a2dVertexArray Class Reference

vertex array of line and arc segments. More...

#include <polyver.h>

List of all members.

Public Member Functions
	a2dVertexArray ()
	constructor
	a2dVertexArray (const a2dVertexArray &other)
	constructor
	a2dVertexArray (const a2dVertexList &other)
	~a2dVertexArray ()
	destructor
a2dVertexArray &	operator= (const a2dVertexArray &other)
	operator =
a2dVertexArray &	operator= (const a2dVertexList &other)
a2dLineSegmentPtr	GetPreviousAround (wxUint32 index) const
	get the previous segment as a polygon ( GetLast() is no previous )
a2dLineSegmentPtr	GetNextAround (wxUint32 index) const
	get the next segment as a polygon ( GetFirst() is no next )
a2dLineSegmentPtr	Item (wxUint32 index)
a2dLineSegmentPtr	Item (wxUint32 index) const
void	RemoveAt (size_t index)
void	Insert (a2dLineSegment *segment, size_t index)
double	Length () const
	calculate length of path
void	AddPoint (const a2dPoint2D &point, bool atEnd=true)
	add point to end or begin
void	AddPoint (double x, double y, bool atEnd=true)
	add point to end or begin
void	SetPointAdjustArcs (unsigned int n, double x, double y, bool polygon)
	sets a point of a segment and adjusts arc it midpoints.
void	SetPointAdjustArcs (a2dLineSegmentPtr seg, double x, double y, bool polygon)
	sets a point of a segment and adjusts arc it midpoints.
double	CalcArea () const
void	ConvertToLines (double aberation=0)
	Convert complex segments to line segments.
void	Transform (const a2dAffineMatrix &world)
	transform all segments with given matrix
bool	HasArcs () const
	return true if there are a2dArcSegment segments.
a2dBoundingBox	GetBbox (const a2dAffineMatrix &lworld=a2dIDENTITY_MATRIX)
	return a boundingbox of a transformed vertexarray
a2dVertexArray *	Contour (double distance, a2dPATH_END_TYPE pathtype)
	create a contour around polygon/polyline
a2dVertexArray *	ConvertSplinedPolygon (double Aber) const
	Spline conversion for polygon.
a2dVertexArray *	ConvertSplinedPolyline (double Aber) const
	Spline conversion for polyline.
a2dVpath *	ConvertToVpath (bool arc, bool closed=false)
	return converted vector Vpath, arc segments stay intact if arc is true
a2dHit	HitTestPolygon (const a2dPoint2D &ptest, double margin)
	extensive hittesting on vertex list seen as polygon.
a2dHit	HitTestPolyline (const a2dPoint2D &ptest, double margin)
	extensive hittesting on vertex list seen as polyline.
bool	RemoveRedundant (bool polygon)
	line segments ( not arcs ) with same point are removed
a2dVertexList *	GetRedundant (bool polygon, double smallest=0)
	line segments ( not arcs ) with same point are returned

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Detailed Description

vertex array of line and arc segments.

Holds a wxArray of a2dLineSegment objects. Drawing the sequence of segments, represents the form of the shape. Shape depends on the type of segment and style of that segment. There are two type, straight line segments and arc segments

Definition at line 489 of file polyver.h.

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Member Function Documentation

double a2dVertexArray::CalcArea

(

)

const

calculate the area of simple polygons (not selfintersecting) coordinates may be negatif

Definition at line 778 of file polyver.cpp.

void a2dVertexArray::Transform

(

const a2dAffineMatrix &

world

)

transform all segments with given matrix

Remarks:

complex segments will be broken down to lines.

Definition at line 820 of file polyver.cpp.

a2dHit a2dVertexArray::HitTestPolygon	(	const a2dPoint2D &	ptest,
		double	margin
	)

extensive hittesting on vertex list seen as polygon.

Parameters:

	ptest	point to test against polygon.
	margin	point with this margin around.

This function checks if a point is inside, outside or on the stroke of a polygon. This is done intersecting a vertical line through the test point with every edge of the polygon. Then the number of intersections above (y+) of the test point is counted +1 for left to right and -1 for right to left lines. There is an almost identical function for point list polygons. These functions should be kept identical except of the first two lines the handle lists or arrays.

Definition at line 1250 of file polyver.cpp.

a2dHit a2dVertexArray::HitTestPolyline	(	const a2dPoint2D &	ptest,
		double	margin
	)

extensive hittesting on vertex list seen as polyline.

Parameters:

	ptest	point to test against polyline.
	margin	point with this margin around.

Definition at line 1449 of file polyver.cpp.

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

• polyver.h
• polyver.cpp