woSource.math

Class Polygon2D

java.lang.Object

woSource.math.Polygon2D

public class Polygon2D
extends java.lang.Object

polygon with coords as float WO 12/17/01

Field Summary

Fields

Modifier and Type	Field and Description
int	npoints
float[]	xpoints
float[]	ypoints

Constructor Summary

Constructors

Constructor and Description
Polygon2D()
Polygon2D(float[] xpts, float[] ypts)
Polygon2D(float[] xpts, float[] ypts, int npts)
Polygon2D(Point2D[] pts)
Polygon2D(Point2D[] pts, int offset)
Polygon2D(Point2D[] pts, int offset, int npts)

Method Summary

Modifier and Type	Method and Description
void	addPoint(float x, float y)
float	area()
Point2D	centroid()
boolean	contains_down(float x, float y) Return true if thinks the given point is inside the polygon checking down.
boolean	contains_downUp(float x, float y, boolean fromDown) Return true if thinks the given point is inside the polygon checking down.
boolean	contains_left(float x, float y)
boolean	contains_right(float x, float y) Return true if thinks the given point is inside the polygon checking right.
boolean	contains_rightLeft(float x, float y, boolean fromRight) Return true if thinks the given point is inside the polygon when checking right.
boolean	contains_up(float x, float y)
boolean	contains(double x, double y)
boolean	contains(float x, float y) 4/23/11 when checking right or up still had problems when > saddle point, so adding check left and up.
boolean	contains(int x, int y)
boolean	contains(Polygon2D testpoly)
boolean[][]	getMask(int width, int height)
void	getTestImg()
float	greatestDiameter()
void	test()
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

npoints

public int npoints

xpoints

public float[] xpoints

ypoints

public float[] ypoints

Constructor Detail

Polygon2D

public Polygon2D()

Polygon2D

public Polygon2D(float[] xpts,
                 float[] ypts)

Polygon2D

public Polygon2D(float[] xpts,
                 float[] ypts,
                 int npts)

Polygon2D

public Polygon2D(Point2D[] pts)

Polygon2D

public Polygon2D(Point2D[] pts,
                 int offset)

Polygon2D

public Polygon2D(Point2D[] pts,
                 int offset,
                 int npts)

Method Detail

test

public void test()

getTestImg

public void getTestImg()

getMask

public boolean[][] getMask(int width,
                           int height)

contains

public boolean contains(int x,
                        int y)

contains

public boolean contains(double x,
                        double y)

contains

public boolean contains(float x,
                        float y)

4/23/11 when checking right or up still had problems when > saddle point,
so adding check left and up.

WO 3/7/2013 discovered an error when have ribbon polygon (snake indentation) that overlaps itself, then the overlapped region which is inside both ribbons is considered to be outside the polygon.

Returns:

true if determined to be inside on both searches.

contains_rightLeft

public boolean contains_rightLeft(float x,
                                  float y,
                                  boolean fromRight)

Return true if thinks the given point is inside the polygon when checking right.

contains_right

public boolean contains_right(float x,
                              float y)

Return true if thinks the given point is inside the polygon checking right.

contains_left

public boolean contains_left(float x,
                             float y)

contains_downUp

public boolean contains_downUp(float x,
                               float y,
                               boolean fromDown)

Return true if thinks the given point is inside the polygon checking down.

contains_down

public boolean contains_down(float x,
                             float y)

Return true if thinks the given point is inside the polygon checking down.

contains_up

public boolean contains_up(float x,
                           float y)

contains

public boolean contains(Polygon2D testpoly)

addPoint

public void addPoint(float x,
                     float y)

centroid

public Point2D centroid()

area

public float area()

greatestDiameter

public float greatestDiameter()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object