1/*
2 * Copyright (c) 2009-2010 jMonkeyEngine
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 * * Redistributions of source code must retain the above copyright
10 *   notice, this list of conditions and the following disclaimer.
11 *
12 * * Redistributions in binary form must reproduce the above copyright
13 *   notice, this list of conditions and the following disclaimer in the
14 *   documentation and/or other materials provided with the distribution.
15 *
16 * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
17 *   may be used to endorse or promote products derived from this software
18 *   without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32package com.jme3.scene.plugins.blender.textures;
33
34import com.jme3.scene.plugins.blender.BlenderContext;
35import com.jme3.scene.plugins.blender.file.Structure;
36import com.jme3.scene.plugins.blender.textures.NoiseGenerator.MusgraveFunction;
37import com.jme3.texture.Image;
38import com.jme3.texture.Image.Format;
39import com.jme3.texture.Texture;
40import com.jme3.texture.Texture3D;
41import com.jme3.util.BufferUtils;
42import java.nio.ByteBuffer;
43import java.util.ArrayList;
44
45/**
46 * This class generates the 'musgrave' texture.
47 * @author Marcin Roguski (Kaelthas)
48 */
49public class TextureGeneratorMusgrave extends TextureGenerator {
50
51	/**
52	 * Constructor stores the given noise generator.
53	 * @param noiseGenerator
54	 *        the noise generator
55	 */
56	public TextureGeneratorMusgrave(NoiseGenerator noiseGenerator) {
57		super(noiseGenerator);
58	}
59
60	@Override
61	protected Texture generate(Structure tex, int width, int height, int depth, BlenderContext blenderContext) {
62		int stype = ((Number) tex.getFieldValue("stype")).intValue();
63		float noisesize = ((Number) tex.getFieldValue("noisesize")).floatValue();
64		TexturePixel texres = new TexturePixel();
65		float[] texvec = new float[] { 0, 0, 0 };
66		int halfW = width >> 1, halfH = height >> 1, halfD = depth >> 1, index = 0;
67		float wDelta = 1.0f / halfW, hDelta = 1.0f / halfH, dDelta = 1.0f / halfD;
68		float[][] colorBand = this.computeColorband(tex, blenderContext);
69		Format format = colorBand != null ? Format.RGBA8 : Format.Luminance8;
70		int bytesPerPixel = colorBand != null ? 4 : 1;
71		MusgraveData musgraveData = new MusgraveData(tex);
72		MusgraveFunction musgraveFunction;
73		BrightnessAndContrastData bacd = new BrightnessAndContrastData(tex);
74
75		byte[] data = new byte[width * height * depth * bytesPerPixel];
76		for (int i = -halfW; i < halfW; ++i) {
77			texvec[0] = wDelta * i / noisesize;
78			for (int j = -halfH; j < halfH; ++j) {
79				texvec[1] = hDelta * j / noisesize;
80				for (int k = -halfD; k < halfD; ++k) {
81					texvec[2] = dDelta * k / noisesize;
82					musgraveFunction = NoiseGenerator.musgraveFunctions.get(Integer.valueOf(musgraveData.stype));
83					if(musgraveFunction==null) {
84						throw new IllegalStateException("Unknown type of musgrave texture: " + stype);
85					}
86					texres.intensity = musgraveData.outscale * musgraveFunction.execute(musgraveData, texvec[0], texvec[1], texvec[2]);
87					if(texres.intensity>1) {
88						texres.intensity = 1.0f;
89					} else if(texres.intensity < 0) {
90						texres.intensity = 0.0f;
91					}
92
93					if (colorBand != null) {
94						int colorbandIndex = (int) (texres.intensity * 1000.0f);
95						texres.red = colorBand[colorbandIndex][0];
96						texres.green = colorBand[colorbandIndex][1];
97						texres.blue = colorBand[colorbandIndex][2];
98
99						this.applyBrightnessAndContrast(texres, bacd.contrast, bacd.brightness);
100						data[index++] = (byte) (texres.red * 255.0f);
101						data[index++] = (byte) (texres.green * 255.0f);
102						data[index++] = (byte) (texres.blue * 255.0f);
103						data[index++] = (byte) (colorBand[colorbandIndex][3] * 255.0f);
104					} else {
105						this.applyBrightnessAndContrast(bacd, texres);
106						data[index++] = (byte) (texres.intensity * 255.0f);
107					}
108				}
109			}
110		}
111		ArrayList<ByteBuffer> dataArray = new ArrayList<ByteBuffer>(1);
112		dataArray.add(BufferUtils.createByteBuffer(data));
113		return new Texture3D(new Image(format, width, height, depth, dataArray));
114	}
115
116    protected static class MusgraveData {
117    	public final int stype;
118    	public final float outscale;
119    	public final float h;
120    	public final float lacunarity;
121    	public final float octaves;
122    	public final int noisebasis;
123    	public final float offset;
124    	public final float gain;
125
126    	public MusgraveData(Structure tex) {
127    		stype = ((Number) tex.getFieldValue("stype")).intValue();
128            outscale = ((Number) tex.getFieldValue("ns_outscale")).floatValue();
129            h = ((Number) tex.getFieldValue("mg_H")).floatValue();
130            lacunarity = ((Number) tex.getFieldValue("mg_lacunarity")).floatValue();
131            octaves = ((Number) tex.getFieldValue("mg_octaves")).floatValue();
132            noisebasis = ((Number) tex.getFieldValue("noisebasis")).intValue();
133            offset = ((Number) tex.getFieldValue("mg_offset")).floatValue();
134            gain = ((Number) tex.getFieldValue("mg_gain")).floatValue();
135		}
136    }
137}
138