Dt3dBoundingVolume Class Reference

A 3d bounding volume. More...

Collaboration diagram for Dt3dBoundingVolume:

Public Member Functions
	Dt3dBoundingVolume ()
	Dt3dBoundingVolume (const Dt3dBoundingVolume &orig)
	Copy constructor.
	Dt3dBoundingVolume (double halfLength, double halfWidth, double halfHeight)
	Dt3dBoundingVolume (double halfLength, double halfWidth, double halfHeight, double lengthOffset, double widthOffset, double heightOffset)
	Dt3dBoundingVolume (double halfLength, double halfWidth, double halfHeight, const DtVector &latticeOffset)
virtual	~Dt3dBoundingVolume ()
Dt3dBoundingVolume &	operator= (const Dt3dBoundingVolume &orig)
	Assignment operator.
bool	operator== (const Dt3dBoundingVolume &other) const
	Equality operator.
bool	operator!= (const Dt3dBoundingVolume &other) const
	Non-equality operator.
virtual void	setToDefault ()
virtual double	length () const
virtual double	width () const
virtual double	height () const
virtual double	halfLength () const
virtual double	halfWidth () const
virtual double	halfHeight () const
virtual double	boundingRadius () const
	The radius is calculated from other data, and is always valid.
virtual void	setHalfLengthWidthHeight (double halfLength, double halfWidth, double halfHeight)
virtual void	setHalfLength (double newHalfLength)
virtual void	setLatticeOffset (const DtVector &newOffset)
virtual void	setLatticeOffset (double lengthOffset, double widthOffset, double heightOffset)
virtual void	clearLatticeOffset ()
virtual const DtVector &	latticeOffset () const
virtual bool	isOffset () const
virtual double	offsetLength () const
virtual void	stretchForward (double x, double y)
	Stretch bounding volume forward/backward.
virtual void	stretchBackward (double x, double y)
	Stretch bounding volume forward/backward.

Protected Attributes
DtVector	myHalfDimensions
DtVector	myLatticeOffset
	Diagonal of associated matrix.
bool	myIsOffset
double	myOffsetLength
	true if offset is non-zero.
double	myBoundingRadius

Detailed Description

A 3d bounding volume.

Fast "how to use" guide:

1. Set the dimensions of the bounding volume.
2. Set the offset of the bounding volume (optional).

Note #2: The BV is aligned with an internal lattice coordinate system. The length is aligned with the x-axis. The width is aligned with the y-axis. The height is aligned with the z-axis (not shown).

The offset is the vector from the origin of this lattice coordinate system (0,0,0) to the center of the BV.

y /\ | --------— | | .5 | | | len | | | *-—>| * is the center of the BV | | /| .5 | | | / |width| | |/ \/ | | / ------— | / | / diagonal line is the offset | / | / |/___________________________________\ x (0,0,0) /

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Additional info based on our chosen implementation.

For convenience, we often use a vector to represent the 3 components of the bounding box dimensions. The dimensions are specified as follows: half length == "forward" == x component == vector[0] half width == "right" == y component == vector[1] half height == "down" == z component == vector[2] The vector also represents the vector from the center of the BV to the front, right, bottom corner of the BV.

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

• 3dBoundingVolume.h