001/*
002Copyright 2006 Jerry Huxtable
003
004Licensed under the Apache License, Version 2.0 (the "License");
005you may not use this file except in compliance with the License.
006You may obtain a copy of the License at
007
008   http://www.apache.org/licenses/LICENSE-2.0
009
010Unless required by applicable law or agreed to in writing, software
011distributed under the License is distributed on an "AS IS" BASIS,
012WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013See the License for the specific language governing permissions and
014limitations under the License.
015*/
016
017package com.jhlabs.math;
018
019public class VLNoise implements Function2D {
020
021        private float distortion = 10.0f;
022
023        public void setDistortion(float distortion) {
024                this.distortion = distortion;
025        }
026
027        public float getDistortion() {
028                return distortion;
029        }
030
031        public float evaluate(float x, float y) {
032                float ox = Noise.noise2(x+0.5f, y) * distortion;
033                float oy = Noise.noise2(x, y+0.5f) * distortion;
034                return Noise.noise2(x+ox, y+oy);
035        }
036
037}