delhanty (u/delhanty)

delhanty commented on Dropbox Passwords Discontinuation help.dropbox.com/installs... · Posted by u/Shank

pipes · 12 days ago

I've been a paying user for years. Their desktop UI is awful. They introduced a feature that took me hours and hours to disable (the file not downloaded until you try to open it thing). One bit of documentation pretty much lied about turning it off. Turned out it had to be disabled in more than one place.

I still use them as I don't have time to move else where. Plus they run on Linux and windows which is what I need.

I wish they had "I'm only interested in file sync" mode so that the whole mess of other features is hidden from me.

delhanty · 12 days ago

> They introduced a feature that took me hours and hours to disable (the file not downloaded until you try to open it thing). One bit of documentation pretty much lied about turning it off. Turned out it had to be disabled in more than one place.

Are you able to say what the relevant settings are? (I would like to be able to do that too ...)

delhanty commented on Why I left my tech job to work on chronic pain sailhealth.substack.com/p... · Posted by u/glasscannon

algo_lover · 2 months ago

Why do all such articles never talk about the meat of the solution? Why do I always feel like I'm being sold something.

Why is it so hard to explain the solution briefly, or directly present it to me upfront. Why does it need so much of mystery around it?

In this article the OP does not even mention "Pain reprocessing theory" which is what they seems to be talking about (based on the study they have linked)

delhanty · 2 months ago

As someone who has been mitigating and managing chronic pain for 25 years, with respect IMO your expectation is unrealistic.

There isn't a "solution" - you're looking at a life-long mitigation and management strategy that will not be "brief".

The time commitment typically goes up as one ages. I could spend 40 hours a week on nutrition, exercise and relaxation if I was trying to optimize for chronic pain reduction.

But then nothing else would get done.

delhanty commented on History of CAD shapr3d.com/blog/history-... · Posted by u/nill0

nraynaud · 6 months ago

I don't seem to find a dead tree version of the book. I don't know how much work it entails, but maybe the profits of such a sale could go to the good cause they were advertising?

Maybe it's the right opportunity to ask if you know a good online service for printing/assembling of big documents.

delhanty · 6 months ago

>Becoming a book publisher wasn’t on my bingo card when I started Shapr3D. Yet here we go! For now, it’s only available to select customers—but if there’s enough interest, we’ll make it accessible to the public. The book spans 860 pages and weighs approximately 3 kg—just as heavy as CAD is.

Become a select customer of Shapr3D and their CEO István Csanády might send you one.

https://twitter.com/istvan_csanady/status/188829861216722566...

delhanty commented on History of CAD shapr3d.com/blog/history-... · Posted by u/nill0

delhanty · 6 months ago

Seeing as David Weisberg's "History of CAD" is trending today I submitted "History of Unigraphics" by 3 of the original Unigraphics 7 dwarfs.

Edit: Unigraphics X SDRC became the system we know today as Siemens NX

It came out at the end of 2024 - these guys must all be around 80 by now.

https://news.ycombinator.com/item?id=43169194

delhanty commented on Unigraphics, 1974–2001 computer.org/csdl/magazin... · Posted by u/delhanty

delhanty · 6 months ago

Seeing as David Weisberg's "History of CAD" is trending today, I submitted "History of Unigraphics" by 3 of the original Unigraphics 7 dwarfs.

The article came out at the end of 2024 ... these guys must all be around 80 by now.

Edit: Unigraphics X SDRC became the system we know today as Siemens NX

delhanty commented on Show HN: Hestus – AI Copilot for CAD hestus.co/... · Posted by u/kevinsane

gerdesj · a year ago

I am not an expert but surely an under constrained sketch is not a completed sketch.

Does "fully constrained" mean the simplest set of constraints that yields a shape (volume/hypervolume)? Or something rather more complicated? A simple yes or no, with a pointer to a paper will do!

delhanty · a year ago

"fully constrained" means that there are no degrees of freedom left so that there are only a finite number of valid solutions, which are then consequently disconnected in the space of possible solutions.

DCM then chooses one valid solution that it believes is "close" to initial supplied positions/directions/radii etc for the geometry.

delhanty commented on Show HN: Hestus – AI Copilot for CAD hestus.co/... · Posted by u/kevinsane

delhanty · a year ago

Good luck guys! I watched the video on YT - hopefully will get around to trying the Fusion 360 add-in at some point.

Does the current add-in use AI at all?

What is your plan when, in the event of you getting some traction, Autodesk etc. copy you innovations into the main product?

As per my other comments [1][2], I worked on this area at D-Cubed and Solidworks from 1995 to 2002. Feel free to connect with me via twitter DM @delhanty [3].

[1] https://news.ycombinator.com/item?id=41440016

[2] https://news.ycombinator.com/item?id=41440150

[3] https://twitter.com/delhanty

delhanty commented on Show HN: Hestus – AI Copilot for CAD hestus.co/... · Posted by u/kevinsane

acyou · a year ago

Thank you for the great response, that does mirror my experience, those tangent curves want to flip/change direction.

I can't believe that all of Fusion, and many other CAM software, is built on such a shaky "sketchy" foundation. It seems that in general 2D sketch constraint models are far from solved in computer science, this seems ridiculous as such a basic and elementary problem. It should be so obvious that the tangent doesn't want to go back on itself to create zero thickness geometry.

Wonder if the 2D sketch experience is much better in Onshape, NX, Catia, etc?

delhanty · a year ago

> Wonder if the 2D sketch experience is much better in Onshape, NX, Catia, etc?

Well those systems and pretty much all of the mechanical CAD industry is built upon D-Cubed's DCM, so I'd expect the behaviour to be the same.

If I was creating a new 3D CAD system from scratch now I'd probably license Parasolid eventually, but I'd pass on DCM.

I don't want to dump on D-Cubed and John Owen though. I have huge respect for him and the company he created. This is technical criticism with the benefit of hindsight.

delhanty commented on Show HN: Hestus – AI Copilot for CAD hestus.co/... · Posted by u/kevinsane

acyou · a year ago

Nice work!!

I tried to run it, but got an API Error:

Due to some internal changes made to the Fusion API, the Add-In: 'sketch_helper' from 'Hestus, Inc.' cannot be loaded. You need to install a new version of the Add-In that is compatible with this version of Fusion.

Can you just put it up on the Autodesk app store?

I struggle with this model, because of the capture by Autodesk and the other CAD providers. If you read the Autodesk EULA, I think it prohibits use of any open-source software in these add-ins. And I don't think anyone can use this software outside of Fusion 360. And if this add-in becomes popular, Autodesk can trivially release something that has the same functionality, built into Fusion 360 by default. And, as you are no doubt painfully aware, the Fusion API can be limiting.

If you can have your LLM ingest a non-parametric CAD model and spit out a parametric model with a beautiful, complete, editable feature tree full of Extrudes, fully defined parametric sketches with these nice constraints, all tied to the sketch origin, now that's something.

I think Autodesk BIM is $5000/mo/user, Fusion is $500/mo/user. I have thought that means the money is in architectural/structural.

As a side note - one other tip I have, for all CAD users everywhere: avoid Tangent relationship wherever possible! Stick to vertical/horizontal on the lines and arc endpoints, and you will be golden. The Fusion sketch solver is badly compromised, it can't do more than two or so simple successive Tangent relations without bugging out. And, my experience with Solidworks is the same, not sure if this is still true.

Curious if you dealt much with the Fusion constraint model, and have any insights into why it works so poorly, or even how it works? Many times, you click on a line, and it turns from blue to black, and back to blue again.

delhanty · a year ago

> And if this add-in becomes popular, Autodesk can trivially release something that has the same functionality, built into Fusion 360 by default. And, as you are no doubt painfully aware, the Fusion API can be limiting.

This is always the problem with add-ins like this as a business - you're essentially doing free market research for the application vendor.