feeles-ide/samples/matterjs/plugins/wrapPlugin.js

The hackable and serializable IDE to make learning material

// NOTE: this plugin will be moved to its own repo

import {
	Plugin,
	Composite,
	Body,
} from 'matter';


const MatterWrap = {
	name: 'matter-wrap',

	version: '0.1.0',

	for: 'matter-js@^0.10.0',

	install: function(base) {
		base.after('Engine.update', function() {
			MatterWrap.Engine.update(this);
		});
	},

	Engine: {
		update: function(engine) {
			var world = engine.world,
				bodies = Composite.allBodies(world);

			for (var i = 0; i < bodies.length; i += 1) {
				var body = bodies[i];
				body.plugin = body.plugin || {};

				if (body.plugin.wrap) {
					MatterWrap.Body.wrap(body, body.plugin.wrap);
				}
			}
		}
	},

	Body: {
		wrap: function(body, bounds) {
			var x = null,
				y = null;

			if (typeof bounds.min.x !== 'undefined' && typeof bounds.max.x !== 'undefined') {
				if (body.bounds.min.x > bounds.max.x) {
					x = bounds.min.x - (body.bounds.max.x - body.position.x);
				} else if (body.bounds.max.x < bounds.min.x) {
					x = bounds.max.x - (body.bounds.min.x - body.position.x);
				}
			}

			if (typeof bounds.min.y !== 'undefined' && typeof bounds.max.y !== 'undefined') {
				if (body.bounds.min.y > bounds.max.y) {
					y = bounds.min.y - (body.bounds.max.y - body.position.y);
				} else if (body.bounds.max.y < bounds.min.y) {
					y = bounds.max.y - (body.bounds.min.y - body.position.y);
				}
			}

			if (x !== null || y !== null) {
				Body.setPosition(body, {
					x: x || body.position.x,
					y: y || body.position.y
				});
			}
		}
	}
};

Plugin.register(MatterWrap);

window.MatterWrap = MatterWrap;