U4DEngine::U4DOBB Class Reference

The U4DOBB class implements a represenatation of an Oriented-Bounding Box. More...

Public Member Functions
	U4DOBB ()
	Constructor which creates an OBB with zero halfwidth, center at zero position, with an identity orientation.
	U4DOBB (U4DVector3n &uHalfWidth)
	Constructor which createas an OBB with the given halfwidth, center at zero position, with an identity orientation.
	U4DOBB (U4DVector3n &uHalfWidth, U4DVector3n &uCenter, U4DMatrix3n &uOrientation)
	Constructor which creates an OBB with the given halfwidth, center position and orientation.
	~U4DOBB ()
	Destructor for the class.
bool	intersectionWithVolume (U4DPlane &uPlane)
	Method which testes if the OBB intersects with a 3D plane. More...
bool	intersectionWithVolume (U4DOBB *uOBB)
	Method which tests if OBB intersects another OBB. More...
U4DVector3n	closestPointToOBB (U4DVector3n &uPoint)
	Method which computes closest 3D vector to OBB from a given 3D point. More...
float	sqDistPointOBB (U4DVector3n &uPoint)
	Method which computes the square magnitude between a 3D point and a OBB. More...
std::vector< U4DVector3n >	computeVertexIntersectingPlane (U4DPlane &uPlane)
	Method which computes 3D vector produced by a intersecting plane. More...
void	setHalfwidth (U4DVector3n &uHalfwidth)
	Method which sets the OBB vector halfwidth. More...

Public Attributes
U4DVector3n	halfwidth
	Positive halfwidth of the OBB along each axis. More...
U4DMatrix3n	orientation
	Matrix containing the local orientation of the OBB. More...
U4DVector3n	center
	3D Vector containing the center point of the OBB More...

Detailed Description

The U4DOBB class implements a represenatation of an Oriented-Bounding Box.

Member Function Documentation

closestPointToOBB()

U4DVector3n U4DEngine::U4DOBB::closestPointToOBB

(

U4DVector3n &

uPoint

)

Method which computes closest 3D vector to OBB from a given 3D point.

Parameters

uPoint

3D point to compute proximity

Returns

Returns the closest 3D vector to OBB

computeVertexIntersectingPlane()

std::vector< U4DVector3n > U4DEngine::U4DOBB::computeVertexIntersectingPlane

(

U4DPlane &

uPlane

)

Method which computes 3D vector produced by a intersecting plane.

Parameters

uPlane

3D plane to compute intersection

Returns

Returns intersecting vectors produced by the plane intersection

intersectionWithVolume() [1/2]

bool U4DEngine::U4DOBB::intersectionWithVolume

(

U4DOBB *

uOBB

)

Method which tests if OBB intersects another OBB.

Parameters

uOBB	OBB to test intersection

Returns

Returns true if OBB intersects another OBB

intersectionWithVolume() [2/2]

bool U4DEngine::U4DOBB::intersectionWithVolume

(

U4DPlane &

uPlane

)

Method which testes if the OBB intersects with a 3D plane.

Parameters

uPlane

3D plane to test intersection

Returns

Returns true if OBB intersects with 3D plane

setHalfwidth()

void U4DEngine::U4DOBB::setHalfwidth

(

U4DVector3n &

uHalfwidth

)

Method which sets the OBB vector halfwidth.

Parameters

uHalfwidth

Vector halfwidth for the OBB

sqDistPointOBB()

float U4DEngine::U4DOBB::sqDistPointOBB

(

U4DVector3n &

uPoint

)

Method which computes the square magnitude between a 3D point and a OBB.

Parameters

uPoint

3D point to compute square magnitude

Returns

Returns square magnitude of 3D point to OBB. That is, it does not compute the square root of the magnitude

Member Data Documentation

center

U4DVector3n U4DEngine::U4DOBB::center

3D Vector containing the center point of the OBB

halfwidth

U4DVector3n U4DEngine::U4DOBB::halfwidth

Positive halfwidth of the OBB along each axis.

orientation

U4DMatrix3n U4DEngine::U4DOBB::orientation

Matrix containing the local orientation of the OBB.