org.oscim.utils.geom

Class LineClipper

java.lang.Object

org.oscim.utils.geom.LineClipper

public class LineClipper
extends java.lang.Object

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

Field Summary

Fields

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

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and 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 Detail

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

outX1

public float outX1

outY1

public float outY1

outX2

public float outX2

outY2

public float outY2

Constructor Detail

LineClipper

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

Method Detail

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:

0 if not intersection, 1 fully within, -1 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)