livecodingspace-app/public/vwf/model/aframe/extras/components/grab.js

(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
'use strict';

require('./src/misc/grab');

},{"./src/misc/grab":2}],2:[function(require,module,exports){
'use strict';

/* global CANNON */

/**
 * Based on aframe/examples/showcase/tracked-controls.
 *
 * Handles events coming from the hand-controls.
 * Determines if the entity is grabbed or released.
 * Updates its position to move along the controller.
 */

module.exports = AFRAME.registerComponent('grab', {
  init: function init() {
    this.system = this.el.sceneEl.systems.physics;

    this.GRABBED_STATE = 'grabbed';

    this.grabbing = false;
    this.hitEl = /** @type {AFRAME.Element}    */null;
    this.physics = /** @type {AFRAME.System}     */this.el.sceneEl.systems.physics;
    this.constraint = /** @type {CANNON.Constraint} */null;

    // Bind event handlers
    this.onHit = this.onHit.bind(this);
    this.onGripOpen = this.onGripOpen.bind(this);
    this.onGripClose = this.onGripClose.bind(this);
  },

  play: function play() {
    var el = this.el;
    el.addEventListener('hit', this.onHit);
    el.addEventListener('gripdown', this.onGripClose);
    el.addEventListener('gripup', this.onGripOpen);
    el.addEventListener('trackpaddown', this.onGripClose);
    el.addEventListener('trackpadup', this.onGripOpen);
    el.addEventListener('triggerdown', this.onGripClose);
    el.addEventListener('triggerup', this.onGripOpen);
  },

  pause: function pause() {
    var el = this.el;
    el.removeEventListener('hit', this.onHit);
    el.removeEventListener('gripdown', this.onGripClose);
    el.removeEventListener('gripup', this.onGripOpen);
    el.removeEventListener('trackpaddown', this.onGripClose);
    el.removeEventListener('trackpadup', this.onGripOpen);
    el.removeEventListener('triggerdown', this.onGripClose);
    el.removeEventListener('triggerup', this.onGripOpen);
  },

  onGripClose: function onGripClose() {
    this.grabbing = true;
  },

  onGripOpen: function onGripOpen() {
    var hitEl = this.hitEl;
    this.grabbing = false;
    if (!hitEl) {
      return;
    }
    hitEl.removeState(this.GRABBED_STATE);
    this.hitEl = undefined;
    this.system.removeConstraint(this.constraint);
    this.constraint = null;
  },

  onHit: function onHit(evt) {
    var hitEl = evt.detail.el;
    // If the element is already grabbed (it could be grabbed by another controller).
    // If the hand is not grabbing the element does not stick.
    // If we're already grabbing something you can't grab again.
    if (!hitEl || hitEl.is(this.GRABBED_STATE) || !this.grabbing || this.hitEl) {
      return;
    }
    hitEl.addState(this.GRABBED_STATE);
    this.hitEl = hitEl;
    this.constraint = new CANNON.LockConstraint(this.el.body, hitEl.body);
    this.system.addConstraint(this.constraint);
  }
});

},{}]},{},[1]);