Reduce size of ROOT TGeo visualization output in notebooks

Geometry
21

In such case I need to get your data.
Can you upload such geometry as ROOT file here?

22

Sure, here it is: single_neuron.root (357.6 KB)

23

Hi,

I do see difference when using “all” option:

http://jsroot.gsi.de/latest/?file=../files/tmp/single_neuron.root&item=biodynamo
http://jsroot.gsi.de/latest/?file=../files/tmp/single_neuron.root&item=biodynamo&opt=all

Did you try to zoom in - for me rendering by default zoom factor is not nice:

http://jsroot.gsi.de/latest/?file=../files/tmp/single_neuron.root&item=biodynamo&opt=all;zoom30

You could use “all;zoom30” as draw options.
Actually, these options can be used for any TGeoVolume - no need to specify TGeoManager.

Regards,
Sergey

24

What do you mean with:

Actually, these options can be used for any TGeoVolume - no need to specify TGeoManager.

I do the following as you suggested before:

const char *opt = "all";
canvas_->GetListOfPrimitives()->Add(gGeoManager, opt);

This for me does not show all the objects (also zoom30 does not change for me). Did you draw those inside a TCanvas? I cannot tell from your links.

25

I only mean that you can use again:

canvas_->GetListOfPrimitives()->Add(topVolume, opt);

Strange. I trying with standard notebook demo - both adding topVolume and gGeoManager accept draw options.

In my links I showing functionality of JSROOT - no TCanvas, no iPython Notebook.
Just how options changing the drawings.
But exactly same options you should be able to use in your notebook code with TCanvas.

26

Okay, so it seemed that the call to gGeoManager->GetTopVolume()->Draw() (that I included just for comparison) messed up the call to canvas_->Draw() somehow. Once I removed that, it showed all the objects (thanks to the all option).

Thank you very much for your help Sergey! Now I can finally have nice-looking notebooks :smile: