/*
* 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.core.world.generator.facets.World2dPreviewFacet;
import org.terasology.math.TeraMath;
import org.terasology.rendering.nui.Color;
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.SeaLevelFacet;
import org.terasology.world.generation.facets.SurfaceHeightFacet;
@Produces(World2dPreviewFacet.class)
@Requires({@Facet(SurfaceHeightFacet.class), @Facet(SeaLevelFacet.class)})
public class World2dPreviewProvider implements FacetProvider {
static int maxSamplesPerRegion = 4;
static int maxDepthDescribed = 64;
static int maxHeightDescribed = 100;
@Override
public void setSeed(long seed) {
}
@Override
public void process(GeneratingRegion region) {
World2dPreviewFacet facet = new World2dPreviewFacet();
SurfaceHeightFacet surfaceFacet = region.getRegionFacet(SurfaceHeightFacet.class);
SeaLevelFacet seaLevelFacet = region.getRegionFacet(SeaLevelFacet.class);
float seaLevel = seaLevelFacet.getSeaLevel();
float[] values = surfaceFacet.getInternal();
float total = 0;
// averaging every single value takes too much time, only use some of the values in our average
int sampleRate = Math.max(1, region.getRegion().sizeX() / maxSamplesPerRegion);
for (int i = 0; i < values.length; i++) {
if (i % sampleRate == 0) {
total += values[i];
}
}
float average = total / (values.length / sampleRate);
if (average < seaLevel) {
// start with blue and make closer to black the deeper we go
facet.setColor(new Color(0, 0, TeraMath.clamp((int) (255 * (1.0 - (Math.abs(average - seaLevel) / maxDepthDescribed))), 100, 255)));
} else {
// start with green make closer to black the higher we go
facet.setColor(new Color(0, TeraMath.clamp((int) (255 * (1.0 - ((average - seaLevel) / maxHeightDescribed))), 100, 255), 0));
}
region.setRegionFacet(World2dPreviewFacet.class, facet);
}
}