qgstininterpolator.h

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/***************************************************************************
                              qgstininterpolator.h
                              --------------------
  begin                : March 10, 2008
  copyright            : (C) 2008 by Marco Hugentobler
  email                : marco dot hugentobler at karto dot baug dot ethz dot ch
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef QGSTININTERPOLATOR_H
#define QGSTININTERPOLATOR_H

#include "qgsinterpolator.h"
#include <QString>
#include "qgis_analysis.h"

class QgsFeatureSink;
class Triangulation;
class TriangleInterpolator;
class QgsFeature;
class QgsFeedback;
class QgsFields;

class ANALYSIS_EXPORT QgsTinInterpolator: public QgsInterpolator
{
  public:

    enum TinInterpolation
    {
      Linear, 
      CloughTocher, 
    };

    QgsTinInterpolator( const QList<QgsInterpolator::LayerData> &inputData, TinInterpolation interpolation = Linear, QgsFeedback *feedback = nullptr );
    ~QgsTinInterpolator() override;

    int interpolatePoint( double x, double y, double &result SIP_OUT, QgsFeedback *feedback ) override;

    static QgsFields triangulationFields();

    void setTriangulationSink( QgsFeatureSink *sink );

  private:
    Triangulation *mTriangulation = nullptr;
    TriangleInterpolator *mTriangleInterpolator = nullptr;
    bool mIsInitialized;
    QgsFeedback *mFeedback = nullptr;

    QgsFeatureSink *mTriangulationSink = nullptr;
    TinInterpolation mInterpolation;

    void initialize();

    int insertData( const QgsFeature &f, QgsInterpolator::ValueSource source, int attr, SourceType type );

    int addPointsFromGeometry( const QgsGeometry &g, ValueSource source, double attributeValue );
};

#endif