diff options
Diffstat (limited to 'node_modules/chroma-js/src/conversions/hsl2rgb.coffee')
| -rw-r--r-- | node_modules/chroma-js/src/conversions/hsl2rgb.coffee | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/node_modules/chroma-js/src/conversions/hsl2rgb.coffee b/node_modules/chroma-js/src/conversions/hsl2rgb.coffee new file mode 100644 index 0000000000..f9c021f478 --- /dev/null +++ b/node_modules/chroma-js/src/conversions/hsl2rgb.coffee @@ -0,0 +1,28 @@ + +hsl2rgb = () -> + [h,s,l] = unpack arguments + if s == 0 + r = g = b = l*255 + else + t3 = [0,0,0] + c = [0,0,0] + t2 = if l < 0.5 then l * (1+s) else l+s-l*s + t1 = 2 * l - t2 + h /= 360 + t3[0] = h + 1/3 + t3[1] = h + t3[2] = h - 1/3 + for i in [0..2] + t3[i] += 1 if t3[i] < 0 + t3[i] -= 1 if t3[i] > 1 + if 6 * t3[i] < 1 + c[i] = t1 + (t2 - t1) * 6 * t3[i] + else if 2 * t3[i] < 1 + c[i] = t2 + else if 3 * t3[i] < 2 + c[i] = t1 + (t2 - t1) * ((2 / 3) - t3[i]) * 6 + else + c[i] = t1 + [r,g,b] = [Math.round(c[0]*255),Math.round(c[1]*255),Math.round(c[2]*255)] + [r,g,b] + |