Created
March 8, 2024 00:11
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update zustand state in useFrame
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import { useFrame } from '@react-three/fiber' | |
import React, { useEffect, useRef } from 'react' | |
import { create } from 'zustand' | |
function AnimateBoxWithZustand() { | |
const useStore = create((set) => ({ | |
position: [0, 0, 0], | |
setPosition: (newPosition) => set(() => ({ position: newPosition })), | |
updatePosition: (time) => | |
set((state) => ({ | |
position: [state.position[0], state.position[1] + Math.sin(time) * 0.001, state.position[2]] | |
})) | |
})) | |
const positionRef = useRef(useStore.getState().position) | |
const meshRef = useRef() | |
useEffect(() => { | |
const unsubscribe = useStore.subscribe((state) => { | |
positionRef.current = state.position | |
}) | |
return () => { | |
unsubscribe() | |
} | |
}, []) | |
useFrame(({ clock }) => { | |
const elapsedTime = clock.getElapsedTime() | |
// console.log('posBefore', positionRef.current) | |
useStore.getState().updatePosition(elapsedTime) | |
// console.log('posAfter', positionRef.current) | |
if (meshRef.current) { | |
meshRef.current.position.set(...positionRef.current) | |
} | |
}) | |
return ( | |
<mesh ref={meshRef}> | |
<boxGeometry /> | |
<meshMatcapMaterial /> | |
</mesh> | |
) | |
} | |
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