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Extend colorutils

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Add color invertion and calculation of complementary colors.
This commit is contained in:
Marcel Klehr 2012-02-29 14:16:20 +01:00
parent 0a13615254
commit 173e7c8f27
1 changed files with 15 additions and 0 deletions
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15
static/js/colorutils.js
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@ -120,4 +120,19 @@ colorutils.blend = function(c1, c2, t)
return [colorutils.scale(t, c1[0], c2[0]), colorutils.scale(t, c1[1], c2[1]), colorutils.scale(t, c1[2], c2[2])];
}
colorutils.invert = function(c)
{
return [1 - c[0], 1 - c[1], 1- c[2]];
}
colorutils.complementary = function(c)
{
var inv = colorutils.invert(c);
return [
(inv[0] >= c[0]) ? Math.min(inv[0] * 1.30, 1) : (c[0] * 0.30),
(inv[1] >= c[1]) ? Math.min(inv[1] * 1.59, 1) : (c[1] * 0.59),
(inv[2] >= c[2]) ? Math.min(inv[2] * 1.11, 1) : (c[2] * 0.11)
];
}
exports.colorutils = colorutils;