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.image; 018 019/** 020 * A colormap with the colors of the spectrum. 021 */ 022public class SpectrumColormap implements Colormap { 023 024 /** 025 * Construct a spcetrum color map. 026 */ 027 public SpectrumColormap() { 028 } 029 030 /** 031 * Convert a value in the range 0..1 to an RGB color. 032 * @param v a value in the range 0..1 033 * @return an RGB color 034 */ 035 public int getColor(float v) { 036 return Spectrum.wavelengthToRGB(380+400*ImageMath.clamp(v, 0, 1.0f)); 037 } 038 039}