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by Mark Szlazak
Wed Jan 08, 2020 4:18 am
Forum: Open discussion
Topic: About funding and all that
Replies: 145
Views: 17933

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: 74
Views: 6009

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: 74
Views: 6009

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: 74
Views: 6009

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...
by Mark Szlazak
Sat Dec 21, 2019 11:44 pm
Forum: Assembly
Topic: Assembly3, A2plus, Assembly4? Get united!
Replies: 74
Views: 6009

Re: Assembly3, A2plus, Assembly4? Get united!

... The fragmentation caused by all the different approaches to the assembly problem are counter productive and should not really happen. ... There is no fragmentation. Because free software is not intelligent design, it's evolution. Originally there was Assembly2. As this project died out, A2plus ...
by Mark Szlazak
Sat Nov 30, 2019 11:15 pm
Forum: Assembly
Topic: Reimplementing constraint solver
Replies: 59
Views: 4085

Re: Reimplementing constraint solver [BFGS solver is up!]

I have this one. Might help. https://drive.google.com/file/d/1Z_rX5Eci1E3PHQXJWbswlOtjp_RH63MU Thank you, now I got it. Unfortunately, it isn't the exact book I was after. The book I found was "Numerical Optimization" by Jorge Nocedal and Stephen J. Wright. The one you sent me is "Numerical-Methods...
by Mark Szlazak
Sat Nov 30, 2019 6:29 am
Forum: Assembly
Topic: Reimplementing constraint solver
Replies: 59
Views: 4085

Re: Reimplementing constraint solver [dogleg solver is up!]

back in the days when I implemented dogleg and LM solvers I closely followed a paper (or excerpt of a bock, not sure anymore). This one, maybe? https://link.springer.com/chapter/10.1007%2F0-387-22742-3_18 I have this one. Might help. https://drive.google.com/file/d/1Z_rX5Eci1E3PHQXJWbswlOtjp_RH63MU
by Mark Szlazak
Tue Nov 05, 2019 9:37 pm
Forum: Assembly
Topic: Reimplementing constraint solver
Replies: 59
Views: 4085

Re: Call for team! Reimplementing constraint solver

In case you missed it, Ben Kenwright, the author of the Dual Quaternion papers people have posted, has authored a paper on programming rigid body constraint and physics solvers. Maybe the approaches are similar for constraints solvers alone or they could be made compatible with a future solvers that...
by Mark Szlazak
Thu Oct 31, 2019 9:50 pm
Forum: Developers corner
Topic: Adventure of fixing sketcher solver for large sketches
Replies: 16
Views: 974

Re: Adventure of fixing sketcher solver for large sketches

Back then when I tried to write a 3d solver for assemblies I failed for that very reason: standard numeric solvers are unable to cope with the fact that rotational and transitional degrees of freedom have different sensitivities, a unit change in the parameter leads to to massively different change...

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