@takram/three-atmosphere/src/StarsGeometry.ts

A Three.js and R3F implementation of Precomputed Atmospheric Scattering

import {
  BufferGeometry,
  InterleavedBuffer,
  InterleavedBufferAttribute,
  Sphere,
  Vector3
} from 'three'

export class StarsGeometry extends BufferGeometry {
  constructor(data: ArrayBuffer) {
    super()
    const int16Array = new Int16Array(data)
    const uint8Array = new Uint8Array(data)
    const int16Buffer = new InterleavedBuffer(int16Array, 5)
    const uint8Buffer = new InterleavedBuffer(uint8Array, 10)
    this.setAttribute(
      'position',
      new InterleavedBufferAttribute(int16Buffer, 3, 0, true)
    )
    this.setAttribute(
      'magnitude',
      new InterleavedBufferAttribute(uint8Buffer, 1, 6, true)
    )
    this.setAttribute(
      'color',
      new InterleavedBufferAttribute(uint8Buffer, 3, 7, true)
    )
    this.boundingSphere = new Sphere(new Vector3(), 1)
  }
}