AABBox Class Reference

An axis-aligned bounding-box class. More...

#include <GeomMath.hpp>

Public Types
enum	Corner {   MinMinMin = 0 , MaxMinMin , MaxMaxMin , MinMaxMin ,   MinMinMax , MaxMinMax , MaxMaxMax , MinMaxMax ,   CORNERCOUNT }
	Identifies a corner of the AABB.
enum	Face {   Front = 0 , Back , Bottom , Top ,   Left , Right , FACECOUNT }
	Identifies a face of the AABB.

Public Member Functions
	AABBox ()
	Creates an AABBox with minimum vertex set to infinity and maximum vertex set to -infinity.
	AABBox (const Vec3f &min, const Vec3f &max)
	Creates an AABBox with the specified minimum and maximum extents.
void	expand (const Vec3f &vec)
	Updates the bounding box to include the specified vertex.
void	expand (const AABBox &box)
	Updates the bounding box to include the specified other AABB.
void	reset ()
	Resets minimum to infinity and maximum to -infinity (equivalent to creating a new AABBox with the default constructor)
bool	isValid () const
	Returns true when each component of the minimum extents is smaller than the corresponding component of the maximum extents. More...
float	getVolume () const
	Returns the volume of the bounding box.
Vec3f	getCorner (AABBox::Corner corner) const
	Returns the coordinates of the specified corner of the AABB.
Vec4f	getPlane (AABBox::Face p) const
	Return the plane equation in the general form for the specified face of the AABB as Vec4f.
Vec3f	positiveVertex (Vec3f &normal) const
	Returns a Vec3f that for each component either: More...
Vec3f	negativeVertex (Vec3f &normal) const
	Returns a Vec3f that for each component either: More...

Data Fields
Vec3f	min
	The minimal extents of the box.
Vec3f	max
	The maximal extents of the box.

Detailed Description

An axis-aligned bounding-box class.

Member Function Documentation

isValid()

bool AABBox::isValid

(

)

const

Returns true when each component of the minimum extents is smaller than the corresponding component of the maximum extents.

This allows to detect empty (or freshly created) boxes with negative volume, or AABBs with only a single vertex (where the minimum and maximum extents are the same).

negativeVertex()

Vec3f AABBox::negativeVertex

(

Vec3f &

normal

)

const

Returns a Vec3f that for each component either:

• returns the corresponding component of the maximum extents of the AABB if the component of the normal parameter is less than zero,
• or the component of the minimum extents of the AABBox otherwise.

positiveVertex()

Vec3f AABBox::positiveVertex

(

Vec3f &

normal

)

const

Returns a Vec3f that for each component either:

• returns the corresponding component of the minimum extents of the AABB if the component of the normal parameter is less than zero,
• or the component of the maximum extents of the AABBox otherwise.