Bug report #15894
Updated by Regis Haubourg about 7 years ago
A problem arises with the following combination:
- a PostGIS line layer
- "transaction groups" enabled
- multi thread rendering
In this particular case, when trying to displace a segment with the node tool, only one vertex is actually displaced. When disabling the multi thread rendering, it works fine.
See the picture for illustration.
The node tool edit sends two vertex updates when displacing a line segment. It seems that when the multi thread rendering is enabled, the second vertex update sends a new geometry based on the initial geometry (not the one after the first vertex update as it should be). Probably some geometry cache that is not cleared ...
on 2.18 Linux
- a PostGIS line layer
- "transaction groups" enabled
- multi thread rendering
In this particular case, when trying to displace a segment with the node tool, only one vertex is actually displaced. When disabling the multi thread rendering, it works fine.
See the picture for illustration.
The node tool edit sends two vertex updates when displacing a line segment. It seems that when the multi thread rendering is enabled, the second vertex update sends a new geometry based on the initial geometry (not the one after the first vertex update as it should be). Probably some geometry cache that is not cleared ...
on 2.18 Linux