reverse = (out, line) => {
  const point = vec3.clone(line[0])
  const direction = vec3.negate(vec3.create(), line[1])
  return fromPointAndDirection(out, point, direction)
}
Create a line in the opposite direction as the given.

@param {line3} out - receiving line
@param {line3} line - line to reverse
@returns {line3} out
@alias module:modeling/maths/line3.reverse