/**
* {@inheritdoc}
*/
public function coordinateSystem()
{
if ($this->proxyGeometry === null) {
$this->load();
}
return $this->proxyGeometry->coordinateSystem();
}
/**
* {@inheritdoc}
*
* @throws UnexpectedGeometryException If the patches are not triangles.
*/
public function __construct(CoordinateSystem $cs, Polygon ...$patches)
{
parent::__construct($cs, ...$patches);
foreach ($patches as $patch) {
if (!$patch instanceof Triangle) {
throw new UnexpectedGeometryException('The patches in a TIN must be triangles.');
}
}
}
/**
* Tests Countable and Traversable interfaces.
*/
public function testInterfaces()
{
$polyhedralSurface = PolyhedralSurface::fromText('POLYHEDRALSURFACE(((0 0, 0 1, 1 1, 1 0, 0 0)), ((1 0, 1 1, 2 1, 2 0, 1 0)), ((2 0, 2 1, 3 1, 3 0, 2 0)))');
$this->assertInstanceOf(\Countable::class, $polyhedralSurface);
$this->assertSame(3, count($polyhedralSurface));
$this->assertInstanceOf(\Traversable::class, $polyhedralSurface);
$this->assertSame([$polyhedralSurface->patchN(1), $polyhedralSurface->patchN(2), $polyhedralSurface->patchN(3)], iterator_to_array($polyhedralSurface));
}
