function draw_line($line, &$params)
{
$ret = "";
$a = explode("(", $line, 2);
while (count($a) < 2) {
$a[] = "";
}
$command = trim(strtolower(array_shift($a)));
$values = trim(str_replace(")", "", array_shift($a)));
if ($command == "addregs" || $command == "include") {
$values = explode(",", $values);
$params->expand_ids($values, $this->id);
foreach ($values as $v) {
$v = $this->fullid($v);
$ng = new geo();
$ng->set_from_id($v, $params);
$ret .= $ng->draw($params);
}
} elseif ($command == "polygon" || $command == "polyline") {
if (!$this->draw_this($params)) {
return $ret;
}
$data = array();
$values = explode(",", $values);
$params->expand_ids($values, $this->id);
foreach ($values as $v) {
$v = $this->fullid($v);
$ng = new geo();
$ng->set_from_id($v, $params);
$b = $ng->get_data($params);
$this->add_reordered_data($data, $b);
}
$style = $this->get_current_style($params);
if ($command == "polygon") {
$ret .= "<polygon {$style} points=\"";
}
if ($command == "polyline") {
$ret .= "<polyline {$style} points=\"";
}
foreach ($data as $a) {
$x = $a[0];
$y = $a[1];
$this->xsum += $x;
$this->ysum += $y;
$this->count++;
$ret .= "{$x},{$y} ";
}
$ret = trim($ret) . "\"/>\n";
}
return $ret;
}
