Add hide-on-enter-vr component analog to hide-on-enter-ar

Author: dmarcos

Diff for: docs/components/hide-on-enter-vr.md

@@ -0,0 +1,26 @@
+	---
+title: hide-on-enter-vr
+type: components
+layout: docs
+parent_section: components
+source_code: src/components/hide-on-enter-vr.js
+examples: []
+---
+
+When the user enters VR this component will hide the entity by toggling it's `visible` state.
+
+Depending on the immersive mode: VR or AR one might want to show / hide different entities.
+
+## Example
+
+```html
+<a-entity hide-on-enter-vr></a-entity>
+```
+
+## Properties
+
+None
+
+## Events
+
+None

Diff for: src/components/hide-on-enter-vr.js

@@ -0,0 +1,15 @@
+var register = require('../core/component').registerComponent;
+
+module.exports.Component = register('hide-on-enter-vr', {
+  init: function () {
+    var self = this;
+    this.el.sceneEl.addEventListener('enter-vr', function () {
+      if (self.el.sceneEl.is('vr-mode')) {
+        self.el.object3D.visible = false;
+      }
+    });
+    this.el.sceneEl.addEventListener('exit-vr', function () {
+      self.el.object3D.visible = true;
+    });
+  }
+});

Diff for: src/components/index.js

@@ -10,6 +10,7 @@ require('./hand-tracking-controls');
 require('./hand-tracking-grab-controls');
 require('./hand-controls');
 require('./hide-on-enter-ar');
+require('./hide-on-enter-vr');
 require('./hp-mixed-reality-controls');
 require('./layer');
 require('./laser-controls');