1 1
function fallback(/* values ... */) {
2 -
var ilen = arguments.length;
3 -
var i = 0;
4 -
var v;
2 +
var ilen = arguments.length;
3 +
var i = 0;
4 +
var v;
5 5 6 -
for (; i < ilen; ++i) {
7 -
v = arguments[i];
8 -
if (v !== undefined) {
9 -
return v;
10 -
}
11 -
}
6 +
for (; i < ilen; ++i) {
7 +
v = arguments[i];
8 +
if (v !== undefined) {
9 +
return v;
10 +
}
11 +
}
12 12
}
13 13 14 14
export var COLORS = [
15 -
'#FF3784',
16 -
'#36A2EB',
17 -
'#4BC0C0',
18 -
'#F77825',
19 -
'#9966FF',
20 -
'#00A8C6',
21 -
'#379F7A',
22 -
'#CC2738',
23 -
'#8B628A',
24 -
'#8FBE00',
25 -
'#606060',
15 +
'#FF3784',
16 +
'#36A2EB',
17 +
'#4BC0C0',
18 +
'#F77825',
19 +
'#9966FF',
20 +
'#00A8C6',
21 +
'#379F7A',
22 +
'#CC2738',
23 +
'#8B628A',
24 +
'#8FBE00',
25 +
'#606060',
26 26
];
27 27 28 28
// Adapted from http://indiegamr.com/generate-repeatable-random-numbers-in-js/
29 29
var _seed = Date.now();
30 30 31 31
export function srand(seed) {
32 -
_seed = seed;
32 +
_seed = seed;
33 33
}
34 34 35 35
export function rand(min, max) {
36 -
min = min === undefined ? 0 : min;
37 -
max = max === undefined ? 1 : max;
38 -
_seed = (_seed * 9301 + 49297) % 233280;
39 -
return min + (_seed / 233280) * (max - min);
36 +
min = min === undefined ? 0 : min;
37 +
max = max === undefined ? 1 : max;
38 +
_seed = (_seed * 9301 + 49297) % 233280;
39 +
return min + (_seed / 233280) * (max - min);
40 40
}
41 41 42 42
export function numbers(config) {
43 -
var cfg = config || {};
44 -
var min = fallback(cfg.min, 0);
45 -
var max = fallback(cfg.max, 1);
46 -
var from = fallback(cfg.from, []);
47 -
var count = fallback(cfg.count, 8);
48 -
var decimals = fallback(cfg.decimals, 8);
49 -
var continuity = fallback(cfg.continuity, 1);
50 -
var dfactor = Math.pow(10, decimals) || 0;
51 -
var data = [];
52 -
var i, value;
43 +
var cfg = config || {};
44 +
var min = fallback(cfg.min, 0);
45 +
var max = fallback(cfg.max, 1);
46 +
var from = fallback(cfg.from, []);
47 +
var count = fallback(cfg.count, 8);
48 +
var decimals = fallback(cfg.decimals, 8);
49 +
var continuity = fallback(cfg.continuity, 1);
50 +
var dfactor = Math.pow(10, decimals) || 0;
51 +
var data = [];
52 +
var i, value;
53 53 54 -
for (i = 0; i < count; ++i) {
55 -
value = (from[i] || 0) + rand(min, max);
56 -
if (rand() <= continuity) {
57 -
data.push(Math.round(dfactor * value) / dfactor);
58 -
} else {
59 -
data.push(null);
60 -
}
61 -
}
54 +
for (i = 0; i < count; ++i) {
55 +
value = (from[i] || 0) + rand(min, max);
56 +
if (rand() <= continuity) {
57 +
data.push(Math.round(dfactor * value) / dfactor);
58 +
} else {
59 +
data.push(null);
60 +
}
61 +
}
62 62 63 -
return data;
63 +
return data;
64 64
}
65 65 66 66
export function color(offset) {
67 -
var count = COLORS.length;
68 -
var index = offset === undefined ? ~~rand(0, count) : offset;
69 -
return COLORS[index % count];
67 +
var count = COLORS.length;
68 +
var index = offset === undefined ? ~~rand(0, count) : offset;
69 +
return COLORS[index % count];
70 70
}
71 71 72 72
export function generate() {
73 -
return {
74 -
labels: [0, 1, 2, 3, 4, 5, 6, 7],
75 -
datasets: [{
76 -
backgroundColor: color(0),
77 -
data: numbers({
78 -
count: 8,
79 -
max: 0,
80 -
min: -100
81 -
}),
82 -
}, {
83 -
backgroundColor: color(1),
84 -
data: numbers({
85 -
count: 8,
86 -
max: 100,
87 -
min: 0
88 -
}),
89 -
}],
90 -
};
73 +
return {
74 +
labels: [0, 1, 2, 3, 4, 5, 6, 7],
75 +
datasets: [{
76 +
backgroundColor: color(0),
77 +
data: numbers({
78 +
count: 8,
79 +
max: 0,
80 +
min: -100
81 +
}),
82 +
}, {
83 +
backgroundColor: color(1),
84 +
data: numbers({
85 +
count: 8,
86 +
max: 100,
87 +
min: 0
88 +
}),
89 +
}],
90 +
};
91 91
}
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