the source code of this file.

Macros
#define	TRACKBALLSIZE   (0.8)
#define	RENORMCOUNT   97

Functions
static float	tb_project_to_sphere (float, float, float)
static void	normalize_quat (float [4])
void	vzero (float *v)
void	vset (float *v, float x, float y, float z)
void	vsub (const float *src1, const float *src2, float *dst)
void	vcopy (const float *v1, float *v2)
void	vcross (const float *v1, const float *v2, float *cross)
float	vlength (const float *v)
void	vscale (float *v, float div)
void	vnormal (float *v)
float	vdot (const float *v1, const float *v2)
void	vadd (const float *src1, const float *src2, float *dst)
void	trackball (float q[4], float p1x, float p1y, float p2x, float p2y)
void	axis_to_quat (float a[3], float phi, float q[4])
void	add_quats (float q1[4], float q2[4], float dest[4])
void	build_rotmatrix (float m[4][4], float q[4])

Macro Definition Documentation

RENORMCOUNT

#define RENORMCOUNT   97

Definition at line 244 of file trackball.c.

Referenced by add_quats().

TRACKBALLSIZE

#define TRACKBALLSIZE   (0.8)

Definition at line 62 of file trackball.c.

Referenced by trackball().

Function Documentation

add_quats()

void add_quats	(	float	q1[4],
		float	q2[4],
		float	dest[4]
	)

Definition at line 247 of file trackball.c.

References normalize_quat(), RENORMCOUNT, vadd(), vcopy(), vcross(), vdot(), and vscale().

Referenced by tachyon_spaceball_update().

axis_to_quat()

void axis_to_quat	(	float	a[3],
		float	phi,
		float	q[4]
	)

Definition at line 206 of file trackball.c.

References vcopy(), vnormal(), and vscale().

Referenced by tachyon_spaceball_update(), and trackball().

build_rotmatrix()

void build_rotmatrix	(	float	m[4][4],
		float	q[4]
	)

Definition at line 302 of file trackball.c.

Referenced by tachyon_spaceball_update().

normalize_quat()

static void normalize_quat ( float  q[4] )

static

Definition at line 288 of file trackball.c.

Referenced by add_quats().

tb_project_to_sphere()

static float tb_project_to_sphere ( float  r, float  x, float  y  )

static

Definition at line 219 of file trackball.c.

Referenced by trackball().

trackball()

void trackball	(	float	q[4],
		float	p1x,
		float	p1y,
		float	p2x,
		float	p2y
	)

Definition at line 160 of file trackball.c.

References axis_to_quat(), tb_project_to_sphere(), TRACKBALLSIZE, vcross(), vlength(), vset(), vsub(), and vzero().

Referenced by tachyon_init_spaceball(), and tachyon_spaceball_update().

vadd()

void vadd	(	const float *	src1,
		const float *	src2,
		float *	dst
	)

Definition at line 140 of file trackball.c.

Referenced by add_quats().

vcopy()

void vcopy	(	const float *	v1,
		float *	v2
	)

Definition at line 95 of file trackball.c.

Referenced by add_quats(), axis_to_quat(), and vcross().

vcross()

void vcross	(	const float *	v1,
		const float *	v2,
		float *	cross
	)

Definition at line 103 of file trackball.c.

References cross(), and vcopy().

Referenced by add_quats(), and trackball().

vdot()

float vdot	(	const float *	v1,
		const float *	v2
	)

Definition at line 134 of file trackball.c.

Referenced by add_quats().

vlength()

float vlength

(

const float *

v

)

Definition at line 114 of file trackball.c.

Referenced by trackball(), and vnormal().

vnormal()

void vnormal

(

float *

v

)

Definition at line 128 of file trackball.c.

References vlength(), and vscale().

Referenced by axis_to_quat().

vscale()

void vscale	(	float *	v,
		float	div
	)

Definition at line 120 of file trackball.c.

Referenced by add_quats(), axis_to_quat(), and vnormal().

vset()

void vset	(	float *	v,
		float	x,
		float	y,
		float	z
	)

Definition at line 79 of file trackball.c.

Referenced by trackball().

vsub()

void vsub	(	const float *	src1,
		const float *	src2,
		float *	dst
	)

Definition at line 87 of file trackball.c.

Referenced by trackball().

vzero()

void vzero

(

float *

v

)

Definition at line 71 of file trackball.c.

Referenced by trackball().