This is a simple Android Virtual Reality (VR) demo for Google Cardboard using:

• Google VR SDK for Android (https://developers.google.com/vr/android/)
• JMini3d: a 3d library for Android and GWT (https://github.com/mobialia/jmini3d)

It includes 2 scenes with animated 3D buttons to change between scenes.

To "click" a button you must look to it for one second.

This demo uses the integrated lens distortion in the GVR SDK but it can also do the lens distortion correction using vertex displacement (as proposed in https://www.youtube.com/watch?v=yJVkdsZc9YA). This is faster, but it can cause artifacts in some scenes.

You can enable it setting:

public final static boolean USE_VERTEX_DISPLACEMENT_LENS_DISTORTION = true;

in the VRActivity. The auxiliar code is in the class PincushionUtils.

This is the axis system in the Google VR SDK; -Z is front (the OpenGl standard):

  y
  |  
  |
  |------x
 /
/
Z

The Monkey model was created with Blender.

The sky box used in de demo "mp_velcor" was created by The Mighty Pete and downloaded from http://www.custommapmakers.org/skyboxes.php.