plastic = {
const p1 = 0.7548776662466927; // inverse of plastic number
const p2 = 0.5698402909980532;
return function plastic (index) {
return [(p1 * index) % 1, (p2 * index) % 1];
}
}
golden = {
const p = 0.618033988749894848; // inverse of golden ratio
return function golden (index) {
return p * index % 1;
}
}
halton23 = function halton23 (index) {
return [halton(index, 2), halton(index, 3)]
}
halton = function halton (index, base) {
let fraction = 1;
let result = 0;
while (index > 0) {
fraction /= base;
result += fraction * (index % base);
index = ~~(index / base); // floor division
}
return result;
}
npts = 4000
data = [...Array(npts).keys()].map(halton23)
plastic_data = [...Array(npts).keys()].map(plastic)
coloring = (d, i) => d3.interpolatePurples(Math.pow(i/npts, 5))
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