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move random functions to rng class, fix some imports

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Zutatensuppe 2021-05-17 01:12:39 +02:00
parent 07c08019f5
commit 432e1b6668
16 changed files with 71 additions and 80 deletions
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39
build/server/main.js
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@ -21,6 +21,21 @@ class Rng {
var n = (this.rand_high >>> 0) / 0xffffffff;
return (min + n * (max - min + 1)) | 0;
}
// get one random item from the given array
choice(array) {
return array[this.random(0, array.length - 1)];
}
// return a shuffled (shallow) copy of the given array
shuffle(array) {
const arr = array.slice();
for (let i = 0; i <= arr.length - 2; i++) {
const j = this.random(i, arr.length - 1);
const tmp = arr[i];
arr[i] = arr[j];
arr[j] = tmp;
}
return arr;
}
static serialize(rng) {
return {
rand_high: rng.rand_high,
@ -58,21 +73,6 @@ const logger = (...pre) => {
};
// get a unique id
const uniqId = () => Date.now().toString(36) + Math.random().toString(36).substring(2);
// get a random int between min and max (inclusive)
const randomInt = (rng, min, max) => rng.random(min, max);
// get one random item from the given array
const choice = (rng, array) => array[randomInt(rng, 0, array.length - 1)];
// return a shuffled (shallow) copy of the given array
const shuffle = (rng, array) => {
const arr = array.slice();
for (let i = 0; i <= arr.length - 2; i++) {
const j = randomInt(rng, i, arr.length - 1);
const tmp = arr[i];
arr[i] = arr[j];
arr[j] = tmp;
}
return arr;
};
function encodeShape(data) {
if (typeof data === 'number') {
return data;
@ -202,9 +202,6 @@ const hash = (str) => {
var Util = {
hash,
uniqId,
randomInt,
choice,
shuffle,
encodeShape,
decodeShape,
encodeTile,
@ -1345,7 +1342,7 @@ async function createPuzzle(rng, targetTiles, image, ts) {
}
}
// then shuffle the positions
positions = Util.shuffle(rng, positions);
positions = rng.shuffle(positions);
tiles = tiles.map(tile => {
return Util.encodeTile({
idx: tile.idx,
@ -1413,9 +1410,9 @@ function determinePuzzleTileShapes(rng, info) {
let coord = Util.coordByTileIdx(info, i);
shapes[i] = {
top: coord.y === 0 ? 0 : shapes[i - info.tilesX].bottom * -1,
right: coord.x === info.tilesX - 1 ? 0 : Util.choice(rng, tabs),
right: coord.x === info.tilesX - 1 ? 0 : rng.choice(tabs),
left: coord.x === 0 ? 0 : shapes[i - 1].right * -1,
bottom: coord.y === info.tilesY - 1 ? 0 : Util.choice(rng, tabs),
bottom: coord.y === info.tilesY - 1 ? 0 : rng.choice(tabs),
};
}
return shapes.map(Util.encodeShape);