QGIS API Documentation 3.40.0-Bratislava (b56115d8743)
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2-dimensional helmert transform, parametrised by isotropic scale, rotation angle and translation. More...
#include <qgsgcptransformer.h>
Public Member Functions | |
QgsHelmertGeorefTransform ()=default | |
QgsGcpTransformerInterface * | clone () const override |
Clones the transformer, returning a new copy of the transformer with the same parameters as this one. | |
GDALTransformerFunc | GDALTransformer () const override |
Returns function pointer to the GDALTransformer function. | |
void * | GDALTransformerArgs () const override |
Returns pointer to the GDALTransformer arguments. | |
bool | getOriginScaleRotation (QgsPointXY &origin, double &scale, double &rotation) const |
Returns the origin, scale and rotation for the transform. | |
TransformMethod | method () const override |
Returns the transformation method. | |
int | minimumGcpCount () const override |
Returns the minimum number of Ground Control Points (GCPs) required for parameter fitting. | |
bool | updateParametersFromGcps (const QVector< QgsPointXY > &sourceCoordinates, const QVector< QgsPointXY > &destinationCoordinates, bool invertYAxis=false) override |
Fits transformation parameters using the specified Ground Control Points (GCPs) lists of source and destination coordinates. | |
Public Member Functions inherited from QgsGcpTransformerInterface | |
QgsGcpTransformerInterface ()=default | |
QgsGcpTransformerInterface (const QgsGcpTransformerInterface &other)=delete | |
QgsGcpTransformerInterface cannot be copied - use clone() instead. | |
virtual | ~QgsGcpTransformerInterface ()=default |
QgsGcpTransformerInterface & | operator= (const QgsGcpTransformerInterface &other)=delete |
QgsGcpTransformerInterface cannot be copied - use clone() instead. | |
bool | transform (double &x, double &y, bool inverseTransform=false) const |
Transforms the point (x, y) from source to destination coordinates. | |
Additional Inherited Members | |
Public Types inherited from QgsGcpTransformerInterface | |
enum class | TransformMethod : int { Linear , Helmert , PolynomialOrder1 , PolynomialOrder2 , PolynomialOrder3 , ThinPlateSpline , Projective , InvalidTransform = 65535 } |
Available transformation methods. More... | |
Static Public Member Functions inherited from QgsGcpTransformerInterface | |
static QgsGcpTransformerInterface * | create (TransformMethod method) |
Creates a new QgsGcpTransformerInterface subclass representing the specified transform method. | |
static QgsGcpTransformerInterface * | createFromParameters (TransformMethod method, const QVector< QgsPointXY > &sourceCoordinates, const QVector< QgsPointXY > &destinationCoordinates) |
Creates a new QgsGcpTransformerInterface subclass representing the specified transform method, initialized using the given lists of source and destination coordinates. | |
static QString | methodToString (TransformMethod method) |
Returns a translated string representing the specified transform method. | |
2-dimensional helmert transform, parametrised by isotropic scale, rotation angle and translation.
Definition at line 189 of file qgsgcptransformer.h.
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default |
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overridevirtual |
Clones the transformer, returning a new copy of the transformer with the same parameters as this one.
Caller takes ownership of the returned object.
Implements QgsGcpTransformerInterface.
Definition at line 236 of file qgsgcptransformer.cpp.
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overridevirtual |
Returns function pointer to the GDALTransformer function.
Implements QgsGcpTransformerInterface.
Definition at line 213 of file qgsgcptransformer.cpp.
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overridevirtual |
Returns pointer to the GDALTransformer arguments.
Implements QgsGcpTransformerInterface.
Definition at line 218 of file qgsgcptransformer.cpp.
bool QgsHelmertGeorefTransform::getOriginScaleRotation | ( | QgsPointXY & | origin, |
double & | scale, | ||
double & | rotation | ||
) | const |
Returns the origin, scale and rotation for the transform.
Definition at line 228 of file qgsgcptransformer.cpp.
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overridevirtual |
Returns the transformation method.
Implements QgsGcpTransformerInterface.
Definition at line 223 of file qgsgcptransformer.cpp.
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overridevirtual |
Returns the minimum number of Ground Control Points (GCPs) required for parameter fitting.
Implements QgsGcpTransformerInterface.
Definition at line 208 of file qgsgcptransformer.cpp.
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overridevirtual |
Fits transformation parameters using the specified Ground Control Points (GCPs) lists of source and destination coordinates.
If invertYAxis is set to true
then the y-axis of source coordinates will be inverted, e.g. to allow for transformation of raster layers with ascending top-to-bottom vertical axis coordinates.
true
on success, false
on failure Implements QgsGcpTransformerInterface.
Definition at line 198 of file qgsgcptransformer.cpp.