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Removed custom hue(), using hsl()

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This commit is contained in:
Christopher Weiss 2015-01-26 16:28:11 -05:00
parent 73faf3413b
commit b9776736d4
1 changed files with 1 additions and 53 deletions
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54
src/Chart.Doughnut.js
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@ -36,58 +36,6 @@
}; };
function hue(part, total) {
// Given the total number of segments (total) and the index of a segment (part) returns a #rrggbb color for the segment
var h = (part / total) * 360,
s = 1,
v = 1,
c = v * s,
x = c * (1 - Math.abs((h / 60) % 2 - 1)),
m = v - c,
r,
g,
b;
switch (Math.floor(h / 60)) {
case 0: // 0 <= h < 60
r = c + m;
g = x + m;
b = 0 + m;
break;
case 1: // 60 <= h < 120
r = x + m;
g = c + m;
b = 0 + m;
break;
case 2: // 120 <= h < 180
r = 0 + m;
g = c + m;
b = x + m;
break;
case 3: // 180 <= h < 240
r = 0 + m;
g = x + m;
b = c + m;
break;
case 4: // 240 <= h < 300
r = x + m;
g = 0 + m;
b = c + m;
break;
case 5: // 300 <= h < 360
r = c + m;
g = 0 + m;
b = x + m;
break;
}
r = '00' + Math.round(r * 255).toString(16);
g = '00' + Math.round(g * 255).toString(16);
b = '00' + Math.round(b * 255).toString(16);
return '#' + r.substr(r.length - 2) + g.substr(g.length - 2) + b.substr(b.length - 2);
}
Chart.Type.extend({ Chart.Type.extend({
//Passing in a name registers this chart in the Chart namespace //Passing in a name registers this chart in the Chart namespace
name: "Doughnut", name: "Doughnut",
@ -125,7 +73,7 @@
data = data.map(function (v, i, a){ data = data.map(function (v, i, a){
if (!v.color) { if (!v.color) {
v.color = hue(i, a.length); v.color = 'hsl(' + (360 * i / a.length) * 360 + ', 100%, 50%)';
return v; return v;
} }
}); });