ClusterSequenceVoronoiArea::VoronoiAreaCalc Class Reference

class for carrying out a voronoi area calculation on a set of initial vectors More...

Public Member Functions
	VoronoiAreaCalc (const vector< PseudoJet >::const_iterator &, const vector< PseudoJet >::const_iterator &, double effective_R)
	constructor that takes a range of a vector together with the effective radius for the intersection of discs with voronoi cells
double	area (int index) const
	return the area of the particle associated with the given index
Private Member Functions
double	edge_circle_intersection (const Point &p0, const GraphEdge &edge)
	compute the intersection of one triangle with the circle the area is returned
double	circle_area (const double d12_2, double d01_2, double d02_2)
	get the area of a circle of radius R centred on the point 0 with 1 and 2 on each "side" of the arc.
Private Attributes
std::vector< double >	_areas
	areas, numbered as jets
double	_effective_R
	effective radius
double	_effective_R_squared
	effective radius squared

Detailed Description

class for carrying out a voronoi area calculation on a set of initial vectors

Definition at line 49 of file ClusterSequenceVoronoiArea.cc.

Constructor & Destructor Documentation

ClusterSequenceVoronoiArea::VoronoiAreaCalc::VoronoiAreaCalc	(	const vector< PseudoJet >::const_iterator &	,
		const vector< PseudoJet >::const_iterator &	,
		double	effective_R
	)

constructor that takes a range of a vector together with the effective radius for the intersection of discs with voronoi cells

Member Function Documentation

double ClusterSequenceVoronoiArea::VoronoiAreaCalc::area ( int index ) const [inline]

return the area of the particle associated with the given index

Definition at line 60 of file ClusterSequenceVoronoiArea.cc.

References _areas.

Referenced by ClusterSequenceVoronoiArea::_initializeVA().

00060 {return _areas[index];};

double ClusterSequenceVoronoiArea::VoronoiAreaCalc::circle_area	(	const double	d12_2,
		double	d01_2,
		double	d02_2
	)			`[inline, private]`

get the area of a circle of radius R centred on the point 0 with 1 and 2 on each "side" of the arc.

dij is the distance between point i and point j and all distances are squared

Definition at line 77 of file ClusterSequenceVoronoiArea.cc.

References _effective_R_squared.

00077                                                                            {
00078     return 0.5*_effective_R_squared
00079       *acos((d01_2+d02_2-d12_2)/(2*sqrt(d01_2*d02_2)));
00080   }