qgsmeshlayerutils.h

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/***************************************************************************
                         qgsmeshlayerutils.h
                         --------------------------
    begin                : August 2018
    copyright            : (C) 2018 by Martin Dobias
    email                : wonder dot sk at gmail dot com
 ***************************************************************************/
 
/***************************************************************************
 *                                                                         *
 *   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 QGSMESHLAYERUTILS_H
#define QGSMESHLAYERUTILS_H
 
 
#include "qgis_core.h"
#include "qgsmaptopixel.h"
#include "qgsmeshdataprovider.h"
#include "qgsmeshrenderersettings.h"
#include "qgsrectangle.h"
 
#include <QSize>
#include <QVector>
 
#define SIP_NO_FILE

 
class QgsMeshTimeSettings;
class QgsTriangularMesh;
class QgsMeshDataBlock;
class QgsMesh3DAveragingMethod;
class QgsMeshDatasetValue;
class QgsMeshLayer;

class CORE_EXPORT QgsMeshLayerUtils
{
  public:

    static int datasetValuesCount( const QgsMesh *mesh, QgsMeshDatasetGroupMetadata::DataType dataType );

    static QgsMeshDatasetGroupMetadata::DataType datasetValuesType( const QgsMeshDatasetGroupMetadata::DataType &type );

    static QgsMeshDataBlock datasetValues(
      const QgsMeshLayer *meshLayer,
      QgsMeshDatasetIndex index,
      int valueIndex,
      int count );

    static QVector<QgsVector> griddedVectorValues(
      const QgsMeshLayer *meshLayer,
      const QgsMeshDatasetIndex index,
      double xSpacing,
      double ySpacing,
      const QSize &size,
      const QgsPointXY &minCorner );

    static QVector<double> calculateMagnitudes( const QgsMeshDataBlock &block );

    static void boundingBoxToScreenRectangle(
      const QgsMapToPixel &mtp,
      const QSize &outputSize,
      const QgsRectangle &bbox,
      int &leftLim,
      int &rightLim,
      int &bottomLim,
      int &topLim,
      double devicePixelRatio = 1.0 );

    static QgsRectangle boundingBoxToScreenRectangle(
      const QgsMapToPixel &mtp,
      const QgsRectangle &bbox,
      double devicePixelRatio = 1.0
    );

    static bool calculateBarycentricCoordinates(
      const QgsPointXY &pA,
      const QgsPointXY &pB,
      const QgsPointXY &pC,
      const QgsPointXY &pP,
      double &lam1,
      double &lam2,
      double &lam3
    );

    static double interpolateFromVerticesData(
      double fraction,
      double val1, double val2
    );

    static QgsMeshDatasetValue interpolateFromVerticesData( double fraction,
        const QgsMeshDatasetValue &val1, const QgsMeshDatasetValue &val2
                                                          );

    static double interpolateFromVerticesData(
      const QgsPointXY &p1, const QgsPointXY &p2, const QgsPointXY &p3,
      double val1, double val2, double val3, const QgsPointXY &pt
    );

    static double interpolateZForPoint( const QgsTriangularMesh &mesh, double x, double y );

    static QgsVector interpolateVectorFromVerticesData(
      const QgsPointXY &p1, const QgsPointXY &p2, const QgsPointXY &p3,
      QgsVector vect1, QgsVector vect2, QgsVector vect3, const QgsPointXY &pt
    );

    static double interpolateFromFacesData(
      const QgsPointXY &p1, const QgsPointXY &p2, const QgsPointXY &p3,
      double val, const QgsPointXY &pt );

    static QgsVector interpolateVectorFromFacesData(
      const QgsPointXY &p1, const QgsPointXY &p2, const QgsPointXY &p3,
      QgsVector vect, const QgsPointXY &pt );

    static QVector<double> interpolateFromFacesData(
      QVector<double> valuesOnFaces,
      const QgsMesh *nativeMesh,
      const QgsTriangularMesh *triangularMesh,
      QgsMeshDataBlock *active,
      QgsMeshRendererScalarSettings::DataResamplingMethod method
    );

    static QVector<double> interpolateFromFacesData(
      const QVector<double> &valuesOnFaces,
      const QgsMesh &nativeMesh,
      QgsMeshDataBlock *active,
      QgsMeshRendererScalarSettings::DataResamplingMethod method
    );

    static QVector<double> interpolateFromFacesData(
      const QVector<double> &valuesOnFaces,
      const QgsMesh &nativeMesh,
      const QgsMeshDataBlock &active,
      QgsMeshRendererScalarSettings::DataResamplingMethod method
    );

    static QVector<double> resampleFromVerticesToFaces(
      const QVector<double> valuesOnVertices,
      const QgsMesh *nativeMesh,
      const QgsTriangularMesh *triangularMesh,
      const QgsMeshDataBlock *active,
      QgsMeshRendererScalarSettings::DataResamplingMethod method
    );

    static QVector<double> calculateMagnitudeOnVertices(
      const QgsMeshLayer *meshLayer,
      const QgsMeshDatasetIndex index,
      QgsMeshDataBlock *activeFaceFlagValues,
      const QgsMeshRendererScalarSettings::DataResamplingMethod method = QgsMeshRendererScalarSettings::NeighbourAverage );

    static QVector<double> calculateMagnitudeOnVertices(
      const QgsMesh &nativeMesh,
      const QgsMeshDatasetGroupMetadata &groupMetadata,
      const QgsMeshDataBlock &datasetValues,
      const QgsMeshDataBlock &activeFaceFlagValues,
      const QgsMeshRendererScalarSettings::DataResamplingMethod method = QgsMeshRendererScalarSettings::NeighbourAverage );
 
 

    static QgsRectangle triangleBoundingBox( const QgsPointXY &p1, const QgsPointXY &p2, const QgsPointXY &p3 );

    static QString formatTime( double hours, const QDateTime &referenceTime, const QgsMeshTimeSettings &settings );

    static QVector<QVector3D> calculateNormals(
      const QgsTriangularMesh &triangularMesh,
      const QVector<double> &verticalMagnitude,
      bool isRelative );

    static bool haveSameParentQuantity( const QgsMeshLayer *layer, const QgsMeshDatasetIndex &index1, const QgsMeshDatasetIndex &index2 );
 
};

 
#endif // QGSMESHLAYERUTILS_H