smartgame/js/Structure.js

import assets from './assets.js';
import Rect from './Rect.js';
import Vec2 from './Vec2.js';

function findBounds(ctx, arr, bounds) {
	arr.forEach(e => {
		if (e instanceof Array) {
			drawArr(ctx, e);
		} else {
			let right = (e.x + 1) * assets.tiles.tileWidth;
			let bottom = (e.y + 1) * assets.tiles.tileHeight;

			if (bounds.size.x < right)
				bounds.size.x = right;
			if (bounds.size.y < bottom)
				bounds.size.y = bottom;
		}
	});
}

function drawArr(ctx, arr) {
	arr.forEach(e => {
		if (e instanceof Array) {
			drawArr(ctx, e);
		} else {
			assets.tiles.drawTile(ctx, e.tile, e.x, e.y);
		}
	});
}

export default class Structure {
	constructor(x, y, arr) {
		console.log(arr);
		this.can = document.createElement("canvas");
		this.bounds = new Rect(new Vec2(
			x * assets.tiles.tileWidth, y * assets.tiles.tileHeight));

		let ctx = this.can.getContext("2d");
		findBounds(ctx, arr, this.bounds);
		this.can.width = this.bounds.size.x;
		this.can.height = this.bounds.size.y;

		assets.tiles.whenReady(() => drawArr(ctx, arr));
		console.log(this.bounds.pos, this.bounds.size);
	}

	draw(ctx) {
		ctx.drawImage(
			this.can, this.bounds.pos.x, this.bounds.pos.y,
			this.bounds.size.x, this.bounds.size.y);
	}
}