Published
Edited
Apr 18, 2022
function generatePermutations(n, r = n.length) {
if (r > n.length) return [];
else if (r == 1) return n.map((d) => [d]);
return n.flatMap((d) =>
generatePermutations(
n.filter((a) => a !== d),
r - 1
).map((item) => [d, ...item])
);
}
permutations = {
if (safe)
return generatePermutations(
d3.range(vertexCount * polygonCount + slotCount),
slotCount
);
}
filtered = permutations.filter((d) => {
let flag = true;
for (let slot = 0; slot < slotCount; slot++) {
if (
d3
.range(slotCount)
.filter((e) => e !== slot)
.includes(d[slot])
) {
flag = false;
}
}
return flag;
})
parsed = filtered.map((d, i) => {
return d3.range(slotCount).map((e) => {
return emptySlots.includes(parseInt(d[e]))
? {
poly: null,
orientation: null,
boardID: i,
polyID: null
}
: {
poly: parseInt((parseInt(d[e]) - slotCount) / vertexCount),
orientation: (parseInt(d[e]) - slotCount) % vertexCount,
boardID: i,
polyID: parseInt(d[e]) - slotCount
};
});
})
uniqued = parsed.filter((d) => {
const polyIDs = d.map((e) => e.poly).filter((e) => Number.isInteger(e));
return new Set(polyIDs).size == polyIDs.length;
})
colors = [
//these are used in order from top to bottom...
d3.interpolateHsl("black", "#00FFFF"), //to make custom gradients
d3.interpolateHsl("black", "#00FF00"),
d3.interpolateHsl("black", "#CCCCCC"),
d3.interpolateBlues, //or use built-in D3 gradients
d3.interpolatePurples,
d3.interpolateOranges,
d3.interpolateGreys,
d3.interpolateGreens,
d3.interpolateReds,
d3.interpolatePuRd,
d3.interpolateYlGn,
d3.interpolateYlOrBr,
d3.interpolatePuBu
]
.map((c) => {
return d3.range(vertexCount).map((d) => c(d / vertexCount));
})
.flat()
canvas = {
const context = DOM.context2d(canvasWidth, canvasHeight);
context.fillStyle = backgroundColor;
context.fillRect(0, 0, canvasWidth, canvasHeight);
boards.forEach((board) => {
const slots = board.slots.forEach((slot, offset) => {
const xPos = board.x + offset * pixel;
const yPos = board.y;
context.fillStyle = Number.isInteger(slot.poly)
? colors[slot.polyID]
: emptySlotColor;
context.fillRect(xPos, yPos, pixel, pixel);
});
});
return context.canvas;
}
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