/**
* 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.simplearray;
import java.nio.ByteBuffer;
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 SimpleArrayTextureSource implements TextureSource {
private final int tileSize;
private final byte[] colorData;
private final int size;
private final int availableClipmapLevels = 8;
public SimpleArrayTextureSource(final int tileSize, final byte[] colorData, final int size) {
this.tileSize = tileSize;
this.colorData = colorData;
this.size = size;
}
@Override
public TextureConfiguration getConfiguration() throws Exception {
final Map<Integer, TextureStoreFormat> textureStoreFormat = Maps.newHashMap();
textureStoreFormat.put(0, TextureStoreFormat.RGBA8);
return new TextureConfiguration(availableClipmapLevels, textureStoreFormat, tileSize, 1f, true, true);
}
@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 levelSize = 1 << availableClipmapLevels - 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 * levelSize <= size && yy >= 0 && yy * tileSize * levelSize <= size) {
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 int baseClipmapLevel = availableClipmapLevels - clipmapLevel - 1;
final int levelSize = 1 << baseClipmapLevel;
final ByteBuffer data = BufferUtils.createByteBufferOnHeap(tileSize * tileSize * 4);
for (int y = 0; y < tileSize; y++) {
for (int x = 0; x < tileSize; x++) {
final int heightX = (tileX * tileSize + x) * levelSize;
final int heightY = (tileY * tileSize + y) * levelSize;
final int indexTile = (y * tileSize + x) * 4;
final int index = heightY * size + heightX;
if (heightX < 0 || heightX >= size || heightY < 0 || heightY >= size) {
data.put(indexTile + 0, (byte) 0);
data.put(indexTile + 1, (byte) 0);
data.put(indexTile + 2, (byte) 0);
data.put(indexTile + 3, (byte) 0);
} else {
data.put(indexTile + 0, colorData[index * 4 + 0]);
data.put(indexTile + 1, colorData[index * 4 + 1]);
data.put(indexTile + 2, colorData[index * 4 + 2]);
data.put(indexTile + 3, colorData[index * 4 + 3]);
}
}
}
return data;
}
}