simple-color-scale/index.js

Simple and lightweight color scale generator Edit

'use strict';

var config = {
    outputStart: 1,
    outputEnd: 100,
    inputStart: 1,
    inputEnd: 100
};

exports.getColor = function (input) {
    // Color Calibration
    // Sets the color range between the minimum acceptable value and the maximum value
    var plus = (config.outputEnd - config.outputStart) / (config.inputEnd - config.inputStart);
    var i = Math.round(config.outputStart + plus * (input - config.inputStart));
    // Cutoff min and max
    i = i < config.outputStart ? config.outputStart : i;
    i = i > config.outputEnd ? config.outputEnd : i;

    var r = Math.round(Math.sin(0.024 * i + 0) * 127 + 128);
    var g = Math.round(Math.sin(0.024 * i + 2) * 127 + 128);
    var b = Math.round(Math.sin(0.024 * i + 4) * 127 + 128);
    return 'rgb(' + r + ',' + g + ',' + b + ')';
};

exports.setConfig = function (newConfig) {
    config = Object.assign({}, config, newConfig);
};