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by lambda
Mon Oct 30, 2017 9:11 pm
Forum: Open discussion
Topic: topological identification of vertexes on a part
Replies: 17
Views: 1342

Re: topological identification of vertexes on a part

This is a nice heuristic, which might give good results if combined with other heuristics. There are two downsides though: 1) I think many parts have to many symmetries, where vertices just don't get a unique value. Maybe you can provide a macro that does the calculation, so we can run it on our mod...
by lambda
Mon Oct 30, 2017 5:35 pm
Forum: Draft, Arch & BIM
Topic: Parametric Arch modelling
Replies: 13
Views: 1530

Parametric Arch modelling

Hi, this post is a combination of giving feedback, asking for feedback/review and exploring some ideas about future Arch tools. One of the reasons I'm writing this, is because this sentence in the Arch roadmap kind of provoked me. I hope this turns into a useful discussion: Mech engineering parametr...
by lambda
Wed Oct 25, 2017 8:17 am
Forum: Help on using FreeCAD
Topic: Arch Wall doesn't follow base sketch
Replies: 1
Views: 333

Arch Wall doesn't follow base sketch

Hi there, this is a really strange problem: I have a simple model with just a base face and 3 walls of different thickness. Each wall is using previous walls as external geometry. Everything works fine, except that one line in the base sketch of the third wall isn't actually covered by a wall. There...
by lambda
Wed Oct 18, 2017 9:05 pm
Forum: FEM
Topic: Materials dialogue problem
Replies: 58
Views: 4373

Re: Materials dialogue problem

8-) as everywhere. :o Actually, it is particularly bad for me at the moment. Simply open the Fluild material dialogue with Air as depicted in my first post. Close it and reopen it again. Now check if the values have changed. Look for changes like: -Values grow each time you reopen ... 1.2 becomes 1...
by lambda
Wed Oct 18, 2017 5:35 pm
Forum: FEM
Topic: Materials dialogue problem
Replies: 58
Views: 4373

Re: Materials dialogue problem

Could you please test this. Its really important for me. I will do, but I'm on a tight schedule at the moment and have a hard time fitting FLOSS work into the breaks between my job. However it would help a lot, if you could describe which tests you did already yourself and what the results have bee...
by lambda
Mon Oct 16, 2017 7:32 pm
Forum: FEM
Topic: Materials dialogue problem
Replies: 58
Views: 4373

Re: Materials dialogue problem

Hi, I haven't had time to test you changes yet. However some remarks from just looking at code that I mostly don't understand: 1. I think the code you propose is just a complicated version of saying if 'Density' in matmap: density = FreeCAD.Units.Quantity(matmap['Density']) self.form.input_fd_densit...
by lambda
Sat Oct 14, 2017 1:20 pm
Forum: FEM
Topic: Materials dialogue problem
Replies: 58
Views: 4373

Re: Materials dialogue problem

But, starting with 'LANG=C' does not resolve the problem, nor using '.' instead or ','. :? BR, HoWil That's strange, so I looked into this a bit more and realized a couple of things: * reading 'man 7 locale' I realized that 'LANG' is not the only environment variable affecting locales. There is als...
by lambda
Tue Oct 10, 2017 5:21 pm
Forum: FEM
Topic: FEM useless at the moment?
Replies: 17
Views: 1174

Re: FEM useless at the moment?

Actually there is nothing wrong with the constraints I think. I do some thermal simulations with FEM too and it works for me. I think something with your body is wrong: Maybe it is not a solid or compsolid? I suggest first trying some primitive part like a cube. Also makeing a sketch in 2D and the e...
by lambda
Tue Oct 10, 2017 5:11 pm
Forum: FEM
Topic: Materials dialogue problem
Replies: 58
Views: 4373

Re: Materials dialogue problem

PR for the ThermalConductivity Problem:
https://github.com/FreeCAD/FreeCAD/pull/1032

Turns out this was unrelated to the original issues discussed in this thread. Sorry for hijacking the topic.
by lambda
Tue Oct 10, 2017 9:06 am
Forum: FEM
Topic: Materials dialogue problem
Replies: 58
Views: 4373

Re: Materials dialogue problem

@HoWil: It seems like FreeCAD has no built-in declaration and definition for Unit::VolumeExpansionCoefficient. I still don't understand how the Units system works, but maybe that's why in your example this value doesn't seem to parse at all? The rest looks like locale issues to me. That's different ...

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