ViroVRSceneNavigator

ViroVRSceneNavigator is the entry point for VR applications. Please see the Scene Navigation Guide for more information on how to properly navigate between scenes.

Example use:

JavaScript

import React from 'react';
import { Viro3DSceneNavigator } from '@viro-community/react-viro';
import MyScene from './MyScene';

function ViroSceneNav() {
    return (
        <Viro3DSceneNavigator
            initialScene={{ scene: MyStartScene }}
        />
    );
}

Props

initialScene (* required)

Type	Description
{ scene: React.Component }	The initial scene to display for your application on application start.

bloomEnabled

Type	Description
boolean	Enable or disable bloom. Bloom adds a soft glow to bright areas in scene, simulating the way bright highlights appear to the human eye. To make an object bloom, this property must be enabled, and the objects's threshold for bloom must be set via its material's bloomThreshold property.

debug

Type	Description
boolean	Used to enable the Dev menu on Android Nougat devices with Cardboard.

hdrEnabled

Type	Description
boolean	When HDR rendering is enabled, Viro uses a deeper color space and renders to a floating point texture, then applies a tone-mapping algorithm to preserve fine details in both bright and dark regions of the scene. If HDR is disabled, then features like Bloom and PBR will not work, and tone-mapping will be disabled. HDR is not supported on all devices.

onExitViro

Type	Description
Function	Called if the user presses the "X" button to exit.

pbrEnabled

Type	Description
boolean	Enable or disable physically-based rendering. Physically based rendering, or PBR, produces more realistic lighting results for your scenes, and provides a more intuitive workflow for artists. To use PBR, this property must be enabled, and materials must use the physicallyBased lighting model. PBR is controlled by a variety of properties, see PBR for details.

shadowsEnabled

Type	Description
boolean	Enable or disable rendering dynamic shadows. If shadows are disabled here, shadow casting lights will simply not cast a shadow.

viroAppProps

Type	Description
Object	A Javascript object containing properties for this Viro app. This can be used to pass in properties from native if you're using a hybrid application.

vrModeEnabled

Type	Description
boolean	vrModeEnabled allows switching to and from VR mode. When set to false, it transitions back to pre-VR (mono) mode. When set to true, we set the view into a full VR mode. This is set to true by default.

Methods

The following functions are available on the ViroVRSceneNavigator component. You can get the handle to the Viro3DSceneNavigator in 2 ways:

1. Use the built-in React Native ref property to grab a reference
2. From your ViroScene. Each ViroScene added to a ViroVRSceneNavigator provides its parent navigator in the variable: this.props.sceneNavigator.

push(scene: { scene: ViroARScene, passProps: Object })

Push the given scene onto scene stack, displaying the scene to the user

Argument	Type	Description
scene	ViroARScene	Scene that will be pushed onto the stack and displayed to the user
passProps	Object	Props to pass to the rendered scene

pop()

Pop the top most scene of the stack, effectively going back to the previous scene.

pop(n: number)

Go back n scenes at once. If n is equal to 1 this is equivalent to calling pop().

jump(scene: { scene: ViroARScene, passProps: Object })

Move to the given scene in the stack, removing it from its current position in the stack and placing it on top, thereby displaying it to the user. If the scene is not already on the stack, this method pushes the scene to the top of the stack, displaying it to the user. This is best used in applications where the user jumps between a set of scenes frequently.

Argument	Type	Description
scene	ViroARScene	Scene that will be moved or pushed to the top of the stack and displayed to the user
passProps	Object	Props to pass to the rendered scene

replace(scene: { scene: ViroARScene, passProps: Object })

Replace the currently displayed scene (the scene at the top of the stack) with the given scene, displaying it to the user. This leaves the remainder of the stack unchanged.

Argument	Type	Description
scene	ViroARScene	Scene that will replace the scene at the top of stack and be displayed to the user
passProps	Object	Props to pass to the rendered scene

recenterTracking()

Reorients the virtual world such that directly forward of the user is [0, 0, -1] by rotating the scene by the user's y-rotation.