LineSegment2D Class Reference

2D line segment. More...

#include <LineSegment2D.h>

Inheritance diagram for LineSegment2D:

Collaboration diagram for LineSegment2D:

Public Member Functions
	LineSegment2D (const HepGeom::Point3D< double > &point1, const HepGeom::Point3D< double > &point2)
	Constructor. More...
	~LineSegment2D ()
	Destructor.
int	findIntersection (const Line2D &line, HepGeom::Point3D< double > *intersection) const
	Find intersection with a line. More...
int	findIntersection (const LineSegment2D &lineSegment, HepGeom::Point3D< double > *intersection) const
	Find intersection with a line segment. More...
int	findIntersection (const Circle2D &circle, HepGeom::Point3D< double > intersections[2]) const
	Find intersections with a circle. More...
int	findIntersection (const Arc2D &arc, HepGeom::Point3D< double > intersections[2]) const
	Find intersections with an arc. More...
bool	tWithinRange (double t) const
	Check if t is within the line segment (0 <= t <= 1). More...
const HepGeom::Point3D< double > &	getInitialPoint () const
	Get initial point.
const HepGeom::Vector3D< double > &	getVector () const
	Get vector.
int	findIntersection (const Line2D &line, HepGeom::Point3D< double > *intersection, double t[2]) const
	Find intersection with a line. More...

Protected Member Functions
int	findIntersection (const Circle2D &circle, HepGeom::Point3D< double > intersections[2], double t[2], double angles[2]) const
	Find intersections with a circle. More...
int	selectIntersections (HepGeom::Point3D< double > *intersections, bool *condition, int n) const
	Select intersections. More...

Protected Attributes
HepGeom::Point3D< double >	m_Point
	Initial point.
HepGeom::Vector3D< double >	m_Vector
	Vector.

Detailed Description

2D line segment.

Equation: m_Point + m_Vector * t, t = [0, 1].

Definition at line 28 of file LineSegment2D.h.

Constructor & Destructor Documentation

LineSegment2D()

LineSegment2D	(	const HepGeom::Point3D< double > &	point1,
		const HepGeom::Point3D< double > &	point2
	)

Constructor.

Parameters

[in]	point1	First point.
[in]	point2	Second point.

Definition at line 14 of file LineSegment2D.cc.

                                                                         :
  Line2D(point1.x(), point1.y(),
         point2.x() - point1.x(), point2.y() - point1.y())
{
}

Member Function Documentation

findIntersection() [1/6]

int findIntersection	(	const Arc2D &	arc,
		HepGeom::Point3D< double >	intersections[2]
	)		const

Find intersections with an arc.

Parameters

[in]	arc	Arc.
[out]	intersections	Intersections.

Returns

Number of intersections (0, 1 or 2).

Definition at line 67 of file LineSegment2D.cc.

findIntersection() [2/6]

int findIntersection	(	const Circle2D &	circle,
		HepGeom::Point3D< double >	intersections[2]
	)		const

Find intersections with a circle.

Parameters

[in]	circle	Circle.
[out]	intersections	Intersections.

Returns

Number of intersections (0, 1 or 2).

Definition at line 54 of file LineSegment2D.cc.

findIntersection() [3/6]

int findIntersection ( const Circle2D &  circle, HepGeom::Point3D< double >  intersections[2], double  t[2], double  angles[2]  ) const

protectedinherited

Find intersections with a circle.

Parameters

[in]	circle	Circle.
[out]	intersections	Intersections.
[out]	t	Values of t for intersection points.
[out]	angles	Values of angles for intersection points.

Returns

Number of intersections (0, 1 or 2).

Definition at line 95 of file Line2D.cc.

findIntersection() [4/6]

int findIntersection	(	const Line2D &	line,
		HepGeom::Point3D< double > *	intersection
	)		const

Find intersection with a line.

Parameters

[in]	line	Line.
[out]	intersection	Intersection.

Returns

Number of intersections (0 or 1).

Definition at line 25 of file LineSegment2D.cc.

findIntersection() [5/6]

int findIntersection ( const Line2D &  line, HepGeom::Point3D< double > *  intersection, double  t[2]  ) const

inherited

Find intersection with a line.

Parameters

[in]	line	Line.
[out]	intersection	Intersection.
[out]	t	Values of t for intersection point (t[0] - this line, t[1] - line from argument).

Returns

Number of intersections (0 or 1).

If (*this) and line are the same line then 0 is returned.

Definition at line 65 of file Line2D.cc.

findIntersection() [6/6]

int findIntersection	(	const LineSegment2D &	lineSegment,
		HepGeom::Point3D< double > *	intersection
	)		const

Find intersection with a line segment.

Parameters

[in]	lineSegment	Line segment.
[out]	intersection	Intersection.

Returns

Number of intersections (0 or 1).

Definition at line 40 of file LineSegment2D.cc.

selectIntersections()

int selectIntersections ( HepGeom::Point3D< double > *  intersections, bool *  condition, int  n  ) const

protectedinherited

Select intersections.

Parameters

[in,out]	intersections	Intersections.
[in]	condition	Selection condition.
[in]	n	Number of intersections.

Returns

Number of selected intersections.

Definition at line 132 of file Line2D.cc.

tWithinRange()

bool tWithinRange

(

double

t

)

const

Check if t is within the line segment (0 <= t <= 1).

Parameters

[in]

t

Line parameter.

Definition at line 80 of file LineSegment2D.cc.

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

• klm/eklm/geometry/include/LineSegment2D.h
• klm/eklm/geometry/src/LineSegment2D.cc