/* Copyright (C) 2011 Garrett Fleenor
This library is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3.0 of the License, or (at
your option) any later version.
This library is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License (COPYING.txt) for more details.
You should have received a copy of the GNU Lesser General Public License
along with this library; if not, write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
This is a port of libnoise ( http://libnoise.sourceforge.net/index.html ). Original implementation by Jason Bevins
*/
package net.royawesome.jlibnoise.module;
import net.royawesome.jlibnoise.exception.NoModuleException;
public class Cache extends Module {
/// The cached output value at the cached input value.
double cachedValue;
/// Determines if a cached output value is stored in this noise
/// module.
boolean isCached = false;
// @a x coordinate of the cached input value.
double xCache;
/// @a y coordinate of the cached input value.
double yCache;
/// @a z coordinate of the cached input value.
double zCache;
public Cache() {
super(1);
}
@Override
public int GetSourceModuleCount() {
return 1;
}
@Override
public void SetSourceModule(int index, Module sourceModule) {
super.SetSourceModule(index, sourceModule);
isCached = false;
}
@Override
public double GetValue(double x, double y, double z) {
if (SourceModule[0] == null)
throw new NoModuleException();
if (!(isCached && x == xCache && y == yCache && z == zCache)) {
cachedValue = SourceModule[0].GetValue(x, y, z);
xCache = x;
yCache = y;
zCache = z;
}
isCached = true;
return cachedValue;
}
}