ogdf::DPolygon Class Reference

Polygons with real coordinates. More...

#include <ogdf/basic/geometry.h>

Inheritance diagram for ogdf::DPolygon:

Public Member Functions
	DPolygon (bool cc=true)
	Creates an empty polygon.
	DPolygon (const DPolygon &dop)
	Copy constructor.
	DPolygon (const DRect &rect, bool cc=true)
	Creates a polgon from a rectangle.
bool	containsPoint (DPoint &p) const
	Checks wether a Point /a p is inside the Poylgon or not.
bool	counterclock ()
	Returns true iff points are given in counter-clockwise order.
int	getCrossPoints (const DPolygon &p, List< DPoint > &crossPoints) const
	Returns the list of intersection points of this polygon with p.
void	insertCrossPoint (const DPoint &p)
	Inserts point p on every segment (a,b) with p in the open range ]a, b[.
ListIterator< DPoint >	insertPoint (const DPoint &p)
	Inserts point p, that must lie on a polygon segment.
ListIterator< DPoint >	insertPoint (const DPoint &p, ListIterator< DPoint > p1, ListIterator< DPoint > p2)
	Inserts point p, but just searching from point p1 to p2.
void	normalize ()
	Deletes all points, which are not facets.
DPolygon &	operator= (const DPolygon &dop)
	Assignment operator.
DPolygon &	operator= (const DRect &rect)
	Assignment operator (for assigning from a rectangle).
DSegment	segment (ListConstIterator< DPoint > it) const
	Returns the line segment that starts at position it.
void	unify ()
	Deletes all consecutive points that are equal.
Public Member Functions inherited from ogdf::GenericPolyline< PointType >
	GenericPolyline ()
	Creates an empty polyline.
	GenericPolyline (const GenericPolyline< PointType > &pl)
	Copy constructor.
	GenericPolyline (const List< PointType > &pl)
	Creates a polyline using the list of points pl.
double	length () const
	Returns the Euclidean length of the polyline.
void	normalize (double minAngle=Math::pi)
	Deletes all redundant points on the polyline that lie on a (nearly) straight line given by their adjacent points.
void	normalize (PointType src, PointType tgt, double minAngle=Math::pi)
	Deletes all redundant points on the polyline that lie on a (nearly) straight line given by their adjacent points.
GenericPolyline< PointType > &	operator= (const GenericPolyline &pl)
	Assignment operator.
DPoint	position (const double fraction, double len=-1.0) const
	Returns a point on the polyline which is fraction * len away from the start point.
void	unify ()
	Deletes all successive points with equal coordinates.
Public Member Functions inherited from ogdf::List< PointType >
	List ()
	Constructs an empty doubly linked list.
	List (const List< PointType > &L)
	Constructs a doubly linked list that is a copy of L.
	List (List< PointType > &&L)
	Constructs a doubly linked list containing the elements of L (move semantics).
	List (std::initializer_list< PointType > init)
	Constructs a doubly linked list containing the elements in init.
int	size () const
	Returns the number of elements in the list.
const ListPure< PointType > &	getListPure () const
	Conversion to const ListPure.
List< PointType > &	operator= (const List< PointType > &L)
	Assignment operator.
List< PointType > &	operator= (List< PointType > &&L)
	Assignment operator (move semantics).
bool	operator== (const List< PointType > &L) const
	Equality operator.
bool	operator!= (const List< PointType > &L) const
	Inequality operator.
iterator	pushFront (const PointType &x)
	Adds element x at the beginning of the list.
iterator	emplaceFront (Args &&... args)
	Adds a new element at the beginning of the list.
iterator	pushBack (const PointType &x)
	Adds element x at the end of the list.
iterator	emplaceBack (Args &&... args)
	Adds a new element at the end of the list.
iterator	insert (const PointType &x, iterator it, Direction dir=Direction::after)
	Inserts element x before or after it.
iterator	insertBefore (const PointType &x, iterator it)
	Inserts element x before it.
iterator	insertAfter (const PointType &x, iterator it)
	Inserts element x after it.
void	popFront ()
	Removes the first element from the list.
PointType	popFrontRet ()
	Removes the first element from the list and returns it.
void	popBack ()
	Removes the last element from the list.
PointType	popBackRet ()
	Removes the last element from the list and returns it.
void	del (iterator it)
	Removes it from the list.
bool	removeFirst (const PointType &x)
	Removes the first occurrence of x (if any) from the list.
void	clear ()
	Removes all elements from the list.
void	moveToFront (iterator it, List< PointType > &L2)
	Moves it to the begin of the list.
void	moveToBack (iterator it, List< PointType > &L2)
	Moves it to the end of the list.
void	moveToSucc (iterator it, List< PointType > &L2, iterator itBefore)
	Moves it after itBefore.
void	moveToPrec (iterator it, List< PointType > &L2, iterator itAfter)
	Moves it before itAfter.
void	conc (List< PointType > &L2)
	Appends L2 to this list and makes L2 empty.
void	concFront (List< PointType > &L2)
	Prepends L2 to this list and makes L2 empty.
void	swap (List< PointType > &other)
	Exchanges the contents of this list and other in constant time.
void	split (iterator it, List< PointType > &L1, List< PointType > &L2, Direction dir=Direction::before)
	Splits the list at element it into lists L1 and L2.

Protected Attributes
bool	m_counterclock
	If true points are given in conter-clockwise order.

Additional Inherited Members
Protected Member Functions inherited from ogdf::GenericPolyline< PointType >
void	normalizeUnified (double minAngle)
	Deletes all redundant points on the polyline that lie on a (nearly) straight line given by their adjacent points.

Detailed Description

Polygons with real coordinates.

Definition at line 981 of file geometry.h.

Constructor & Destructor Documentation

DPolygon() [1/3]

ogdf::DPolygon::DPolygon ( bool  cc = true )

inline

Creates an empty polygon.

Parameters

cc	determines in which order the points will be given; true means counter-clockwise, false means clockwise.

Definition at line 992 of file geometry.h.

DPolygon() [2/3]

ogdf::DPolygon::DPolygon ( const DRect &  rect, bool  cc = true  )

inlineexplicit

Creates a polgon from a rectangle.

Definition at line 995 of file geometry.h.

DPolygon() [3/3]

ogdf::DPolygon::DPolygon ( const DPolygon &  dop )

inline

Copy constructor.

Definition at line 998 of file geometry.h.

Member Function Documentation

containsPoint()

bool ogdf::DPolygon::containsPoint

(

DPoint &

p

)

const

Checks wether a Point /a p is inside the Poylgon or not.

Note

Polygons with crossings have inner areas that count as outside!

p the Point to check.

return true if Point is inside.

counterclock()

bool ogdf::DPolygon::counterclock ( )

inline

Returns true iff points are given in counter-clockwise order.

Definition at line 1001 of file geometry.h.

getCrossPoints()

int ogdf::DPolygon::getCrossPoints	(	const DPolygon &	p,
		List< DPoint > &	crossPoints
	)		const

Returns the list of intersection points of this polygon with p.

insertCrossPoint()

void ogdf::DPolygon::insertCrossPoint

(

const DPoint &

p

)

Inserts point p on every segment (a,b) with p in the open range ]a, b[.

insertPoint() [1/2]

ListIterator< DPoint > ogdf::DPolygon::insertPoint ( const DPoint &  p )

inline

Inserts point p, that must lie on a polygon segment.

Definition at line 1017 of file geometry.h.

insertPoint() [2/2]

ListIterator< DPoint > ogdf::DPolygon::insertPoint	(	const DPoint &	p,
		ListIterator< DPoint >	p1,
		ListIterator< DPoint >	p2
	)

Inserts point p, but just searching from point p1 to p2.

That is, from the segment starting at p1 to the segment ending at p2.

normalize()

void ogdf::DPolygon::normalize

(

)

Deletes all points, which are not facets.

operator=() [1/2]

DPolygon & ogdf::DPolygon::operator= ( const DPolygon &  dop )

inline

Assignment operator.

Definition at line 1004 of file geometry.h.

operator=() [2/2]

DPolygon & ogdf::DPolygon::operator=

(

const DRect &

rect

)

Assignment operator (for assigning from a rectangle).

segment()

DSegment ogdf::DPolygon::segment

(

ListConstIterator< DPoint >

it

)

const

Returns the line segment that starts at position it.

unify()

void ogdf::DPolygon::unify

(

)

Deletes all consecutive points that are equal.

Member Data Documentation

m_counterclock

bool ogdf::DPolygon::m_counterclock

protected

If true points are given in conter-clockwise order.

Definition at line 983 of file geometry.h.

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

• include/ogdf/basic/geometry.h