/**
* {@inheritdoc}
*/
protected function readGeometryHeader(WKBBuffer $buffer, &$geometryType, &$hasZ, &$hasM, &$srid)
{
$wkbType = $buffer->readUnsignedLong();
$geometryType = $wkbType % 1000;
$dimension = ($wkbType - $geometryType) / 1000;
if ($dimension < 0 || $dimension > 3) {
throw GeometryIOException::unsupportedWKBType($wkbType);
}
$hasZ = $dimension === 1 || $dimension === 3;
$hasM = $dimension === 2 || $dimension === 3;
}
/**
* {@inheritdoc}
*/
protected function readGeometryHeader(WKBBuffer $buffer, &$geometryType, &$hasZ, &$hasM, &$srid)
{
$header = $buffer->readUnsignedLong();
if ($header >= 0 && $header < 4000) {
$geometryType = $header % 1000;
$dimension = ($header - $geometryType) / 1000;
if ($dimension < 0 || $dimension > 3) {
throw GeometryIOException::unsupportedWKBType($header);
}
$hasZ = $dimension === 1 || $dimension === 3;
$hasM = $dimension === 2 || $dimension === 3;
} else {
$geometryType = $header & 0xfff;
$hasZ = ($header & EWKBTools::Z) !== 0;
$hasM = ($header & EWKBTools::M) !== 0;
$hasSRID = ($header & EWKBTools::S) !== 0;
if ($hasSRID) {
$srid = $buffer->readUnsignedLong();
}
}
}
/**
* @param WKBBuffer $buffer
* @param CoordinateSystem $cs
*
* @return Triangle
*/
private function readTriangle(WKBBuffer $buffer, CoordinateSystem $cs)
{
$numRings = $buffer->readUnsignedLong();
$rings = [];
for ($i = 0; $i < $numRings; $i++) {
$rings[] = $this->readLineString($buffer, $cs);
}
return new Triangle($cs, ...$rings);
}
