@nikgraf

React VR

Who knows "A Hitchhiker's Guide to the Galaxy"?

Who of you heard of React VR?

Who of has tried React VR?

Head tracking

Lenses

Screen

The critical pieces

Head mount

How do you make your users look like this?

Immersiveness through lens distortion

Lens*

Physical screen

Virtual Screen

With Lens

Without Lens

*Convex Fresnel Lens

Pincussion Distortion

Projected image

Perceived image

Barrel Distortion

Projected image

Perceived image

https://w3c.github.io/webvr/

WebVR is an experimental JavaScript API that provides access to Virtual Reality devices, such as the Oculus Rift, HTC Vive, Samsung Gear VR, or Google Daydream, in your browser.

Browser enthusiasm

https://iswebvrready.org/

Browser support

https://iswebvrready.org/

Browser installation and configuration instructions

https://webvr.info/

Supported Web Browser

Supported Web Browser

Mobile

Desktop

Virtual Reality Headset

Smartphone and Lenses

Requirements

WebGL

WebVR

React VR

Let's travel a bit …

(Don't forget to bring a towel)

yarn global add react-vr-cli

or

npm install -g react-vr-cli

Files

  • package.json
  • yarn.lock
  • node_modules
  • rn-cli.config.js
  • vr/client.js
  • vr/index.html
  • index.vr.js
  • static_assets/chess-world.jpg
<!-- vr/index.html -->
<html>
  <head>
    <title>firstproject</title>
    <style>body { margin: 0; }</style>
  <head>
  <body>
    <script src="./client.bundle?platform=vr"></script>
    <script>
      ReactVR.init(
        '../index.vr.bundle?platform=vr&dev=true',
        document.body
      );
    </script>
  </body>
</html>

// vr/client.js
import {VRInstance} from 'react-vr-web';

function init(bundle, parent, options) {
  const vr = new VRInstance(
    bundle,
    'firstproject',
    parent,
    { ...options }
  );
  vr.render = function() {
    // Any custom behavior you want to perform
    // on each frame goes here
  };
  // Begin the animation loop
  vr.start();
  return vr;
}

window.ReactVR = {init};
// index.vr.js (part 1)
import React from 'react';
import {
  AppRegistry,
  asset,
  StyleSheet,
  Pano,
  Text,
  View
} from 'react-vr';
// index.vr.js (part 2)
class firstproject extends React.Component {
  render() { return (
    <View>
      <Pano source={asset('chess-world.jpg')}/>
      <Text style={{
        backgroundColor:'blue',
        textAlign:'center',
        textAlignVertical:'center',
        layoutOrigin: [0.5, 0.5],
        transform: [{translate: [0, 0, -3]}],
      }}>
        hello
      </Text>
    </View>
  )}
};

AppRegistry.registerComponent(
 'firstproject', () => firstproject
);
class firstproject extends React.Component {
  render() { return (
    <View>
      <Pano source={asset('reactamsterdam.jpg')}/>
      <Text style={{
        fontSize: 0.4,
        layoutOrigin: [0.5, 0.5],
        transform: [{translate: [0, 0, -3]}],
      }}>
        Welcome to React Amsterdam!
      </Text>
    </View>
  )}
};

AppRegistry.registerComponent(
  'firstproject', () => firstproject
);

Let's travel to Forestonia, maybe learn about it's history.

How to create an Object!

cube.obj

cube.mtl

<View>
  <PointLight style={{
    color:'white',
    transform:[{translate : [0, 400, 700]}]}}
  />
  <Pano source={asset('chess-world.jpg')}/>
  <Model
    style={{ transform: [
      {translate: [0, -5, -20]},
      {rotateY: -30},
      {rotateX: -40}
    ] }}
    source={{
      obj: asset('cube2.obj'),
      mtl: asset('cube2.mtl')
    }}
    lit
  />
</View>
// Tree.js
import React from 'react';
import {asset, Model, View} from 'react-vr';

export default ({ style }) => (
  <View
    style={style}
  >
    <Model
      source={{
        obj: asset('tree-trunk.obj'),
        mtl: asset('tree-trunk.mtl')
      }}
      lit
    />
    <Model
      source={{
        obj: asset('tree-crown.obj'),
        mtl: asset('tree-crown.mtl')
      }}
      lit
      style={{
        transform: [ {translate: [0, 2.5, 0]} ]
      }}
    />
  </View>
);
<Tree
  style={{ transform: [{translate: [0, -1, -5]}] }}
/>
<Tree
  style={{ transform: [{translate: [5, -1, -5]}] }}
/>
import Tree from './components/Tree';

class MyForest extends React.Component {
  render() {
    return (
      <View>
        <Tree
          style={{ transform: [{translate: [0, -1, -5]}] }}
        />
        <Tree
          style={{ transform: [{translate: [5, -1, -5]}] }}
        />
        <AmbientLight intensity={0.4} />
        <PointLight
          style={{color: 'white', transform: [{translate: [0, 400, 700]}]}}
        />
        <Pano source={asset('heaven.png')} />
        <Model
          source={{obj: asset('plane.obj'), mtl: asset('plane.mtl')}}
          lit
          style={{ transform: [{translate: [0, -1, 0]}] }}
        />
      </View>
    );
  }
}

AppRegistry.registerComponent('MyForest', () => MyForest);
// Forest.js Part 1
import { range, map, xprod, flatten } from 'ramda';
import Tree from './Tree';

const randomPosition = () => (Math.floor(Math.random() * 10) - 5);
const randomHeight = () => (Math.random() - 1);
const randomScale = () => (Math.random() * 0.25 + 1);

const grid = xprod(range(0, 10), range(0, 10));
const trees = grid.map((entry, index) => {
  return {
    x: entry[0] * 8 + randomPosition(),
    y: entry[1] * 8 + randomPosition(),
    id: index
  };
});
// Forest.js
export default ({ style }) => (
  <View style={style}>
    {trees.map((tree) => {
      return (
        <Tree
          key={tree.id}
          style={{
            transform: [
              {translate: [
                tree.x, randomHeight(),
                tree.y
              ]},
            ]
          }}
        />
      );
    })}
  </View>
);
<Forest
  style={{
    transform: [{translate: [-35, -1, -35]}],
  }}
/>

Who is going to start with React VR tonight?

export default class Planet extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      rotationX: new Animated.Value(0),
    };
  }

  componentDidMount() {
    Animated.timing(valueReference, {
      duration: 300,
      toValue: 68,
    }).start();
  }

  render() {
    return (
      <View>
        <Marvin
          style={{
            transform: [
              {translate: [3, -2, -8]},
              {rotateY: 20},
              {rotateX: this.state.rotationX},
            ],
          }}
        />

What's the meaning of all that?

https://github.com/nikgraf/webvr-experiments

A Hitchhiker's Guide to React VR

By nikgraf

Source: Sebastian Siemssen

A Hitchhiker's Guide to React VR

  • 1,153

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