qgsmeshutils.h

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/***************************************************************************
                         qgsmeshutils.h
                         --------------------------
    begin                : April 2018
    copyright            : (C) 2018 by Peter Petrik
    email                : zilolv 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 QGSMESHUTILS_H
#define QGSMESHUTILS_H
 
#include "qgis.h"
#include "qgis_sip.h"
#include "qgsmeshdataset.h"
#include "qgspoint.h"
 
class QgsRasterBlock;
class QgsMeshLayer;
class QgsMeshDatasetIndex;
class QgsCoordinateReferenceSystem;
class QgsCoordinateTransform;
class QgsCoordinateTransformContext;
class QgsRectangle;
class QgsRasterBlockFeedback;
class QgsTriangularMesh;
class QgsMeshDataBlock;
class QgsPointXY;
class QgsGeometry;
class QgsPolygon;

typedef QgsPoint QgsMeshVertex;

typedef QVector<int> QgsMeshFace;

typedef QPair<int, int> QgsMeshEdge;
 

class CORE_EXPORT QgsMeshUtils
{
  public:

    static QgsRasterBlock *exportRasterBlock(
      const QgsMeshLayer &layer,
      const QgsMeshDatasetIndex &datasetIndex,
      const QgsCoordinateReferenceSystem &destinationCrs,
      const QgsCoordinateTransformContext &transformContext,
      double mapUnitsPerPixel,
      const QgsRectangle &extent,
      QgsRasterBlockFeedback *feedback = nullptr
    ) SIP_FACTORY;
 

    static QgsRasterBlock *exportRasterBlock(
      const QgsTriangularMesh &triangularMesh,
      const QgsMeshDataBlock &datasetValues,
      const QgsMeshDataBlock &activeFlags,
      const QgsMeshDatasetGroupMetadata::DataType dataType,
      const QgsCoordinateTransform &transform,
      double mapUnitsPerPixel,
      const QgsRectangle &extent,
      QgsRasterBlockFeedback *feedback = nullptr
    ) SIP_SKIP;

    SIP_SKIP static QgsGeometry toGeometry( const QgsMeshFace &face, const QVector<QgsMeshVertex> &vertices );

    SIP_SKIP static QgsMeshVertex centroid( const QgsMeshFace &face, const QVector<QgsMeshVertex> &vertices );

    SIP_SKIP static std::unique_ptr< QgsPolygon > toPolygon( const QgsMeshFace &face, const QVector<QgsMeshVertex> &vertices );

    SIP_SKIP static QSet<int> nativeFacesFromTriangles( const QList<int> &triangleIndexes, const QVector<int> &trianglesToNativeFaces );

    SIP_SKIP static QSet<int> nativeEdgesFromEdges( const QList<int> &edgesIndexes, const QVector<int> &edgesToNativeEdges );

    SIP_SKIP static QSet<int> nativeVerticesFromTriangles( const QList<int> &triangleIndexes, const QVector<QgsMeshFace> &triangles );

    SIP_SKIP static QSet<int> nativeVerticesFromEdges( const QList<int> &edgesIndexes, const QVector<QgsMeshEdge> &edges );

    SIP_SKIP static bool isInTriangleFace( const QgsPointXY point, const QgsMeshFace &face,  const QVector<QgsMeshVertex> &vertices );

    SIP_SKIP static void setCounterClockwise( QgsMeshFace &triangle, const QgsMeshVertex &v0, const QgsMeshVertex &v1, const QgsMeshVertex &v2 );
 
};
 
#endif // QGSMESHUTILS_H