function _getSphereSliceRadiusRange(center, radius, zMin, zMax) {
  const dzMin = zMin - center.z
  const dzMax = zMax - center.z
  const rzMin = Math.sqrt(Math.max(radius * radius - dzMin * dzMin, 0.0))
  const rzMax = Math.sqrt(Math.max(radius * radius - dzMax * dzMax, 0.0))