igeo.gui
Class IPolyline2D

java.lang.Object
  igeo.gui.IPolyline2D

public class IPolyline2D
extends java.lang.Object

2D polyline geometry to assist graphic classes of curves and surfaces.

Author:

Satoru Sugihara

Nested Class Summary

static class	IPolyline2D.Intersection
static class	IPolyline2D.XComparator
static class	IPolyline2D.YComparator

Field Summary

boolean	closed
IVec2	max
IVec2	min
IVec2[]	pts

Constructor Summary

IPolyline2D()

IPolyline2D(int num)

IPolyline2D(IPolyline2D pl)

IPolyline2D(IVec2 pt)

IPolyline2D(IVec2[] pts)

IPolyline2D(IVec2 pt1, IVec2 pt2)

Method Summary

void	add(IVec2 pt)
void	append(IPolyline2D l)
void	append(IPolyline2D l, boolean reverseDir)
void	append(IVec2[] pts2)
void	append(IVec2[] pts2, boolean reverseDir)
void	checkBoundary()
void	close()
IPolyline2D	dup()
IVec2	end()
IVec2[]	get()
IVec2	get(int i)
IVec2	getMaxBoundary()
IVec2	getMinBoundary()
static IPolyline2D.Intersection[]	getPairsInsidePolygon(IPolyline2D.Intersection[] pts, IVec2[] polygon, boolean xOrY)
int	indexOf(IVec2 pt)
void	insert(int idx, IVec2 pt)
IVec2[]	intersect(IPolyline2D line)
IPolyline2D.Intersection[]	intersectPolylineAndXLine(boolean inside, double y) gets intersection point with IPolyline2D instance and adjacent points
IPolyline2D.Intersection[]	intersectPolylineAndYLine(boolean inside, double x) gets intersection point with IPolyline2D instance and adjacent points
static IVec2I	intersectXEdgeAndXLine(IVec2I pt1, IVec2I pt2, IVec2I pt3, IVec2I pt4, IVec2I intersectPt, boolean normalDir, boolean inside) when pt2 and pt3 are on X line, get a point which is inside/outisde intersection pt1 and pt4 can be null
static IVec2I	intersectYEdgeAndYLine(IVec2I pt1, IVec2I pt2, IVec2I pt3, IVec2I pt4, IVec2I intersectPt, boolean normalDir, boolean inside) when pt2 and pt3 are on y line, get a point which is inside/outisde intersection pt1 and pt4 can be null
boolean	isClosed()
boolean	isNormalPositive()
static boolean	isNormalPositive(IVec2I[] pts, boolean close) checking if the direction of closed polygon normal is positive towards z direction or not direction follows right screw law.
static IPolyline2D	join(IPolyline2D[] lines, boolean close) join polylines without checking end points but removing end point of each line replaced with next start point
int	num()
void	open()
void	removeDuplicatedPoints()
void	removeStraightPoints()
void	reverse()
void	set(int i, IVec2 pt)
void	set(int i, IVec2I pt)
IVec2	start()
static double	sumOfExteriorAngles(IVec2I[] pts, boolean close)
java.lang.String	toString()
static IPolyline2D[]	xLineInside(double y, IPolyline2D[] outlines, IPolyline2D[] holes)
static IPolyline2D[]	yLineInside(double x, IPolyline2D[] outlines, IPolyline2D[] holes)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

pts

public IVec2[] pts

closed

public boolean closed

min

public IVec2 min

max

public IVec2 max

Constructor Detail

IPolyline2D

public IPolyline2D()

IPolyline2D

public IPolyline2D(int num)

IPolyline2D

public IPolyline2D(IVec2[] pts)

IPolyline2D

public IPolyline2D(IVec2 pt1,
                   IVec2 pt2)

IPolyline2D

public IPolyline2D(IVec2 pt)

IPolyline2D

public IPolyline2D(IPolyline2D pl)

Method Detail

dup

public IPolyline2D dup()

num

public int num()

get

public IVec2 get(int i)

start

public IVec2 start()

end

public IVec2 end()

get

public IVec2[] get()

set

public void set(int i,
                IVec2I pt)

set

public void set(int i,
                IVec2 pt)

indexOf

public int indexOf(IVec2 pt)

checkBoundary

public void checkBoundary()

getMinBoundary

public IVec2 getMinBoundary()

getMaxBoundary

public IVec2 getMaxBoundary()

isClosed

public boolean isClosed()

close

public void close()

open

public void open()

add

public void add(IVec2 pt)

insert

public void insert(int idx,
                   IVec2 pt)

append

public void append(IPolyline2D l)

append

public void append(IPolyline2D l,
                   boolean reverseDir)

append

public void append(IVec2[] pts2)

append

public void append(IVec2[] pts2,
                   boolean reverseDir)

reverse

public void reverse()

join

public static IPolyline2D join(IPolyline2D[] lines,
                               boolean close)

join polylines without checking end points but removing end point of each line replaced with next start point

intersect

public IVec2[] intersect(IPolyline2D line)

removeStraightPoints

public void removeStraightPoints()

removeDuplicatedPoints

public void removeDuplicatedPoints()

getPairsInsidePolygon

public static IPolyline2D.Intersection[] getPairsInsidePolygon(IPolyline2D.Intersection[] pts,
                                                               IVec2[] polygon,
                                                               boolean xOrY)

yLineInside

public static IPolyline2D[] yLineInside(double x,
                                        IPolyline2D[] outlines,
                                        IPolyline2D[] holes)

xLineInside

public static IPolyline2D[] xLineInside(double y,
                                        IPolyline2D[] outlines,
                                        IPolyline2D[] holes)

intersectXEdgeAndXLine

public static IVec2I intersectXEdgeAndXLine(IVec2I pt1,
                                            IVec2I pt2,
                                            IVec2I pt3,
                                            IVec2I pt4,
                                            IVec2I intersectPt,
                                            boolean normalDir,
                                            boolean inside)

when pt2 and pt3 are on X line, get a point which is inside/outisde intersection pt1 and pt4 can be null

Parameters:

pt1 - first point of polyline

pt2 - second point of polyline; pt2 and pt3 are both on the same x

pt3 - third point of polyline; pt2 and pt3 are both on the same x

pt4 - fourth point of polyline

intersectPt - intersecting point between pt2 and pt3

normalDir - direction of closing polygon if it's turning right screw direction or not

inside - getting inner or outer intersection point depending on normalDir

intersectYEdgeAndYLine

public static IVec2I intersectYEdgeAndYLine(IVec2I pt1,
                                            IVec2I pt2,
                                            IVec2I pt3,
                                            IVec2I pt4,
                                            IVec2I intersectPt,
                                            boolean normalDir,
                                            boolean inside)

when pt2 and pt3 are on y line, get a point which is inside/outisde intersection pt1 and pt4 can be null

Parameters:

pt1 - first point of polyline

pt2 - second point of polyline; pt2 and pt3 are both on the same y

pt3 - third point of polyline; pt2 and pt3 are both on the same y

pt4 - fourth point of polyline

intersectPt - intersecting point between pt2 and pt3

normalDir - direction of closing polygon if it's turning right screw direction or not

inside - getting inner or outer intersection point depending on normalDir

intersectPolylineAndXLine

public IPolyline2D.Intersection[] intersectPolylineAndXLine(boolean inside,
                                                            double y)

gets intersection point with IPolyline2D instance and adjacent points

intersectPolylineAndYLine

public IPolyline2D.Intersection[] intersectPolylineAndYLine(boolean inside,
                                                            double x)

gets intersection point with IPolyline2D instance and adjacent points

sumOfExteriorAngles

public static double sumOfExteriorAngles(IVec2I[] pts,
                                         boolean close)

isNormalPositive

public static boolean isNormalPositive(IVec2I[] pts,
                                       boolean close)

checking if the direction of closed polygon normal is positive towards z direction or not direction follows right screw law.

isNormalPositive

public boolean isNormalPositive()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object