col::ElemBox Class Reference

Elementary box, enclosing one polygon, for Boxtree. More...

Collaboration diagram for col::ElemBox:

[legend]List of all members.

Public Member Functions
	ElemBox ()
	Default constructor.
	ElemBox (const osg::FaceIterator &fi, const osg::MFPnt3f *points)
	Constructor.
void	set (const osg::FaceIterator &fi, const osg::MFPnt3f *points)
	Copy a polygon into an elementary box.
void	operator= (const ElemBox &source)
	Copy elementary box.
bool	operator== (const ElemBox &other) const
	Two elementary boxes are equal, if their polygons are equal.
Static Public Member Functions
static void	calcBox (const vector< ElemBox > &elem, const int left, const int right, Pnt3f *low, Pnt3f *high)
	Compute bbox enclosing all elementary boxes.
Public Attributes
Pnt3f	m_low
Pnt3f	m_high
const osg::MFPnt3f *	points
unsigned int	m_pgon [Boxtree::M_MaxNVertices]
unsigned int	m_nvertices
osg::GeometryPtr	geom
unsigned int	m_index
Pnt3f	m_center

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Detailed Description

Elementary box, enclosing one polygon, for Boxtree.

This is a helper class for Boxtree::build() only!

Author:

Gabriel Zachmann, written 1997, re-implemented on OSG in Mar 2002.

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Constructor & Destructor Documentation

col::ElemBox::ElemBox	(	const osg::FaceIterator &	fi,
		const osg::MFPnt3f *	nodepoints
	)

Constructor.

See also:

ElemBox::set

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Member Function Documentation

void col::ElemBox::set	(	const osg::FaceIterator &	fi,
		const osg::MFPnt3f *	nodepoints
	)

Copy a polygon into an elementary box.

Parameters:

	fi	face iterator
	nodepoints	the array of points of the geometry

Copies the number of vertices, vertex indices, and pgon's index of the polygon the FaceIterator fi is pointing to into the elementary box. The index is the one returned from the iterator, not the one in the Geometry's array!

Calculate and set the barycenter of the elementary box.

Todo:

Warum werden bei GL_QUAD_STRIP die letzten beiden Vertices immer geswappt??

bool col::ElemBox::operator==

(

const ElemBox &

other

)

const

Two elementary boxes are equal, if their polygons are equal.

Bug:

Does not work if the polygons are the same but the start index is different!

void col::ElemBox::calcBox	(	const vector< ElemBox > &	elem,
		const int	left,
		const int	right,
		Pnt3f *	low,
		Pnt3f *	high
	)			[static]

Compute bbox enclosing all elementary boxes.

Parameters:

	elem	array of elementary boxes
	left,right	consider only elems from left..right (inclusively)
	low,high	resulting bbox (out)

The box will not be increased by NearZero, because this has already been done for the elementary boxes.

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

• ColBoxtree.h
• ColBoxtree.cpp

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