QGIS API Documentation  2.5.0-Master
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Properties Friends Macros Modules Pages
Public Member Functions | Private Member Functions | Private Attributes | List of all members
QgsPointSample Class Reference

Creates random points in polygons / multipolygons. More...

#include <qgspointsample.h>

Collaboration diagram for QgsPointSample:
Collaboration graph
[legend]

Public Member Functions

 QgsPointSample (QgsVectorLayer *inputLayer, const QString &outputLayer, QString nPointsAttribute, QString minDistAttribute=QString())
 
 ~QgsPointSample ()
 
int createRandomPoints (QProgressDialog *pd)
 Starts calculation of random points. More...
 

Private Member Functions

 QgsPointSample ()
 
void addSamplePoints (QgsFeature &inputFeature, QgsVectorFileWriter &writer, int nPoints, double minDistance)
 
bool checkMinDistance (QgsPoint &pt, QgsSpatialIndex &index, double minDistance, QMap< QgsFeatureId, QgsPoint > &pointMap)
 

Private Attributes

QgsVectorLayermInputLayer
 Layer id of input polygon/multipolygon layer. More...
 
QString mOutputLayer
 Output path of result layer. More...
 
QString mNumberOfPointsAttribute
 Attribute containing number of points per feature. More...
 
QString mMinDistanceAttribute
 Attribute containing minimum distance between sample points (or -1 if no min. More...
 
QgsFeatureId mNCreatedPoints
 

Detailed Description

Creates random points in polygons / multipolygons.

Definition at line 15 of file qgspointsample.h.

Constructor & Destructor Documentation

QgsPointSample::QgsPointSample ( QgsVectorLayer inputLayer,
const QString &  outputLayer,
QString  nPointsAttribute,
QString  minDistAttribute = QString() 
)

Definition at line 10 of file qgspointsample.cpp.

QgsPointSample::~QgsPointSample ( )

Definition at line 19 of file qgspointsample.cpp.

QgsPointSample::QgsPointSample ( )
private

Definition at line 15 of file qgspointsample.cpp.

Member Function Documentation

void QgsPointSample::addSamplePoints ( QgsFeature inputFeature,
QgsVectorFileWriter writer,
int  nPoints,
double  minDistance 
)
private
bool QgsPointSample::checkMinDistance ( QgsPoint pt,
QgsSpatialIndex index,
double  minDistance,
QMap< QgsFeatureId, QgsPoint > &  pointMap 
)
private

Definition at line 134 of file qgspointsample.cpp.

References QgsSpatialIndex::nearestNeighbor(), and QgsPoint::sqrDist().

Referenced by addSamplePoints().

int QgsPointSample::createRandomPoints ( QProgressDialog *  pd)

Member Data Documentation

QgsVectorLayer* QgsPointSample::mInputLayer
private

Layer id of input polygon/multipolygon layer.

Definition at line 32 of file qgspointsample.h.

Referenced by createRandomPoints().

QString QgsPointSample::mMinDistanceAttribute
private

Attribute containing minimum distance between sample points (or -1 if no min.

distance constraint)

Definition at line 38 of file qgspointsample.h.

Referenced by createRandomPoints().

QgsFeatureId QgsPointSample::mNCreatedPoints
private

Definition at line 39 of file qgspointsample.h.

Referenced by addSamplePoints(), and createRandomPoints().

QString QgsPointSample::mNumberOfPointsAttribute
private

Attribute containing number of points per feature.

Definition at line 36 of file qgspointsample.h.

Referenced by createRandomPoints().

QString QgsPointSample::mOutputLayer
private

Output path of result layer.

Definition at line 34 of file qgspointsample.h.

Referenced by createRandomPoints().


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