/**
* Rounds the specified 3d vector integer values.
* Can handle/return a string vector, or an array vector.
* (Output type matches input type).
* @param mixed $pos Either a string vector or an array vector
* @return mixed
*/
function sloodle_round_vector($pos)
{
// We will work with an array, but allow for conversion to/from string
$arrayvec = $pos;
$returnstring = FALSE;
// Is it a string?
if (is_string($pos)) {
$arrayvec = sloodle_vector_to_array($pos);
$returnstring = TRUE;
} else {
if (!is_array($pos)) {
return $pos;
}
}
// Construct an output array
$output = array();
foreach ($arrayvec as $key => $val) {
$output[$key] = round($val, 0);
}
// If we need to convert it back to a string, then do so
if ($returnstring) {
return sloodle_array_to_vector($output);
}
return $output;
}
/**
* Finds the user identified by LoginZone allocation, and loads it into the given user object.
* Note: does not delete the allocation.
* @param string $pos Absolute position vector (relative to sim, not to LoginZone)
* @param SloodleUser &$user The user object which will be manipulated (by reference)
* @return bool True if successful, or false otherwise
*/
function load_user_by_loginzone($pos, &$user)
{
// Calculate the relative position of the allocation
$abspos = sloodle_vector_to_array($pos);
$loginzonepos = sloodle_vector_to_array($this->sloodle_course_data->loginzonepos);
$relpos = array('x' => $abspos['x'] - $loginzonepos['x'], 'y' => $abspos['y'] - $loginzonepos['y'], 'z' => $abspos['z'] - $loginzonepos['z']);
$relpos = sloodle_array_to_vector($relpos);
// Attempt to find a matching LoginZone position in the database
$rec = get_record('sloodle_loginzone_allocation', 'course', $this->get_course_id(), 'position', $relpos);
if (!$rec) {
return false;
}
// Load the user
return $user->load_user($rec->userid);
}
