melder/vendor/Shapefile/Geometry/MultiPolygon.php
2024-03-13 12:03:56 +01:00

441 lines
15 KiB
PHP

<?php
/**
* PHP Shapefile - PHP library to read and write ESRI Shapefiles, compatible with WKT and GeoJSON
*
* @package Shapefile
* @author Gaspare Sganga
* @version 4.0.0dev
* @license MIT
* @link https://gasparesganga.com/labs/php-shapefile/
*/
namespace Shapefile\Geometry;
use Shapefile\Shapefile;
use Shapefile\ShapefileException;
/**
* MultiPolygon Geometry.
*
* - Array: [
* [numparts] => int
* [parts] => [
* [
* [numrings] => int
* [rings] => [
* [
* [numpoints] => int
* [points] => [
* [
* [x] => float
* [y] => float
* [z] => float
* [m] => float/bool
* ]
* ]
* ]
* ]
* ]
* ]
* ]
*
* - WKT:
* MULTIPOLYGON [Z][M] (((x y z m, x y z m, x y z m, x y z m), (x y z m, x y z m, x y z m)), ((x y z m, x y z m, x y z m, x y z m), (x y z m, x y z m, x y z m)))
*
* - GeoJSON:
* {
* "type": "MultiPolygon" / "MultiPolygonM"
* "coordinates": [
* [
* [
* [x, y, z] / [x, y, m] / [x, y, z, m]
* ]
* ]
* ]
* }
*/
class MultiPolygon extends GeometryCollection
{
/**
* WKT and GeoJSON basetypes, collection class type
*/
const WKT_BASETYPE = 'MULTIPOLYGON';
const GEOJSON_BASETYPE = 'MultiPolygon';
const COLLECTION_CLASS = 'Polygon';
/**
* @var int Action to perform on polygons rings.
*/
private $closed_rings;
/**
* @var int Orientation to force for polygons rings.
*/
private $force_orientation;
/////////////////////////////// PUBLIC ///////////////////////////////
/**
* Constructor.
*
* @param \Shapefile\Geometry\Polygon[] $polygons Optional array of polygons to initialize the multipolygon.
* @param int $closed_rings Optional action to perform on polygons rings. Possible values:
* - Shapefile::ACTION_IGNORE
* - Shapefile::ACTION_CHECK
* - Shapefile::ACTION_FORCE
* @param int $force_orientation Optional orientation to force for polygons rings. Possible values:
* - Shapefile::ORIENTATION_CLOCKWISE
* - Shapefile::ORIENTATION_COUNTERCLOCKWISE
* - Shapefile::ORIENTATION_UNCHANGED
*/
public function __construct(array $polygons = null, $closed_rings = Shapefile::ACTION_CHECK, $force_orientation = Shapefile::ORIENTATION_COUNTERCLOCKWISE)
{
$this->closed_rings = $closed_rings;
$this->force_orientation = $force_orientation;
parent::__construct($polygons);
}
public function initFromArray($array)
{
$this->checkInit();
if (!isset($array['parts']) || !is_array($array['parts'])) {
throw new ShapefileException(Shapefile::ERR_INPUT_ARRAY_NOT_VALID);
}
foreach ($array['parts'] as $part) {
if (!isset($part['rings']) || !is_array($part['rings'])) {
throw new ShapefileException(Shapefile::ERR_INPUT_ARRAY_NOT_VALID);
}
$Polygon = new Polygon(null, $this->closed_rings, $this->force_orientation);
foreach ($part['rings'] as $part) {
if (!isset($part['points']) || !is_array($part['points'])) {
throw new ShapefileException(Shapefile::ERR_INPUT_ARRAY_NOT_VALID);
}
$Linestring = new Linestring();
foreach ($part['points'] as $coordinates) {
$Point = new Point();
$Point->initFromArray($coordinates);
$Linestring->addPoint($Point);
}
$Polygon->addLinestring($Linestring);
}
$this->addGeometry($Polygon, false);
}
return $this;
}
public function initFromWKT($wkt)
{
$this->checkInit();
$wkt = $this->wktSanitize($wkt);
if (!$this->wktIsEmpty($wkt)) {
$force_z = $this->wktIsZ($wkt);
$force_m = $this->wktIsM($wkt);
foreach (explode(')),((', substr($this->wktExtractData($wkt), 2, -2)) as $part) {
$Polygon = new Polygon(null, $this->closed_rings, $this->force_orientation);
foreach (explode('),(', $part) as $ring) {
$Linestring = new Linestring();
foreach (explode(',', $ring) as $wkt_coordinates) {
$coordinates = $this->wktParseCoordinates($wkt_coordinates, $force_z, $force_m);
$Point = new Point($coordinates['x'], $coordinates['y'], $coordinates['z'], $coordinates['m']);
$Linestring->addPoint($Point);
}
$Polygon->addLinestring($Linestring);
}
$this->addGeometry($Polygon, false);
}
}
return $this;
}
public function initFromGeoJSON($geojson)
{
$this->checkInit();
$geojson = $this->geojsonSanitize($geojson);
if ($geojson !== null) {
foreach ($geojson['coordinates'] as $part) {
if (!is_array($part)) {
throw new ShapefileException(Shapefile::ERR_INPUT_GEOJSON_NOT_VALID, 'Wrong coordinates format');
}
$Polygon = new Polygon(null, $this->closed_rings, $this->force_orientation);
foreach ($part as $ring) {
if (!is_array($ring)) {
throw new ShapefileException(Shapefile::ERR_INPUT_GEOJSON_NOT_VALID, 'Wrong coordinates format');
}
$Linestring = new Linestring();
foreach ($ring as $geojson_coordinates) {
$coordinates = $this->geojsonParseCoordinates($geojson_coordinates, $geojson['flag_m']);
$Point = new Point($coordinates['x'], $coordinates['y'], $coordinates['z'], $coordinates['m']);
$Linestring->addPoint($Point);
}
$Polygon->addLinestring($Linestring);
}
$this->addGeometry($Polygon, false);
}
}
return $this;
}
public function getArray()
{
$parts = [];
foreach ($this->getPolygons() as $Polygon) {
$parts[] = $Polygon->getArray();
}
return [
'numparts' => $this->getNumGeometries(),
'parts' => $parts,
];
}
public function getWKT()
{
$ret = $this->wktInitializeOutput();
if (!$this->isEmpty()) {
$parts = [];
foreach ($this->getPolygons() as $Polygon) {
$rings = [];
foreach ($Polygon->getLinestrings() as $Linestring) {
$points = [];
foreach ($Linestring->getPoints() as $Point) {
$points[] = implode(' ', $Point->getRawArray());
}
$rings[] = '(' . implode(', ', $points) . ')';
}
$parts[] = '(' . implode(', ', $rings) . ')';
}
$ret .= '(' . implode(', ', $parts) . ')';
}
return $ret;
}
public function getGeoJSON($flag_bbox = true, $flag_feature = false)
{
if ($this->isEmpty()) {
return 'null';
}
$coordinates = [];
foreach ($this->getPolygons() as $Polygon) {
$parts = [];
foreach ($Polygon->getLinestrings() as $Linestring) {
$rings = [];
foreach ($Linestring->getPoints() as $Point) {
$rings[] = $Point->getRawArray();
}
$parts[] = $rings;
}
$coordinates[] = $parts;
}
return $this->geojsonPackOutput($coordinates, $flag_bbox, $flag_feature);
}
/**
* Adds a polygon to the collection.
*
* @param \Shapefile\Geometry\Polygon $Polygon
*
* @return self Returns $this to provide a fluent interface.
*/
public function addPolygon(Polygon $Polygon)
{
$this->addGeometry($Polygon, true);
return $this;
}
/**
* Gets a polygon at specified index from the collection.
*
* @param int $index The index of the polygon.
*
* @return \Shapefile\Geometry\Polygon
*/
public function getPolygon($index)
{
return $this->getGeometry($index);
}
/**
* Gets all the polygons in the collection.
*
* @return \Shapefile\Geometry\Polygon[]
*/
public function getPolygons()
{
return $this->getGeometries();
}
/**
* Gets the number of polygons in the collection.
*
* @return int
*/
public function getNumPolygons()
{
return $this->getNumGeometries();
}
/**
* Forces multipolygon rings to be closed.
*
* @return self Returns $this to provide a fluent interface.
*/
public function forceClosedRings()
{
foreach ($this->getPolygons() as $Polygon) {
$Polygon->forceClosedRings();
}
return $this;
}
/**
* Checks whether all multipolygon outer rings have a clockwise orientation and all the inner rings have a counterclockwise one.
* Note that a false return value does not guarantee multipolygon is strictly counterclockwise. Use MultiPolygon::forceCounterClockwise() to enforce that!
*
* Returns Shapefile::UNDEFINED if geometry is empty.
*
* @return bool|Shapefile::UNDEFINED
*/
public function isClockwise()
{
if ($this->isEmpty()) {
return Shapefile::UNDEFINED;
}
foreach ($this->getPolygons() as $Polygon) {
if ($Polygon->getOuterRing()->isClockwise(true) === false) {
return false;
}
foreach ($Polygon->getInnerRings() as $Linestring) {
if ($Linestring->isClockwise(true) === true) {
return false;
}
}
}
return true;
}
/**
* Checks whether all multipolygon outer rings have a counterclockwise orientation and all the inner rings have a clockwise one.
* Note that a false return value does not guarantee multipolygon is strictly clockwise. Use MultiPolygon::forceClockwise() to enforce that!
*
* Returns Shapefile::UNDEFINED if geometry is empty.
*
* @return bool|Shapefile::UNDEFINED
*/
public function isCounterClockwise()
{
if ($this->isEmpty()) {
return Shapefile::UNDEFINED;
}
foreach ($this->getPolygons() as $Polygon) {
if ($Polygon->getOuterRing()->isClockwise(true) === true) {
return false;
}
foreach ($Polygon->getInnerRings() as $Linestring) {
if ($Linestring->isClockwise(true) === false) {
return false;
}
}
}
return true;
}
/**
* Forces all multipolygon outer rings to have a clockwise orientation and all the inner rings to have a counterclockwise one.
*
* @return self Returns $this to provide a fluent interface.
*/
public function forceClockwise()
{
foreach ($this->getPolygons() as $Polygon) {
$Polygon->getOuterRing()->forceClockwise();
foreach ($Polygon->getInnerRings() as $Linestring) {
$Linestring->forceCounterClockwise();
}
}
return $this;
}
/**
* Forces all multipolygon outer rings to have a counterclockwise orientation and all the inner rings to have a clockwise one.
*
* @return self Returns $this to provide a fluent interface.
*/
public function forceCounterClockwise()
{
foreach ($this->getPolygons() as $Polygon) {
$Polygon->getOuterRing()->forceCounterClockwise();
foreach ($Polygon->getInnerRings() as $Linestring) {
$Linestring->forceClockwise();
}
}
return $this;
}
public function getSHPBasetype()
{
return Shapefile::SHAPE_TYPE_POLYGON;
}
/////////////////////////////// PROTECTED ///////////////////////////////
/**
* Enforces class-wide action and orientation for polygons rings.
*
* @param \Shapefile\Geometry\Geometry $Polygon
* @param bool $flag_rings_and_orientation Optionally enforce class action and orientation for rings.
*
* @return self Returns $this to provide a fluent interface.
*/
protected function addGeometry(Geometry $Polygon, $flag_rings_and_orientation = true)
{
parent::addGeometry($Polygon);
if ($flag_rings_and_orientation && ($this->closed_rings != Shapefile::ACTION_IGNORE || $this->force_orientation != Shapefile::ORIENTATION_UNCHANGED)) {
foreach ($Polygon->getRings() as $i => $Linestring) {
// Closed rings
if ($this->closed_rings == Shapefile::ACTION_FORCE) {
$Linestring->forceClosedRing();
} elseif ($this->closed_rings == Shapefile::ACTION_CHECK && !$Linestring->isClosedRing()) {
throw new ShapefileException(Shapefile::ERR_GEOM_POLYGON_OPEN_RING);
}
// Orientation
if ($this->force_orientation == Shapefile::ORIENTATION_CLOCKWISE) {
$Linestring->{($i == 0) ? 'forceClockwise' : 'forceCounterClockwise'}();
} elseif ($this->force_orientation == Shapefile::ORIENTATION_COUNTERCLOCKWISE) {
$Linestring->{($i == 0) ? 'forceCounterClockwise' : 'forceClockwise'}();
}
}
}
return $this;
}
protected function getWKTBasetype()
{
return static::WKT_BASETYPE;
}
protected function getGeoJSONBasetype()
{
return static::GEOJSON_BASETYPE;
}
protected function getCollectionClass()
{
return __NAMESPACE__ . '\\' . static::COLLECTION_CLASS;
}
}