Draft Angle Analysis - Mid Draft Curve weird results

In this image, a mid draft curve produced by the Draft Angle Analysis command is highlighted in green. I’m pretty sure there’s some sort of glitch. Point objects are at polysrf edge quads.

Most of the draft curves created for this object worked fine, just a few of them did this.

Any thoughts as to what’s up?

Link to file: iCloud

This might be a tolerance thing. If I have this situation (and don’t like to change the file settings) I scale up by factor 10 or 100, do the extract and scale back down.

I’ll try that, thanks.

Hi Max -
Scaling by 10 seemed to work fine here.
I’ve put this file on the list as RH-59095 so that a developer can take a closer look.
-wim

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Draft curves are still completely useless.


Version 7 SR27
(7.27.23032.13001, 2023-02-01)

I tried refining my mesh using GH’s “TriRemesh” component, but the result is still desastrous.


This Draft curve tool is just a farce.

I managed to make a decent curve with some Grasshopper, but I think that this draft curve tool should be made to work properly with meshes.
If not, it would require to systematically reverse-engineer meshes to create a decent curve, which is way more work than creating the curve by hand !

what tolerances are you using?

Also I’ve never used it on a mesh. I use it on Nurbs and SubD and it works fine.

I don’t know how your solution with grasshopper works, but have also a look at this wonderful tool from Laurent > Divide mesh along contour line - #3 by laurent_delrieu

And it is now in my plugin Nautilus it is named mesh iso spliting.
One that outputs meshes
One that outputs curves

https://www.food4rhino.com/en/app/nautilus

It works like this :


2306_PROG_Draft curve.gh (79.0 KB)

The point in my rant is to say that McNeel should’nt put out lazy features like that.
If they don’t want to commit to doing a decent tool, then they should simply pull it out.
A lot of mesh tools are still like that by the way : lousy to the point of being useless.

Fantastic !
Sadly Food4Rhino is down at present

You can still use the one in @maje90 link.

No ! I want Nautilus. I suspect it’s a treasure trove I somehow overlooked !
:slight_smile: