QGIS API Documentation 3.39.0-Master (be2050b798e)
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qgssurface.cpp
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1/***************************************************************************
2 qgscurvepolygon.cpp
3 ---------------------
4 begin : August 2017
5 copyright : (C) 2017 by Martí Angelats i Ribera
6 email : marti dot angelats at psig dot cat
7 ***************************************************************************/
8
9/***************************************************************************
10 * *
11 * This program is free software; you can redistribute it and/or modify *
12 * it under the terms of the GNU General Public License as published by *
13 * the Free Software Foundation; either version 2 of the License, or *
14 * (at your option) any later version. *
15 * *
16 ***************************************************************************/
17
18#include "qgssurface.h"
19#include "qgspoint.h"
20#include "qgspolygon.h"
21#include "qgsgeos.h"
22#include <memory>
23
24bool QgsSurface::isValid( QString &error, Qgis::GeometryValidityFlags flags ) const
25{
26 if ( flags == 0 && mHasCachedValidity )
27 {
28 // use cached validity results
30 return error.isEmpty();
31 }
32
33 const QgsGeos geos( this );
34 const bool res = geos.isValid( &error, flags & Qgis::GeometryValidityFlag::AllowSelfTouchingHoles, nullptr );
35 if ( flags == 0 )
36 {
37 mValidityFailureReason = !res ? error : QString();
38 mHasCachedValidity = true;
39 }
40 return res;
41}
42
@ AllowSelfTouchingHoles
Indicates that self-touching holes are permitted. OGC validity states that self-touching holes are NO...
QFlags< GeometryValidityFlag > GeometryValidityFlags
Geometry validity flags.
Definition qgis.h:1825
virtual void clearCache() const
Clears any cached parameters associated with the geometry, e.g., bounding boxes.
A 3-dimensional box composed of x, y, z coordinates.
Definition qgsbox3d.h:43
Does vector analysis using the geos library and handles import, export, exception handling*.
Definition qgsgeos.h:137
QgsBox3D mBoundingBox
Definition qgssurface.h:80
void clearCache() const override
Clears any cached parameters associated with the geometry, e.g., bounding boxes.
QString mValidityFailureReason
Definition qgssurface.h:82
bool mHasCachedValidity
Definition qgssurface.h:81
bool isValid(QString &error, Qgis::GeometryValidityFlags flags=Qgis::GeometryValidityFlags()) const override
Checks validity of the geometry, and returns true if the geometry is valid.
Contains geos related utilities and functions.
Definition qgsgeos.h:75