Updating specific instanced bodies

[nedcrow]

I want object pooling.

I want hide or replace one box in instanced mehes.

Please tip or example code.

Ref is :
https://codesandbox.io/embed/r3f-cannon-instanced-physics-g1s88?codemirror=1

[codynova]

You can use the index of the instanced body to refer to it in the API:

const NUMBER_OF_BOXES = 10
const BODY_INDEX = 4

const [ref, api] = useBox(() => ({
  mass: 1,
  args: [0.05, 0.05, 0.05],
  position: [Math.random() - 0.5, Math.random() * 2, Math.random() - 0.5],
}))

useFrame(() => api.at(BODY_INDEX).position.set(1, 1, 1))

return (
  <instancedMesh ref={ref} args={[null, null, NUMBER_OF_BOXES]}>

[nedcrow]

Thank you! I'll try it!