/*
* Copyright 2014 MovingBlocks
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.terasology.utilities.procedural;
/**
* Computes Brownian noise based on some noise generator.
* Originally, Brown integrates white noise, but using other noises can be sometimes useful, too.
*
* @deprecated Use {@link BrownianNoise} instead and adjust the scale factor: the new impl. returns [-1..1].
*/
@Deprecated
public class BrownianNoise2D extends BrownianNoiseOld implements Noise2D {
private final Noise2D other;
/**
* Uses the default number of octaves
*
* @param other the noise to use as a basis
*/
public BrownianNoise2D(Noise2D other) {
this.other = other;
}
/**
* @param octaves the number of octaves to use
*/
public BrownianNoise2D(Noise2D other, int octaves) {
this(other);
setOctaves(octaves);
}
/**
* Returns Fractional Brownian Motion at the given position.
*
* @param x Position on the x-axis
* @param y Position on the y-axis
* @return The noise value in the range [-getScale()..getScale()]
*/
@Override
public float noise(float x, float y) {
float result = 0.0f;
float workingX = x;
float workingY = y;
for (int i = 0; i < getOctaves(); i++) {
result += other.noise(workingX, workingY) * getSpectralWeight(i);
workingX *= getLacunarity();
workingY *= getLacunarity();
}
return result;
}
}