QgsTINInterpolator Class Reference

Interpolation in a triangular irregular network. More...

#include <qgstininterpolator.h>

Inheritance diagram for QgsTINInterpolator:

Collaboration diagram for QgsTINInterpolator:

Public Types
enum	TIN_INTERPOLATION { Linear, CloughTocher }
Public Types inherited from QgsInterpolator
enum	InputType { POINTS, STRUCTURE_LINES, BREAK_LINES }
	Describes the type of input data. More...

Public Member Functions
	QgsTINInterpolator (const QList< LayerData > &inputData, TIN_INTERPOLATION interpolation=Linear, bool showProgressDialog=false)
	~QgsTINInterpolator ()
int	interpolatePoint (double x, double y, double &result)
	Calculates interpolation value for map coordinates x, y.
void	setExportTriangulationToFile (bool e)
void	setTriangulationFilePath (const QString &filepath)
Public Member Functions inherited from QgsInterpolator
	QgsInterpolator (const QList< LayerData > &layerData)
virtual	~QgsInterpolator ()

Private Member Functions
void	initialize ()
	Create dual edge triangulation.
int	insertData (QgsFeature *f, bool zCoord, int attr, InputType type)
	Inserts the vertices of a feature into the triangulation.

Private Attributes
Triangulation *	mTriangulation
TriangleInterpolator *	mTriangleInterpolator
bool	mIsInitialized
bool	mShowProgressDialog
bool	mExportTriangulationToFile
	If true: export triangulation to shapefile after initialisation.
QString	mTriangulationFilePath
	File path to export the triangulation.
TIN_INTERPOLATION	mInterpolation
	Type of interpolation.

Additional Inherited Members
Protected Member Functions inherited from QgsInterpolator
int	cacheBaseData ()
	Caches the vertex and value data from the provider.
Protected Attributes inherited from QgsInterpolator
QVector< vertexData >	mCachedBaseData
bool	mDataIsCached
	Flag that tells if the cache already has been filled.
QList< LayerData >	mLayerData

Detailed Description

Interpolation in a triangular irregular network.

Definition at line 29 of file qgstininterpolator.h.

Member Enumeration Documentation

enum QgsTINInterpolator::TIN_INTERPOLATION

Enumerator:

Linear
CloughTocher

Definition at line 33 of file qgstininterpolator.h.

Constructor & Destructor Documentation

QgsTINInterpolator::QgsTINInterpolator	(	const QList< LayerData > &	inputData,
		TIN_INTERPOLATION	interpolation = Linear,
		bool	showProgressDialog = false
	)

Definition at line 29 of file qgstininterpolator.cpp.

QgsTINInterpolator::~QgsTINInterpolator

(

)

Definition at line 40 of file qgstininterpolator.cpp.

References mTriangleInterpolator, and mTriangulation.

Member Function Documentation

void QgsTINInterpolator::initialize ( )

private

Create dual edge triangulation.

Definition at line 67 of file qgstininterpolator.cpp.

References TriDecorator::addTriangulation(), CloughTocher, NormVecDecorator::estimateFirstDerivatives(), insertData(), mExportTriangulationToFile, mInterpolation, mIsInitialized, QgsInterpolator::mLayerData, mShowProgressDialog, mTriangleInterpolator, mTriangulation, mTriangulationFilePath, QgsFeatureIterator::nextFeature(), DualEdgeTriangulation::saveAsShapefile(), NormVecDecorator::setTriangleInterpolator(), CloughTocherInterpolator::setTriangulation(), and tr.

Referenced by interpolatePoint().

int QgsTINInterpolator::insertData ( QgsFeature *  f, bool  zCoord, int  attr, InputType  type  )

private

Inserts the vertices of a feature into the triangulation.

Parameters

f	the feature
zCoord	true if the z coordinate is the interpolation attribute
attr	interpolation attribute index (if zCoord is false)
type	point/structure line, break line

Returns

0 in case of success, -1 if the feature could not be inserted because of numerical problems

Definition at line 168 of file qgstininterpolator.cpp.

References Triangulation::addLine(), Triangulation::addPoint(), QgsGeometry::asWkb(), QgsFeature::attribute(), QgsInterpolator::BREAK_LINES, QgsFeature::geometry(), Line3D::insertPoint(), mTriangulation, QgsInterpolator::POINTS, QGis::WKBLineString, QGis::WKBLineString25D, QGis::WKBMultiLineString, QGis::WKBMultiLineString25D, QGis::WKBMultiPoint, QGis::WKBMultiPoint25D, QGis::WKBMultiPolygon, QGis::WKBMultiPolygon25D, QGis::WKBPoint, QGis::WKBPoint25D, QGis::WKBPolygon, QGis::WKBPolygon25D, and QgsGeometry::wkbType().

Referenced by initialize().

int QgsTINInterpolator::interpolatePoint ( double  x, double  y, double &  result  )

virtual

Calculates interpolation value for map coordinates x, y.

Parameters

x	x-coordinate (in map units)
y	y-coordinate (in map units)
result	out: interpolation result

Returns

0 in case of success

Implements QgsInterpolator.

Definition at line 46 of file qgstininterpolator.cpp.

References TriangleInterpolator::calcPoint(), Point3D::getZ(), initialize(), mIsInitialized, and mTriangleInterpolator.

void QgsTINInterpolator::setExportTriangulationToFile ( bool  e )

inline

Definition at line 48 of file qgstininterpolator.h.

void QgsTINInterpolator::setTriangulationFilePath ( const QString &  filepath )

inline

Definition at line 49 of file qgstininterpolator.h.

Member Data Documentation

bool QgsTINInterpolator::mExportTriangulationToFile

private

If true: export triangulation to shapefile after initialisation.

Definition at line 57 of file qgstininterpolator.h.

Referenced by initialize().

TIN_INTERPOLATION QgsTINInterpolator::mInterpolation

private

Type of interpolation.

Definition at line 61 of file qgstininterpolator.h.

Referenced by initialize().

bool QgsTINInterpolator::mIsInitialized

private

Definition at line 54 of file qgstininterpolator.h.

Referenced by initialize(), and interpolatePoint().

bool QgsTINInterpolator::mShowProgressDialog

private

Definition at line 55 of file qgstininterpolator.h.

Referenced by initialize().

TriangleInterpolator* QgsTINInterpolator::mTriangleInterpolator

private

Definition at line 53 of file qgstininterpolator.h.

Referenced by initialize(), interpolatePoint(), and ~QgsTINInterpolator().

Triangulation* QgsTINInterpolator::mTriangulation

private

Definition at line 52 of file qgstininterpolator.h.

Referenced by initialize(), insertData(), and ~QgsTINInterpolator().

QString QgsTINInterpolator::mTriangulationFilePath

private

File path to export the triangulation.

Definition at line 59 of file qgstininterpolator.h.

Referenced by initialize().

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The documentation for this class was generated from the following files:

• /tmp/buildd/qgis-2.0.1/src/analysis/interpolation/qgstininterpolator.h
• /tmp/buildd/qgis-2.0.1/src/analysis/interpolation/qgstininterpolator.cpp