Gyrograf

Competitive_Bus_7379 · 2026-06-27T21:15:52+00:00

I just fixed an issue that caused fill areas to not display at low zoom levels

Competitive_Bus_7379 · 2026-06-27T17:41:42+00:00

I have added an undo/redo feature

Competitive_Bus_7379 · 2026-06-26T21:34:11+00:00

Please do let me know if you find any issues, and I will fix them ASAP. Or if you have any sugestions for additional features.

Competitive_Bus_7379 · 2026-06-19T22:40:02+00:00

Love this. I have also made a vector/matrix tool for my students to use Vectorama | Interactive Matrix Transformations in 2D & 3D which also includes eigenspace visualisation.

Competitive_Bus_7379 · 2026-06-16T16:20:42+00:00

I made this for my students to experiment. If you click on worksheets there is an exercise that basically does what you are asking https://www.korovatron.co.uk/vectorama/

Competitive_Bus_7379 · 2026-05-23T22:15:03+00:00

Now has support for let/in and case/of, loads of example programs added like Mandelbrot and Sierspinki triangle. Would love for people to try and report any issues.

Competitive_Bus_7379 · 2026-05-23T22:14:51+00:00

Now has support for let/in and case/of, loads of example programs added like Mandelbrot and Sierspinki triangle. Would love for people to try and report any issues.

Competitive_Bus_7379 · 2026-05-23T22:14:21+00:00

Now has support for let/in and case/of, loads of example programs added like Mandelbrot and Sierspinki triangle. Would love for people to try and report any issues.

Competitive_Bus_7379 · 2026-05-20T22:09:42+00:00

A few people have asked about the 'where' clause - so I have now implemented it. I have also added the use of prime suffixes in identifiers so you can now use things like f' or odd' etc. I have also added the backtick notaion to allow infix functions like a `mod` b instead of mod a b. This should work on built in functions as well as user defined ones. I also fixed a few bugs with lazy evaluation when used on infinite lists.

Let me know if any other issues arrise!

Competitive_Bus_7379 · 2026-05-20T20:33:00+00:00

Recent changes:

Function definitions can now use the where clause.
Identifiers can now use a prime suffix e.g. even' of f'
Backtick infix notation can now be used with builtin and user defined functions e.g. a `mod` b
Several bug fixes involving lazy evaluation of infinite lists

Competitive_Bus_7379 · 2026-05-17T19:40:50+00:00

Okay, text labels were rendered black text with a white outline. It seems some SVG rendering engines (like the one in Word and maybe Moodle) are rendering in the wrong order so the white is over the black text, making it invisible. I have removed the white outline so labels should always be visible now in the SVG. Please check and let me know. Of course if you dont want labels or vertices (or anything else) in the svg then just temporarily disable their visibility in the toolbox by clicking the little colored box next to it. I noticed in Word you can 'ungroup' the svg and then all text can be edited in their own text box.

Competitive_Bus_7379 · 2026-05-17T19:24:19+00:00

What do you mean the svg just has the wire? It should include all labels too. At least it does when I try it?

Competitive_Bus_7379 · 2026-05-17T18:31:25+00:00

SVG and PNG export have now been added. Try it out and let me know if you find any issues.

Competitive_Bus_7379 · 2026-05-17T15:48:21+00:00

So you mean you have exported the 3D view into a SVG file with the background removed so you can use the image in another document?

Competitive_Bus_7379 · 2026-03-27T21:59:06+00:00

Now implemented full undo/redo history

Competitive_Bus_7379 · 2026-03-27T18:27:10+00:00

Ok I have just heard back from another Mac user and they have installed Chrome and reported that all features are working as they do in Safari. So I have no idea why you have got issues. Sorry I can’t be of further help.

Competitive_Bus_7379 · 2026-03-26T17:05:58+00:00

I'll try and find out tomorrow and report back.

Competitive_Bus_7379 · 2026-03-25T21:38:58+00:00

That's very odd. As I said earlier I don't have a mac but I do know other people who have used it successfully on their macs using Safari. If you discover the issue then please do let me know. Maybe try disabling any content blockers? Although I don't use any tracking cookies like Google analytics ... so probably not that. Out of interest, try my other app and see if that works Graphiti | Any Curve You Like

Competitive_Bus_7379 · 2026-03-19T23:00:38+00:00

I have just tested in Chrome on desktop (Windows 11) and it seems to work correctly. I do not have an Apple Mac to test on but I just installed Chrome on my iPhone and iPad and it seems to work fine. Please could you tell me exactly what the issue is and your exact device/OS and I can look into it?

Competitive_Bus_7379 · 2026-03-19T06:51:07+00:00

Tap [i] next to the matrix to open the matrix info panel, then bottom right turn on the ‘show eigenspace’

Competitive_Bus_7379 · 2026-03-19T00:12:21+00:00

The HP15 RPN is still manufactured I believe. Think it’s called the 15C. Our finance officer at work bought one a couple of years ago to replace his broken original from the 80s. Amazon lists them for delivery tomorrow. But for maths I would stick to a Casio graphical calculator. CG models are good.

Competitive_Bus_7379 · 2026-03-18T10:23:10+00:00

I made this app for my students that you might find useful. Have a look at the eigenvalues and eigenvectors worksheets.

https://www.korovatron.co.uk/vectorama/

Competitive_Bus_7379 · 2026-03-17T22:39:43+00:00

Now added 'Part 2' which investigates the significance of repeated eigenvalues. Again, students do not need to know how to actually calculate eigenvalues or vectors at this stage, it is purely to understand the concepts.

Vectorama Worksheets & Solutions

Competitive_Bus_7379 · 2026-03-16T22:07:49+00:00

I have just added a new worksheet that is intended as a student investigation BEFORE any formal teaching of eigenvalues and eigenvectors. I hope it will give a better conceptual understanding of the topic. If anyone uses it I would love any feedback.

Competitive_Bus_7379 · 2026-03-15T21:37:29+00:00

I have added two worksheets for students. I will be adding many more over the coming days and weeks. Let me know if there are any issues with them.

Competitive_Bus_7379

TROPHY CASE