SAC - Loop geometry with target elevation

[kaushik960]

Hi,

I have created a subassembly with loop geometry targeting an elevation. I have limited the no. of loops based on elevation. There is no target surface for the loop. 

It is working fine for fill condition; however, the loop geometry is failing to execute in cut condition.

The subassembly is in the attachments.

Thanks,

Kaushik Mondal

[stevenh0616]

Hi @kaushik960,

It looks to me that it's not computing the correct number of loops in the cut situation. You can set the target elevation up to 19 and it works. If you go over 20, it fails to update correctly - which looks like it's in this last decision the Loops is returning 0 or less than 0.

I haven't found exactly where the issue is above that just yet....

[cwr001 · Accepted solution]

In my opinion "Loop-geometry" is a bit of a wonky node - I've experimented with it but it seems buggy to me (but maybe I'm just stupid, that's equally likely).

My guess is that although you have the option to specifiy "None" as surface target, this node actually needs a surface input.

To illustrate my point, I added a "DummySurface" to your Assembly that does nothing, except floating in space as cut or fill and that I set as the surface target for the loop node. And suddenly, your assembly works (don't ask me why, exactly).

Maybe there's an error somewhere else but I wasn't able to find it and I therefore think that it's "Loop geometry"'s fault! 🙂

[stevenh0616]

Nice find @cwr001 ... that seems like a defect in that node if it's not generating correctly when there's no surface target set. I was able to replicate your same findings and it appears to be working in Cut and Fill modes now too.

[kaushik960]

Thanks @stevenh0616 and @cwr001 for your responses.

Loop geometry node is definitely the faulty one and does not work in cut condition without a surface.