3D box with an associated transformation matrix. More...

#include <Inventor/SbBox.h>

Inheritance diagram for SbXfBox3f:

Public Member Functions
	SbXfBox3f ()
	Constructor.

	SbXfBox3f (const SbVec3f &_min, const SbVec3f &_max)
	Constructor.

	SbXfBox3f (const SbBox3f &box)
	Constructor.

	~SbXfBox3f ()
	Destructor.

void	setTransform (const SbMatrix &m)
	Sets the transformation on the box.

const SbMatrix &	getTransform () const
	Gets the transformation on the box.

const SbMatrix &	getInverse () const
	Gets the inverse of the transformation on the box.

SbVec3f	getCenter () const
	Returns the center of the box.

void	extendBy (const SbVec3f &pt)
	Extends the box (if necessary) to contain the given 3D point.

void	extendBy (const SbBox3f &bb)
	Extends the box (if necessary) to contain the given box.

void	extendBy (const SbXfBox3f &bb)
	Extends the box (if necessary) to contain the given box.

SbBool	intersect (const SbVec3f &pt) const
	Returns TRUE if intersection of given point and this box is not empty.

SbBool	intersect (const SbBox3f &bb) const
	Returns TRUE if intersection of given box and this box is not empty.

SbXfBox3f &	setValue (const SbXfBox3d &xfbox3d)
	Sets value of the box from a double precision box.

void	setBounds (float xmin, float ymin, float zmin, float xmax, float ymax, float zmax)
	Sets the bounds of the box.

void	setBounds (const SbVec3f &_min, const SbVec3f &_max)
	Sets the bounds of the box.

void	getBounds (float &xmin, float &ymin, float &zmin, float &xmax, float &ymax, float &zmax) const
	Gets the bounds of the box.

void	getBounds (SbVec3f &_min, SbVec3f &_max) const
	Gets the bounds of the box.

void	getOrigin (float &originX, float &originY, float &originZ)
	Returns origin (minimum point) of the box.

void	getSize (float &sizeX, float &sizeY, float &sizeZ)
	Returns size of the box.

float	getVolume () const
	Gives the volume of the box (0 for an empty box).

void	makeEmpty ()
	Sets the box to contain nothing.

SbBool	isEmpty () const
	Returns TRUE if the box is empty, and FALSE otherwise.

SbBool	hasVolume () const
	Checks if the box has volume; i.e., all three dimensions have positive size.

void	getSpan (const SbVec3f &direction, float &dMin, float &dMax) const
	Finds the extent of the box along a particular direction.

void	transform (const SbMatrix &m)
	Transforms the box by the given matrix.

SbBox3f	project () const
	Projects an SbXfBox3f to an SbBox3f.

SbVec3f	getClosestPoint (const SbVec3f &point) const
	Returns the closest point on the box to the given point.

float	computeMaxDistance2 (const SbVec3f &p) const
	Returns the squared maximum distance between a point and the 8 bounding box's vertices.

Public Member Functions inherited from SbBox3f
	SbBox3f ()
	Constructor for a 3D float box.

	SbBox3f (float xmin, float ymin, float zmin, float xmax, float ymax, float zmax)
	Constructor for a 3D float box.

	SbBox3f (const SbVec3f &_min, const SbVec3f &_max)
	Constructor for a 3D float box.

	~SbBox3f ()
	Destructor.

const SbVec3f &	getMin () const
	Returns the minimum point of the box.

SbVec3f &	getMin ()
	Returns the minimum point of the box.

const SbVec3f &	getMax () const
	Returns the maximum point of the box.

SbVec3f &	getMax ()
	Returns the maximum point of the box.

SbVec3f	getCenter () const
	Returns the center of the box.

void	extendBy (const SbVec3f &pt)
	Extends this box (if necessary) to contain the specified point.

void	extendBy (const SbBox3f &bb)
	Extends this box (if necessary) to contain the specified box.

SbBool	intersect (const SbVec3f &pt) const
	Returns TRUE if the specified point intersects this box.

SbBool	intersect (const SbBox3f &bb) const
	Returns TRUE if the specified box intersects this box.

SbBox3f	intersection (const SbBox3f &box) const
	Returns the intersection of the specified box with this box.

SbBool	contains (const SbBox3f &bb) const
	Returns TRUE if the specified box is fully contained inside this box.

SbBool	outside (const SbMatrix &MVP, int &cullBits) const
	Returns TRUE if bounding box is completely outside the view-volume defined by the model+view+projection matrix given.

void	setBounds (float xmin, float ymin, float zmin, float xmax, float ymax, float zmax)
	Sets the corners of the box.

void	setBounds (const SbVec3f &_min, const SbVec3f &_max)
	Sets the corners of the box.

void	getBounds (float &xmin, float &ymin, float &zmin, float &xmax, float &ymax, float &zmax) const
	Gets the corners of the box.

void	getBounds (SbVec3f &_min, SbVec3f &_max) const
	Gets the corners of the box.

SbVec3f	getClosestPoint (const SbVec3f &point) const
	Returns the closest point on the box to the given point.

void	getOrigin (float &originX, float &originY, float &originZ) const
	Gets box origin which is the same as the minimum corner of the box.

void	getSize (float &sizeX, float &sizeY, float &sizeZ) const
	Gets box size.

SbVec3f	getSize () const
	Gets box size.

void	makeEmpty ()
	Makes an empty box.

SbBool	isEmpty () const
	Returns TRUE if the box is empty, and FALSE otherwise.

SbBool	hasVolume () const
	Returns TRUE if all three dimensions of the box have positive size, and FALSE otherwise.

void	getSpan (const SbVec3f &direction, float &dMin, float &dMax) const
	Finds the span of a box along a specified direction.

void	transform (const SbMatrix &m)
	Transforms box by matrix, enlarging box to contain result.

float	getVolume () const
	Returns the volume of the box.

template<typename T >
	SbBox3f (const T &b)
	Constructor that converts an arbitrary SbBox3 to an SbBox3f.

float	computeMaxDistance2 (const SbVec3f &p) const
	Returns the squared maximum distance between a point and the 8 bounding box's vertices.

SbBool	triangleBoxOverlap (const SbVec3f &u0, const SbVec3f &u1, const SbVec3f &u2) const
	Return true if the given triangle intersects the bounding box.

Friends
int	operator== (const SbXfBox3f &b1, const SbXfBox3f &b2)
	Equality comparison.

int	operator!= (const SbXfBox3f &b1, const SbXfBox3f &b2)
	Inequality comparison.

Detailed Description

3D box with an associated transformation matrix.

A 3D box with an arbitrary transformation applied. This class is useful when a box will be transformed frequently; if an SbBox3f is used for this purpose it will expand each time it is transformed in order to keep itself axis-aligned. Transformations can be accumulated on an SbXfBox3f without expanding the box, and after all transformations have been done, the box can be expanded to an axis-aligned box if necessary.

Constructor & Destructor Documentation

◆ SbXfBox3f() [1/3]

SbXfBox3f::SbXfBox3f ( )

Constructor.

The box is initially empty.

◆ SbXfBox3f() [2/3]

SbXfBox3f::SbXfBox3f	(	const SbVec3f &	_min,
		const SbVec3f &	_max
	)

Constructor.

◆ SbXfBox3f() [3/3]

SbXfBox3f::SbXfBox3f ( const SbBox3f & box )

Constructor.

◆ ~SbXfBox3f()

SbXfBox3f::~SbXfBox3f ( )

inline

Destructor.

Definition at line 1271 of file SbBox.h.

Member Function Documentation

◆ computeMaxDistance2()

float SbXfBox3f::computeMaxDistance2 ( const SbVec3f & p ) const

Returns the squared maximum distance between a point and the 8 bounding box's vertices.

◆ extendBy() [1/3]

void SbXfBox3f::extendBy ( const SbBox3f & bb )

inline

Extends the box (if necessary) to contain the given box.

If the box has had a non-identity transformation applied using the setTransform() method, the given SbBox3f is assumed to be in the transformed space.

Definition at line 1341 of file SbBox.h.

◆ extendBy() [2/3]

void SbXfBox3f::extendBy ( const SbVec3f & pt )

Extends the box (if necessary) to contain the given 3D point.

If the box has had a non-identity transformation applied using the setTransform() method, the point is assumed to be in the transformed space. For example, the following code sequence:

SbXfBox3f bbox;
bbox.extendBy(SbVec3f(0,0,0));
SbMatrix trans;
trans.setTranslate(SbVec3f(1,1,1));
bbox.setTransform(trans);
bbox.extendBy(SbVec3f(0,0,0));

will result in a bounding box extending from (-1,-1,-1) to (0,0,0) in the bbox's local (untransformed) space.

◆ extendBy() [3/3]

void SbXfBox3f::extendBy ( const SbXfBox3f & bb )

Extends the box (if necessary) to contain the given box.

◆ getBounds() [1/2]

void SbXfBox3f::getBounds	(	float &	xmin,
		float &	ymin,
		float &	zmin,
		float &	xmax,
		float &	ymax,
		float &	zmax
	)		const

inline

Gets the bounds of the box.

Definition at line 1381 of file SbBox.h.

◆ getBounds() [2/2]

void SbXfBox3f::getBounds	(	SbVec3f &	_min,
		SbVec3f &	_max
	)		const

inline

Gets the bounds of the box.

Definition at line 1389 of file SbBox.h.

◆ getCenter()

SbVec3f SbXfBox3f::getCenter ( ) const

Returns the center of the box.

◆ getClosestPoint()

SbVec3f SbXfBox3f::getClosestPoint ( const SbVec3f & point ) const

Returns the closest point on the box to the given point.

(Returns the point on the center of the Z face if passed the center.)

◆ getInverse()

const SbMatrix & SbXfBox3f::getInverse ( ) const

inline

Gets the inverse of the transformation on the box.

Definition at line 1288 of file SbBox.h.

◆ getOrigin()

void SbXfBox3f::getOrigin	(	float &	originX,
		float &	originY,
		float &	originZ
	)

inline

Returns origin (minimum point) of the box.

Definition at line 1395 of file SbBox.h.

◆ getSize()

void SbXfBox3f::getSize	(	float &	sizeX,
		float &	sizeY,
		float &	sizeZ
	)

inline

Returns size of the box.

Definition at line 1402 of file SbBox.h.

◆ getSpan()

void SbXfBox3f::getSpan	(	const SbVec3f &	direction,
		float &	dMin,
		float &	dMax
	)		const

inline

Finds the extent of the box along a particular direction.

Definition at line 1428 of file SbBox.h.

◆ getTransform()

const SbMatrix & SbXfBox3f::getTransform ( ) const

inline

Gets the transformation on the box.

Definition at line 1282 of file SbBox.h.

◆ getVolume()

float SbXfBox3f::getVolume ( ) const

Gives the volume of the box (0 for an empty box).

◆ hasVolume()

SbBool SbXfBox3f::hasVolume ( ) const

inline

Checks if the box has volume; i.e., all three dimensions have positive size.

Definition at line 1423 of file SbBox.h.

◆ intersect() [1/2]

SbBool SbXfBox3f::intersect ( const SbBox3f & bb ) const

inline

Returns TRUE if intersection of given box and this box is not empty.

Definition at line 1357 of file SbBox.h.

◆ intersect() [2/2]

SbBool SbXfBox3f::intersect ( const SbVec3f & pt ) const

Returns TRUE if intersection of given point and this box is not empty.

◆ isEmpty()

SbBool SbXfBox3f::isEmpty ( ) const

inline

Returns TRUE if the box is empty, and FALSE otherwise.

Note: Setting the box to all zeros does not make it "empty". Use the makeEmpty() method. (This method only returns true if the maximum X value is less than the minimum X value.)

Definition at line 1418 of file SbBox.h.

◆ makeEmpty()

void SbXfBox3f::makeEmpty ( )

inline

Sets the box to contain nothing.

Definition at line 1413 of file SbBox.h.

◆ project()

SbBox3f SbXfBox3f::project ( ) const

Projects an SbXfBox3f to an SbBox3f.

◆ setBounds() [1/2]

void SbXfBox3f::setBounds	(	const SbVec3f &	_min,
		const SbVec3f &	_max
	)

inline

Sets the bounds of the box.

Definition at line 1375 of file SbBox.h.

◆ setBounds() [2/2]

void SbXfBox3f::setBounds	(	float	xmin,
		float	ymin,
		float	zmin,
		float	xmax,
		float	ymax,
		float	zmax
	)

inline

Sets the bounds of the box.

Definition at line 1368 of file SbBox.h.

◆ setTransform()

void SbXfBox3f::setTransform ( const SbMatrix & m )

Sets the transformation on the box.

◆ setValue()

SbXfBox3f & SbXfBox3f::setValue ( const SbXfBox3d & xfbox3d )

inline

Sets value of the box from a double precision box.

Definition at line 1736 of file SbBox.h.

◆ transform()

void SbXfBox3f::transform ( const SbMatrix & m )

Transforms the box by the given matrix.

Friends And Related Symbol Documentation

◆ operator!=

int operator!=	(	const SbXfBox3f &	b1,
		const SbXfBox3f &	b2
	)

friend

Inequality comparison.

Definition at line 1460 of file SbBox.h.

◆ operator==

int operator==	(	const SbXfBox3f &	b1,
		const SbXfBox3f &	b2
	)

friend

Equality comparison.

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

Inventor/SbBox.h

Open Inventor Release 2024.2.0

Public Member Functions

Friends

Detailed Description

SEE ALSO

Constructor & Destructor Documentation

◆ SbXfBox3f() [1/3]

◆ SbXfBox3f() [2/3]

◆ SbXfBox3f() [3/3]

◆ ~SbXfBox3f()

Member Function Documentation

◆ computeMaxDistance2()

◆ extendBy() [1/3]

◆ extendBy() [2/3]

◆ extendBy() [3/3]

◆ getBounds() [1/2]

◆ getBounds() [2/2]

◆ getCenter()

◆ getClosestPoint()

◆ getInverse()

◆ getOrigin()

◆ getSize()

◆ getSpan()

◆ getTransform()

◆ getVolume()

◆ hasVolume()

◆ intersect() [1/2]

◆ intersect() [2/2]

◆ isEmpty()

◆ makeEmpty()

◆ project()

◆ setBounds() [1/2]

◆ setBounds() [2/2]

◆ setTransform()

◆ setValue()

◆ transform()

Friends And Related Symbol Documentation

◆ operator!=

◆ operator==