Excellent 3D Graphics thing at math3d.org

[George Keeling]

TL;DR

I was doing some Tensor Analysis problems and wanted to visualise some. Excellent results at math3d.org!

May I recommend math3d.org as a website for making 3D-Graphics for fresh_42's page on List of Online Calculators for Math, Physics, Earth and Other Curiosities.
I also might recommend cloudconvert.com to make .gifs. It is simpler than ezgif.com, mainly because it is not so feature rich.

Here are some examples which I made to visualise the answers that I was getting while doing some tensor analysis problems which were recommended by two of my mentors here:

I know which textbook I would suggest ... but I am quite biased on the matter ;)

I can warmly suggest:
https://www.taylorfrancis.com/books...l-methods-physics-engineering-mattias-blennow

The book is a feast of problems

Plane, normal vectors and one more Play at https://www.math3d.org/fq5CtGqYa

Paraboloid, tangent surface and normal vector. Play at https://www.math3d.org/ybhLm7KGb
I also used Debut Video Capture to make a .avi from math3d for this.

Sine wave and tangent vectors. Play at https://www.math3d.org/D8xf0gZMT.

 

[fresh_42]

Both added, many thanks, and Debut installed!

 

[fresh_42]

By the way, the list could have more curiosities like this hovercraft lift calculator. If anyone has something similar funny, please tell me!

 

[pbuk]

Both added, many thanks, and Debut installed!

Although it isn't, this mention in this thread could be construed as a recommendation for this Debut thing. There are many screen recorders and I can see no reason to recommend this one over any other, and one reason NOT to recommend it is its opaque 'free' license (its commercial license which appears to normally cost USD70 is less opaque).

I use OBS which is truly free (open source) software. It does have a steep learning curve and it contains hardly any post-processing features, but on the basis of 'one tool one job' I don't find this a problem.

 

[pbuk]

By the way, the list could have more curiosities like this hovercraft lift calculator.

Which one (missing link)?

 

[fresh_42]

Which one (missing link)?

https://hoverhawk.com/lcalc.html

But color, Hawking, and blackbody radiation are funny, too. Not as funny as hovercraft, but unusual. We could need some fluid dynamics calculators or ideal gases.

 

[Swamp Thing]

By the way, the list could have more curiosities like this hovercraft lift calculator. If anyone has something similar funny, please tell me!

This one isn't a curiosity or a funny thing, but might be useful to many on the forum, so fresh_42 please consider adding it to the list.
RF Inductance calculator : https://hamwaves.com/inductance/en/index.html#input

If you scroll down below the calculator, there is also some interesting stuff about the physics of high frequency solenoid inductors and how they are modeled.

 

[Swamp Thing]

We could need some fluid dynamics calculators or ideal gases.

Here's an online calculator that does heavy number theory stuff, plus various general math functionalities.

It's also available as source code and installable binaries. It seems to be consistently maintained and has a good user base among mathematicians/number theorists.

https://pari.math.u-bordeaux.fr/gp.html

There's a non-trivial learning curve, but I think many would find it worth the effort.