trackball.h File Reference

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Functions
void	trackball (float q[4], float p1x, float p1y, float p2x, float p2y)
void	add_quats (float *q1, float *q2, float *dest)
void	build_rotmatrix (float m[4][4], float q[4])
void	axis_to_quat (float a[3], float phi, float q[4])

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Function Documentation

void add_quats	(	float *	q1,
		float *	q2,
		float *	dest
	)

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]
	)

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().