/usr/include/qgis/qgsgeometryengine.h is in libqgis-dev 2.18.17+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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qgsgeometryengine.h
-------------------------------------------------------------------
Date : 22 Sept 2014
Copyright : (C) 2014 by Marco Hugentobler
email : marco.hugentobler at sourcepole dot com
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#ifndef QGSGEOMETRYENGINE_H
#define QGSGEOMETRYENGINE_H
#include "qgspointv2.h"
#include "qgslinestringv2.h"
#include <QList>
class QgsAbstractGeometryV2;
/** \ingroup core
* \class QgsGeometryEngine
* \brief Contains geometry relation and modification algorithms.
* \note added in QGIS 2.10
* \note this API is not considered stable and may change for 2.12
*/
class CORE_EXPORT QgsGeometryEngine
{
public:
QgsGeometryEngine( const QgsAbstractGeometryV2* geometry ): mGeometry( geometry ) {}
virtual ~QgsGeometryEngine() {}
virtual void geometryChanged() = 0;
virtual void prepareGeometry() = 0;
virtual QgsAbstractGeometryV2* intersection( const QgsAbstractGeometryV2& geom, QString* errorMsg = nullptr ) const = 0;
virtual QgsAbstractGeometryV2* difference( const QgsAbstractGeometryV2& geom, QString* errorMsg = nullptr ) const = 0;
virtual QgsAbstractGeometryV2* combine( const QgsAbstractGeometryV2& geom, QString* errorMsg = nullptr ) const = 0;
virtual QgsAbstractGeometryV2* combine( const QList< QgsAbstractGeometryV2* >&, QString* errorMsg = nullptr ) const = 0;
virtual QgsAbstractGeometryV2* symDifference( const QgsAbstractGeometryV2& geom, QString* errorMsg = nullptr ) const = 0;
virtual QgsAbstractGeometryV2* buffer( double distance, int segments, QString* errorMsg = nullptr ) const = 0;
virtual QgsAbstractGeometryV2* buffer( double distance, int segments, int endCapStyle, int joinStyle, double mitreLimit, QString* errorMsg = nullptr ) const = 0;
virtual QgsAbstractGeometryV2* simplify( double tolerance, QString* errorMsg = nullptr ) const = 0;
virtual QgsAbstractGeometryV2* interpolate( double distance, QString* errorMsg = nullptr ) const = 0;
virtual QgsAbstractGeometryV2* envelope( QString* errorMsg = nullptr ) const = 0;
virtual bool centroid( QgsPointV2& pt, QString* errorMsg = nullptr ) const = 0;
virtual bool pointOnSurface( QgsPointV2& pt, QString* errorMsg = nullptr ) const = 0;
virtual QgsAbstractGeometryV2* convexHull( QString* errorMsg = nullptr ) const = 0;
virtual double distance( const QgsAbstractGeometryV2& geom, QString* errorMsg = nullptr ) const = 0;
virtual bool intersects( const QgsAbstractGeometryV2& geom, QString* errorMsg = nullptr ) const = 0;
virtual bool touches( const QgsAbstractGeometryV2& geom, QString* errorMsg = nullptr ) const = 0;
virtual bool crosses( const QgsAbstractGeometryV2& geom, QString* errorMsg = nullptr ) const = 0;
virtual bool within( const QgsAbstractGeometryV2& geom, QString* errorMsg = nullptr ) const = 0;
virtual bool overlaps( const QgsAbstractGeometryV2& geom, QString* errorMsg = nullptr ) const = 0;
virtual bool contains( const QgsAbstractGeometryV2& geom, QString* errorMsg = nullptr ) const = 0;
virtual bool disjoint( const QgsAbstractGeometryV2& geom, QString* errorMsg = nullptr ) const = 0;
/** Returns the Dimensional Extended 9 Intersection Model (DE-9IM) representation of the
* relationship between the geometries.
* @param geom geometry to relate to
* @param errorMsg destination storage for any error message
* @returns DE-9IM string for relationship, or an empty string if an error occurred
* @note added in QGIS 2.12
*/
virtual QString relate( const QgsAbstractGeometryV2& geom, QString* errorMsg = nullptr ) const = 0;
/** Tests whether two geometries are related by a specified Dimensional Extended 9 Intersection Model (DE-9IM)
* pattern.
* @param geom geometry to relate to
* @param pattern DE-9IM pattern for match
* @param errorMsg destination storage for any error message
* @returns true if geometry relationship matches with pattern
* @note added in QGIS 2.14
*/
virtual bool relatePattern( const QgsAbstractGeometryV2& geom, const QString& pattern, QString* errorMsg = nullptr ) const = 0;
virtual double area( QString* errorMsg = nullptr ) const = 0;
virtual double length( QString* errorMsg = nullptr ) const = 0;
virtual bool isValid( QString* errorMsg = nullptr ) const = 0;
virtual bool isEqual( const QgsAbstractGeometryV2& geom, QString* errorMsg = nullptr ) const = 0;
virtual bool isEmpty( QString* errorMsg ) const = 0;
virtual int splitGeometry( const QgsLineStringV2& splitLine,
QList<QgsAbstractGeometryV2*>& newGeometries,
bool topological,
QgsPointSequenceV2 &topologyTestPoints, QString* errorMsg = nullptr ) const
{
Q_UNUSED( splitLine );
Q_UNUSED( newGeometries );
Q_UNUSED( topological );
Q_UNUSED( topologyTestPoints );
Q_UNUSED( errorMsg );
return 2;
}
virtual QgsAbstractGeometryV2* offsetCurve( double distance, int segments, int joinStyle, double mitreLimit, QString* errorMsg = nullptr ) const = 0;
protected:
const QgsAbstractGeometryV2* mGeometry;
QgsGeometryEngine();
};
#endif // QGSGEOMETRYENGINE_H
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