89 lines
1.6 KiB
JavaScript
89 lines
1.6 KiB
JavaScript
import merge from 'lodash.merge';
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import {compose} from '@avocado/core';
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import {Vector} from '@avocado/math';
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import {StateProperty, Trait} from '../trait';
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import {Entity} from '..';
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const decorate = compose(
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StateProperty('isSpawning', {
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track: true,
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}),
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StateProperty('maxSpawns'),
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);
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export class Spawner extends decorate(Trait) {
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static defaultParams() {
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return {
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spawns: {},
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};
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}
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static defaultState() {
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return {
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isSpawning: true,
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maxSpawns: Infinity,
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};
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}
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static type() {
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return 'spawner';
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}
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destroy() {
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this.children = [];
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}
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constructor(entity, params, state) {
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super(entity, params, state);
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this.children = [];
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this.spawnJSONs = this.params.spawns;
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}
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listeners() {
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return {
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dying: () => {
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this.isSpawning = false;
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},
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};
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}
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methods() {
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return {
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killAllChildren: () => {
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for (let i = 0; i < this.children.length; i++) {
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this.children[i].destroyGently();
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}
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},
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spawn: (key, json = {}) => {
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if (!this.entity.is('listed')) {
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return;
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}
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if (this.maxSpawns <= this.children.length) {
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return;
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}
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const spawnJSON = this.spawnJSONs[key];
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if (!spawnJSON) {
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return;
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}
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const spawn = new Entity(merge(spawnJSON, json));
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this.children.push(spawn);
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spawn.once('destroy', () => {
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const index = this.children.indexOf(spawn);
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this.children.splice(index, 1);
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})
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const list = this.entity.list;
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list.addEntity(spawn);
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},
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};
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}
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}
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