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 OptimizedErode extends AbstractFilter { 3559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 3659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta private float talus; 3759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta private int radius; 3859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 3959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public OptimizedErode setRadius(int radius) { 4059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta this.radius = radius; 4159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return this; 4259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 4359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 4459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public int getRadius() { 4559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return this.radius; 4659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 4759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 4859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public OptimizedErode setTalus(float talus) { 4959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta this.talus = talus; 5059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return this; 5159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 5259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 5359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public float getTalus() { 5459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return this.talus; 5559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 5659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 5759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta @Override 5859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public int getMargin(int size, int margin) { 5959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return super.getMargin(size, margin) + this.radius; 6059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 6159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 6259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta @Override 6359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public FloatBuffer filter(float sx, float sy, float base, FloatBuffer buffer, int size) { 6459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta float[] tmp = buffer.array(); 6559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta float[] retval = new float[tmp.length]; 6659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 6759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta for (int y = this.radius + 1; y < size - this.radius; y++) { 6859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta for (int x = this.radius + 1; x < size - this.radius; x++) { 6959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int idx = y * size + x; 7059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta float h = tmp[idx]; 7159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 7259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta float horizAvg = 0; 7359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int horizCount = 0; 7459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta float vertAvg = 0; 7559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int vertCount = 0; 7659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 7759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta boolean horizT = false; 7859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta boolean vertT = false; 7959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 8059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta for (int i = 0; i >= -this.radius; i--) { 8159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int idxV = (y + i) * size + x; 8259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int idxVL = (y + i - 1) * size + x; 8359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int idxH = y * size + x + i; 8459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta int idxHL = y * size + x + i - 1; 8559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta float hV = tmp[idxV]; 8659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta float hH = tmp[idxH]; 8759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 8859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (Math.abs(h - hV) > this.talus && Math.abs(h - tmp[idxVL]) > this.talus || vertT) { 8959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta vertT = true; 9059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } else { 9159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (Math.abs(h - hV) <= this.talus) { 9259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta vertAvg += hV; 9359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta vertCount++; 9459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 9559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 9659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 9759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (Math.abs(h - hH) > this.talus && Math.abs(h - tmp[idxHL]) > this.talus || horizT) { 9859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta horizT = true; 9959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } else { 10059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (Math.abs(h - hH) <= this.talus) { 10159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta horizAvg += hH; 10259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta horizCount++; 10359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 10459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 10559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 10659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 10759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta retval[idx] = 0.5f * (vertAvg / (vertCount > 0 ? vertCount : 1) + horizAvg / (horizCount > 0 ? horizCount : 1)); 10859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 10959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 11059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return FloatBuffer.wrap(retval); 11159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 11259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 11359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta} 114