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 FractalSumFunction extends CompoundFunction2D { 020 021 private float octaves = 1.0f; 022 023 public FractalSumFunction(Function2D basis) { 024 super(basis); 025 } 026 027 public float evaluate(float x, float y) { 028 float t = 0.0f; 029 030 for (float f = 1.0f; f <= octaves; f *= 2) 031 t += basis.evaluate(f * x, f * y) / f; 032 return t; 033 } 034 035 }