function ceil(out, a) {
  out[0] = Math.ceil(a[0]);
  out[1] = Math.ceil(a[1]);
  out[2] = Math.ceil(a[2]);
  return out;
}
function ceil(out, a) {
  out[0] = Math.ceil(a[0]);
  out[1] = Math.ceil(a[1]);
  out[2] = Math.ceil(a[2]);
  return out;
}
function ceil ( out , a ) { out [ 0 ] = Math . ceil ( a [ 0 ] ) ; out [ 1 ] = Math . ceil ( a [ 1 ] ) ; out [ 2 ] = Math . ceil ( a [ 2 ] ) ; return out ; }
Math.ceil the components of a vec3

@param {vec3} out the receiving vector
@param {vec3} a vector to ceil
@returns {vec3} out
Math . ceil the components of a vec3