btGeometryOperations.h File Reference

#include "btBoxCollision.h"

Go to the source code of this file.

Defines
#define	PLANEDIREPSILON   0.0000001f
#define	PARALELENORMALS   0.000001f
#define	BT_CLAMP(number, minval, maxval)   (number<minval?minval:(number>maxval?maxval:number))
Functions
SIMD_FORCE_INLINE void	bt_edge_plane (const btVector3 &e1, const btVector3 &e2, const btVector3 &normal, btVector4 &plane)
	Calc a plane from a triangle edge an a normal. plane is a vec4f.
SIMD_FORCE_INLINE void	bt_closest_point_on_segment (btVector3 &cp, const btVector3 &v, const btVector3 &e1, const btVector3 &e2)
SIMD_FORCE_INLINE int	bt_line_plane_collision (const btVector4 &plane, const btVector3 &vDir, const btVector3 &vPoint, btVector3 &pout, btScalar &tparam, btScalar tmin, btScalar tmax)
	line plane collision
SIMD_FORCE_INLINE void	bt_segment_collision (const btVector3 &vA1, const btVector3 &vA2, const btVector3 &vB1, const btVector3 &vB2, btVector3 &vPointA, btVector3 &vPointB)
	Find closest points on segments.

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Detailed Description

Author:

Francisco Leon Najera

Definition in file btGeometryOperations.h.

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Define Documentation

#define BT_CLAMP	(		number,
			minval,
			maxval
	)		(number<minval?minval:(number>maxval?maxval:number))

Definition at line 38 of file btGeometryOperations.h.

Referenced by bt_segment_collision().

#define PARALELENORMALS   0.000001f

Definition at line 35 of file btGeometryOperations.h.

#define PLANEDIREPSILON   0.0000001f

Definition at line 34 of file btGeometryOperations.h.

Referenced by bt_line_plane_collision().

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Function Documentation

SIMD_FORCE_INLINE void bt_closest_point_on_segment	(	btVector3 &	cp,
		const btVector3 &	v,
		const btVector3 &	e1,
		const btVector3 &	e2
	)

Finds the closest point(cp) to (v) on a segment (e1,e2)

Definition at line 54 of file btGeometryOperations.h.

Referenced by bt_segment_collision().

SIMD_FORCE_INLINE void bt_edge_plane	(	const btVector3 &	e1,
		const btVector3 &	e2,
		const btVector3 &	normal,
		btVector4 &	plane
	)

Calc a plane from a triangle edge an a normal. plane is a vec4f.

Definition at line 41 of file btGeometryOperations.h.

References cross(), and btVector4::setValue().

Referenced by btPrimitiveTriangle::get_edge_plane().

SIMD_FORCE_INLINE int bt_line_plane_collision	(	const btVector4 &	plane,
		const btVector3 &	vDir,
		const btVector3 &	vPoint,
		btVector3 &	pout,
		btScalar &	tparam,
		btScalar	tmin,
		btScalar	tmax
	)

line plane collision

Returns:

-0 if the ray never intersects -1 if the ray collides in front -2 if the ray collides in back

Definition at line 84 of file btGeometryOperations.h.

References bt_distance_point_plane(), btFabs(), and PLANEDIREPSILON.

Referenced by bt_segment_collision().

SIMD_FORCE_INLINE void bt_segment_collision	(	const btVector3 &	vA1,
		const btVector3 &	vA2,
		const btVector3 &	vB1,
		const btVector3 &	vB2,
		btVector3 &	vPointA,
		btVector3 &	vPointB
	)

Find closest points on segments.

Definition at line 121 of file btGeometryOperations.h.

References BT_CLAMP, bt_closest_point_on_segment(), bt_line_plane_collision(), BT_SWAP_NUMBERS, N, btVector4::setValue(), and SIMD_EPSILON.