limit mouse movement within the ring at the bottom of the screen

Development Programming & Scripting
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1

How to limit mouse movement within the ring at the bottom of the screen? I’m new to ue5 so would appreciate a detailed answer, thanks a lot in advance

2

might require a bit of math on your part for the region you want to “constrain” the mouse to:

  • inherit from PlayerController
  • in Tick() get the current mouse position and put it into a Vector2D ConstrainedMouse
  • modify ConstrainedMouse to the region you want the mouse to be constrained to
  • set the mouse position to the ConstrainedMouse

this method works best with rectangular regions, but circles are doable by treating the ConstrainedMouse as a distance calculation

to save on the square root each frame figure out the squared radius of you circle (if you are going to have variable window size/resolution you will need to get the Window size and resolution to figure out the center)
then take the known center point of the circle and do a SquareDistance to the CurrentMousePossition
if the value is less then your SquareDistance then do nothing with the vector
else ConstrainedMouse =(CurrentMousePossition - CircleCenter) and call Normalize

ConstrainedMouse = CircleCenter+(ConstrainedMouse * radius // you should square root at this point from the held the RadiusSquared

from a user perspective please have this be temporary/situational or at the least make it so that like the pause menu allows for free mouse movement. also if the application is in Windowed Mode or Borderless Windowed mode the mouse in the application may be constrained, but the according to the system it can escape the confines of the game window especially with multiple display setups.