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. More...
	Polygons2 (const QVector< Polygonal > &)
	Create a set of polygons. More...
	~Polygons2 ()
	Empty.
bool	Inside (const Vector2 &) const
	Test if a point is inside the union of a set of polygons. More...
double	RC (const Vector2 &) const
	Compute the squared distance between a point and a set of polygons. More...
void	Add (const Polygon2 &)
	Add a polygon to the set. More...
void	Draw (QGraphicsScene &, const QPen &=QPen(), const QBrush &=QBrush()) const
	Draw a polygon. More...

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.

Parameters

p	Set of polygons.

Member Function Documentation

Add()

void Polygons2::Add

(

const Polygon2 &

p

)

Add a polygon to the set.

Parameters

p

Polygon.

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

s	Set of polygons.
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.
s	Set of polygons.