/*
* Tiled Map Editor, (c) 2004-2006
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any later
* version.
*
* Adam Turk <aturk@biggeruniverse.com> Bjorn Lindeijer <bjorn@lindeijer.nl>
*/
package de.yaams.extensions.basemap.tiled.mapeditor.brush;
import java.awt.Rectangle;
import java.awt.geom.Area;
import de.yaams.extensions.basemap.tiled.core.TileLayer;
import de.yaams.extensions.basemap.tiled.util.MersenneTwister;
/**
* @version $Id$
*/
public class RandomBrush extends ShapeBrush {
private final MersenneTwister mt;
private double ratio = 0.5;
public RandomBrush(Area shape) {
super(shape);
mt = new MersenneTwister(System.currentTimeMillis());
}
public RandomBrush(AbstractBrush sb) {
super(sb);
mt = new MersenneTwister(System.currentTimeMillis());
if (sb instanceof RandomBrush) {
ratio = ((RandomBrush) sb).ratio;
}
}
public void setRatio(double r) {
ratio = r;
}
public double getRatio() {
return ratio;
}
/**
* Uses the MersenneTwister to fill in a random amount of the area of the
* brush. Uses the formula: x % 101 <= 100*ratio where, 'x' is a random
* number, to determine if a specific tile should be painted or not
*
* @see ShapeBrush#doPaint
* @return a Rectangle of the bounds of the area that was modified
* @param x
* The x-coordinate where the click occurred.
* @param y
* The y-coordinate where the click occurred.
*/
@Override
public Rectangle doPaint(int x, int y) {
Rectangle shapeBounds = shape.getBounds();
int centerx = x - shapeBounds.width / 2;
int centery = y - shapeBounds.height / 2;
for (int i = 0; i < numLayers; i++) {
TileLayer tl = (TileLayer) affectedMp.getLayer(initLayer - i);
if (tl != null) {
for (int cy = 0; cy <= shapeBounds.height; cy++) {
for (int cx = 0; cx < shapeBounds.width; cx++) {
if (shape.contains(cx, cy) && mt.genrand() % 101 <= 100 * ratio) {
tl.setTileAt(cx + centerx, cy + centery, paintTile);
}
}
}
}
}
return new Rectangle(centerx, centery, shapeBounds.width, shapeBounds.height);
}
}