@nichathan-gaming/map-generator/mapGenerator/crawlingGenerator/crawl.js

Creates and generates a 2 dimensional array with various path generation functions.

import mapGenerator from "../mapGenerator.js";
import getRandomRange from '../helpers/getRandomRange.js';
import coinFlip from '../helpers/coinFlip.js';
import assertIndex from "../helpers/assertIndex.js";
import { assertInstanceOf } from "@nichathan-gaming/assertions";

/**
 * Crawls along the map randomly
 * @param {mapGenerator} map The current game map element
 * @param {index} startIndex The index to start crawling at
 * @param {index} minIndex The minimum crawling index, either -1 or 0
 */
const crawl = (map, startIndex, minIndex) => {
    assertInstanceOf(map, mapGenerator);
    assertIndex(startIndex);
    assertIndex(minIndex);

    const width = map.getWidth();
    const height = map.getHeight();

    while(true){
        map.setUnwalkableValueAtIndex(startIndex);

        if(coinFlip()) startIndex[0] += getRandomRange(minIndex[0], 2);
        else startIndex[1] += getRandomRange(minIndex[1], 2);

        if (startIndex[0] < 0 || startIndex[0] > width || startIndex[1] < 0 || startIndex[1] > height) {
            break;
        };
    };
};

export default crawl;