AABB Class Reference

3-Dimensional Axis-Aligned Bounding Box More...

#include <AABB.h>

Inheritance diagram for AABB:

List of all members.

Public Member Functions
Constructors
	AABB ()
	AABB (const Vector3 &min_, const Vector3 &max_)
Main usage interface
bool	intersects (const Ray &ray, real_t &tMin, real_t &tMax) const
void	add (const Vector3 &v)
	unions this AABB with the given vector
void	add (const Point3 &p)
	unions this AABB with the given Point
void	add (const AABB &aabb)
	unions this AABB with the given AABB
bool	intersects (const AABB &aabb) const
bool	contains (const Point3 &p) const
void	preview () const
Accessors
Vector3	getDiagonal () const
Point3	getCenter () const
unsigned	getMaxExtent () const
unsigned	getMinExtent () const
real_t	getSurfaceArea () const
void	getMinMaxSurfaceArea (const unsigned axis, const real_t pos, real_t &leftArea, real_t &rightArea) const
AABB	getTransformed (const Matrix4x4 &trans) const
bool	isValid () const
bool	isPoint () const
Public Attributes
Vector3	min
Vector3	max

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Detailed Description

3-Dimensional Axis-Aligned Bounding Box

Author:

Travis Fischer (fisch0920@gmail.com)

Date:

Fall 2008

Definition at line 18 of file AABB.h.

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Constructor & Destructor Documentation

AABB::AABB

(

)

[inline]

Definition at line 25 of file AABB.h.

AABB::AABB	(	const Vector3 &	min_,
		const Vector3 &	max_
	)			[inline]

Definition at line 29 of file AABB.h.

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Member Function Documentation

bool AABB::intersects	(	const Ray &	ray,
		real_t &	tMin,
		real_t &	tMax
	)			const [inline]

Ray-box intersection using IEEE numerical properties to ensure that the test is both robust and efficient, as described in:

Amy Williams, Steve Barrus, R. Keith Morley, and Peter Shirley "An Efficient and Robust Ray-Box Intersection Algorithm" Journal of graphics tools, 10(1):49-54, 2005

Modified slightly by for the purposes of this program

Definition at line 23 of file AABB.inl.

void AABB::add

(

const Vector3 &

v

)

[inline]

unions this AABB with the given vector

Definition at line 56 of file AABB.inl.

void AABB::add

(

const Point3 &

p

)

[inline]

unions this AABB with the given Point

Definition at line 61 of file AABB.inl.

void AABB::add

(

const AABB &

aabb

)

[inline]

unions this AABB with the given AABB

Definition at line 65 of file AABB.inl.

bool AABB::intersects

(

const AABB &

aabb

)

const [inline]

Returns:

whether or not this AABB intersects the given AABB

Note:

inclusive with respect to boundaries

Definition at line 72 of file AABB.inl.

bool AABB::contains

(

const Point3 &

p

)

const [inline]

Returns:

whether or not this AABB contains the given point

Note:

inclusive with respect to boundaries of AABB

Definition at line 80 of file AABB.inl.

void AABB::preview

(

)

const

Definition at line 11 of file AABB.cpp.

Vector3 AABB::getDiagonal

(

)

const [inline]

Returns:

the diagonal of this AABB

Definition at line 86 of file AABB.inl.

Point3 AABB::getCenter

(

)

const [inline]

Definition at line 90 of file AABB.inl.

unsigned AABB::getMaxExtent

(

)

const [inline]

Returns:

the dominant (longest) axis along this AABB

Definition at line 94 of file AABB.inl.

unsigned AABB::getMinExtent

(

)

const [inline]

Returns:

the shortest axis along this AABB

Definition at line 102 of file AABB.inl.

real_t AABB::getSurfaceArea

(

)

const [inline]

Returns:

the surface area of this AABB

Definition at line 110 of file AABB.inl.

void AABB::getMinMaxSurfaceArea	(	const unsigned	axis,
		const real_t	pos,
		real_t &	leftArea,
		real_t &	rightArea
	)			const [inline]

Returns:

the surface area of the child AABBs split along the specified at

Note:

this is used extensively by the SAH kd-Tree

Definition at line 118 of file AABB.inl.

AABB AABB::getTransformed

(

const Matrix4x4 &

trans

)

const [inline]

Returns:

the tightest-fitting AABB after undergoing a transformation

Definition at line 136 of file AABB.inl.

bool AABB::isValid

(

)

const [inline]

Returns:

true if this AABB has been initialized with a min <= max

Note:

will be valid if 'min' is less than or equal to 'max'

Definition at line 168 of file AABB.inl.

bool AABB::isPoint

(

)

const [inline]

Returns:

true if this AABB represents a single point (min == max)

Note:

will be valid if 'min' is strictly less than 'max'

Definition at line 172 of file AABB.inl.

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Member Data Documentation

Vector3 AABB::min

Definition at line 19 of file AABB.h.

Vector3 AABB::max

Definition at line 20 of file AABB.h.

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The documentation for this class was generated from the following files:

• AABB.h
• AABB.cpp
• AABB.inl