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jMonkeyEngine is a 3-D game engine for adventurous Java developers
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/*
 * Copyright (c) 2009-2020 jMonkeyEngine
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
 *   may be used to endorse or promote products derived from this software
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.jme3.terrain.geomipmap.grid;


import com.jme3.export.JmeExporter;
import com.jme3.export.JmeImporter;
import com.jme3.math.Vector3f;
import com.jme3.terrain.geomipmap.TerrainGridTileLoader;
import com.jme3.terrain.geomipmap.TerrainQuad;
import com.jme3.terrain.heightmap.AbstractHeightMap;
import com.jme3.terrain.heightmap.HeightMap;
import com.jme3.terrain.noise.Basis;
import java.io.IOException;
import java.nio.FloatBuffer;

/**
 *
 * @author Anthyon, normenhansen
 */
public class FractalTileLoader implements TerrainGridTileLoader{
            
    public class FloatBufferHeightMap extends AbstractHeightMap {

        private final FloatBuffer buffer;

        public FloatBufferHeightMap(FloatBuffer buffer) {
            this.buffer = buffer;
        }

        @Override
        public boolean load() {
            this.heightData = this.buffer.array();
            return true;
        }

    }

    private int patchSize;
    private int quadSize;
    private final Basis base;
    private final float heightScale;

    public FractalTileLoader(Basis base, float heightScale) {
        this.base = base;
        this.heightScale = heightScale;
    }

    private HeightMap getHeightMapAt(Vector3f location) {
        AbstractHeightMap heightmap = null;
        
        FloatBuffer buffer = this.base.getBuffer(location.x * (this.quadSize - 1), location.z * (this.quadSize - 1), 0, this.quadSize);

        float[] arr = buffer.array();
        for (int i = 0; i < arr.length; i++) {
            arr[i] = arr[i] * this.heightScale;
        }
        heightmap = new FloatBufferHeightMap(buffer);
        heightmap.load();
        return heightmap;
    }

    @Override
    public TerrainQuad getTerrainQuadAt(Vector3f location) {
        HeightMap heightMapAt = getHeightMapAt(location);
        TerrainQuad q = new TerrainQuad("Quad" + location, patchSize, quadSize, heightMapAt == null ? null : heightMapAt.getHeightMap());
        return q;
    }

    @Override
    public void setPatchSize(int patchSize) {
        this.patchSize = patchSize;
    }

    @Override
    public void setQuadSize(int quadSize) {
        this.quadSize = quadSize;
    }

    @Override
    public void write(JmeExporter ex) throws IOException {
        //TODO: serialization
    }

    @Override
    public void read(JmeImporter im) throws IOException {
        //TODO: serialization
    }    
}