LCD.image, image rotation

[jwrm22]

Hi there,

I've got an angular sensor mounted on a dial and I would like to rotate my virtual dial (image) to the measured angle.
This is not trivial but I expect someone else must have solved this problem all ready.

The sensor is 12bit or ~4k different angles. For simplicity 400 angles would be sufficient.
What I came up with is to create 400 images, each with a different angle and draw the image accordingly.
The other solution would be to draw the image myself by pixel manipulation, this is possible but will take a lot of effort.

Secondly I would like to have the center of rotation outside of the screen so I can do something like this:

I did see an example of this but cannot find the example.
I believe it was a radio tuner with an oled display that did exactly what I'm trying to do.

Thanks for the help.

[jwrm22]

I have found the example I wrote about in the first post.
It does not seem to rotate images but generates the dial in the fly.

It's a very cool project anyways:
https://tj-lab.org/2019/02/17/vfo5/

[jwrm22]

At this moment I don't think the tools exist to rotate images on the screen.
I've made an attempt at creating the 400 sprites and it's for now the best solution.