From eba53381ec22487d27ab71cbae8c775c25d7ed75 Mon Sep 17 00:00:00 2001 From: Lyft Macbook Pro Date: Fri, 21 Sep 2018 16:56:17 +0200 Subject: [PATCH] initial commit --- LICENSE.md | 201 ++++++++++++++++++++++++++++++++++++++++++++++++ package.json | 12 +++ src/curves.js | 36 +++++++++ src/generate.js | 111 ++++++++++++++++++++++++++ 4 files changed, 360 insertions(+) create mode 100755 LICENSE.md create mode 100755 package.json create mode 100644 src/curves.js create mode 100644 src/generate.js diff --git a/LICENSE.md b/LICENSE.md new file mode 100755 index 0000000..806595a --- /dev/null +++ b/LICENSE.md @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + +TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + +1. 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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + +Copyright 2014 Lyft, Inc. + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. diff --git a/package.json b/package.json new file mode 100755 index 0000000..0ed7fd4 --- /dev/null +++ b/package.json @@ -0,0 +1,12 @@ +{ + "name": "lyft-coloralgorithm", + "version": "1.0.0", + "description": "Creates color sets", + "main": "src/generate.js", + "author": "Kevyn Arnott ", + "license": "Apache-2.0", + "dependencies": { + "chroma-js": "^1.3.7", + "bezier-easing": "^2.1.0", + }, +} diff --git a/src/curves.js b/src/curves.js new file mode 100644 index 0000000..be9b47b --- /dev/null +++ b/src/curves.js @@ -0,0 +1,36 @@ +import bezier from 'bezier-easing' + +export const linear = bezier(0.5,0.5,0.5,0.5) + +export const easeInCubic = bezier(0.55, 0.055, 0.675, 0.19) +export const easeOutCubic = bezier(0.215, 0.61, 0.355, 1) +export const easeInOutCubic = bezier(0.645, 0.045, 0.355, 1) + +export const easeInSine = bezier(0.47, 0, 0.745, 0.715) +export const easeOutSine = bezier(0.39, 0.575, 0.565, 1) +export const easeInOutSine = bezier(0.445, 0.05, 0.55, 0.95) + + +export const easeInQuad = bezier(0.55, 0.085, 0.68, 0.53) +export const easeOutQuad = bezier(0.25, 0.46, 0.45, 0.94) +export const easeInOutQuad = bezier(0.455, 0.03, 0.515, 0.955) + +export const easeInQuart = bezier(0.895, 0.03, 0.685, 0.22) +export const easeOutQuart = bezier(0.165, 0.84, 0.44, 1) +export const easeInOutQuart = bezier(0.77, 0, 0.175, 1) + +export const easeInCirc = bezier(0.6, 0.04, 0.98, 0.335) +export const easeOutCirc = bezier(0.075, 0.82, 0.165, 1) +export const easeInOutCirc = bezier(0.785, 0.135, 0.15, 0.86) + +export const easeInQuint = bezier(0.755, 0.05, 0.855, 0.06) +export const easeOutQuint = bezier(0.23, 1, 0.32, 1) +export const easeInOutQuint = bezier(0.86, 0, 0.07, 1) + +export const easeInExpo = bezier(0.95, 0.05, 0.795, 0.035) +export const easeOutExpo = bezier(0.19, 1, 0.22, 1) +export const easeInOutExpo = bezier(1, 0, 0, 1) + +export const easeInBack = bezier(0.6, -0.28, 0.735, 0.045) +export const easeOutBack = bezier(0.175, 0.885, 0.32, 1.275) +export const easeInOutBack = bezier(0.68, -0.55, 0.265, 1.55) diff --git a/src/generate.js b/src/generate.js new file mode 100644 index 0000000..7b708e1 --- /dev/null +++ b/src/generate.js @@ -0,0 +1,111 @@ +import chroma from 'chroma-js' +import * as Curves from './curves.js' +import bezier from 'bezier-easing' + +function distribute(value, rangeA, rangeB) { + + const [fromLow, fromHigh] = Array.from(rangeA) + const [toLow, toHigh] = Array.from(rangeB) + + const result = toLow + (((value - fromLow) / (fromHigh - fromLow)) * (toHigh - toLow)); + + if (toLow < toHigh) { + if (result < toLow) { return toLow } + if (result > toHigh) { return toHigh } + } else { + if (result > toLow) { return toLow } + if (result < toHigh) { return toHigh } + } + + return result; +} + +export default function({specs}) { + + function generateNumberOfSteps(curve, steps) { + var array = [] + for (var step in Array.from(Array(steps).keys())) { + const value = curve(step/ (steps - 1)) + array.push(value) + + } + array.reverse() + return array + } + + var lum_array = generateNumberOfSteps(Curves[specs.lum_curve], specs.steps) + var sat_array = generateNumberOfSteps(Curves[specs.sat_curve], specs.steps) + var hue_array = generateNumberOfSteps(Curves[specs.hue_curve], specs.steps) + var lum_array_adjusted = [] + var sat_array_adjusted = [] + var hue_array_adjusted = [] + + for (var index in lum_array){ + const step = lum_array[index] + lum_array_adjusted.push(distribute(step, [0, 1], [specs.lum_end * .01, specs.lum_start *.01], true)) + } + + + for (var index in sat_array ){ + const step = sat_array[index] + var sat_step = distribute(step, [0, 1], [specs.sat_start * .01, specs.sat_end *.01], true) + + sat_step = sat_step * (specs.sat_rate *.01) + sat_array_adjusted.push(sat_step) + } + + for (var index in hue_array){ + const step = hue_array[index] + hue_array_adjusted.push(distribute(step, [0,1], [specs.hue_start, specs.hue_end])) + } + + sat_array_adjusted.reverse() + hue_array_adjusted.reverse() + + lum_array = lum_array_adjusted + sat_array = sat_array_adjusted + hue_array = hue_array_adjusted + + var colorMap = [] + + for (var index in lum_array) { + + var step = lum_array[index] + + var params = { + hue:hue_array[index], + saturation:sat_array[index], + luminosity:lum_array[index], + } + + if (params.saturation > 1) {params.saturation = 1} + + var hex = chroma(chroma.hsv([params.hue, params.saturation, params.luminosity])) + var hexRGB = chroma(chroma.hsv([params.hue, params.saturation, params.luminosity])).rgb() + + const contrastWhite = chroma.contrast(hex, "white").toFixed(2) + const contrastBlack = chroma.contrast(hex, "black").toFixed(2) + + var displayColor = "" + if (contrastWhite >= 4.5) { displayColor = "white" } else { displayColor = "black" } + + var colorObj = { + hex: chroma(hex).hex(), + hue: chroma(hex).hsv()[0], + sat: chroma(hex).hsv()[1], + lum: chroma(hex).hsv()[2], + hsv: chroma(hex).hsv(), + hsl: chroma(hex).hsl(), + rgb: chroma(hex).rgb(), + hueRange: [specs.hue_start, specs.hue_end], + steps:specs.steps, + label:specs.modifier * index, + contrastBlack:contrastBlack, + contrastWhite:contrastWhite, + displayColor:displayColor, + } + colorMap.push(colorObj) + } + + return colorMap +}