#include <ipegeo.h>

Public Member Functions
	Segment ()

	Segment (const Vector &p, const Vector &q)

Line	line () const

double	distance (const Vector &v, double bound) const

double	distance (const Vector &v) const

bool	project (const Vector &v, Vector &projection) const

bool	intersects (const Segment &seg, Vector &pt) const

bool	intersects (const Line &l, Vector &pt) const

bool	snap (const Vector &mouse, Vector &pos, double &bound) const

Public Attributes
Vector	iP

Vector	iQ

Detailed Description

A directed line segment.

Constructor & Destructor Documentation

◆ Segment() [1/2]

ipe::Segment::Segment ( )

inline

Create uninitialized segment.

◆ Segment() [2/2]

ipe::Segment::Segment	(	const Vector &	p,
		const Vector &	q
	)

inlineexplicit

Member Function Documentation

◆ line()

Line ipe::Segment::line ( ) const

inline

Return directed line supporting the segment.

References iP, and iQ.

Referenced by ipe::Arc::intersect(), intersects(), and ipe::Snap::setEdge().

◆ distance() [1/2]

double Segment::distance	(	const Vector &	v,
		double	bound
	)		const

Returns distance between segment and point v, but may just return bound when its larger than bound.

References iP, and iQ.

Referenced by ipe::CurveSegment::distance().

◆ distance() [2/2]

double Segment::distance ( const Vector & v ) const

Returns distance between segment and point v

References ipe::Vector::factorize(), iP, and iQ.

◆ project()

bool Segment::project	(	const Vector &	v,
		Vector &	projection
	)		const

Project point v orthogonally on segment. Returns false if the point falls outside the segment.

References ipe::Vector::factorize(), iP, and iQ.

Referenced by snap().

◆ intersects() [1/2]

bool Segment::intersects	(	const Segment &	seg,
		Vector &	pt
	)		const

Compute intersection point. Return false if segs don't intersect.

References iP, iQ, and line().

Referenced by intersects().

◆ intersects() [2/2]

bool Segment::intersects	(	const Line &	l,
		Vector &	pt
	)		const

Compute intersection point. Return false if no intersection.

References intersects(), iP, iQ, and line().

◆ snap()

bool Segment::snap	(	const Vector &	mouse,
		Vector &	pos,
		double &	bound
	)		const

Snap mouse position to this segment.

If distance between mouse and the segment is less than bound, then set pos to the point on the segment, bound to the distance, and return true.

References iP, iQ, project(), and ipe::Vector::snap().

Referenced by ipe::CurveSegment::snapBnd(), and ipe::CanvasBase::snapToPaperAndFrame().