PointTriangle.h File Reference

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Macros
#define	vecdot(a, b)   ((a).x*(b).x + (a).y*(b).y + (a).z*(b).z)
#define	vecdotproduct(a, b)
#define	vecdiff(a, b)   ((coord){(a).x - (b).x, (a).y - (b).y, (a).z - (b).z})
#define	vecdist2(a, b)   (sq((a).x - (b).x) + sq((a).y - (b).y) + sq((a).z - (b).z))

Functions
double	PointTriangleDistance (const coord *P, const coord *P0, const coord *P1, const coord *P2, double *s, double *t)
	Returns the squared distance between point P and triangle P0, P1, P2.
int	PointTriangleOrientation (const coord *P, const coord *P0, const coord *P1, const coord *P2)
double	PointSegmentDistance (const coord *p, const coord *p0, const coord *p1, coord *segmentClosest, double *segmentParameter)
	Returns the squared distance between p and [p0:p1].
int	PointSegmentOrientation (const coord *P, const coord *P0, const coord *P1)

Macro Definition Documentation

vecdiff

#define vecdiff	(		a,
			b
	)		((coord){(a).x - (b).x, (a).y - (b).y, (a).z - (b).z})

Definition at line 7 of file PointTriangle.h.

vecdist2

#define vecdist2	(		a,
			b
	)		(sq((a).x - (b).x) + sq((a).y - (b).y) + sq((a).z - (b).z))

Definition at line 8 of file PointTriangle.h.

vecdot

#define vecdot	(		a,
			b
	)		((a).x*(b).x + (a).y*(b).y + (a).z*(b).z)

Definition at line 3 of file PointTriangle.h.

vecdotproduct

#define vecdotproduct	(		a,
			b
	)

Value:

                                    ((coord){(a).y*(b).z - (a).z*(b).y, \
                                    (a).z*(b).x - (a).x*(b).z,  \
                              (a).x*(b).y - (a).y*(b).x})

Definition at line 4 of file PointTriangle.h.

Function Documentation

PointSegmentDistance()

double PointSegmentDistance	(	const coord *	p,
		const coord *	p0,
		const coord *	p1,
		coord *	segmentClosest,
		double *	segmentParameter
	)

Returns the squared distance between p and [p0:p1].

Definition at line 263 of file PointTriangle.h.

References dimension, p, t, vecdiff, vecdot, and x.

Referenced by update_distance().

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PointSegmentOrientation()

int PointSegmentOrientation	(	const coord *	P,
		const coord *	P0,
		const coord *	P1
	)

Definition at line 308 of file PointTriangle.h.

References n, sign(), vecdiff, vecdotproduct, and x.

Referenced by update_distance().

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PointTriangleDistance()

double PointTriangleDistance	(	const coord *	P,
		const coord *	P0,
		const coord *	P1,
		const coord *	P2,
		double *	s,
		double *	t
	)

Returns the squared distance between point P and triangle P0, P1, P2.

Squared distance is returned in d2. s and t returns the closest point in parametric form in terms of edges P0P1 and P0P2.

Definition at line 15 of file PointTriangle.h.

References b1, c, HUGE, s, t, vecdiff, vecdot, and x.

Referenced by update_distance().

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PointTriangleOrientation()

int PointTriangleOrientation	(	const coord *	P,
		const coord *	P0,
		const coord *	P1,
		const coord *	P2
	)

Definition at line 248 of file PointTriangle.h.

References n, sign(), vecdiff, vecdot, vecdotproduct, and x.

Referenced by update_distance().

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