Created
July 9, 2020 20:41
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React Native Image 3D Parallax using mobile gyroscope (Expo's DeviceMotion)
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import React from 'react'; | |
import { View, Animated, Easing } from 'react-native'; | |
import { DeviceMotion } from 'expo-sensors'; | |
class AnimatedAnalyticsImage extends React.Component { | |
state = { | |
motionX: 0, | |
motionY: 0, | |
motionZ: 0 | |
} | |
transformValue = { | |
X: new Animated.Value(0), | |
Y: new Animated.Value(0) | |
} | |
cardTransform = { | |
X: '0deg', | |
Y: '0deg' | |
} | |
componentDidMount() { | |
DeviceMotion.isAvailableAsync() | |
.then(available => { | |
if (available) { | |
this.setState({ motionAvailable: true }); | |
DeviceMotion.addListener(responder => { | |
this.setState({ | |
motionX: responder.rotation.alpha, | |
motionY: responder.rotation.beta, | |
motionZ: responder.rotation.gamma | |
}) | |
}); | |
} | |
}); | |
} | |
componentDidUpdate(prevProps, prevState) { | |
// limits parallax tilt | |
const rotateValue = (motion) => { | |
let limit = motion * 100; | |
if (Math.abs(limit) > 20) // limit to 20deg | |
limit = limit > 0 ? 20 : -20 | |
return Math.floor(limit); | |
} | |
// update animation values | |
const imgRotateXPrev = rotateValue(prevState.motionY / 2); // divide by 2 to limit parallax on X axis | |
const imgRotateYPrev = rotateValue(prevState.motionZ); | |
const imgRotateX = rotateValue(this.state.motionY / 2); | |
const imgRotateY = rotateValue(this.state.motionZ); | |
this.cardTransform.X = this.transformValue.X.interpolate({ inputRange: [0, 1], outputRange: [imgRotateXPrev + 'deg', imgRotateX + 'deg'] }); | |
this.cardTransform.Y = this.transformValue.Y.interpolate({ inputRange: [0, 1], outputRange: [imgRotateYPrev + 'deg', imgRotateY + 'deg'] }); | |
// animation start | |
this.transformValue.X.setValue(0); | |
this.transformValue.Y.setValue(0); | |
Animated.timing(this.transformValue.X, { toValue: 1, duration: 100, easing: Easing.linear, useNativeDriver: true }).start(); | |
Animated.timing(this.transformValue.Y, { toValue: 1, duration: 100, easing: Easing.linear, useNativeDriver: true }).start(); | |
} | |
render() { | |
return ( | |
<View style={imageStyles.container}> | |
<Animated.Image | |
source={require('assets/images/payment.png')} | |
style={[imageStyles.image, { | |
transform: [ | |
{ rotateX: this.cardTransform.X }, | |
{ rotateY: this.cardTransform.Y } | |
] | |
}]} /> | |
</View> | |
) | |
} | |
} | |
const styles = { | |
container: { | |
alignItems: 'center' | |
} | |
} | |
const imageStyles = { | |
container: { | |
flex: 1, | |
marginTop: 20 | |
}, | |
image: { | |
width: '90%', | |
height: '100%', | |
alignSelf: 'center' | |
} | |
} | |
export default AnimatedAnalyticsImage; |
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