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by Mark Szlazak
Tue Mar 31, 2020 12:52 am
Forum: Assembly
Topic: Challenge: Constant Velocity Joint (M. Gesik)
Replies: 29
Views: 2090

Re: Challenge: Constant Velocity Joint (M. Gesik)

ppemawm wrote:
Mon Mar 30, 2020 11:38 pm
BTW these two models would make terrific FreeCAD splash screens provided proper attribution is given to the inventor.
My thoughts as well.
by Mark Szlazak
Sat Mar 28, 2020 10:25 pm
Forum: Assembly
Topic: Reimplementing constraint solver
Replies: 257
Views: 12417

Re: Reimplementing constraint solver

OH OK.

Anyway, here is some more.

Wolfram Alpha has some widgets for Simpson's rule and others that might help. I have never used them.

http://blog.wolframalpha.com/2013/07/11 ... tegration/
by Mark Szlazak
Sat Mar 28, 2020 9:35 pm
Forum: Assembly
Topic: Reimplementing constraint solver
Replies: 257
Views: 12417

Re: Reimplementing constraint solver

@abdullah I know you can use sage. Can you please figure out average value of fourth derivative of sqrt(sq(a*cos(u)) + sq(b*sin(u))) across the period? I'm trying to find out, how many slices should I take for length integration for arc ellipse to achieve a cretain precision, using Simpson's rule ....
by Mark Szlazak
Wed Mar 25, 2020 4:57 pm
Forum: Assembly
Topic: Reimplementing constraint solver
Replies: 257
Views: 12417

Re: Reimplementing constraint solver

There are some requirements: ... I know DeepSonic has been re-implementing things with (dual?) quaternions and i got interested in them with regards to screw-displacement theory. I do not know if that is the direction this could evolve with regards to 3d-constrains in sketches and assemblies. In an...
by Mark Szlazak
Wed Mar 25, 2020 3:17 pm
Forum: Assembly
Topic: Reimplementing constraint solver
Replies: 257
Views: 12417

Re: Reimplementing constraint solver

My apologies if this is not the right place for these questions.
Does your program provide "under-constrained", "fully-constrained" and "over-constrained" feedback?
If so what technique/algorithm is used to determine those conditions?
Thanks.
by Mark Szlazak
Wed Jan 08, 2020 4:18 am
Forum: Open discussion
Topic: About funding and all that
Replies: 155
Views: 19411

Re: About funding and all that

How about this project?

phpBB [video]


See if they might fund you for FreeCAD work.
by Mark Szlazak
Mon Dec 23, 2019 12:24 am
Forum: Assembly
Topic: Assembly3, A2plus, Assembly4? Get united!
Replies: 105
Views: 10199

Re: Assembly3, A2plus, Assembly4? Get united!

I see several possible flawed assumptions on your part that lead to false analogies. ... Blerg. I'm going to stop talking to you because you want to nitpick the meaning of evolution instead of dealing with the topic. Be pedantic then. You say there was no cooperation between ASM developers. I never...
by Mark Szlazak
Sun Dec 22, 2019 11:42 pm
Forum: Assembly
Topic: Assembly3, A2plus, Assembly4? Get united!
Replies: 105
Views: 10199

Re: Assembly3, A2plus, Assembly4? Get united!

... IMHO, generally there isn't anything particularly great with a dumb evolutionary approach over a intelligent coordinated communal approach. ... Evolutionary strategies are great, introducing randomness is a great way to reach to solutions that nobody thought before. The very process of open sou...
by Mark Szlazak
Sun Dec 22, 2019 11:39 am
Forum: Assembly
Topic: Assembly3, A2plus, Assembly4? Get united!
Replies: 105
Views: 10199

Re: Assembly3, A2plus, Assembly4? Get united!

IMHO, generally there isn't anything particularly great with a dumb evolutionary approach over a intelligent coordinated communal approach. Talking about optimization strategies... Local optimization always has the potential to get stuck at one point. So some diversity is unavoidable to overcome su...

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