Exemple #1
0
OGRGeometry *OGRCompoundCurve::clone() const
{
    OGRCompoundCurve *poNewCC = new OGRCompoundCurve;
    poNewCC->assignSpatialReference( getSpatialReference() );
    poNewCC->flags = flags;

    for( int i = 0; i < oCC.nCurveCount; i++ )
    {
        poNewCC->addCurve( oCC.papoCurves[i] );
    }

    return poNewCC;
}
Exemple #2
0
void OGRILI1Layer::JoinSurfaceLayer( OGRILI1Layer* poSurfaceLineLayer,
                                     int nSurfaceFieldIndex )
{
    CPLDebug( "OGR_ILI", "Joining surface layer %s with geometries",
              GetLayerDefn()->GetName());
    OGRwkbGeometryType geomType
        = GetLayerDefn()->GetGeomFieldDefn(nSurfaceFieldIndex)->GetType();

    std::map<OGRFeature*, std::vector<OGRCurve*> > oMapFeatureToGeomSet;

    poSurfaceLineLayer->ResetReading();

    // First map: for each target curvepolygon, find all belonging curves
    while (OGRFeature *linefeature = poSurfaceLineLayer->GetNextFeatureRef()) {
        //OBJE entries with same _RefTID are polygon rings of same feature
        OGRFeature *feature = nullptr;
        if (poFeatureDefn->GetFieldDefn(0)->GetType() == OFTString)
        {
          feature = GetFeatureRef(linefeature->GetFieldAsString(1));
        }
        else
        {
          GIntBig reftid = linefeature->GetFieldAsInteger64(1);
          feature = GetFeatureRef(reftid);
        }
        if (feature)
        {
            OGRGeometry* poGeom = linefeature->GetGeomFieldRef(0);
            OGRMultiCurve *curves = dynamic_cast<OGRMultiCurve *>(poGeom);
            if( curves )
            {
                for (auto&& curve: curves )
                {
                    if( !curve->IsEmpty() )
                        oMapFeatureToGeomSet[feature].push_back(curve);
                }
            }
        }
        else
        {
            CPLError( CE_Warning, CPLE_AppDefined,
                      "Couldn't join feature FID " CPL_FRMT_GIB,
                      linefeature->GetFieldAsInteger64(1) );
        }
    }

    // Now for each target polygon, assemble the curves together.
    std::map<OGRFeature*, std::vector<OGRCurve*> >::const_iterator oIter =
                                                oMapFeatureToGeomSet.begin();
    for( ; oIter != oMapFeatureToGeomSet.end(); ++oIter )
    {
        OGRFeature* feature = oIter->first;
        std::vector<OGRCurve*> oCurves = oIter->second;

        std::vector<OGRCurve*> oSetDestCurves;
        double dfLargestArea = 0.0;
        OGRCurve* poLargestCurve = nullptr;
        while( true )
        {
            std::vector<OGRCurve*>::iterator oIterCurves = oCurves.begin();
            if( oIterCurves == oCurves.end() )
                break;

            OGRPoint endPointCC;
            OGRCompoundCurve* poCC = new OGRCompoundCurve();

            bool bFirst = true;
            while( true )
            {
                bool bNewCurveAdded = false;
                const double dfEps = 1e-14;
                for(oIterCurves = oCurves.begin();
                                oIterCurves != oCurves.end(); ++oIterCurves )
                {
                    OGRCurve* curve = *oIterCurves;
                    OGRPoint startPoint;
                    OGRPoint endPoint;
                    curve->StartPoint(&startPoint);
                    curve->EndPoint(&endPoint);
                    if( bFirst ||
                        (fabs(startPoint.getX() - endPointCC.getX()) < dfEps &&
                         fabs(startPoint.getY() - endPointCC.getY()) < dfEps) )
                    {
                        bFirst = false;

                        curve->EndPoint(&endPointCC);

                        const OGRwkbGeometryType eCurveType =
                                        wkbFlatten(curve->getGeometryType());
                        if( eCurveType == wkbCompoundCurve )
                        {
                            OGRCompoundCurve* poCCSub = curve->toCompoundCurve();
                            for( auto&& subCurve: poCCSub )
                            {
                                poCC->addCurve(subCurve);
                            }
                        }
                        else
                        {
                            poCC->addCurve( curve );
                        }
                        oCurves.erase( oIterCurves );
                        bNewCurveAdded = true;
                        break;
                    }
                    else
                    if( fabs(endPoint.getX() - endPointCC.getX()) < dfEps &&
                        fabs(endPoint.getY() - endPointCC.getY()) < dfEps )
                    {
                        curve->StartPoint(&endPointCC);

                        const OGRwkbGeometryType eCurveType =
                                        wkbFlatten(curve->getGeometryType());
                        if( eCurveType == wkbLineString ||
                            eCurveType == wkbCircularString )
                        {
                            OGRSimpleCurve* poSC = curve->clone()->toSimpleCurve();
                            poSC->reversePoints();
                            poCC->addCurveDirectly( poSC );
                        }
                        else if( eCurveType == wkbCompoundCurve )
                        {
                            // Reverse the order of the elements of the
                            // compound curve
                            OGRCompoundCurve* poCCSub = curve->toCompoundCurve();
                            for( int i=poCCSub->getNumCurves()-1; i >= 0; --i )
                            {
                                OGRSimpleCurve* poSC = poCCSub->getCurve(i)->
                                    clone()->toSimpleCurve();
                                poSC->reversePoints();
                                poCC->addCurveDirectly(poSC);
                            }
                        }

                        oCurves.erase( oIterCurves );
                        bNewCurveAdded = true;
                        break;
                    }
                }
                if( !bNewCurveAdded || oCurves.empty() || poCC->get_IsClosed() )
                    break;
            }

            if( !poCC->get_IsClosed() )
            {
                char* pszJSon = poCC->exportToJson();
                CPLError(CE_Warning, CPLE_AppDefined,
                         "A ring %s for feature " CPL_FRMT_GIB " in layer %s "
                         "was not closed. Dropping it",
                         pszJSon, feature->GetFID(), GetName());
                delete poCC;
                CPLFree(pszJSon);
            }
            else
            {
                double dfArea = poCC->get_Area();
                if( dfArea >= dfLargestArea )
                {
                    dfLargestArea = dfArea;
                    poLargestCurve = poCC;
                }
                oSetDestCurves.push_back(poCC);
            }
        }

        // Now build the final polygon by first inserting the largest ring.
        OGRCurvePolygon *poPoly = (geomType == wkbPolygon) ?
                                new OGRPolygon() : new OGRCurvePolygon();
        if( poLargestCurve )
        {
            std::vector<OGRCurve*>::iterator oIterCurves =
                                                    oSetDestCurves.begin();
            for( ; oIterCurves != oSetDestCurves.end(); ++oIterCurves )
            {
                OGRCurve* poCurve = *oIterCurves;
                if( poCurve == poLargestCurve )
                {
                    oSetDestCurves.erase( oIterCurves );
                    break;
                }
            }

            if (geomType == wkbPolygon)
            {
                poLargestCurve = OGRCurve::CastToLinearRing(poLargestCurve);
            }
            OGRErr error = poPoly->addRingDirectly(poLargestCurve);
            if (error != OGRERR_NONE)
            {
                char* pszJSon = poLargestCurve->exportToJson();
                CPLError(CE_Warning, CPLE_AppDefined,
                         "Cannot add ring %s to feature " CPL_FRMT_GIB
                         " in layer %s",
                         pszJSon, feature->GetFID(), GetName() );
                CPLFree(pszJSon);
            }

            oIterCurves = oSetDestCurves.begin();
            for( ; oIterCurves != oSetDestCurves.end(); ++oIterCurves )
            {
                OGRCurve* poCurve = *oIterCurves;
                if (geomType == wkbPolygon)
                {
                    poCurve = OGRCurve::CastToLinearRing(poCurve);
                }
                error = poPoly->addRingDirectly(poCurve);
                if (error != OGRERR_NONE)
                {
                    char* pszJSon = poCurve->exportToJson();
                    CPLError(CE_Warning, CPLE_AppDefined,
                            "Cannot add ring %s to feature " CPL_FRMT_GIB
                            " in layer %s",
                            pszJSon, feature->GetFID(), GetName() );
                    CPLFree(pszJSon);
                }
            }
        }

        feature->SetGeomFieldDirectly(nSurfaceFieldIndex, poPoly);
    }

    ResetReading();
}