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html2three

html2three is an experimental library for creating VR content using HTML, CSS and JavaScript. The library has the following features:

  • Float div elements in VR space.
  • Embed images using img tags.
  • Use stylesheets for sophisticated text formatting.
  • Design interactive elements using HTML, CSS and JavaScript.
  • See your hands using a Leap Motion controller.
  • No WebGL or THREE.js knowledge required.

This library provides an effect very similar to CSS 3D transforms or the THREE.js CSS3DRenderer, but neither of these technologies work in VR or in stereo. html2three attempts to bridge that gap.

Online demo:

If you have an Oculus Rift or HTC Vive, you can try the online demo. You will need a WebVR enabled build of either Chrome or Firefox. If you have a Leap Motion device, you should download the Orion Beta SDK so that you can use your hands to interact with the content. Otherwise, you may use a game pad.

How does it work?

This library uses WebGL, WebVR, WebAudio and the Gamepad API. It uses a trick to render HTML content to a Canvas, which is then made into a WebGL texture. When the user interacts with the object in VR, the touch coordinates are transformed back into document space and HTML2THREE library sends a synthetic click event to the corresponding element on the web page. The HTML2THREE library uses the MutationObserver web API to detect changes to DOM elements and updates the WebGL textures whenever a change is detected. This closed interaction loop allows the user to interact with the web page while in VR.

Limitations:

The current version renders under the GearVR, but interaction is not working. Since I don't own a GearVR, correcting this problem is difficult.

Licensing:

I am a strong believer in open source. As such, this code has been released under the Affero GPL license.

How can you help this project?

Please visit my Patreon page to learn how you can support this open-source project with a donation!

Code contributions are welcome, especially if you are able to test and submit patches for hardware I don't have, such as the Google Daydream, GearVR or HTC Vive.

Credits:

This project makes use of THREE.js, the WebVR polyfill and Leap Motion's Orion Beta SDK