/**
* Copyright (c) 2008-2012 Ardor Labs, Inc.
*
* This file is part of Ardor3D.
*
* Ardor3D is free software: you can redistribute it and/or modify it
* under the terms of its license which may be found in the accompanying
* LICENSE file or at <http://www.ardor3d.com/LICENSE>.
*/
package com.ardor3d.extension.terrain.providers.procedural;
import java.nio.ByteBuffer;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.locks.ReentrantLock;
import com.ardor3d.extension.terrain.client.TextureConfiguration;
import com.ardor3d.extension.terrain.client.TextureSource;
import com.ardor3d.extension.terrain.util.Tile;
import com.ardor3d.image.TextureStoreFormat;
import com.ardor3d.image.util.GeneratedImageFactory;
import com.ardor3d.math.ColorRGBA;
import com.ardor3d.math.functions.Function3D;
import com.ardor3d.math.type.ReadOnlyColorRGBA;
import com.ardor3d.util.geom.BufferUtils;
import com.google.common.collect.Maps;
public class ProceduralTextureSource implements TextureSource {
private final Function3D function;
private static final int tileSize = 128;
private static final int availableClipmapLevels = 8;
private final ReadOnlyColorRGBA[] terrainColors;
private final ReentrantLock textureLock = new ReentrantLock();
private final ThreadLocal<ByteBuffer> tileDataPool = new ThreadLocal<ByteBuffer>() {
@Override
protected ByteBuffer initialValue() {
return BufferUtils.createByteBufferOnHeap(tileSize * tileSize * 3);
}
};
public ProceduralTextureSource(final Function3D function) {
this.function = function;
terrainColors = new ReadOnlyColorRGBA[256];
terrainColors[0] = new ColorRGBA(0, 0, .5f, 1);
terrainColors[95] = new ColorRGBA(0, 0, 1, 1);
terrainColors[127] = new ColorRGBA(0, .5f, 1, 1);
terrainColors[137] = new ColorRGBA(240 / 255f, 240 / 255f, 64 / 255f, 1);
terrainColors[143] = new ColorRGBA(32 / 255f, 160 / 255f, 0, 1);
terrainColors[175] = new ColorRGBA(224 / 255f, 224 / 255f, 0, 1);
terrainColors[223] = new ColorRGBA(128 / 255f, 128 / 255f, 128 / 255f, 1);
terrainColors[255] = ColorRGBA.WHITE;
GeneratedImageFactory.fillInColorTable(terrainColors);
}
@Override
public TextureConfiguration getConfiguration() throws Exception {
final Map<Integer, TextureStoreFormat> textureStoreFormat = Maps.newHashMap();
textureStoreFormat.put(0, TextureStoreFormat.RGB8);
return new TextureConfiguration(availableClipmapLevels, textureStoreFormat, tileSize, 1f, false, false);
}
@Override
public Set<Tile> getValidTiles(final int clipmapLevel, final int tileX, final int tileY, final int numTilesX,
final int numTilesY) throws Exception {
return null;
}
@Override
public Set<Tile> getInvalidTiles(final int clipmapLevel, final int tileX, final int tileY, final int numTilesX,
final int numTilesY) throws Exception {
return null;
}
@Override
public int getContributorId(final int clipmapLevel, final Tile tile) {
return 0;
}
@Override
public ByteBuffer getTile(final int clipmapLevel, final Tile tile) throws Exception {
final ByteBuffer data = tileDataPool.get();
final int tileX = tile.getX();
final int tileY = tile.getY();
final int baseClipmapLevel = availableClipmapLevels - clipmapLevel - 1;
textureLock.lock();
try {
for (int y = 0; y < tileSize; y++) {
for (int x = 0; x < tileSize; x++) {
if (Thread.interrupted()) {
return null;
}
final int heightX = tileX * tileSize + x;
final int heightY = tileY * tileSize + y;
final double eval = function.eval(heightX << baseClipmapLevel, heightY << baseClipmapLevel, 0) * 0.4167f + 0.5f;
final byte colIndex = (byte) (eval * 255);
final ReadOnlyColorRGBA c = terrainColors[colIndex & 0xFF];
final int index = (x + y * tileSize) * 3;
data.put(index, (byte) (c.getRed() * 255));
data.put(index + 1, (byte) (c.getGreen() * 255));
data.put(index + 2, (byte) (c.getBlue() * 255));
}
}
} finally {
textureLock.unlock();
}
return data;
}
}