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| import { Canvas, Rect } from '@shopify/react-native-skia'; | |
| import React, { useEffect, useRef } from 'react'; | |
| import { Dimensions, StyleSheet } from 'react-native'; | |
| import { DerivedValue, Easing, useDerivedValue, useSharedValue, withRepeat, withTiming } from 'react-native-reanimated'; | |
| const squares = Array.from(Array(100).keys()); | |
| const screenWidth = Dimensions.get('screen').width; | |
| const screenHeight = Dimensions.get('screen').height; | |
| function Square({transform}: {transform: DerivedValue<{ | |
| rotate: number; | |
| }[]>}) { | |
| const position = useRef({x: Math.random() * screenWidth, y: Math.random() * screenHeight}); | |
| return ( | |
| <Rect | |
| transform={transform} | |
| x={position.current.x} | |
| y={position.current.y} | |
| origin={{x: position.current.x + 25, y: position.current.y + 25}} | |
| height={50} | |
| width={50} | |
| color={'red'} | |
| /> | |
| ); | |
| } | |
| function App(): React.JSX.Element { | |
| const rotationSharedValue = useSharedValue(0); | |
| useEffect(() => { | |
| rotationSharedValue.value = withRepeat( | |
| withTiming(-360, {duration: 4000, easing: Easing.linear}), | |
| -1 | |
| ); | |
| }, [rotationSharedValue]); | |
| const transform = useDerivedValue( | |
| () => [{rotate: rotationSharedValue.value}], | |
| [rotationSharedValue], | |
| ); | |
| return ( | |
| <Canvas style={styles.safeAreaView}> | |
| { | |
| squares.map((_, index) => { | |
| return <Square key={index} transform={transform} />; | |
| }) | |
| } | |
| </Canvas> | |
| ); | |
| } | |
| const styles = StyleSheet.create({ | |
| safeAreaView: { | |
| flex: 1, | |
| }, | |
| }); | |
| export default App; |
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