La classe "\fire\gear\geom\LinearRing" consente di creare e gestire un anello.
Source code:
include("fxcore.php");
$precisionModel = new \fire\gear\geom\PrecisionModel(6);
echo "precision model maximum significant digits: " . $precisionModel->getMaximumSignificantDigits() . "\n";
$srid = 3003;
$coordinate0 = new \fire\gear\geom\Coordinate(0, 0);
$coordinate1 = new \fire\gear\geom\Coordinate(1.1, 1.1);
$coordinate2 = new \fire\gear\geom\Coordinate(2.2, 2.2, 2.2);
$linearRing = new \fire\gear\geom\LinearRing($precisionModel, $srid);
$linearRing->addCoordinate($coordinate0);
$linearRing->addCoordinate($coordinate1);
$linearRing->addCoordinate($coordinate2);
$linearRing->addCoordinate($coordinate0);
echo "linear ring: " . $linearRing->toString() . "\n";