Created
February 1, 2017 11:35
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RColor class for Titanium. Taken from https://github.com/sterlingwes/RandomColor and slightly modified.
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| function RColor() { | |
| this.hue = Math.random(); | |
| this.goldenRatio = 0.618033988749895; | |
| this.hexwidth = 2; | |
| } | |
| RColor.prototype.hsvToRgb = function (h,s,v) { | |
| var h_i = Math.floor(h*6), | |
| f = h*6 - h_i, | |
| p = v * (1-s), | |
| q = v * (1-f*s), | |
| t = v * (1-(1-f)*s), | |
| r = 255, | |
| g = 255, | |
| b = 255; | |
| switch (h_i) { | |
| case 0: r = v; g = t; b = p; break; | |
| case 1: r = q; g = v; b = p; break; | |
| case 2: r = p; g = v; b = t; break; | |
| case 3: r = p; g = q; b = v; break; | |
| case 4: r = t; g = p; b = v; break; | |
| case 5: r = v; g = p; b = q; break; | |
| } | |
| return [Math.floor(r*256),Math.floor(g*256),Math.floor(b*256)]; | |
| }; | |
| RColor.prototype.padHex = function(str) { | |
| if (str.length > this.hexwidth){ | |
| return str; | |
| } | |
| return new Array(this.hexwidth - str.length + 1).join('0') + str; | |
| }; | |
| RColor.prototype.get = function(hex,saturation,value) { | |
| this.hue += this.goldenRatio; | |
| this.hue %= 1; | |
| if (typeof saturation !== "number") { | |
| saturation = 0.5; | |
| } | |
| if (typeof value !== "number") { | |
| value = 0.95; | |
| } | |
| var rgb = this.hsvToRgb(this.hue,saturation,value); | |
| if (hex) { | |
| return "#" + this.padHex(rgb[0].toString(16)) + | |
| this.padHex(rgb[1].toString(16)) + | |
| this.padHex(rgb[2].toString(16)); | |
| } else { | |
| return rgb; | |
| } | |
| }; | |
| module.exports = RColor; |
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