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Breaking changes in 1.0.0.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,185 @@ | ||
| // Inpsired by | ||
| // https://engineering.shopify.com/blogs/engineering/building-arrives-confetti-in-react-native-with-reanimated | ||
| // https://dev.to/hrastnik/implementing-gravity-and-collision-detection-in-react-native-2hk5 | ||
|
|
||
| import React, { useEffect, useMemo } from 'react' | ||
| import Animated from 'react-native-reanimated' | ||
| import {View, Dimensions, StyleSheet} from 'react-native' | ||
|
|
||
| const { | ||
| View: ReanimatedView, | ||
| Clock, | ||
| Value, | ||
| useCode, | ||
| block, | ||
| startClock, | ||
| stopClock, | ||
| set, | ||
| add, | ||
| sub, | ||
| divide, | ||
| diff, | ||
| multiply, | ||
| cond, | ||
| clockRunning, | ||
| greaterThan, | ||
| lessThan, | ||
| lessOrEq, | ||
| eq, | ||
| } = Animated; | ||
|
|
||
| const Confetti = props => { | ||
| const [containerDims, setContainerDims] = React.useState(Dimensions.get('screen')); | ||
| const [confetti, setConfetti] = React.useState(createConfetti(containerDims)); | ||
| const clock = new Clock(); | ||
|
|
||
| useEffect(() => { | ||
| return () => { // func indicates unmount | ||
| stopClock(clock); | ||
| setConfetti([]); | ||
| } | ||
| }, []); | ||
|
|
||
| // Update confetti positioning if screen changes (e.g. rotation) | ||
| const onLayout = (event => { | ||
| setContainerDims({ | ||
| width: event.nativeEvent.layout.width, | ||
| height: event.nativeEvent.layout.height, | ||
| }); | ||
| }); | ||
|
|
||
| function createConfetti(dimensions) { | ||
| return useMemo(() => { | ||
| const { width, height } = dimensions; | ||
| // Adapt velocity props | ||
| const xVelMax = props.horizSpeed * 8; | ||
| const yVelMax = props.fallSpeed * 3; | ||
| const angleVelMax = props.flipSpeed; | ||
|
|
||
| return [...new Array(props.numItems)].map((_, index) => { | ||
| return { | ||
| index, | ||
| // Spawn confetti from two different sources, a quarter | ||
| // from the left and a quarter from the right edge of the screen. | ||
| x: new Value( | ||
| width * (index % 2 ? 0.25 : 0.75) - props.itemDimensions.width / 2 | ||
| ), | ||
| y: new Value(-props.itemDimensions.height * 2), | ||
| angle: new Value(0), | ||
| xVel: new Value(Math.random() * xVelMax - (xVelMax / 2)), | ||
| yVel: new Value(Math.random() * yVelMax + yVelMax), | ||
| angleVel: new Value((Math.random() * angleVelMax - (angleVelMax / 2)) * Math.PI), | ||
| delay: new Value(Math.floor(index / 10) * 0.3), | ||
| elasticity: Math.random() * 0.9 + 0.1, | ||
| color: props.itemColors[index % props.itemColors.length], | ||
| } | ||
| }) | ||
| return confetti; | ||
| }, [dimensions]); | ||
| } | ||
|
|
||
| const useDraw = _confetti => { | ||
| const nativeCode = useMemo(() => { | ||
| const timeDiff = diff(clock); | ||
| const nativeCode = _confetti.map(({ | ||
| x, | ||
| y, | ||
| angle, | ||
| xVel, | ||
| yVel, | ||
| angleVel, | ||
| color, | ||
| elasticity, | ||
| delay, | ||
| }) => { | ||
| const dt = divide(timeDiff, 1000) | ||
| const dy = multiply(dt, yVel) | ||
| const dx = multiply(dt, xVel) | ||
| const dAngle = multiply(dt, angleVel) | ||
|
|
||
| return [ | ||
| cond( | ||
| lessOrEq(y, containerDims.height + props.itemDimensions.height), | ||
| cond( | ||
| greaterThan(delay, 0), | ||
| [set(delay, sub(delay, dt))], | ||
| [ | ||
| set(y, add(y, dy)), | ||
| set(x, add(x, dx)), | ||
| set(angle, add(angle, dAngle)), | ||
| ] | ||
| ) | ||
| ), | ||
| cond(greaterThan(x, containerDims.width - props.itemDimensions.width), [ | ||
| set(x, containerDims.width - props.itemDimensions.width), | ||
| set(xVel, multiply(xVel, -elasticity)), | ||
| ]), | ||
| cond(lessThan(x, 0), [ | ||
| set(x, 0), | ||
| set(xVel, multiply(xVel, -elasticity)), | ||
| ]), | ||
| cond( | ||
| eq(props.continuous, true), | ||
| cond( | ||
| greaterThan(y, containerDims.height + props.itemDimensions.height), | ||
| set(y, -props.itemDimensions.height * 2), | ||
| ) | ||
| ), | ||
| ]; | ||
| }); | ||
|
|
||
| nativeCode.push(cond(clockRunning(clock), 0, startClock(clock)), clock); | ||
| return block(nativeCode); | ||
| }, [_confetti]); | ||
|
|
||
| useCode(() => nativeCode, [nativeCode]); | ||
| }; | ||
|
|
||
| useDraw(confetti); | ||
|
|
||
| return ( | ||
| <View pointerEvents="none" style={StyleSheet.absoluteFill} onLayout={this.onLayout}> | ||
| {confetti.map( | ||
| ({ index, x, y, angle, color: backgroundColor }) => { | ||
| return ( | ||
| <ReanimatedView | ||
| key={index} | ||
| style={[ | ||
| styles.animContainer, | ||
| props.itemDimensions, | ||
| { transform: [ | ||
| {translateX: x}, | ||
| {translateY: y}, | ||
| {rotate: angle}, | ||
| {rotateX: angle}, | ||
| {rotateY: angle}, | ||
| ]}, | ||
| ]} | ||
| > | ||
| { props.itemComponent } | ||
| <View style={[{ backgroundColor }, props.itemDimensions, styles.confettiContainer]} opacity={props.itemTintStrength}/> | ||
| </ReanimatedView> | ||
| ) | ||
| } | ||
| )} | ||
| </View> | ||
| ) | ||
| } | ||
|
|
||
| const styles = StyleSheet.create({ | ||
| animContainer: { | ||
| position: 'absolute', | ||
| top: 0, | ||
| left: 0, | ||
| alignItems: 'center', | ||
| justifyContent: 'center', | ||
| overflow: 'hidden', | ||
| }, | ||
| confettiContainer: { | ||
| position: 'absolute', | ||
| top: 0, | ||
| left: 0, | ||
| } | ||
| }) | ||
|
|
||
| export default Confetti |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,29 @@ | ||
| import React from 'react'; | ||
| import { View } from 'react-native'; | ||
| import MakeItRain from './makeItRain'; | ||
| import Confetti from './confetti'; | ||
|
|
||
| function Root(props) { | ||
| const itemComponent = props.itemComponent || <View style={props.itemDimensions}/>; | ||
|
|
||
| return ( props.flavor === "arrive" ? | ||
| <Confetti {...props} itemComponent={itemComponent}/> | ||
| : | ||
| <MakeItRain {...props} itemComponent={itemComponent}/> | ||
| ); | ||
| } | ||
|
|
||
| Root.defaultProps = { | ||
| numItems: 100, | ||
| itemDimensions: { width: 20, height: 10 }, | ||
| itemColors: ['#00e4b2', '#09aec5', '#107ed5'], | ||
| itemTintStrength: 1.0, | ||
| flavor: "arrive", | ||
| fallSpeed: 50, | ||
| flipSpeed: 3, | ||
| horizSpeed: 50, | ||
| wiggleRoom: 50, | ||
| continuous: true, | ||
| }; | ||
|
|
||
| export default Root; |
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