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 34 public class SmoothFilter extends AbstractFilter { 35 36 private int radius; 37 private float effect; 38 39 public void setRadius(int radius) { 40 this.radius = radius; 41 } 42 43 public int getRadius() { 44 return this.radius; 45 } 46 47 public void setEffect(float effect) { 48 this.effect = effect; 49 } 50 51 public float getEffect() { 52 return this.effect; 53 } 54 55 @Override 56 public int getMargin(int size, int margin) { 57 return super.getMargin(size, margin) + this.radius; 58 } 59 60 @Override 61 public FloatBuffer filter(float sx, float sy, float base, FloatBuffer buffer, int size) { 62 float[] data = buffer.array(); 63 float[] retval = new float[data.length]; 64 65 for (int y = this.radius; y < size - this.radius; y++) { 66 for (int x = this.radius; x < size - this.radius; x++) { 67 int idx = y * size + x; 68 float n = 0; 69 for (int i = -this.radius; i < this.radius + 1; i++) { 70 for (int j = -this.radius; j < this.radius + 1; j++) { 71 n += data[(y + i) * size + x + j]; 72 } 73 } 74 retval[idx] = this.effect * n / (4 * this.radius * (this.radius + 1) + 1) + (1 - this.effect) * data[idx]; 75 } 76 } 77 78 return FloatBuffer.wrap(retval); 79 } 80 } 81
