a2dVpathArcSegment Class Reference
[vector path a2dCanvasObject plus segment classes]

Arc Segment. More...

#include <polyver.h>

Inheritance diagram for a2dVpathArcSegment:

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Collaboration diagram for a2dVpathArcSegment:

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List of all members.

Public Member Functions
	a2dVpathArcSegment (double x1, double y1, double x2, double y2, a2dPATHSEG type=a2dPATHSEG_ARCTO, a2dPATHSEG_END close=a2dPATHSEG_END_OPEN)
	create arc segment
	a2dVpathArcSegment (const a2dVpathSegment &prev, double xc, double yc, double angle, a2dPATHSEG type=a2dPATHSEG_ARCTO, a2dPATHSEG_END close=a2dPATHSEG_END_OPEN)
	create arc segment
	a2dVpathArcSegment (const a2dVpathSegment &prev, double xc, double yc, double x1, double y1, double x2, double y2, a2dPATHSEG type=a2dPATHSEG_ARCTO, a2dPATHSEG_END close=a2dPATHSEG_END_OPEN)
	create arc segment
	a2dVpathArcSegment (const a2dVpathArcSegment &other)
	constructor
	~a2dVpathArcSegment ()
	destructor
virtual a2dVpathSegment *	Clone ()
	create exact copy
bool	CalcR (const a2dVpathSegment &prev, double &radius, double &center_x, double &center_y, double &beginrad, double &midrad, double &endrad, double &phit)
	Calculation of center for the Arc.
virtual double	Length (const a2dVpathSegment &prev)
	calculate length
Public Attributes
double	m_x2
	second control point
double	m_y2
	second control point

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Detailed Description

Arc Segment.

Create an circular Arc segment. From the previous segment to this segment position, create an arc passing through a thrid point. The Third point defines the Arc segment going clockwise or anticlockwise from begin to end point.

Definition at line 1069 of file polyver.h.

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Constructor & Destructor Documentation

a2dVpathArcSegment::a2dVpathArcSegment	(	double	x1,
		double	y1,
		double	x2,
		double	y2,
		a2dPATHSEG	type = a2dPATHSEG_ARCTO,
		a2dPATHSEG_END	close = a2dPATHSEG_END_OPEN
	)

create arc segment

Begin point of arc is position/endpoint of previous segment

Parameters:

	x1	x of arc endpoint
	y1	y of arc endpoint
	x2	x of arc midpoint
	y2	y of arc midpoint
	type	draw or move towards point
	close	if true close this path with the last move command/segment

Definition at line 3720 of file polyver.cpp.

a2dVpathArcSegment::a2dVpathArcSegment	(	const a2dVpathSegment &	prev,
		double	xc,
		double	yc,
		double	angle,
		a2dPATHSEG	type = a2dPATHSEG_ARCTO,
		a2dPATHSEG_END	close = a2dPATHSEG_END_OPEN
	)

create arc segment

Begin point of arc is position/endpoint of previous segment

Parameters:

	prev	previous segment
	xc	x of arc center
	yc	y of arc center
	angle	angle of arc in degrees relative from the previous segment endpoint (negatif for clockwise)
	type	draw or move towards point
	close	if true close this path with the last move command/segment

Definition at line 3732 of file polyver.cpp.

a2dVpathArcSegment::a2dVpathArcSegment	(	const a2dVpathSegment &	prev,
		double	xc,
		double	yc,
		double	x1,
		double	y1,
		double	x2,
		double	y2,
		a2dPATHSEG	type = a2dPATHSEG_ARCTO,
		a2dPATHSEG_END	close = a2dPATHSEG_END_OPEN
	)

create arc segment

Begin point of arc is position/endpoint of previous segment

Parameters:

	prev	previous segment
	xc	x of arc center
	yc	y of arc center
	x1	x of arc endpoint
	y1	y of arc endpoint
	x2	x (xc,yc) ( x2,y2) define a line which the arc will cross
	y2	y (xc,yc) ( x2,y2) define a line which the arc will cross
	type	draw or move towards point
	close	if true close this path with the last move command/segment

Remarks:

radius is defined by prev segment endpoint and (xc,yc), x1,y1 is adjusted to fit radius.

Definition at line 3753 of file polyver.cpp.

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Member Function Documentation

bool a2dVpathArcSegment::CalcR	(	const a2dVpathSegment &	prev,
		double &	radius,
		double &	center_x,
		double &	center_y,
		double &	beginrad,
		double &	midrad,
		double &	endrad,
		double &	phit
	)

Calculation of center for the Arc.

output :

Parameters:

	prev	the previous segment, to get start point of arc.
	radius	radius of the circle calculated
	center_x	x of the center calculated
	center_y	y of the center calculated
	beginrad	calculated starting angle in radians
	midrad	calculated middle angle in radians
	endrad	calculated end angle in radians
	phit	total calculated in radians (AntiClockwise positif, else negatif )

Returns:

true if the arc is indeed an Arc if a straight line return false.

Definition at line 3803 of file polyver.cpp.

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

• polyver.h
• polyver.cpp