smartgame/js/Entity.js

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

export class Trait {
	constructor(entity, name) {
		this.name = name;
		this.entity = entity;
		this.enabled = true;
	}

	init() {}
	update(dt) {}
}

export default class Entity {
	constructor(level) {
		this.level = level;
		this.bounds = new Rect();
		this.velocity = new Vec2();
		this.t = {};
		this.traits = [];
	}

	init() {
		for (let trait of this.traits) {
			trait.init();
		}
	}

	update(dt) {
		for (let trait of this.traits) {
			if (trait.enabled)
				trait.update(dt);
		}

		this.bounds.pos.x += this.velocity.x * dt;
		this.bounds.pos.y += this.velocity.y * dt;
	}

	draw(ctx) {}

	has(name) {
		let t = this.t[name];
		return t != null && t.enabled;
	}

	addTrait(t) {
		this.t[t.name] = t;
		this.traits.push(t);
	}
}