btBoxCollision.h File Reference

#include "LinearMath/btTransform.h"

Go to the source code of this file.

Defines
#define	BT_SWAP_NUMBERS(a, b)
	Swap numbers.
#define	BT_MAX(a, b)   (a<b?b:a)
#define	BT_MIN(a, b)   (a>b?b:a)
#define	BT_GREATER(x, y)   btFabs(x) > (y)
#define	BT_MAX3(a, b, c)   BT_MAX(a,BT_MAX(b,c))
#define	BT_MIN3(a, b, c)   BT_MIN(a,BT_MIN(b,c))
#define	TEST_CROSS_EDGE_BOX_MCR(edge, absolute_edge, pointa, pointb, _extend, i_dir_0, i_dir_1, i_comp_0, i_comp_1)
#define	TEST_CROSS_EDGE_BOX_X_AXIS_MCR(edge, absolute_edge, pointa, pointb, _extend)
#define	TEST_CROSS_EDGE_BOX_Y_AXIS_MCR(edge, absolute_edge, pointa, pointb, _extend)
#define	TEST_CROSS_EDGE_BOX_Z_AXIS_MCR(edge, absolute_edge, pointa, pointb, _extend)
#define	BOX_PLANE_EPSILON   0.000001f
Enumerations
enum	eBT_PLANE_INTERSECTION_TYPE { BT_CONST_BACK_PLANE = 0, BT_CONST_COLLIDE_PLANE, BT_CONST_FRONT_PLANE }
Functions
SIMD_FORCE_INLINE btScalar	bt_mat3_dot_col (const btMatrix3x3 &mat, const btVector3 &vec3, int colindex)
	Returns the dot product between a vec3f and the col of a matrix.
	ATTRIBUTE_ALIGNED16 (class) BT_BOX_BOX_TRANSFORM_CACHE
	Class for transforming a model1 to the space of model0.
SIMD_FORCE_INLINE bool	btCompareTransformsEqual (const btTransform &t1, const btTransform &t2)
	Compairison of transformation objects.

---

Define Documentation

#define BOX_PLANE_EPSILON   0.000001f

Definition at line 228 of file btBoxCollision.h.

#define BT_GREATER	(		x,
			y
	)		btFabs(x) > (y)

Definition at line 41 of file btBoxCollision.h.

#define BT_MAX	(		a,
			b
	)		(a<b?b:a)

Definition at line 38 of file btBoxCollision.h.

#define BT_MAX3	(		a,
			b,
			c
	)		BT_MAX(a,BT_MAX(b,c))

Definition at line 43 of file btBoxCollision.h.

#define BT_MIN	(		a,
			b
	)		(a>b?b:a)

Definition at line 39 of file btBoxCollision.h.

#define BT_MIN3	(		a,
			b,
			c
	)		BT_MIN(a,BT_MIN(b,c))

Definition at line 44 of file btBoxCollision.h.

#define BT_SWAP_NUMBERS	(		a,
			b
	)

Value:

{ \
    a = a+b; \
    b = a-b; \
    a = a-b; \
}\

Swap numbers.

Definition at line 31 of file btBoxCollision.h.

Referenced by bt_segment_collision().

#define TEST_CROSS_EDGE_BOX_MCR	(		edge,
			absolute_edge,
			pointa,
			pointb,
			_extend,
			i_dir_0,
			i_dir_1,
			i_comp_0,
			i_comp_1
	)

Value:

{\
    const btScalar dir0 = -edge[i_dir_0];\
    const btScalar dir1 = edge[i_dir_1];\
    btScalar pmin = pointa[i_comp_0]*dir0 + pointa[i_comp_1]*dir1;\
    btScalar pmax = pointb[i_comp_0]*dir0 + pointb[i_comp_1]*dir1;\
    if(pmin>pmax)\
    {\
        BT_SWAP_NUMBERS(pmin,pmax); \
    }\
    const btScalar abs_dir0 = absolute_edge[i_dir_0];\
    const btScalar abs_dir1 = absolute_edge[i_dir_1];\
    const btScalar rad = _extend[i_comp_0] * abs_dir0 + _extend[i_comp_1] * abs_dir1;\
    if(pmin>rad || -rad>pmax) return false;\
}\

Definition at line 119 of file btBoxCollision.h.

#define TEST_CROSS_EDGE_BOX_X_AXIS_MCR	(		edge,
			absolute_edge,
			pointa,
			pointb,
			_extend
	)

Value:

{\
    TEST_CROSS_EDGE_BOX_MCR(edge,absolute_edge,pointa,pointb,_extend,2,1,1,2);\
}\

Definition at line 136 of file btBoxCollision.h.

#define TEST_CROSS_EDGE_BOX_Y_AXIS_MCR	(		edge,
			absolute_edge,
			pointa,
			pointb,
			_extend
	)

Value:

{\
    TEST_CROSS_EDGE_BOX_MCR(edge,absolute_edge,pointa,pointb,_extend,0,2,2,0);\
}\

Definition at line 141 of file btBoxCollision.h.

#define TEST_CROSS_EDGE_BOX_Z_AXIS_MCR	(		edge,
			absolute_edge,
			pointa,
			pointb,
			_extend
	)

Value:

{\
    TEST_CROSS_EDGE_BOX_MCR(edge,absolute_edge,pointa,pointb,_extend,1,0,0,1);\
}\

Definition at line 146 of file btBoxCollision.h.

---

Enumeration Type Documentation

enum eBT_PLANE_INTERSECTION_TYPE

Enumerator:

BT_CONST_BACK_PLANE
BT_CONST_COLLIDE_PLANE
BT_CONST_FRONT_PLANE

Definition at line 51 of file btBoxCollision.h.

---

Function Documentation

ATTRIBUTE_ALIGNED16

(

class

)

Class for transforming a model1 to the space of model0.

Axis aligned box.

< Transforms translation of model1 to model 0

< Transforms Rotation of model1 to model 0, equal to R0' * R1

< Absolute value of m_R1to0

Calc the transformation relative 1 to 0. Inverts matrics by transposing

Calcs the full invertion of the matrices. Useful for scaling matrices

Apply a transform to an AABB

Apply a transform to an AABB

Merges a Box

Merges a point

Gets the extend and center

Finds the intersecting box between this box and the other.

Finds the Ray intersection parameter.

Parameters:

aabb	Aligned box
vorigin	A vec3f with the origin of the ray
vdir	A vec3f with the direction of the ray

transcache is the transformation cache from box to this AABB

Simple test for planes.

test for a triangle, with edges

Definition at line 161 of file btBoxCollision.h.

References btFabs(), dot(), credits_svn_gen::e, btTransform::getBasis(), btTransform::getOrigin(), i, btMatrix3x3::inverse(), btTransform::inverse(), SIMD_FORCE_INLINE, and transform().

SIMD_FORCE_INLINE btScalar bt_mat3_dot_col	(	const btMatrix3x3 &	mat,
		const btVector3 &	vec3,
		int	colindex
	)

Returns the dot product between a vec3f and the col of a matrix.

Definition at line 153 of file btBoxCollision.h.

SIMD_FORCE_INLINE bool btCompareTransformsEqual	(	const btTransform &	t1,
		const btTransform &	t2
	)

Compairison of transformation objects.

Definition at line 635 of file btBoxCollision.h.

References btTransform::getBasis(), btTransform::getOrigin(), and btMatrix3x3::getRow().