基于 Canvas blog
(r, g, b) 为 (cos(x), cos(x+PI/3), cos(x+PI/6))
原理:Tutorial: Making annoying rainbows and other color cycles in Javascript
(r, g, b) 为 (cos(x), cos(x+PI/3), cos(x+PI/6))
原理:Tutorial: Making annoying rainbows and other color cycles in Javascript