/**
* 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.array;
import java.nio.ByteBuffer;
import java.util.List;
import java.util.Map;
import java.util.Set;
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.util.geom.BufferUtils;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;
public class ArrayTextureSource implements TextureSource {
private final int tileSize;
private final List<float[]> heightMaps;
private final List<Integer> heightMapSizes;
private final ThreadLocal<ByteBuffer> tileDataPool = new ThreadLocal<ByteBuffer>() {
@Override
protected ByteBuffer initialValue() {
return BufferUtils.createByteBufferOnHeap(tileSize * tileSize);
}
};
public ArrayTextureSource(final int tileSize, final List<float[]> heightMaps, final List<Integer> heightMapSizes) {
this.tileSize = tileSize;
this.heightMaps = heightMaps;
this.heightMapSizes = heightMapSizes;
}
@Override
public TextureConfiguration getConfiguration() throws Exception {
final Map<Integer, TextureStoreFormat> textureStoreFormat = Maps.newHashMap();
textureStoreFormat.put(0, TextureStoreFormat.Luminance8);
return new TextureConfiguration(heightMaps.size(), textureStoreFormat, tileSize, 1f, true, false);
}
@Override
public Set<Tile> getValidTiles(final int clipmapLevel, final int tileX, final int tileY, final int numTilesX,
final int numTilesY) throws Exception {
final Set<Tile> validTiles = Sets.newHashSet();
final int heightMapSize = heightMapSizes.get(clipmapLevel);
for (int y = 0; y < numTilesY; y++) {
for (int x = 0; x < numTilesX; x++) {
final int xx = tileX + x;
final int yy = tileY + y;
if (xx >= 0 && xx * tileSize <= heightMapSize && yy >= 0 && yy * tileSize <= heightMapSize) {
final Tile tile = new Tile(xx, yy);
validTiles.add(tile);
}
}
}
return validTiles;
}
@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 int tileX = tile.getX();
final int tileY = tile.getY();
final float[] heightMap = heightMaps.get(clipmapLevel);
final int heightMapSize = heightMapSizes.get(clipmapLevel);
final ByteBuffer data = tileDataPool.get();
for (int y = 0; y < tileSize; y++) {
for (int x = 0; x < tileSize; x++) {
final int index = (x + y * tileSize) * 1;
final int heightX = tileX * tileSize + x;
final int heightY = tileY * tileSize + y;
final float height = getHeight(heightMap, heightMapSize, heightX, heightY);
final byte byteHeight = (byte) (height * 255 * 3);
data.put(index, byteHeight);
}
}
return data;
}
private float getHeight(final float[] heightMap, final int heightMapSize, final int x, final int y) {
if (x < 0 || x >= heightMapSize || y < 0 || y >= heightMapSize) {
return 0;
}
return heightMap[y * heightMapSize + x];
}
}