expo-graphics-rnge

---

expo-graphics

Tools to help simplify and manage GL/AR state.

Installation

yarn add expo-graphics

Usage

Import the library into your JavaScript file:

import ExpoGraphics from 'expo-graphics';

Components

ExpoGraphics.View

A view that assists with common GL and AR tasks.

Props

Property	Type	Default	Description
isArEnabled	?boolean	null	Enables an ARKit context: iOS Only
isArRunningStateEnabled	?boolean	null	Adds a toggle for ARKit running state: iOS Only
isArCameraStateEnabled	?boolean	null	Renders information related to ARKit the tracking state: iOS Only
arTrackingConfiguration	?AR.TrackingConfiguration	null	Enables an ARKit context: iOS Only
arRunningProps	?object	{}	Props for optional ARRunningState: iOS Only
arCameraProps	?object	{}	Props for optional ARCameraState: iOS Only
isShadowsEnabled	?boolean	false	Overrides the render buffer allowing for shadows, this works by default on Android: iOS Only
onContextCreate	({gl, canvas?, width, height, scale, arSession?}) => Promise	null	Called with the newly created GL context, and optional arSession
onShouldReloadContext	() => boolean	null	A delegate function that requests permission to reload the GL context when the app returns to the foreground
onResize	(layout: Layout) => void	null	Invoked when the view changes size, or the device orientation changes, returning the {x, y, width, height, scale}
shouldIgnoreSafeGuards	?boolean	null	This prevents the app from stopping when run in a simulator, or when AR is run in devices that don't support AR

ExpoGraphics.ARCameraState

Information related to the AR camera's tracking state.

Props

Property	Type	Default	Description
titleStyle	?object	null	The style of the title Text
subtitleStyle	?object	null	The style of the subtitle Text
trackingStateStyles	?{[AR.TrackingState]: object}	null	The title text style used with each TrackingState
[AR.TrackingStateReason.None]	{title:string, subtitle:string}	{ title: 'Having trouble collecting data' }	Used when the AR camera isn't available
[AR.TrackingStateReason.Initializing]	{title:string, subtitle:string}	{ title: 'Initializing, subtitle: 'Move the camera around for better results' }	The camera is starting to collect data
[AR.TrackingStateReason.ExcessiveMotion]	{title:string, subtitle:string}	{ title: 'Excessive motion', subtitle: 'Try moving your camera slower' }	The device is moving too fast
[AR.TrackingStateReason.InsufficientFeatures]	{title:string, subtitle:string}	{title: 'insufficient features', subtitle: 'Try moving your camera around more'}	The camera hasn't collected enough data
[AR.TrackingStateReason.Relocalizing]	{title:string, subtitle:string}	{ title: 'Having trouble collecting data' }	The camera is reseting

ExpoGraphics.ARRunningState

A button used for toggling the AR state

Props

Property	Type	Default	Description
onPress	?Function	null	Called whenever the button is toggled.