uk.ac.starlink.ttools.plot2.layer

Class FillPixer

java.lang.Object

uk.ac.starlink.ttools.plot2.layer.FillPixer

All Implemented Interfaces:

Pixer

public class FillPixer
extends Object
implements Pixer

Pixer that iterates over all points inside a polygon. Should handle all polygons (convex, concave, re-entrant). I think(?) the algorithm is about as efficient as it's going to get for a single-threaded implementation. Memory consumption is low.

Since:

6 Oct 2021

Author:

Mark Taylor

See Also:

https://alienryderflex.com/polygon_fill/

Constructor Summary

Constructors

Constructor and Description
FillPixer(int[] xs, int[] ys, int np, Rectangle bounds) Constructor.

Method Summary

Modifier and Type	Method and Description
int	getX() Returns the X coordinate of the current point.
int	getY() Returns the Y coordinate of the current point.
boolean	next() Advances to the next point to be dispensed by this iterator.

Methods inherited from class java.lang.Object

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

Constructor Detail

FillPixer

public FillPixer(int[] xs,
                 int[] ys,
                 int np,
                 Rectangle bounds)

Constructor.

Parameters:

xs - np-element array giving graphics X vertex coordinates

ys - np-element array giving graphics Y vertex coordinates

np - number of vertices

bounds - actual bounds within which pixels are required, or null for all pixels

Method Detail

next

public boolean next()

Description copied from interface: Pixer

Advances to the next point to be dispensed by this iterator. Must be called before any calls to getX/getY.

Specified by:

next in interface Pixer

Returns:

true iff there is another point

getX

public int getX()

Description copied from interface: Pixer

Returns the X coordinate of the current point.

Specified by:

getX in interface Pixer

Returns:

X coordinate

getY

public int getY()

Description copied from interface: Pixer

Returns the Y coordinate of the current point.

Specified by:

getY in interface Pixer

Returns:

Y coordinate