001 /* 002 * 003 004 Licensed under the Apache License, Version 2.0 (the "License"); 005 you may not use this file except in compliance with the License. 006 You may obtain a copy of the License at 007 008 http://www.apache.org/licenses/LICENSE-2.0 009 010 Unless required by applicable law or agreed to in writing, software 011 distributed under the License is distributed on an "AS IS" BASIS, 012 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 See the License for the specific language governing permissions and 014 limitations under the License. 015 */ 016 017 package railo.runtime.img.math; 018 019 public class MarbleFunction extends CompoundFunction2D { 020 021 public MarbleFunction() { 022 super(new TurbulenceFunction(new Noise(), 6)); 023 } 024 025 public MarbleFunction(Function2D basis) { 026 super(basis); 027 } 028 029 public float evaluate(float x, float y) { 030 return (float)Math.pow(0.5 * (Math.sin(8. * basis.evaluate(x, y)) + 1), 0.77); 031 } 032 033 }