Created
September 17, 2016 16:01
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Another rainbor generator, a little more complex
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function generateRainbowColors(count, createDiv, frequency1, frequency2, frequency3, phase1, phase2, phase3, center, width) { | |
var colors = []; | |
if(!count) count = 50; | |
if(!createDiv) createDiv = false; | |
if(!center) center = 128; | |
if(!width) width = 127; | |
if(!frequency1) frequency1 = .3; | |
if(!frequency2) frequency2 = .3; | |
if(!frequency3) frequency3 = .3; | |
if(!phase1) phase1 = 0; | |
if(!phase2) phase2 = 2; | |
if(!phase3) phase3 = 4; | |
var ww = window.innerWidth; | |
var w = Math.ceil(ww / 30); | |
var x = 0; | |
var y = 0; | |
function byte2Hex(n) { | |
var nybHexString = "0123456789ABCDEF"; | |
return String(nybHexString.substr((n >> 4) & 0x0F,1)) + nybHexString.substr(n & 0x0F,1); | |
} | |
function RGB2Color(r,g,b) { | |
return '#' + byte2Hex(r) + byte2Hex(g) + byte2Hex(b); | |
} | |
var red, green, blue, color; | |
for (var i = 0; i < count; i++){ | |
red = Math.sin(frequency1 * i + phase1) * width + center; | |
green = Math.sin(frequency2 * i + phase2) * width + center; | |
blue = Math.sin(frequency3 * i + phase3) * width + center; | |
color = RGB2Color(red, green, blue); | |
colors.push(color); | |
if(createDiv) { | |
var div = document.createElement("div"); | |
div.style.position = "absolute"; | |
div.style.left = x + "px"; | |
div.style.top = y + "px"; | |
div.style.width = w + "px"; | |
div.style.height = w + "px"; | |
div.style.backgroundColor = color; | |
document.body.appendChild(div); | |
x = x + w; | |
if(x > ww){ | |
x = 0; | |
y = y + w; | |
div.style.left = x + "px"; | |
div.style.top = y + "px"; | |
} | |
} | |
} | |
return colors; | |
} |
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