React Three UI

Build UIs with React that work in VR, AR and web contexts.

View Live Examples

We've been using this package for various WebXR projects at Finer Vision. We think it's a good library, so we've open sourced it. If you want more features added or bugs fix please open a pull request or issue

If you're looking for a library that has more features, we'd highly recommend checking out @react-three/uikit or @coconut-xr/koestlich

Install

npm add react-xr-ui

Why?

Until WebXR DOM lands, it's currently not possible to use HTML/CSS to build-out UIs in XR; this package solves some of the pain points over building UIs in XR.

Usage

Here is a full basic setup. This renders everything inside a @react-three/fiber canvas.

The 2D UI is a 1x1 meter red box, with a dark grey border, and a small border radius.

import React from "react";
import { BoxLineGeometry } from "three/examples/jsm/geometries/BoxLineGeometry";
import { Canvas } from "@react-three/fiber";
import { Controllers, XR, XRButton } from "@react-three/xr";
import { OrbitControls, PerspectiveCamera } from "@react-three/drei";
import { XrUi, Layer } from "react-xr-ui";

function Scene() {
  return (
    <group position={[0, 1, -1.88]}>
      <Layer
        width={1}
        height={1}
        backgroundColor="crimson"
        borderRadius={0.1}
        borderWidth={0.02}
        borderColor="#222222"
      />
    </group>
  );
}

export default function Example({ children }: Props) {
  const room = React.useMemo(() => {
    return new BoxLineGeometry(6, 6, 6, 10, 10, 10).translate(0, 3, 0);
  }, []);

  return (
    <>
      <Canvas legacy flat linear gl={{ alpha: false }}>
        <XR>
          <XrUi>
            {/** Background, cameras, controls and lights */}
            <color args={["#333333"]} attach="background" />
            <lineSegments geometry={room}>
              <lineBasicMaterial color="#c0c0c0" />
            </lineSegments>
            <PerspectiveCamera makeDefault position={[0, 1.6, 0]} />
            <OrbitControls makeDefault target={[0, 1, -1.8]} />
            <ambientLight />
            <Controllers />

            {/** 3D Stuff */}
            <></>

            {/** 2D UI */}
            <Scene />
          </XrUi>
        </XR>
      </Canvas>
      <XRButton
        style={{
          position: "absolute",
          bottom: "1em",
          color: "black",
          left: "50%",
          translate: "-50%",
          padding: "0.5em 1em",
          cursor: "pointer",
        }}
        mode="VR"
        sessionInit={{
          optionalFeatures: [
            "local-floor",
            "bounded-floor",
            "hand-tracking",
            "layers",
          ],
        }}
      >
        Enter Immersive VR
      </XRButton>
    </>
  );
}

Roadmap to 1.0.0

• backgroundColor
• backgroundImage
• backgroundSize
• zIndex
• borders (radius, color, width, image)
• automatic children sizing
• overflow: auto (scroll), hidden
• interactive controls for VR
• typography
• flexbox
• publish NPM package
• flex wrap
• less boilerplate setup code
• 1.0 release 🎉
• Optimise rendering by reducing no. canvas elements created
• Add onClick to Interaction component
• Auto width/height calculation of Layer component based on content size

Contributing

nvm use # use an exact Node version
npm install
npm start # dev server localhost:8080