159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta/** 259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Copyright (c) 2011, Novyon Events 359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * All rights reserved. 559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Redistribution and use in source and binary forms, with or without 759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * modification, are permitted provided that the following conditions are met: 859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * - Redistributions of source code must retain the above copyright notice, this 1059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * list of conditions and the following disclaimer. 1159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 1259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * - Redistributions in binary form must reproduce the above copyright notice, 1359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * this list of conditions and the following disclaimer in the documentation 1459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * and/or other materials provided with the distribution. 1559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 1659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 1759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 2059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 2159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 2259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 2359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 2459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 2559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 2659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 2859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @author Anthyon 2959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 3059b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartapackage com.jme3.terrain.noise.filter; 3159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 3259b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartaimport java.nio.FloatBuffer; 3359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 3459b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartapublic class ThermalErodeFilter extends AbstractFilter { 3559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 3659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta private float talus; 3759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta private float c; 3859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 3959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public ThermalErodeFilter setC(float c) { 4059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta this.c = c; 4159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return this; 4259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 4359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 4459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public ThermalErodeFilter setTalus(float talus) { 4559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta this.talus = talus; 4659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return this; 4759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 4859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 4959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta @Override 5059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public int getMargin(int size, int margin) { 5159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return super.getMargin(size, margin) + 1; 5259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 5359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 5459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta @Override 5559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public FloatBuffer filter(float sx, float sy, float base, FloatBuffer buffer, int workSize) { 5659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta float[] ga = buffer.array(); 5759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta float[] sa = new float[workSize * workSize]; 5859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 5959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int[] idxrel = { -workSize - 1, -workSize + 1, workSize - 1, workSize + 1 }; 6059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 6159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta for (int y = 0; y < workSize; y++) { 6259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta for (int x = 0; x < workSize; x++) { 6359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int idx = y * workSize + x; 6459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta ga[idx] += sa[idx]; 6559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta sa[idx] = 0; 6659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 6759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta float[] deltas = new float[idxrel.length]; 6859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta float deltaMax = this.talus; 6959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta float deltaTotal = 0; 7059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 7159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta for (int j = 0; j < idxrel.length; j++) { 7259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (idx + idxrel[j] > 0 && idx + idxrel[j] < ga.length) { 7359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta float dj = ga[idx] - ga[idx + idxrel[j]]; 7459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (dj > this.talus) { 7559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta deltas[j] = dj; 7659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta deltaTotal += dj; 7759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (dj > deltaMax) { 7859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta deltaMax = dj; 7959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 8059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 8159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 8259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 8359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 8459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta for (int j = 0; j < idxrel.length; j++) { 8559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (deltas[j] != 0) { 8659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta float d = this.c * (deltaMax - this.talus) * deltas[j] / deltaTotal; 8759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (d > ga[idx] + sa[idx]) { 8859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta d = ga[idx] + sa[idx]; 8959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 9059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta sa[idx] -= d; 9159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta sa[idx + idxrel[j]] += d; 9259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 9359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta deltas[j] = 0; 9459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 9559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 9659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 9759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 9859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return buffer; 9959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 10059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 10159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta} 102