Public Member Functions | Static Public Member Functions | Public Attributes | List of all members
ipe::Line Class Reference

#include <ipegeo.h>

Public Member Functions

 Line ()
 Line (const Vector &p, const Vector &dir)
double side (const Vector &p) const
Vector normal () const
double distance (const Vector &v) const
bool intersects (const Line &line, Vector &pt)
Vector project (const Vector &v) const
Vector dir () const

Static Public Member Functions

static Line through (const Vector &p, const Vector &q)

Public Attributes

Vector iP

Detailed Description

A directed line.

Constructor & Destructor Documentation

ipe::Line::Line ( )

Create default line (x-axis).

Line::Line ( const Vector p,
const Vector dir 

Construct a line from p with direction dir.

Asserts unit length of dir.

References ipe::Vector::sqLen().

Member Function Documentation

Line Line::through ( const Vector p,
const Vector q 

Construct a line through two points.

Referenced by ipe::Bezier::straight().

double Line::side ( const Vector p) const

Result is > 0, = 0, < 0 if point lies to the left, on, to the right.

Referenced by ipe::Bezier::intersect().

Vector ipe::Line::normal ( ) const

Return a normal vector pointing to the left of the directed line.

double Line::distance ( const Vector v) const

Returns distance between line and v.

References dir(), iP, ipe::Vector::len(), ipe::Vector::x, and ipe::Vector::y.

Referenced by ipe::Bezier::straight().

bool Line::intersects ( const Line line,
Vector pt 

Does this line intersect line? If so, computes intersection point.

Referenced by ipe::Snap::snap().

Vector Line::project ( const Vector v) const

Orthogonally project point v onto the line.

Referenced by ipe::Snap::setEdge(), and ipe::Snap::snap().

Vector ipe::Line::dir ( ) const

Return direction of line.

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

Member Data Documentation

Vector ipe::Line::iP

Point on the line.

Referenced by distance(), and ipe::Arc::intersect().

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