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;
}
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();
}