WebVR

Declarative Virtual Reality in your browsers with a-frame. My Slides from my presentation at Frontend Usergroup Rhein-Main

1. WebVR Declarative Virtual Reality in your browsers with a-frame Carsten Sandtner (@casarock)
2. about:me Carsten Sandtner @casarock Technical Director mediaman //
3. Short History Of VR
4. View Master ~1939 https://flic.kr/p/hkLi6g
5. Project Headsight 1961
6. https://www.youtube.com/watch?v=ISJWZpFIAlQ
7. Sensorama ~1962 https://upload.wikimedia.org/wikipedia/commons/d/dc/Sensorama-morton-heilig-virtual-reality-headset.jpg
8. Virtual Boy 1995 https://flic.kr/p/6Vn8WN
9. VR Today
10. Oculus Rift DK1: 2013 DK2: 2014 Consumer Version: 2016 Image by Oculus VR, LLC
11. Google Cardboard 2014 By Evan-Amos https://commons.wikimedia.org/w/index.php?curid=45580283
12. HTC Vive 2016 Image © by HTC Corporation
13. Playstation VR Oct. 2016 Image © by Sony Computer Entertainment Inc.
14. Microsoft Hololens More AR, not really VR DevKit: 2016
15. VR In A Nutshell
16. https://twitter.com/guystufff/status/713075541738393600/video/1
18. Mobile Based Setup https://developer.mozilla.org/en-US/docs/Web/API/WebVR_API/WebVR_concepts
19. Computer Based Setup https://developer.mozilla.org/en-US/docs/Web/API/WebVR_API/WebVR_concepts
20. Sensors https://developer.mozilla.org/en-US/docs/Web/API/WebVR_API/WebVR_concepts
21. Field Of View https://developer.mozilla.org/en-US/docs/Web/API/WebVR_API/WebVR_concepts
22. Concepts For VR Apps https://developer.mozilla.org/en-US/docs/Web/API/WebVR_API/WebVR_concepts
23. Concepts For VR Apps • Eye strain • Motion Sickness • Latency • FPS • Degrees of Freedom ( DoF ) • Cone of focus • 3D Positional Audio -> Web Audio API! https://media.giphy.com/media/3o6gaVAxUrXlEFYpWw/giphy.gif
24. What Is WebVR?
25. Disclaimer Currently an Editors Draft! (V1.0 since Sptember, 1st 2016) https://mozvr.github.io/webvr-spec/
26. Available APIs • Navigator.getVRDevices • VRDevice/HMDVRDevice • PositionSensorVRDevice • VRPositionState • VREyeParameters • VRFieldOfView/VRFieldOfViewReadOnly
27. Get VR Devices navigator.getVRDevices().then(function(devices) { // Handle found Devices here... });
28. (HMD) VR Device for (var i = 0; i < devices.length; ++i) { if (devices[i] instanceof HMDVRDevice) { gHMD = devices[i]; break; } }
29. Position Sensor // If device found, get Position Sensor. if (gHMD) { for (var i = 0; i < devices.length; ++i) { if (devices[i] instanceof PositionSensorVRDevice && devices[i].hardwareUnitId === gHMD.hardwareUnitId) { gPositionSensor = devices[i]; break; } } }
30. Position State var posState = gPositionSensor.getState(); if (posState.hasPosition) { posPara.textContent = 'Position: x' + (posState.position.x) + ' y' + (posState.position.y) + ' z' + (posState.position.z); } if (posState.hasOrientation) { orientPara.textContent = 'Orientation: x' + (posState.orientation.x) + ' y' + (posState.orientation.y) + ' z' + (posState.orientation.z); }
31. „Learn WebGL And Start Creating VR …“
32. Stereoscopic Rendering in WebGL /* https://hacks.mozilla.org/2015/09/stereoscopic-rendering-in-webvr/ */ function update() { // ... other stuff happens here ... // left eye gl.viewport(0, 0, canvas.width / 2, canvas.height); mat4.multiply(mvpMatrix, leftEyeProjectionMatrix, leftEyeViewMatrix); gl.uniformMatrix4fv(uniforms.uMVPMatrixLocation, false, mvpMatrix); gl.drawElements(mode, count, type, offset); // right eye gl.viewport(canvas.width / 2, 0, canvas.width / 2, canvas.height); mat4.multiply(mvpMatrix, rightEyeProjectionMatrix, rightEyeViewMatrix); gl.uniformMatrix4fv(uniforms.uMVPMatrixLocation, false, mvpMatrix); gl.drawElements(gl.TRIANGLES, n, gl.UNSIGNED_SHORT, 0); requestAnimationFrame(update); }
33. „… or use a Boilerplate or Frameworks!“
34. three.js WebVR Renderer <script src="js/three.min.js"></script> <script src="js/effects/VREffect.js"></script> <script src="js/controls/VRControls.js"></script> <script> ... var effect = new THREE.VREffect( renderer ); ... effect.render( scene, camera ); </script>
35. „Don’t reinvent the squared wheel!“
36. WebVR Boilerplate three.js + webVRControls https://github.com/borismus/webvr-boilerplate
37. But: „declarative“?
38. Mozilla A-Frame Building blocks for the virtual reality web
39. – https://aframe.io/ „Use markup to create VR experiences that work across desktop, iOS, Android, and the Oculus Rift.“
40. Hello World <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Hello, World!</title> <script src="https://aframe.io/releases/0.2.0/aframe.min.js"></script> </head> <body> <a-scene> <a-box id="mybox" color="#6173F4" width="1" height="1" depth="1" position="1 1 1" rotation="0 0 0" scale="1 1 1"> </a-box> <a-sky color="#bbb"></a-sky> </a-scene> </body> </html>
42. Animated Box <!DOCTYPE html> <html> <head>. . .</head> <body> <a-scene> <a-box id="mybox" color="#6173F4" width="1" height="1" depth="1" position="1 1 1" rotation="0 0 0" scale="1 1 1"> <a-animation attribute="rotation" repeat="indefinite" to="0 180 0"></a-animation> </a-box> </a-scene> </body> </html>
44. Pointer <!DOCTYPE html> <html> <head>. . .</head> <body> <a-scene> <a-box id="mybox" color="#6173F4" width="1" height="1" depth="1" position="1 1 1" rotation="0 0 0" scale="1 1 1"> <a-animation attribute="rotation" repeat="indefinite" to="0 180 0"></a-animation> </a-box> <a-camera position="0 0 0"> <a-cursor color="#0000ff"> </a-camera> </a-scene> </body> </html>
46. Add Events <!DOCTYPE html> <html> <head>. . .</head> <body> <a-scene> <a-box id="mybox" color="#6173F4" width="1" height="1" depth="1" position="1 1 -5" rotation="0 0 0" scale="1 1 1"> <a-animation attribute="rotation" repeat="indefinite" to="0 180 0"></a-animation> <a-event name="mouseenter" color="#ff0000"></a-event> <a-event name="mouseleave" color="#6173F4"></a-event> </a-box> <a-camera position="0 0 0"> <a-cursor color="#0000ff"> </a-camera> <a-sky color="#bbb"></a-sky> </a-scene> </body> </html>
47. Add Events (Pure JS) var box = document.querySelector('#mybox'); box.addEventListener('mouseenter', function () { box.setAttribute('material', {color: '#ff0000'}); }); box.addEventListener('mouseleave', function() { box.setAttribute('material', {color: '#6173F4'}); });
50. Input Devices?
51. Image © 2015 Microsoft
52. Image by Oculus VR, LLC
53. Image © by HTC Corporation
55. By Evan-Amos - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=18936731
56. Why WebVR?
57. –Internet „VR is just for Gaming!“
58. –Internet „Using WebGL is complicated.“
59. Some use cases • Immersive reportages • 3D Handbooks/Instructions • Panorama view without stupid plugins • Marketing instrument. (Supplements in magazines)
60. Some great examples
61. http://www.360syria.com/
62. https://www.washingtonpost.com/video/mars/public/
63. https://s3.amazonaws.com/vr-asset-repo/heart_demo_slack.html
64. APainter - https://aframe.io/a-painter/
65. Resources
66. • https://webvr.rocks/ • https://aframe.io/ • https://developer.mozilla.org/de/docs/Web/API/WebVR_API
67. Conclusion
68. VR is amazing
69. WebVR is amazing… … but it’s not ready 
 (Editors Draft, Browser support) … and has high Hardware Requirements! … HMD Devices are not cheap. 
 (Except: Google Cardboard) … and it’s a pleasure to create content!
70. WebVR is amazing Carsten Sandtner @casarock sandtner@mediaman.de