CheckOrdinatesFilter.h
/**********************************************************************
*
* GEOS - Geometry Engine Open Source
* http://geos.osgeo.org
*
* Copyright (C) 2022 ISciences LLC
*
* This is free software; you can redistribute and/or modify it under
* the terms of the GNU Lesser General Public Licence as published
* by the Free Software Foundation.
* See the COPYING file for more information.
*
**********************************************************************/
#pragma once
#include <geos/geom/Coordinate.h>
#include <geos/geom/CoordinateSequence.h>
#include <geos/geom/CoordinateSequenceFilter.h>
#include <geos/io/OrdinateSet.h>
namespace geos {
namespace io {
class CheckOrdinatesFilter : public geom::CoordinateSequenceFilter {
public:
CheckOrdinatesFilter(OrdinateSet checkOrdinateFlags) :
m_checkFlags(checkOrdinateFlags),
m_foundFlags(OrdinateSet::createXY())
{}
void filter_ro(const geom::CoordinateSequence& seq, std::size_t i) override {
bool checkZ = m_checkFlags.hasZ() && !m_foundFlags.hasZ();
bool checkM = m_checkFlags.hasM() && !m_foundFlags.hasM();
if (checkZ || checkM) {
seq.getAt(i, m_coord);
if (checkZ && !std::isnan(m_coord.z)) {
m_foundFlags.setZ(true);
}
if (checkM && !std::isnan(m_coord.m)) {
m_foundFlags.setM(true);
}
}
}
bool isGeometryChanged() const override {
return false;
}
bool isDone() const override {
return m_checkFlags == m_foundFlags;
}
OrdinateSet getFoundOrdinates() const {
return m_foundFlags;
}
private:
OrdinateSet m_checkFlags;
OrdinateSet m_foundFlags;
geom::CoordinateXYZM m_coord;
};
}
}
geos::geom::CoordinateSequenceFilter::isDone
virtual bool isDone() const =0
Reports whether the application of this filter can be terminated.
geos::geom::CoordinateSequenceFilter::isGeometryChanged
virtual bool isGeometryChanged() const =0
Reports whether the execution of this filter has modified the coordinates of the geometry.
geos::io
Contains the interfaces for converting JTS objects to and from other formats.
Definition Geometry.h:65
geos
Basic namespace for all GEOS functionalities.
Definition geos.h:38