btGeometryOperations.h File Reference

#include "btBoxCollision.h"

Go to the source code of this file.

Macros
#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.

Detailed Description

Author

Francisco Leon Najera

Definition in file btGeometryOperations.h.

Macro Definition Documentation

BT_CLAMP

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

Definition at line 33 of file btGeometryOperations.h.

Referenced by bt_segment_collision().

PARALELENORMALS

#define PARALELENORMALS   0.000001f

Definition at line 31 of file btGeometryOperations.h.

PLANEDIREPSILON

#define PLANEDIREPSILON   0.0000001f

Definition at line 30 of file btGeometryOperations.h.

Referenced by bt_line_plane_collision().

Function Documentation

bt_closest_point_on_segment()

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 47 of file btGeometryOperations.h.

References v.

Referenced by bt_segment_collision().

bt_edge_plane()

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 36 of file btGeometryOperations.h.

References cross().

Referenced by btPrimitiveTriangle::get_edge_plane().

bt_line_plane_collision()

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 76 of file btGeometryOperations.h.

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

Referenced by bt_segment_collision().

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 111 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.