Exemplos de QgsCoordinateTransformContext em C++ (Cpp)

Exemplo n.º 1

Arquivo: qgscoordinatetransform.cpp Projeto: dmarteau/QGIS

QgsCoordinateTransform::QgsCoordinateTransform( const QgsCoordinateReferenceSystem &source, const QgsCoordinateReferenceSystem &destination )
{
  d = new QgsCoordinateTransformPrivate( source, destination, QgsCoordinateTransformContext() );

  if ( !d->checkValidity() )
    return;

  if ( !setFromCache( d->mSourceCRS, d->mDestCRS, d->mSourceDatumTransform, d->mDestinationDatumTransform ) )
  {
    d->initialize();
    addToCache();
  }
}

Exemplo n.º 2

Arquivo: qgscoordinatetransform.cpp Projeto: boundlessgeo/QGIS

QgsCoordinateTransform::QgsCoordinateTransform( const QgsCoordinateReferenceSystem &source, const QgsCoordinateReferenceSystem &destination, const QgsProject *project )
{
  mContext = project ? project->transformContext() : QgsCoordinateTransformContext();
  d = new QgsCoordinateTransformPrivate( source, destination, mContext );
#ifdef QGISDEBUG
  if ( project )
    mHasContext = true;
#endif

  if ( !d->checkValidity() )
    return;

  if ( !setFromCache( d->mSourceCRS, d->mDestCRS, d->mSourceDatumTransform, d->mDestinationDatumTransform ) )
  {
    d->initialize();
    addToCache();
  }
}

Exemplo n.º 3

Arquivo: testqgs3dutils.cpp Projeto: alexbruy/QGIS

void TestQgs3DUtils::testTransforms()
{
  QgsVector3D map123( 1, 2, 3 );

  QgsVector3D world123 = Qgs3DUtils::mapToWorldCoordinates( map123, QgsVector3D() );
  QCOMPARE( world123, QgsVector3D( 1, 3, -2 ) );

  QgsVector3D world123map = Qgs3DUtils::worldToMapCoordinates( world123, QgsVector3D() );
  QCOMPARE( world123map, map123 );

  // now with non-zero origin

  QgsVector3D origin( -10, -20, -30 );

  QgsVector3D world123x = Qgs3DUtils::mapToWorldCoordinates( map123, origin );
  QCOMPARE( world123x, QgsVector3D( 11, 33, -22 ) );

  QgsVector3D world123xmap = Qgs3DUtils::worldToMapCoordinates( world123x, origin );
  QCOMPARE( world123xmap, map123 );

  //
  // transform world point from one system to another
  //

  QgsVector3D worldPoint1( 5, 7, -6 );
  QgsVector3D origin1( 10, 20, 30 );
  QgsVector3D origin2( 1, 2, 3 );
  QgsVector3D worldPoint2 = Qgs3DUtils::transformWorldCoordinates( worldPoint1, origin1, QgsCoordinateReferenceSystem(), origin2, QgsCoordinateReferenceSystem(), QgsCoordinateTransformContext() );
  QCOMPARE( worldPoint2, QgsVector3D( 14, 34, -24 ) );
  // verify that both are the same map point
  QgsVector3D mapPoint1 = Qgs3DUtils::worldToMapCoordinates( worldPoint1, origin1 );
  QgsVector3D mapPoint2 = Qgs3DUtils::worldToMapCoordinates( worldPoint2, origin2 );
  QCOMPARE( mapPoint1, mapPoint2 );
}

Exemplo n.º 4

Arquivo: qgsalgorithmtransform.cpp Projeto: ccrook/Quantum-GIS

bool QgsTransformAlgorithm::prepareAlgorithm( const QVariantMap &parameters, QgsProcessingContext &context, QgsProcessingFeedback * )
{
  mDestCrs = parameterAsCrs( parameters, QStringLiteral( "TARGET_CRS" ), context );
  mTransformContext = context.project() ? context.project()->transformContext() : QgsCoordinateTransformContext();
  return true;
}