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* Copyright (c) 2015
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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*******************************************************************************/
package jsettlers.mapcreator.noise;
/**
* Used to draw some random shapes
*
* @author Andreas Butti
*/
public class NoiseGenerator {
private static final float PERSISTENCE = .5f;
private static final float FREQ_INCREASE = 2;
private final NoiseSet[] SETS = new NoiseSet[] {
new NoiseSet(15731, 789221, 1376312589),
new NoiseSet(15731, 789221, 2350883)
};
/**
* Get noise value for Position
*
* @param x
* X Pos
* @param y
* Y Pos
* @return Noise value
*/
public float getNoise(int x, int y) {
return getRealNoise(x * .3f, y * .3f);
}
private float getRealNoise(float x, float y) {
float sum = 0;
float amplitude = 1;
float frequency = 1;
for (int i = 0; i < SETS.length; i++) {
sum += SETS[i].getInterpolated(x * frequency, y * frequency) * amplitude;
frequency *= FREQ_INCREASE;
amplitude *= PERSISTENCE;
}
return sum;
}
}