/*
* 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.core.world.generator.facetProviders;
import org.terasology.math.TeraMath;
import org.terasology.utilities.procedural.BrownianNoise3D;
import org.terasology.utilities.procedural.Noise3DTo2DAdapter;
import org.terasology.utilities.procedural.PerlinNoise;
import org.terasology.utilities.procedural.SubSampledNoise2D;
import org.terasology.world.generation.Border3D;
import org.terasology.world.generation.FacetProvider;
import org.terasology.world.generation.GeneratingRegion;
import org.terasology.world.generation.Produces;
import org.terasology.world.generation.facets.SurfaceHumidityFacet;
import javax.vecmath.Vector2f;
/**
* @author Immortius
*/
@Produces(SurfaceHumidityFacet.class)
public class PerlinHumidityProvider implements FacetProvider {
private static final int SAMPLE_RATE = 4;
private SubSampledNoise2D humidityNoise;
@Override
public void setSeed(long seed) {
humidityNoise = new SubSampledNoise2D(new Noise3DTo2DAdapter(new BrownianNoise3D(new PerlinNoise(seed + 6), 8)), new Vector2f(0.0005f, 0.0005f), SAMPLE_RATE);
}
@Override
public void process(GeneratingRegion region) {
Border3D border = region.getBorderForFacet(SurfaceHumidityFacet.class);
SurfaceHumidityFacet facet = new SurfaceHumidityFacet(region.getRegion(), border);
float[] noise = humidityNoise.noise(facet.getWorldRegion());
for (int i = 0; i < noise.length; ++i) {
noise[i] = TeraMath.clamp((noise[i] + 1f) * 0.5f);
}
facet.set(noise);
region.setRegionFacet(SurfaceHumidityFacet.class, facet);
}
}