useEdgeSplit

This hook mutates a mesh geometry using three's Edge Split modifier. The first parameter is the cut-off angle, and the second parameter is a tryKeepNormals flag (default true).

const meshRef = useEdgeSplit(Math.PI / 2)

return (
  <mesh ref={meshRef}>
    <boxBufferGeometry args={[10, 10]} />
  </mesh>
)