/**
* {@inheritdoc}
*/
public function coordinateSystem()
{
if ($this->proxyGeometry === null) {
$this->load();
}
return $this->proxyGeometry->coordinateSystem();
}
/**
* Creates a rectangle out of two 2D corner points.
*
* The result is a linear ring (closed and simple).
*
* @param Point $a
* @param Point $b
*
* @return LineString
*
* @throws CoordinateSystemException If the points use different coordinate systems, or are not 2D.
*/
public static function rectangle(Point $a, Point $b)
{
$cs = $a->coordinateSystem();
if ($cs != $b->coordinateSystem()) {
// by-value comparison.
throw CoordinateSystemException::dimensionalityMix($a, $b);
}
if ($cs->coordinateDimension() != 2) {
throw new CoordinateSystemException(__METHOD__ . ' expects 2D points.');
}
$x1 = min($a->x(), $b->x());
$x2 = max($a->x(), $b->x());
$y1 = min($a->y(), $b->y());
$y2 = max($a->y(), $b->y());
$p1 = new Point($cs, $x1, $y1);
$p2 = new Point($cs, $x2, $y1);
$p3 = new Point($cs, $x2, $y2);
$p4 = new Point($cs, $x1, $y2);
return new LineString($cs, $p1, $p2, $p3, $p4, $p1);
}
/**
* Creates a non-empty CircularString composed of the given points.
*
* @param Point $point1 The first point.
* @param Point ...$pointN The subsequent points.
*
* @return CircularString
*
* @throws InvalidGeometryException If the number of points is invalid.
* @throws CoordinateSystemException If the points use different coordinate systems.
*/
public static function of(Point $point1, Point ...$pointN)
{
return new CircularString($point1->coordinateSystem(), $point1, ...$pointN);
}