69 lines
1.7 KiB
JavaScript
69 lines
1.7 KiB
JavaScript
import { TILE_SIZE } from "../constants.js";
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import { createCanvas } from "../utils.js";
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import { GameObject } from "./game-object.js";
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export class Map extends GameObject {
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constructor({ name, imageId, elementId, selected = false }) {
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super();
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this.name = name;
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this.imageId = imageId;
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this.image = document.getElementById(imageId);
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this.width = this.image.width;
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this.selected = selected;
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this.elementId = elementId;
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}
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async load() {
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const levelConfig = await fetch("/resources/" + this.name + ".json");
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this.levelConfig = await levelConfig.json();
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}
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get level() {
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if (this._level) {
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return this._level;
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}
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const levelConfig = this.levelConfig;
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const layer = levelConfig.layers[0];
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const { data, height, width } = layer;
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const { ctx, canvas } = createCanvas(width * TILE_SIZE, height * TILE_SIZE);
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for (let row = 0; row < height; row++) {
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for (let col = 0; col < width; col++) {
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if (row < 0 || col < 0 || row >= height || col >= width) continue;
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const tile = data[row * width + col] - 1;
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ctx.drawImage(
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this.image,
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(tile * TILE_SIZE) % this.width,
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Math.floor((tile * TILE_SIZE) / this.width) * TILE_SIZE,
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TILE_SIZE,
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TILE_SIZE,
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col * TILE_SIZE,
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row * TILE_SIZE,
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TILE_SIZE,
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TILE_SIZE
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);
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}
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}
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return (this._level = canvas);
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}
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render(ctx, sourceX, sourceY, width, height) {
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if (!this.levelConfig || !this.selected) {
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return;
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}
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ctx.drawImage(
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this.level,
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sourceX,
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sourceY,
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width,
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height,
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0,
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0,
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width,
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height
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);
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}
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}
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