Polygons2 Class Reference

Set of disjoint polygons. More...

#include <polygon.h>

Public Member Functions
	Polygons2 ()
	Empty.
	Polygons2 (const QVector< Polygon2 > &)
	Create a set of polygons.
	Polygons2 (const QVector< Polygonal > &)
	Create a set of polygons by projecting polygons in space.
int	Size () const
	Return the size of the set.
	~Polygons2 ()
	Empty.
bool	Inside (const Vector2 &) const
	Test if a point is inside the union of a set of polygons.
double	RC (const Vector2 &) const
	Compute the squared distance between a point and a set of polygons.
const Polygon2 &	At (int) const
	Access.
void	Add (const Polygon2 &)
	Add a polygon to the set.
void	Draw (QGraphicsScene &, const QPen &=QPen(), const QBrush &=QBrush()) const
	Draw a polygon.

Protected Attributes
QVector< Polygon2 >	poly
	Set of polygons.

Detailed Description

Set of disjoint polygons.

Constructor & Destructor Documentation

Polygons2() [1/2]

Polygons2::Polygons2

(

const QVector< Polygon2 > &

p

)

Create a set of polygons.

Parameters

p	Set of polygons.

Polygons2() [2/2]

Polygons2::Polygons2

(

const QVector< Polygonal > &

p

)

Create a set of polygons by projecting polygons in space.

Parameters

p	Set of polygons.

Member Function Documentation

Add()

void Polygons2::Add

(

const Polygon2 &

p

)

Add a polygon to the set.

Parameters

p

Polygon.

At()

const Polygon2 & Polygons2::At ( int i ) const

inline

Access.

Parameters

i

Index.

Draw()

void Polygons2::Draw	(	QGraphicsScene &	scene,
		const QPen &	pen = QPen(),
		const QBrush &	brush = QBrush() ) const

Draw a polygon.

Parameters

scene	Graphics scene.
pen	The pen.
brush	The brush, should the triangle be filled.

Inside()

bool Polygons2::Inside

(

const Vector2 &

p

)

const

Test if a point is inside the union of a set of polygons.

Polygons should be non intersecting. Polygons inside others will be considered as holes.

Parameters

p

Point.

RC()

double Polygons2::RC

(

const Vector2 &

p

)

const

Compute the squared distance between a point and a set of polygons.

Parameters

p

Point.