A 3D box aligned with the x/y/z axes. More...

#include <OgreAxisAlignedBox.h>

Collaboration diagram for Ogre::AxisAlignedBox:

Public Types
enum	CornerEnum { FAR_LEFT_BOTTOM = 0, FAR_LEFT_TOP = 1, FAR_RIGHT_TOP = 2, FAR_RIGHT_BOTTOM = 3, NEAR_RIGHT_BOTTOM = 7, NEAR_LEFT_BOTTOM = 6, NEAR_LEFT_TOP = 5, NEAR_RIGHT_TOP = 4 }

enum	Extent { EXTENT_NULL, EXTENT_FINITE, EXTENT_INFINITE }

Public Member Functions
	AxisAlignedBox ()

	AxisAlignedBox (Extent e)

	AxisAlignedBox (const AxisAlignedBox &rkBox)

	AxisAlignedBox (const Vector3 &min, const Vector3 &max)

	AxisAlignedBox (Real mx, Real my, Real mz, Real Mx, Real My, Real Mz)

	~AxisAlignedBox ()

bool	contains (const Vector3 &v) const
	Tests whether the given point contained by this box. More...

bool	contains (const AxisAlignedBox &other) const
	Tests whether another box contained by this box. More...

Real	distance (const Vector3 &v) const
	Returns the minimum distance between a given point and any part of the box. More...

const Vector3 *	getAllCorners (void) const
	Returns a pointer to an array of 8 corner points, useful for collision vs. More...

Vector3	getCenter (void) const
	Gets the centre of the box. More...

Vector3	getCorner (CornerEnum cornerToGet) const
	gets the position of one of the corners More...

Vector3	getHalfSize (void) const
	Gets the half-size of the box. More...

const Vector3 &	getMaximum (void) const
	Gets the maximum corner of the box. More...

Vector3 &	getMaximum (void)
	Gets a modifiable version of the maximum corner of the box. More...

const Vector3 &	getMinimum (void) const
	Gets the minimum corner of the box. More...

Vector3 &	getMinimum (void)
	Gets a modifiable version of the minimum corner of the box. More...

Vector3	getSize (void) const
	Gets the size of the box. More...

AxisAlignedBox	intersection (const AxisAlignedBox &b2) const
	Calculate the area of intersection of this box and another. More...

bool	intersects (const AxisAlignedBox &b2) const
	Returns whether or not this box intersects another. More...

bool	intersects (const Sphere &s) const
	Tests whether this box intersects a sphere. More...

bool	intersects (const Plane &p) const
	Tests whether this box intersects a plane. More...

bool	intersects (const Vector3 &v) const
	Tests whether the vector point is within this box. More...

bool	isFinite (void) const
	Returns true if the box is finite. More...

bool	isInfinite (void) const
	Returns true if the box is infinite. More...

bool	isNull (void) const
	Returns true if the box is null i.e. More...

void	merge (const AxisAlignedBox &rhs)
	Merges the passed in box into the current box. More...

void	merge (const Vector3 &point)
	Extends the box to encompass the specified point (if needed). More...

bool	operator!= (const AxisAlignedBox &rhs) const
	Tests 2 boxes for inequality. More...

AxisAlignedBox &	operator= (const AxisAlignedBox &rhs)

bool	operator== (const AxisAlignedBox &rhs) const
	Tests 2 boxes for equality. More...

void	scale (const Vector3 &s)
	Scales the AABB by the vector given. More...

void	setExtents (const Vector3 &min, const Vector3 &max)
	Sets both minimum and maximum extents at once. More...

void	setExtents (Real mx, Real my, Real mz, Real Mx, Real My, Real Mz)

void	setInfinite ()
	Sets the box to 'infinite'. More...

void	setMaximum (const Vector3 &vec)
	Sets the maximum corner of the box. More...

void	setMaximum (Real x, Real y, Real z)

void	setMaximumX (Real x)
	Changes one of the components of the maximum corner of the box used to resize only one dimension of the box. More...

void	setMaximumY (Real y)

void	setMaximumZ (Real z)

void	setMinimum (const Vector3 &vec)
	Sets the minimum corner of the box. More...

void	setMinimum (Real x, Real y, Real z)

void	setMinimumX (Real x)
	Changes one of the components of the minimum corner of the box used to resize only one dimension of the box. More...

void	setMinimumY (Real y)

void	setMinimumZ (Real z)

void	setNull ()
	Sets the box to a 'null' value i.e. More...

void	transform (const Matrix4 &matrix)
	Transforms the box according to the matrix supplied. More...

void	transformAffine (const Matrix4 &m)
	Transforms the box according to the affine matrix supplied. More...

Real	volume (void) const
	Calculate the volume of this box. More...

Static Public Attributes
static const AxisAlignedBox	BOX_INFINITE

static const AxisAlignedBox	BOX_NULL

Protected Attributes
Vector3 *	mCorners

Extent	mExtent

Vector3	mMaximum

Vector3	mMinimum

Friends
_OgreExport friend std::ostream &	operator<< (std::ostream &o, const AxisAlignedBox aab)

Detailed Description

A 3D box aligned with the x/y/z axes.

Remarks: This class represents a simple box which is aligned with the axes. Internally it only stores 2 points as the extremeties of the box, one which is the minima of all 3 axes, and the other which is the maxima of all 3 axes. This class is typically used for an axis-aligned bounding box (AABB) for collision and visibility determination.

Definition at line 54 of file OgreAxisAlignedBox.h.

Member Enumeration Documentation

enum Ogre::AxisAlignedBox::CornerEnum

Enumerator
FAR_LEFT_BOTTOM
FAR_LEFT_TOP
FAR_RIGHT_TOP
FAR_RIGHT_BOTTOM
NEAR_RIGHT_BOTTOM
NEAR_LEFT_BOTTOM
NEAR_LEFT_TOP
NEAR_RIGHT_TOP

Definition at line 81 of file OgreAxisAlignedBox.h.

enum Ogre::AxisAlignedBox::Extent

Enumerator
EXTENT_NULL
EXTENT_FINITE
EXTENT_INFINITE

Definition at line 57 of file OgreAxisAlignedBox.h.

Constructor & Destructor Documentation

Ogre::AxisAlignedBox::AxisAlignedBox ( )

inline

Definition at line 91 of file OgreAxisAlignedBox.h.

Ogre::AxisAlignedBox::AxisAlignedBox ( Extent e )

inline

Definition at line 98 of file OgreAxisAlignedBox.h.

Ogre::AxisAlignedBox::AxisAlignedBox ( const AxisAlignedBox & rkBox )

inline

Definition at line 105 of file OgreAxisAlignedBox.h.

References isInfinite(), isNull(), mMaximum, and mMinimum.

Ogre::AxisAlignedBox::AxisAlignedBox	(	const Vector3 &	min,
		const Vector3 &	max
	)

inline

Definition at line 116 of file OgreAxisAlignedBox.h.

Ogre::AxisAlignedBox::AxisAlignedBox	(	Real	mx,
		Real	my,
		Real	mz,
		Real	Mx,
		Real	My,
		Real	Mz
	)

inline

Definition at line 121 of file OgreAxisAlignedBox.h.

Ogre::AxisAlignedBox::~AxisAlignedBox ( )

inline

Definition at line 141 of file OgreAxisAlignedBox.h.

References Ogre::MEMCATEGORY_SCENE_CONTROL, and OGRE_FREE.

Member Function Documentation

bool Ogre::AxisAlignedBox::contains ( const Vector3 & v ) const

inline

Tests whether the given point contained by this box.

Definition at line 751 of file OgreAxisAlignedBox.h.

References Ogre::Vector3::x, Ogre::Vector3::y, and Ogre::Vector3::z.

bool Ogre::AxisAlignedBox::contains ( const AxisAlignedBox & other ) const

inline

Tests whether another box contained by this box.

Definition at line 793 of file OgreAxisAlignedBox.h.

References isInfinite(), isNull(), mMaximum, mMinimum, Ogre::Vector3::x, Ogre::Vector3::y, and Ogre::Vector3::z.

Real Ogre::AxisAlignedBox::distance ( const Vector3 & v ) const

inline

Returns the minimum distance between a given point and any part of the box.

Definition at line 764 of file OgreAxisAlignedBox.h.

References Ogre::Vector3::x, Ogre::Vector3::y, and Ogre::Vector3::z.

const Vector3* Ogre::AxisAlignedBox::getAllCorners ( void ) const

inline

Returns a pointer to an array of 8 corner points, useful for collision vs.

non-aligned objects.

Remarks

If the order of these corners is important, they are as follows: The 4 points of the minimum Z face (note that because Ogre uses right-handed coordinates, the minimum Z is at the 'back' of the box) starting with the minimum point of all, then anticlockwise around this face (if you are looking onto the face from outside the box). Then the 4 points of the maximum Z face, starting with maximum point of all, then anticlockwise around this face (looking onto the face from outside the box). Like this:

1-----2
/|    /|
/ |   / |
5-----4  |
|  0--|--3
| /   | /
|/    |/
6-----7

as this implementation uses a static member, make sure to use your own copy !

Definition at line 302 of file OgreAxisAlignedBox.h.

References Ogre::MEMCATEGORY_SCENE_CONTROL, and OGRE_ALLOC_T.

Vector3 Ogre::AxisAlignedBox::getCenter ( void ) const

inline

Gets the centre of the box.

Definition at line 695 of file OgreAxisAlignedBox.h.

Referenced by Ogre::PlaneBoundedVolume::intersects().

Vector3 Ogre::AxisAlignedBox::getCorner ( CornerEnum cornerToGet ) const

inline

gets the position of one of the corners

Definition at line 330 of file OgreAxisAlignedBox.h.

Vector3 Ogre::AxisAlignedBox::getHalfSize ( void ) const

inline

Gets the half-size of the box.

Definition at line 727 of file OgreAxisAlignedBox.h.

References Ogre::Math::POS_INFINITY, and Ogre::Vector3::ZERO.

Referenced by Ogre::PlaneBoundedVolume::intersects().

const Vector3& Ogre::AxisAlignedBox::getMaximum ( void ) const

inline

Gets the maximum corner of the box.

Definition at line 165 of file OgreAxisAlignedBox.h.

Referenced by intersection().

Vector3& Ogre::AxisAlignedBox::getMaximum ( void )

inline

Gets a modifiable version of the maximum corner of the box.

Definition at line 173 of file OgreAxisAlignedBox.h.

const Vector3& Ogre::AxisAlignedBox::getMinimum ( void ) const

inline

Gets the minimum corner of the box.

Definition at line 150 of file OgreAxisAlignedBox.h.

Referenced by intersection().

Vector3& Ogre::AxisAlignedBox::getMinimum ( void )

inline

Gets a modifiable version of the minimum corner of the box.

Definition at line 158 of file OgreAxisAlignedBox.h.

Vector3 Ogre::AxisAlignedBox::getSize ( void ) const

inline

Gets the size of the box.

Definition at line 705 of file OgreAxisAlignedBox.h.

References Ogre::Math::POS_INFINITY, and Ogre::Vector3::ZERO.

AxisAlignedBox Ogre::AxisAlignedBox::intersection ( const AxisAlignedBox & b2 ) const

inline

Calculate the area of intersection of this box and another.

Definition at line 595 of file OgreAxisAlignedBox.h.

References getMaximum(), getMinimum(), isInfinite(), isNull(), Ogre::Vector3::makeCeil(), Ogre::Vector3::makeFloor(), Ogre::Vector3::x, Ogre::Vector3::y, and Ogre::Vector3::z.

bool Ogre::AxisAlignedBox::intersects ( const AxisAlignedBox & b2 ) const

inline

Returns whether or not this box intersects another.

Definition at line 564 of file OgreAxisAlignedBox.h.

References isInfinite(), isNull(), mMaximum, mMinimum, Ogre::Vector3::x, Ogre::Vector3::y, and Ogre::Vector3::z.

bool Ogre::AxisAlignedBox::intersects ( const Sphere & s ) const

inline

Tests whether this box intersects a sphere.

Definition at line 664 of file OgreAxisAlignedBox.h.

References Ogre::Math::intersects().

bool Ogre::AxisAlignedBox::intersects ( const Plane & p ) const

inline

Tests whether this box intersects a plane.

Definition at line 669 of file OgreAxisAlignedBox.h.

References Ogre::Math::intersects().

bool Ogre::AxisAlignedBox::intersects ( const Vector3 & v ) const

inline

Tests whether the vector point is within this box.

Definition at line 674 of file OgreAxisAlignedBox.h.

References Ogre::Vector3::x, Ogre::Vector3::y, and Ogre::Vector3::z.

bool Ogre::AxisAlignedBox::isFinite ( void ) const

inline

Returns true if the box is finite.

Definition at line 544 of file OgreAxisAlignedBox.h.

bool Ogre::AxisAlignedBox::isInfinite ( void ) const

inline

Returns true if the box is infinite.

Definition at line 558 of file OgreAxisAlignedBox.h.

Referenced by AxisAlignedBox(), contains(), intersection(), Ogre::PlaneBoundedVolume::intersects(), intersects(), and operator=().

bool Ogre::AxisAlignedBox::isNull ( void ) const

inline

Returns true if the box is null i.e.

empty.

Definition at line 537 of file OgreAxisAlignedBox.h.

Referenced by AxisAlignedBox(), contains(), intersection(), Ogre::PlaneBoundedVolume::intersects(), intersects(), and operator=().

void Ogre::AxisAlignedBox::merge ( const AxisAlignedBox & rhs )

inline

Merges the passed in box into the current box.

The result is the box which encompasses both.

Definition at line 380 of file OgreAxisAlignedBox.h.

References Ogre::Vector3::makeCeil(), Ogre::Vector3::makeFloor(), mExtent, mMaximum, and mMinimum.

void Ogre::AxisAlignedBox::merge ( const Vector3 & point )

inline

Extends the box to encompass the specified point (if needed).

Definition at line 412 of file OgreAxisAlignedBox.h.

bool Ogre::AxisAlignedBox::operator!= ( const AxisAlignedBox & rhs ) const

inline

Tests 2 boxes for inequality.

Definition at line 825 of file OgreAxisAlignedBox.h.

AxisAlignedBox& Ogre::AxisAlignedBox::operator= ( const AxisAlignedBox & rhs )

inline

Definition at line 128 of file OgreAxisAlignedBox.h.

References isInfinite(), isNull(), mMaximum, and mMinimum.

bool Ogre::AxisAlignedBox::operator== ( const AxisAlignedBox & rhs ) const

inline

Tests 2 boxes for equality.

Definition at line 811 of file OgreAxisAlignedBox.h.

References mExtent, mMaximum, and mMinimum.

void Ogre::AxisAlignedBox::scale ( const Vector3 & s )

inline

Scales the AABB by the vector given.

Definition at line 651 of file OgreAxisAlignedBox.h.

void Ogre::AxisAlignedBox::setExtents	(	const Vector3 &	min,
		const Vector3 &	max
	)

inline

Sets both minimum and maximum extents at once.

Definition at line 249 of file OgreAxisAlignedBox.h.

References Ogre::Vector3::x, Ogre::Vector3::y, and Ogre::Vector3::z.

void Ogre::AxisAlignedBox::setExtents	(	Real	mx,
		Real	my,
		Real	mz,
		Real	Mx,
		Real	My,
		Real	Mz
	)

inline

Definition at line 259 of file OgreAxisAlignedBox.h.

void Ogre::AxisAlignedBox::setInfinite ( )

inline

Sets the box to 'infinite'.

Definition at line 551 of file OgreAxisAlignedBox.h.

void Ogre::AxisAlignedBox::setMaximum ( const Vector3 & vec )

inline

Sets the maximum corner of the box.

Definition at line 215 of file OgreAxisAlignedBox.h.

void Ogre::AxisAlignedBox::setMaximum	(	Real	x,
		Real	y,
		Real	z
	)

inline

Definition at line 221 of file OgreAxisAlignedBox.h.

void Ogre::AxisAlignedBox::setMaximumX ( Real x )

inline

Changes one of the components of the maximum corner of the box used to resize only one dimension of the box.

Definition at line 232 of file OgreAxisAlignedBox.h.

void Ogre::AxisAlignedBox::setMaximumY ( Real y )

inline

Definition at line 237 of file OgreAxisAlignedBox.h.

void Ogre::AxisAlignedBox::setMaximumZ ( Real z )

inline

Definition at line 242 of file OgreAxisAlignedBox.h.

void Ogre::AxisAlignedBox::setMinimum ( const Vector3 & vec )

inline

Sets the minimum corner of the box.

Definition at line 181 of file OgreAxisAlignedBox.h.

void Ogre::AxisAlignedBox::setMinimum	(	Real	x,
		Real	y,
		Real	z
	)

inline

Definition at line 187 of file OgreAxisAlignedBox.h.

void Ogre::AxisAlignedBox::setMinimumX ( Real x )

inline

Changes one of the components of the minimum corner of the box used to resize only one dimension of the box.

Definition at line 198 of file OgreAxisAlignedBox.h.

void Ogre::AxisAlignedBox::setMinimumY ( Real y )

inline

Definition at line 203 of file OgreAxisAlignedBox.h.

void Ogre::AxisAlignedBox::setMinimumZ ( Real z )

inline

Definition at line 208 of file OgreAxisAlignedBox.h.

void Ogre::AxisAlignedBox::setNull ( )

inline

Sets the box to a 'null' value i.e.

not a box.

Definition at line 530 of file OgreAxisAlignedBox.h.

void Ogre::AxisAlignedBox::transform ( const Matrix4 & matrix )

inline

Transforms the box according to the matrix supplied.

Remarks: By calling this method you get the axis-aligned box which surrounds the transformed version of this box. Therefore each corner of the box is transformed by the matrix, then the extents are mapped back onto the axes to produce another AABB. Useful when you have a local AABB for an object which is then transformed.

Definition at line 441 of file OgreAxisAlignedBox.h.

References Ogre::Vector3::x, Ogre::Vector3::y, and Ogre::Vector3::z.

void Ogre::AxisAlignedBox::transformAffine ( const Matrix4 & m )

inline

Transforms the box according to the affine matrix supplied.

Remarks: By calling this method you get the axis-aligned box which surrounds the transformed version of this box. Therefore each corner of the box is transformed by the matrix, then the extents are mapped back onto the axes to produce another AABB. Useful when you have a local AABB for an object which is then transformed.

Note: The matrix must be an affine matrix.

See also: Matrix4::isAffine.

Definition at line 508 of file OgreAxisAlignedBox.h.

References Ogre::Math::Abs(), Ogre::Matrix4::isAffine(), Ogre::Matrix4::transformAffine(), Ogre::Vector3::x, Ogre::Vector3::y, and Ogre::Vector3::z.

Real Ogre::AxisAlignedBox::volume ( void ) const

inline

Calculate the volume of this box.

Definition at line 628 of file OgreAxisAlignedBox.h.

References Ogre::Math::POS_INFINITY, Ogre::Vector3::x, Ogre::Vector3::y, and Ogre::Vector3::z.

Friends And Related Function Documentation

_OgreExport friend std::ostream& operator<<	(	std::ostream &	o,
		const AxisAlignedBox	aab
	)

friend

Definition at line 355 of file OgreAxisAlignedBox.h.

Member Data Documentation

const AxisAlignedBox Ogre::AxisAlignedBox::BOX_INFINITE

static

Definition at line 832 of file OgreAxisAlignedBox.h.

const AxisAlignedBox Ogre::AxisAlignedBox::BOX_NULL

static

Definition at line 831 of file OgreAxisAlignedBox.h.

Vector3* Ogre::AxisAlignedBox::mCorners

mutableprotected

Definition at line 68 of file OgreAxisAlignedBox.h.

Extent Ogre::AxisAlignedBox::mExtent

protected

Definition at line 67 of file OgreAxisAlignedBox.h.

Referenced by merge(), and operator==().

Vector3 Ogre::AxisAlignedBox::mMaximum

protected

Definition at line 66 of file OgreAxisAlignedBox.h.

Referenced by AxisAlignedBox(), contains(), intersects(), merge(), operator=(), and operator==().

Vector3 Ogre::AxisAlignedBox::mMinimum

protected

Definition at line 65 of file OgreAxisAlignedBox.h.

Referenced by AxisAlignedBox(), contains(), intersects(), merge(), operator=(), and operator==().

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

OgreAxisAlignedBox.h

Public Types

Public Member Functions

Static Public Attributes

Protected Attributes

Friends

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation