Hi, Not sure if/how I can help on this benchmark. If I understand well you want to know if disabling the simplification on the marker line symbol layer only would make a huge difference or not on rendering performance. But as far as I saw the option is only available for the whole layer at the moment.
Jérémie. Le ven. 19 févr. 2021 à 22:25, Nyall Dawson <[email protected]> a écrit : > On Fri, 19 Feb 2021 at 23:00, Andreas Neumann <[email protected]> wrote: > > > > Hi Jérémie, > > > > Ah good to hear! > > > > I'm not a big fan of this fact that line simplification is turned on by > default in QGIS. I believe that users should consciously turn it on if they > want it! > > I'd be interested to see some benchmarks of disabling vs enabling > simplification for the marker line symbol layer alone. If it's not too > expensive, we could skip it automatically for line marker symbol > layers (it makes a HUGE difference to the rendering speed for simple > line layers and other symbol layer types, but the intention is that > the results should be visually identical to no simplification). > > Nyall > > > > > Your example shows that it can lead to confusion (understandably). > > > > Good that it works now. Note that you can override this setting on a per > layer base in the layer properties - so not all layers need to have the > same setting. > > > > Greetings, > > > > Andreas > > > > On 2021-02-19 13:40, Prud'homme Jérémie wrote: > > > > Hi, > > > > I had simplification turned on, indeed... > > > > I deactivated it : > > - in the Options as you mention, so that it is deactivated for newly > added layers > > - in my layer options (Rendering properties) > > > > And it is ok now. > > > > It makes sense that if the line is simplified the distance vary ! > > > > Thanks Andreas. > > > > > > Jérémie. > > > > Le ven. 19 févr. 2021 à 11:12, Andreas Neumann <[email protected]> a > écrit : > > > > Hi Jérémie, > > > > Do you have geometry simplification turned off? See "Settings" --> > "Options" --> "Rendering" --> "Enable feature simplification ..." > > > > Make sure this is deactivated (I think it is enabled by default). > > > > Greetings, > > > > Andreas > > > > > > On 2021-02-19 11:05, Prud'homme Jérémie wrote: > > > > Tested too fast :( > > > > Behavior is ok when zooming in, but still problems when zooming out > (whereas the entire feature is visible !). > > See here : https://www.zupimages.net/viewer.php?id=21/07/ehlo.gif > > > > Circles should follow the strokes generated with the tool "Points along > geometry". > > > > > > Jérémie. > > > > Le ven. 19 févr. 2021 à 10:03, Prud'homme Jérémie <[email protected]> > a écrit : > > > > Hi, > > > > Thank you very much Nyall, this one was pretty well hidden. > > > > With clipping unchecked, behavior is as expected for my use case. > > > > > > Jérémie. > > > > Le jeu. 18 févr. 2021 à 23:29, Nyall Dawson <[email protected]> a > écrit : > > > > On Wed, 13 Jan 2021 at 06:33, Prud'homme Jérémie <[email protected]> > wrote: > > > > > > Hi, > > > > > > I'm using QGIS 3.10. > > > > > > I tried to use only symbology to display a stroke every km along a > road. > > > The project CRS is 2154 (Lambert 93). > > > > > > When adding a ""symbol line" with an interval of 1000 map units (meter > for 2154) – or 1000 meters at scale, same result – I achieve to display > symbols every km. > > > > > > Problem is when I move the map or change scale, the symbols do not > always stay in place. They are sometimes misplaced. > > > > > > I've been told that problem can be that the first node of the line is > not always the reference to calculate the intervals. > > > > From the bottom of the symbol widget, click the "Advanced" button and > > uncheck "Clip features to canvas extent". > > > > Nyall > > > > > > > > > > > > You can find a GIF here that displays my problem : > https://zupimages.net/viewer.php?id=21/02/nvr2.gif > > > > > > Circles are symbols via Symbology. > > > Strokes are symbos on points generated vith the tool "Points along > geometry". > > > > > > You can see that circles are not always at the same place as the > strokes. > > > > > > Is it a "normal" behavior ? > > > Anyway as a user I would expect that symbols are always generated at > the same place from the starting node. > > > > > > Thanks for your enlightments on this. > > > > > > Jérémie. > > > _______________________________________________ > > > Qgis-user mailing list > > > [email protected] > > > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > > > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > > > > > > _______________________________________________ > > Qgis-user mailing list > > [email protected] > > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > > > > > > > > _______________________________________________ > > Qgis-user mailing list > > [email protected] > > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user >
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