dop2000 I'm afraid I'm making it more tricky.
It's hard to describe, but the way in which my actual test works is making use of the Paster Plugin. I try to keep my requests for help plugin free, thus the random grid example.
My version is pasting an image of a sprite that's offscreen and making it rotate purely via the paster (meaning the off-screen sprite isn't actually rotating, but only the paster 'camera' is, not the paster screen).
Sorry... I know it sounds complicated.
My previous example, it turns out, didn't express this correctly.
While the mouse cursor is over the paster screen, a fake mouse cursor appears over the off-screen sprite in the position the mouse is currently hovering over on the paster screen.
I hope some of this helped explain what I'm trying to do, but I wouldn't be surprised if it just confused you.
In any case, I've altered the original capx to show what I mean. Now, when you click on the sprite on the right, instead of creating a sprite on the left, it will create a sprite where it thinks the mouse cursor is based on the cos/sin.
Note that when the sprite on the right ISN'T rotating, clicking on the sprite puts it in the right position, but when you DO spin it, after a short while, the positioning gets further and further away from the mouse position.
Do you know of a way to ensure that the version of the right utilizes the cos/sin code? Again, I can't just use the mouse position as the real items is off-screen.