int main(int argc, char **argv)
{
// Get data from ogr
OGRRegisterAll();
std::cout << "Opening: " << argv[1] << std::endl;
OGRDataSource *shp = OGRSFDriverRegistrar::Open(argv[1], FALSE);
IsValid(shp, "Error opening file.");
std::cout << "Shape contains " << shp->GetLayerCount() << " layers." << std::endl;
OGRLayer *layer = shp->GetLayerByName(argv[2]);
IsValid(layer, "Couldn't grab layer");
OGRSpatialReference *srcSRS = NULL;
srcSRS = layer->GetSpatialRef();
// Set up writing
const char *kDriverName = "ESRI Shapefile";
OGRSFDriver *shpDriver = OGRSFDriverRegistrar::GetRegistrar()->GetDriverByName(kDriverName);
IsValid(shpDriver, "Couldn't grab the shapefile driver.");
IsValid(argv[3], "Please provide a output shp.");
std::cout << "Writing to: " << argv[3] << std::endl;
OGRDataSource *shpOut = shpDriver->CreateDataSource(argv[3], NULL);
IsValid(shpOut, "Couldn't open output file");
OGRLayer *outLayer = shpOut->CreateLayer(layer->GetName(), srcSRS, wkbMultiLineString, NULL);
IsValid(outLayer, "Couldn't create an output layer");
// copy over the fields from the source file
OGRFeatureDefn *source = layer->GetLayerDefn();
for(int i=0; i < source->GetFieldCount(); i++){
OGRFieldDefn *field = source->GetFieldDefn(i);
if(outLayer->CreateField(field) != OGRERR_NONE) {
std::cout << "Couldn't make layer" << std::endl; exit(1);
};
}
// Loop through features and grab the hull and put it into CGAL then
// skeletonize the points
OGRFeature *feature;
int count = 0;
while((feature = layer->GetNextFeature()) != NULL)
{
OGRMultiPolygon *geometry = dynamic_cast<OGRMultiPolygon *>(OGRGeometryFactory::forceToMultiPolygon(feature->GetGeometryRef()));
IsValid(geometry, "No geometry.");
OGRFeature *outFeature = OGRFeature::CreateFeature(outLayer->GetLayerDefn());
IsValid(outFeature, "Couldn't make a feature.");
for(int i=0; i < source->GetFieldCount(); i++){
OGRField *field = feature->GetRawFieldRef(i);
outFeature->SetField(i, field);
}
OGRGeometry* line = NULL;
for(int i=0; i < geometry->getNumGeometries(); i++){
OGRGeometry* segment = BuildMultiLine(geometry->getGeometryRef(i));
if(segment != NULL){
if(line == NULL) { line = new OGRLineString; }
OGRGeometry* tmp = line->Union(segment);
if(tmp != NULL){
delete line;
line = tmp;
}
delete segment;
}
}
outFeature->SetGeometry(line);
if(outLayer->CreateFeature(outFeature) != OGRERR_NONE){
std::cout << "Couldn't create feature." << std::endl;
exit(1);
}
// clean up
OGRFeature::DestroyFeature(outFeature);
std::cout << std::endl << ++count << std::endl;
}
// cleanup
OGRDataSource::DestroyDataSource(shp);
OGRDataSource::DestroyDataSource(shpOut);
return 0;
}
OGRGeometry * GDALMergeFaces::joinCluster(int cluster) {
std::stringstream query;
query << attriubteName << " = " << cluster;
leadingView.setAttributeFilter(query.str().c_str());
leadingView.resetReading();
OGRFeature * f;
OGRGeometry * geo = 0;
while (f = leadingView.getNextFeature()) {
if (!geo) {
geo = f->GetGeometryRef();
continue;
}
geo = geo->Union(f->GetGeometryRef());
if (!geo)
DM::Logger(DM::Error) << "Something when wrong when unioning";
}
return geo;
}