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kotlinlang

Hello!
I can rotate an object on the screen using the mouse location and the `atan2` function.
As soon as I begin the rotation, the object jumps to point at the mouse location (rotation angle follows mouse angle), but I want to be able to *rotate the object _relative to_ the mouse angle.*
I can measure the difference between the current rotation, and the mouse angle when the rotation begins, but *I cant make the `diff` value remain constant during the rotation!*
I need to learn how you set a value once from other variables without it then constantly updating itself.
Can someone show me how? Thanks!

there seems to be a <#C01D6HTPATV|compose-desktop> channel here on slack that might be a better place to ask.

I really just need to know how to set a variable once from other variables, then have it become temporarily read-only, so it doesn't continuously recalculate itself based on the other variables changing.
This needs to happen regularly, not just once on app startup for example.