[QGIS-Developer] Re : QGIS3D: Caching triangulation of terrain data

[Jean-Roc Morreale (ml)]

Hi Andreas,

If the point cloud data is static and used by several users, I usually
triangulate it once into its own seperate file (.ply, which seems to be
supported by Qt3DRender::QMesh) for further access.

For a generic cache, maybe 3D Tiles can fit the need for both mesh and
point cloud :
https://github.com/AnalyticalGraphicsInc/3d-tiles

Le vendredi 03 novembre 2017 à 17:28 +0100, Andreas Neumann a écrit :
> Hi,
> While exploring QGIS3D more, I noticed that my terrain is
> triangulated each time I load the project.
> I wonder if it wouldn't be better to store this triangulation along
> with the Geotiff storing the DEM, e.g. in a sidecar file. Terrain is
> pretty static. We only get updates of our LIDAR data every 5-10 years
> ... it doesn't make much sense to triangulate this data again and
> again.
> Is this something that could be improved in QGIS 3.2?
> Thanks,
> Andreas
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