Hi Andreas, I'm the funder, Hugo Mercier from Oslandia is the developper. It's the right time to do some teasing I guess ;-).
The inverted polygon renderer idea appeared when writing specifications for an improved mask tool . We will soon release new version of mask plugin that allows the following: - generate a ROI layer from current polygon selection, or from another plugin's call. - Label features of layers only for objects intersecting the mask region (several spatial operators inside). Users wish that a lot to do professional mapping. Unwanted side effect is that labeling is a lot more readable by giving more affordable space to labeling engine. - Automagically reuse current mask style to generate a mask on the fly on Atlas coverage feature. inverted style + shapeburst give crazy cool rendering! Another positive point, instead of making a big bbox with a hole, as current mask plugin does, an inverted style allowed a much cleaner solution, and sounded a lot more reusable. And now, it's much more clear for the user to be able to zoom to the layer extent and not be zoomed out far away. We were unsure about real performances of such spatial filtering, so we decided to start with a plugin, and share with you.. And, we found that filtering labels gives less work to pal engine, so the spatial intersection seems to be less consuming than labeling, for average layers. Many thanks to Oslandia Team and Hugo for the hard work. We're about to release the plugin, Hugo will launch a thread about this, and maybe a port to core, if you like it. I already see what we could do next, like label features only on the parts really intersecting that ROI.. Stay tuned! Régis -- View this message in context: http://osgeo-org.1560.x6.nabble.com/Question-on-inverted-polygon-renderer-tp5146099p5146162.html Sent from the Quantum GIS - Developer mailing list archive at Nabble.com. _______________________________________________ Qgis-developer mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-developer
