abs = (out, vector) => {
  out[0] = Math.abs(vector[0])
  out[1] = Math.abs(vector[1])
  return out
}
Calculates the absolute coordinates of the given vector.

@param {vec2} out - receiving vector
@param {vec2} vector - vector of reference
@returns {vec2} out
@alias module:modeling/maths/vec2.abs