trackball.c File Reference

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

Include dependency graph for trackball.c:

Defines
#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])

---

Define Documentation

#define RENORMCOUNT   97

Referenced by add_quats().

#define TRACKBALLSIZE   (0.8)

Referenced by trackball().

---

Function Documentation

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

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

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

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

Referenced by trackball().

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

static void normalize_quat

(

float

q[4]

)

[static]

Referenced by add_quats().

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

Referenced by trackball().

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

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

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

Referenced by add_quats().

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

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

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

References vcopy().

Referenced by add_quats(), and trackball().

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

Referenced by add_quats().

float vlength

(

const float *

v

)

Referenced by trackball(), and vnormal().

void vnormal

(

float *

v

)

References vlength(), and vscale().

Referenced by axis_to_quat().

void vscale	(	float *	v,
		float	div
	)

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

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

Referenced by trackball().

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

Referenced by trackball().

void vzero

(

float *

v

)

Referenced by trackball().