gibbon.js/lib/src/systems/boundsDestroy.js

Actor/Component system for use with pixi.js.

import { System } from "../system";
/**
 *
 */
export class BoundsDestroy extends System {
    /**
     * @property {(Actor)=>void} onExit - function to call when object
     * leaves bounds. If a function is specified, the object is not destroyed
     * automatically, but is removed from group.
     */
    onExit;
    /**
     * @property {Rectangle} bounds - objects in system outside the bounds
     * will automatically be destroyed unless an onExit() function is specified.
     * If so, the onExit function will be called instead.
     */
    bounds;
    /**
     *
     * @param {Game} game
     * @param {Container} clip
     * @param {Rectangle} rect
     */
    constructor(rect, clip) {
        super(clip);
        this.bounds = rect;
    }
    update() {
        for (let i = this.objects.length - 1; i >= 0; i--) {
            const o = this.objects[i];
            if (o.isDestroyed) {
                continue;
            }
            const pos = o.position;
            if (this.bounds.contains(pos.x, pos.y) === false) {
                if (this.onExit)
                    this.onExit(o);
                else {
                    o.destroy();
                }
            }
        }
    }
}
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