Hello there,
I recently ran into a problem while developing an RTS-style game. To be able to utilize correct RTS style controls, I have to enable the mouse cursor and set Input-mode to GameAndUI.
Now the problem is, if more units are on the screen and cpu usage goes up, rotating the camera gets slower and slower. I checked my implementations and it is not an interpolating or frame rate issue. The direct input axis values of mouse X and Y are just getting lower. I discovered the problem just recently after more and more aspects were finished and put together so CPU is more utilized.
I found an older post describing a the same behaviour i getting. The bug report was closed as not reproducable.
Post: https://answers.unrealengine.com/questions/340096/setting-showmousecursor-cause-mouse-free-look-lag.html
Bug report: Unreal Engine Issues and Bug Tracker (UE-24527)
I checked implementations of “ShowMouseCursor” or InputMode in Engine-Code, but I wasn’t able to track down the problem in any way.
Unfortunatly I do not have the time now to do an exact analysis and bug report tracking. But maybe someone also encountered it and found a workaround. Help would be appriciated 