Move an object along a line

I am assisting someone with their shooter and I am trying to work on a new movement concept for said game.


I want to have an invisible circle in the middle of the screen with the ship on the edge of the circle. When you push a direction, it moves the ship along the circular path without being able to deviate from it.

How would I go about this in the most efficient manner?


Attachment 15685

Well, if you don't want to use maths, you can use an extra active object to control the circular movement, and then just attach the ship object to that. Check this example:

Attachment 15687

That seems to work very well! Question tho; how would I speed it up?

In the expressions for the events that rotate the object, just increase the 1.