Hi all This is indeed awesome ! Régis, you really should pass this kind of snippet to a broad audience (if you have time, of course). I do not know if the new QGIS sharing tool is the right target, or a quick blog post ?
Cheers, Michaël 2017-01-03 11:31 GMT+01:00 Régis Haubourg <[email protected]>: > > > 2017-01-03 5:44 GMT+01:00 Nyall Dawson <[email protected]>: > >> >> >> I'd say the preferred solution would be a 3d viewer using the Qt 3d >> framework (http://doc.qt.io/qt-5/qt3d-examples.html). Then it could be >> built in as core functionality instead of as a python plugin (or >> relying on a js framework). We'd gain lots of benefits to this >> approach, including: >> - could be used with a multi-canvas view, with a mix of 2d/3d views >> - could potentially reuse existing symbology as surface materials >> - could do nifty things like embedding an interactive 3d view in a >> composer >> - could potentially replace the globe plugin > > > Yes I forgot to mention Qt3D. That would be good to know if someone has > already played with it. > > > >> So something like: >> z(point_n($geometry,@geometry_point_num)) > > > Thanks for the pointer, That works with that expression on a Marker Line > easily to draw vertical edges. See the screenshot here > http://imgur.com/RPtOjMg > > > >> > > Throw that inside some type of data defined override and you can style >> a geometry's nodes based on their z value. >> >> A geometry generator using segments_to_lines and geometry_n can style >> a geometries segments based on their z/m values too. >> > > Wow I just realized that you can combine a geometry generator inside a > marker line. Win!!! > > I used that expression, creating a line for each marker with a y > translation using z value: > > make_line( translate(point_n( $geometry, @geometry_point_num ), 0 , > -z(point_n($geometry,@geometry_point_num)) ), translate( point_n( > $geometry, @geometry_point_num +1 ), 0 , > -z(point_n($geometry,@geometry_point_num+1)) > ) ) > > See http://imgur.com/TlCN7zf > > > and a video just to underline the immediate feedback when editing :) > > https://youtu.be/o_lAeKJhRkg > > > > Thanks again Nyall, QGIS always allows a lot more than we think. So > great.... > > > _______________________________________________ > Qgis-developer mailing list > [email protected] > List info: http://lists.osgeo.org/mailman/listinfo/qgis-developer > Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-developer >
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