buildTiledModel() optimal parameters

[andrevall]

Hello everyone,

when we build a Tiled Model from the GUI, the "Pixel Size" parameter is calculated automatically, and the "Face Count" parameter can be one of [High,Medium or Low].
I was wondering what are the equivalent parameters that we should pass to the  buildTiledModel() Python function? How can we calculate the pixel_size number automatically, as it is in the GUI, and set the face_count number so that it is equivalent to "High" in the GUI?

Thank you very much in advance,

Andrea

[Alexey Pasumansky]

Hello Andrea,

You can leave pixel_size undefined in order to use the default value.

Face count defines the number of polygons in each tile: Low - 4 000, Medium - 20 000, High 100 000. The default option is Low. Higher value is reasonable, if you are using larger tiles.

[andrevall]

Thank you Alexey,

that was really useful. I would also like to ask what is the purpose of the "keep_depth" parameter: if I try to use the function buildTiledModel() with depth maps as data source (source_data = Metashape.DataSource.DepthMapsData), I get the error "Null depth maps", so I guess we need to compute the depth maps manually before computing the tiled model, by using the buildDepthMaps() function
So, in this sense, what is the role of the "keep_depth" parameter in the buildTiledModel() function, since the depth maps have to be computed in advance?

Once again thank you very much,

Andrea

[Alexey Pasumansky]

Hello Andrea,

If you are using DepthMapsData as a source option for tilde model generation, the depth maps should be already present in the project, generated by buildDepthMaps command.

If you set keep_depth argument value to False, the depth maps will be removed from the project after completing the tiled model generation task.

[andrevall]

Thank you Alexey,

as always very helpful

[bosscq]

Hello

if I don't pass pixel_size parameter,
I got "Exception: Zero resolution"
I started from importing external mesh.
then executed "chunk.buildTiledModel(source_data=Metashape.ModelData)"
any idea?

regards