/*
* 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.Rect2i;
import org.terasology.math.Region3i;
import org.terasology.math.Vector2i;
import org.terasology.world.generation.Facet;
import org.terasology.world.generation.FacetProvider;
import org.terasology.world.generation.GeneratingRegion;
import org.terasology.world.generation.Produces;
import org.terasology.world.generation.Requires;
import org.terasology.world.generation.facets.DensityFacet;
import org.terasology.world.generation.facets.SurfaceHeightFacet;
/**
* Sets density based on its distance from the surface
*/
@Requires(@Facet(SurfaceHeightFacet.class))
@Produces(DensityFacet.class)
public class SurfaceToDensityProvider implements FacetProvider {
@Override
public void setSeed(long seed) {
}
@Override
public void process(GeneratingRegion region) {
SurfaceHeightFacet surfaceHeight = region.getRegionFacet(SurfaceHeightFacet.class);
DensityFacet facet = new DensityFacet(region.getRegion(), region.getBorderForFacet(DensityFacet.class));
Region3i area = region.getRegion();
Rect2i rect = Rect2i.createFromMinAndMax(facet.getRelativeRegion().minX(), facet.getRelativeRegion().minZ(),
facet.getRelativeRegion().maxX(), facet.getRelativeRegion().maxZ());
for (Vector2i pos : rect) {
float height = surfaceHeight.get(pos);
for (int y = facet.getRelativeRegion().minY(); y <= facet.getRelativeRegion().maxY(); ++y) {
facet.set(pos.x, y, pos.y, height - area.minY() - y);
}
}
region.setRegionFacet(DensityFacet.class, facet);
}
}