[Qgis-user] Flip

[Siki Zoltan]

Dear Diego,

here is a short python solution to flip all selected polylines in the 
actual layer.
You can use it in the python console.

layer = qgis.utils.iface.mapCanvas().currentLayer()
for feature in layer.selectedFeatures():
    geom = feature.geometry()
    nodes = geom.asPolyline()
    nodes.reverse()
    newgeom = QgsGeometry.fromPolyline(nodes)
    layer.changeGeometry(feature.id(),newgeom)
qgis.utils.iface.mapCanvas().refresh()

Zoltan

On Wed, 13 Aug 2014, Diego Lawrie wrote:

> Dear all, how can I switch line direction in QGIS?
> Thanks
>