QgsIDWInterpolator Class Reference

#include <qgsidwinterpolator.h>

Inheritance diagram for QgsIDWInterpolator:

Collaboration diagram for QgsIDWInterpolator:

Public Member Functions
	QgsIDWInterpolator (const QList< LayerData > &layerData)
	~QgsIDWInterpolator ()
int	interpolatePoint (double x, double y, double &result)
	Calculates interpolation value for map coordinates x, y.
void	setDistanceCoefficient (double p)
Public Member Functions inherited from QgsInterpolator
	QgsInterpolator (const QList< LayerData > &layerData)
virtual	~QgsInterpolator ()

Private Member Functions
	QgsIDWInterpolator ()

Private Attributes
double	mDistanceCoefficient
	The parameter that sets how the values are weighted with distance.

Additional Inherited Members
Public Types inherited from QgsInterpolator
enum	InputType { POINTS, STRUCTURE_LINES, BREAK_LINES }
	Describes the type of input data. More...
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

Definition at line 23 of file qgsidwinterpolator.h.

Constructor & Destructor Documentation

QgsIDWInterpolator::QgsIDWInterpolator

(

const QList< LayerData > &

layerData

)

Definition at line 22 of file qgsidwinterpolator.cpp.

QgsIDWInterpolator::~QgsIDWInterpolator

(

)

Definition at line 32 of file qgsidwinterpolator.cpp.

QgsIDWInterpolator::QgsIDWInterpolator ( )

private

Definition at line 27 of file qgsidwinterpolator.cpp.

Member Function Documentation

int QgsIDWInterpolator::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 37 of file qgsidwinterpolator.cpp.

References QgsInterpolator::cacheBaseData(), QgsInterpolator::mCachedBaseData, QgsInterpolator::mDataIsCached, mDistanceCoefficient, and MathUtils::min().

void QgsIDWInterpolator::setDistanceCoefficient ( double  p )

inline

Definition at line 36 of file qgsidwinterpolator.h.

Member Data Documentation

double QgsIDWInterpolator::mDistanceCoefficient

private

The parameter that sets how the values are weighted with distance.

Smaller values mean sharper peaks at the data points. The default is a value of 2

Definition at line 45 of file qgsidwinterpolator.h.

Referenced by interpolatePoint().

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

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