Digital Humanist. Manhattan-based.
function macrotile(key, size = 2, parents = 2) {
let [z, x, y] = key.split("/").map((d) => parseInt(d));
let moves = 0;
while (!(moves >= parents && z % size == 0)) {
x = Math.floor(x / 2);
y = Math.floor(y / 2);
z = z - 1;
moves++;
}
return `${z}/${x}/${y}`;
}
viewof test = Inputs.radio(
["0/0/0", "1/1/1", "2/1/1", "2/3/3", "3/2/2", "4/10/10", "5/6/7"],
{
value: "1/1/1"
}
)
[...children("0/0/0").map((d) => children(d))].flat()
macrotile(test)
macrotile("4/1/1")
macrotile_siblings(test)
function children(tile) {
const [z, x, y] = tile.split("/").map((d) => parseInt(d));
if (z < 0) {
return [`${z + 1}/0/0`];
}
const children = [];
for (let i = 0; i < 4; i++) {
children.push(`${z + 1}/${x * 2 + (i % 2)}/${y * 2 + Math.floor(i / 2)}`);
}
return children;
}
function macrotile_siblings(key, size = 2, parents = 2) {
return macrotile_descendants(macrotile(key, size, parents), size, parents);
}
function macrotile_descendants(macrokey, size = 2, parents = 2) {
if (descendant_cache.has(macrokey)) {
return descendant_cache.get(macrokey);
}
const parent_tiles = [[macrokey]];
while (parent_tiles.length < parents) {
parent_tiles.unshift(parent_tiles[0].map(children).flat());
}
const sibling_tiles = [parent_tiles[0].map(children).flat()];
while (sibling_tiles.length < size) {
sibling_tiles.unshift(sibling_tiles[0].map(children).flat());
}
sibling_tiles.reverse();
const descendants = sibling_tiles.flat();
descendant_cache.set(macrokey, descendants);
return descendants;
}
descendant_cache = new Map()
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