Line calculations. More...

#include <liner.h>

Public Member Functions
	a2dLine (double x1=0, double y1=0, double x2=0, double y2=0)
	create a line with given end and begin point More...

	a2dLine (const a2dPoint2D &a, const a2dPoint2D &b)
	create a line with given end and begin point More...

	a2dLine (const a2dLine &other)

	~a2dLine ()
	destructor

a2dLine &	operator= (const a2dLine &other)

a2dPoint2D	GetBeginPoint () const
	Get the beginpoint from a a2dLine. More...

a2dPoint2D	GetEndPoint () const
	Get the endpoint from a a2dLine. More...

bool	CheckIntersect (a2dLine &line, double Marge) const
	Check if two wxLines intersects. More...

int	Intersect (a2dLine &line, a2dPoint2D &bp, a2dPoint2D &ep, double Marge) const
	Intersects two wxLines. More...

bool	Intersect (a2dLine &lijn, a2dPoint2D &crossing) const
	intersect two (infinit) lines More...

R_PointStatus	PointOnLine (const a2dPoint2D &a_Point, double &Distance, double Marge) const
	For an infinite a2dLine. More...

R_PointStatus	PointInLine (const a2dPoint2D &a_Point, double &Distance, double Marge) const
	For a non-infinite a2dLine. More...

a2dPoint2D	ProjectedPoint (const a2dPoint2D &p) const
	return point after projecting p to this line.

double	PointDistance (const a2dPoint2D &p, a2dPoint2D *nearest) const
	Calculate the distance of a point from the line. Works even if l==0. More...

double	PointDistanceOrhto (const a2dPoint2D &p, a2dPoint2D *nearest) const
	Calculate the orthogonal distance of a point from the line. Works even if l==0. More...

OUTPRODUCT	OutProduct (const a2dLine &two, double accur) const
	outproduct of two wxLines More...

double	Calculate_Y (double X) const
	Caclulate Y if X is known. More...

void	Virtual_Point (a2dPoint2D &a_point, double distance) const
	calculate point Perpendicula at distance from the line, through given point

a2dPoint2D	DistancePoint (double distance, bool begin) const
	calculate point on line at distance from the begin or end of line

a2dLine *	CreatePerpendicularLineAt (const a2dPoint2D &a_point) const
	create a line through a_point and which is pperpendicular to this

void	CalculateLineParameters ()
	Calculate the parameters if invalid. More...

void	OffsetContour (const a2dLine &nextline, double factor, a2dPoint2D &offsetpoint) const
	Calculate point for a contour at a given distance.

double	GetLength () const
	return length of vector

Detailed Description

Line calculations.

A line class to intersect lines and line segments.

Next to that the are point on/in Line and Line Segment tests. The class is designed to be accurate and can deal with vertical and horizontal lines. A snap factor (marge) is often required to do proper calculations

Definition at line 36 of file liner.h.

Constructor & Destructor Documentation

a2dLine::a2dLine	(	double	x1 = `0`,
		double	y1 = `0`,
		double	x2 = `0`,
		double	y2 = `0`
	)

create a line with given end and begin point

Remarks: line parameters will not be calculated automatically.

Parameters

x1	X begin point
y1	Y begin point
x2	X end point
y2	Y end point

Definition at line 21 of file liner.cpp.

a2dLine::a2dLine	(	const a2dPoint2D &	a,
		const a2dPoint2D &	b
	)

create a line with given end and begin point

Remarks: line parameters will not be calculated automatically.

Parameters

a	begin point
b	end point

Definition at line 34 of file liner.cpp.

Member Function Documentation

double a2dLine::Calculate_Y ( double X ) const

Caclulate Y if X is known.

Calculate the Y when the X is given.

Definition at line 294 of file liner.cpp.

void a2dLine::CalculateLineParameters ( )

Calculate the parameters if invalid.

Calculate the lineparameters for the a2dLine if nessecary.

Definition at line 355 of file liner.cpp.

bool a2dLine::CheckIntersect	(	a2dLine &	lijn,
		double	Marge
	)		const

Check if two wxLines intersects.

Checks if a a2dLine intersect with another a2dLine.

Parameters

line	line to intersect with
Marge	within volume at this distance still an intersection

Returns: true is intersecting

inout a2dLine : another a2dLine Marge: optional, standard on MARGE (declared in MISC.CPP)

return true : wxLines are crossing false: wxLines are not crossing

Definition at line 399 of file liner.cpp.

a2dPoint2D a2dLine::GetBeginPoint ( ) const

Get the beginpoint from a a2dLine.

Get the beginPoint from the a2dLine usage: Point aPoint = a_line.GetBeginPoint()

Definition at line 437 of file liner.cpp.

a2dPoint2D a2dLine::GetEndPoint ( ) const

Get the endpoint from a a2dLine.

Get the endPoint from the a2dLine usage: Point aPoint = a_line.GetEndPoint()

Definition at line 446 of file liner.cpp.

int a2dLine::Intersect	(	a2dLine &	line,
		a2dPoint2D &	bp,
		a2dPoint2D &	ep,
		double	Marge
	)		const

Intersects two wxLines.

Parameters

line	line to intersect with
bp	beginpoint
ep	endpoint
Marge	within volume at this distance still an intersection

Returns: 0: If there are no crossings 1: If there is one crossing 2: If there are two crossings

Definition at line 451 of file liner.cpp.

bool a2dLine::Intersect	(	a2dLine &	lijn,
		a2dPoint2D &	crossing
	)		const

intersect two (infinit) lines

Intersects two lines if a crossing return true else false

Definition at line 823 of file liner.cpp.

a2dLine & a2dLine::operator= ( const a2dLine & a_line )

makes a a2dLine same as these usage : a2dLine1 = a2dLine2;

Definition at line 59 of file liner.cpp.

OUTPRODUCT a2dLine::OutProduct	(	const a2dLine &	two,
		double	accur
	)		const

outproduct of two wxLines

Return the position of the second a2dLine compared to this a2dLine.

Result = IS_ON | IS_LEFT | IS_RIGHT Here Left and Right is defined as being left or right from the this a2dLine towards the center (common) node direction of vetors taken as begin to endpoint with end of this at begin of a2dLine two

Definition at line 795 of file liner.cpp.

double a2dLine::PointDistance	(	const a2dPoint2D &	p,
		a2dPoint2D *	nearest
	)		const

Calculate the distance of a point from the line. Works even if l==0.

Parameters

p	the point to which the closest point on the line is searched
nearest	if not 0, the closest point to p on the line is assigned to nearest

Definition at line 657 of file liner.cpp.

double a2dLine::PointDistanceOrhto	(	const a2dPoint2D &	p,
		a2dPoint2D *	nearest
	)		const

Calculate the orthogonal distance of a point from the line. Works even if l==0.

Parameters

p	the point to which the closest point on the line is searched
nearest	if not 0, the closest point to p on the line is assigned to nearest

Definition at line 707 of file liner.cpp.

R_PointStatus a2dLine::PointInLine	(	const a2dPoint2D &	a_Point,
		double &	Distance,
		double	Marge
	)		const

For a non-infinite a2dLine.

test if a point lies in the linesegment.

If the point isn't on the a2dLine the function returns a value that indicates on which side of the a2dLine the point is (in linedirection from first point to second point

returns R_LEFT_SIDE, when point lies on the left side of the a2dLine R_RIGHT_SIDE, when point lies on the right side of the a2dLine R_ON_AREA, when point lies on the infinite a2dLine within a range R_IN_AREA, when point lies in the area of the linesegment the returnvalues are declared in (a2dLine.H)

Definition at line 560 of file liner.cpp.

R_PointStatus a2dLine::PointOnLine	(	const a2dPoint2D &	a_Point,
		double &	Distance,
		double	Marge
	)		const

For an infinite a2dLine.

test if a point lies on the a2dLine.

If the point isn't on the a2dLine the function returns a value that indicates on which side of the a2dLine the point is (in linedirection from first point to second point

returns R_LEFT_SIDE, when point lies on the left side of the a2dLine R_ON_AREA, when point lies on the infinite a2dLine within a range R_RIGHT_SIDE, when point lies on the right side of the a2dLine R_LEFT_SIDE , R_RIGHT_SIDE , R_ON_AREA

Definition at line 614 of file liner.cpp.

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

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation