QGIS API Documentation 3.39.0-Master (be2050b798e)
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qgsgcpgeometrytransformer.cpp
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1/***************************************************************************
2 qgsgcpgeometrytransformer.cpp
3 ----------------------
4 begin : February 2021
5 copyright : (C) 2021 by Nyall Dawson
6 email : nyall dot dawson at gmail dot com
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
19#include "qgsgeometry.h"
20
22 : mGcpTransformer( gcpTransformer )
23{
24
25}
26
27QgsGcpGeometryTransformer::QgsGcpGeometryTransformer( QgsGcpTransformerInterface::TransformMethod method, const QVector<QgsPointXY> &sourceCoordinates, const QVector<QgsPointXY> &destinationCoordinates )
28 : mGcpTransformer( QgsGcpTransformerInterface::createFromParameters( method, sourceCoordinates, destinationCoordinates ) )
29{
30
31}
32
34
35bool QgsGcpGeometryTransformer::transformPoint( double &x, double &y, double &, double & )
36{
37 if ( !mGcpTransformer )
38 return false;
39
40 return mGcpTransformer->transform( x, y );
41}
42
44{
45 ok = false;
46 if ( geometry.isNull() )
47 {
48 ok = true;
49 return QgsGeometry();
50 }
51
52 std::unique_ptr< QgsAbstractGeometry > res( geometry.constGet()->clone() );
53
54 ok = res->transform( this, feedback );
55
56 return QgsGeometry( std::move( res ) );
57}
58
60{
61 return mGcpTransformer.get();
62}
63
65{
66 mGcpTransformer.reset( gcpTransformer );
67}
virtual QgsAbstractGeometry * clone() const =0
Clones the geometry by performing a deep copy.
Base class for feedback objects to be used for cancellation of something running in a worker thread.
Definition qgsfeedback.h:44
void setGcpTransformer(QgsGcpTransformerInterface *transformer)
Sets the underlying GCP transformer used to transform geometries.
QgsGeometry transform(const QgsGeometry &geometry, bool &ok, QgsFeedback *feedback=nullptr)
Transforms the specified input geometry using the GCP based transform.
~QgsGcpGeometryTransformer() override
QgsGcpGeometryTransformer(QgsGcpTransformerInterface *gcpTransformer)
Constructor for QgsGcpGeometryTransformer, which uses the specified gcpTransformer to modify geometri...
bool transformPoint(double &x, double &y, double &z, double &m) override
Transforms the point defined by the coordinates (x, y, z) and the specified m value.
QgsGcpTransformerInterface * gcpTransformer() const
Returns the underlying GCP transformer used to transform geometries.
An interface for Ground Control Points (GCP) based transformations.
TransformMethod
Available transformation methods.
A geometry is the spatial representation of a feature.
const QgsAbstractGeometry * constGet() const
Returns a non-modifiable (const) reference to the underlying abstract geometry primitive.