Package org.oscim.utils.geom

Class LineClipper

java.lang.Object

org.oscim.utils.geom.LineClipper

public class LineClipper
extends Object

from http://en.wikipedia.org/wiki/Cohen%E2%80%93 Sutherland_algorithm

Field Summary

Fields

Modifier and Type	Field	Description
static final int	BOTTOM
static final int	INSIDE
static final int	INTERSECTION
static final int	LEFT
static final int	OUTSIDE
float	outX1
float	outX2
float	outY1
float	outY2
static final int	RIGHT
static final int	TOP

Constructor Summary

Constructors

Constructor	Description
LineClipper(float minx, float miny, float maxx, float maxy)

Method Summary

Modifier and Type	Method	Description
int	clipLine(GeometryBuffer in, GeometryBuffer out)
int	clipNext(float x1, float y1)
int	clipSegment(float x1, float y1, float x2, float y2)
boolean	clipStart(float x0, float y0)
float[]	getLine(float[] out, int offset)
int	getPrevOutcode()
int	outcode(float x, float y)
void	setRect(float minx, float miny, float maxx, float maxy)

Methods inherited from class java.lang.Object

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

Field Details

INSIDE

public static final int INSIDE

See Also:

• Constant Field Values

LEFT

public static final int LEFT

See Also:

• Constant Field Values

RIGHT

public static final int RIGHT

See Also:

• Constant Field Values

BOTTOM

public static final int BOTTOM

See Also:

• Constant Field Values

TOP

public static final int TOP

See Also:

• Constant Field Values

OUTSIDE

public static final int OUTSIDE

See Also:

• Constant Field Values

INTERSECTION

public static final int INTERSECTION

See Also:

• Constant Field Values

outX1

public float outX1

outY1

public float outY1

outX2

public float outX2

outY2

public float outY2

Constructor Details

LineClipper

public LineClipper(float minx,
 float miny,
 float maxx,
 float maxy)

Method Details

setRect

public void setRect(float minx,
 float miny,
 float maxx,
 float maxy)

clipStart

public boolean clipStart(float x0,
 float y0)

outcode

public int outcode(float x,
 float y)

clipNext

public int clipNext(float x1,
 float y1)

Returns:

OUTSIDE (= 1111) if not intersection, INSIDE (= 0) if fully within, INTERSECTION (= -1) if clipped (and 'out' set to new points)

clipSegment

public int clipSegment(float x1,
 float y1,
 float x2,
 float y2)

getLine

public float[] getLine(float[] out,
 int offset)

getPrevOutcode

public int getPrevOutcode()

clipLine

public int clipLine(GeometryBuffer in,
 GeometryBuffer out)