1 /** 2 * Copyright (c) 2011, Novyon Events 3 * 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * - Redistributions of source code must retain the above copyright notice, this 10 * list of conditions and the following disclaimer. 11 * 12 * - Redistributions in binary form must reproduce the above copyright notice, 13 * this list of conditions and the following disclaimer in the documentation 14 * and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 25 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 26 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * @author Anthyon 29 */ 30 package com.jme3.terrain.noise.filter; 31 32 import java.nio.FloatBuffer; 33 import java.util.ArrayList; 34 import java.util.List; 35 36 import com.jme3.terrain.noise.Filter; 37 38 public class IterativeFilter extends AbstractFilter { 39 40 private int iterations; 41 42 private List<Filter> preIterateFilters = new ArrayList<Filter>(); 43 private List<Filter> postIterateFilters = new ArrayList<Filter>(); 44 private Filter filter; 45 46 @Override getMargin(int size, int margin)47 public int getMargin(int size, int margin) { 48 if (!this.isEnabled()) { 49 return margin; 50 } 51 for (Filter f : this.preIterateFilters) { 52 margin = f.getMargin(size, margin); 53 } 54 margin = this.filter.getMargin(size, margin); 55 for (Filter f : this.postIterateFilters) { 56 margin = f.getMargin(size, margin); 57 } 58 return this.iterations * margin + super.getMargin(size, margin); 59 } 60 setIterations(int iterations)61 public void setIterations(int iterations) { 62 this.iterations = iterations; 63 } 64 getIterations()65 public int getIterations() { 66 return this.iterations; 67 } 68 addPostIterateFilter(Filter filter)69 public IterativeFilter addPostIterateFilter(Filter filter) { 70 this.postIterateFilters.add(filter); 71 return this; 72 } 73 addPreIterateFilter(Filter filter)74 public IterativeFilter addPreIterateFilter(Filter filter) { 75 this.preIterateFilters.add(filter); 76 return this; 77 } 78 setFilter(Filter filter)79 public void setFilter(Filter filter) { 80 this.filter = filter; 81 } 82 83 @Override filter(float sx, float sy, float base, FloatBuffer data, int size)84 public FloatBuffer filter(float sx, float sy, float base, FloatBuffer data, int size) { 85 if (!this.isEnabled()) { 86 return data; 87 } 88 FloatBuffer retval = data; 89 90 for (int i = 0; i < this.iterations; i++) { 91 for (Filter f : this.preIterateFilters) { 92 retval = f.doFilter(sx, sy, base, retval, size); 93 } 94 retval = this.filter.doFilter(sx, sy, base, retval, size); 95 for (Filter f : this.postIterateFilters) { 96 retval = f.doFilter(sx, sy, base, retval, size); 97 } 98 } 99 100 return retval; 101 } 102 } 103