make circular analog range setting work in ares

src/BizHawk.Client.Common/config/Config.cs

@@ -191,7 +191,7 @@ namespace BizHawk.Client.Common
 
 		public ClientProfile SelectedProfile { get; set; } = ClientProfile.Unknown;
 
-		// N64
+		// TODO: make this not N64-specific, it doesn't need to be
 		public bool N64UseCircularAnalogConstraint { get; set; } = true;
 
 		// Run-Control settings

src/BizHawk.Client.EmuHawk/MainForm.cs

@@ -872,8 +872,10 @@ namespace BizHawk.Client.EmuHawk
 
 				InputManager.ActiveController.LatchFromPhysical(finalHostController);
 
-				InputManager.ActiveController.ApplyAxisConstraints(
-					(Emulator is N64 && Config.N64UseCircularAnalogConstraint) ? "Natural Circle" : null);
+				if (Config.N64UseCircularAnalogConstraint)
+				{
+					InputManager.ActiveController.ApplyAxisConstraints("Natural Circle");
+				}
 
 				InputManager.ActiveController.OR_FromLogical(InputManager.ClickyVirtualPadController);
 				InputManager.AutoFireController.LatchFromPhysical(finalHostController);

src/BizHawk.Emulation.Common/Base Implementations/Axes/CircularAxisConstraint.cs

@@ -22,7 +22,7 @@ namespace BizHawk.Emulation.Common
 			var length = Math.Sqrt(xVal * xVal + yVal * yVal);
 			var ratio = Magnitude / length;
 			return ratio < 1.0
-				? ((int) (xVal * ratio), (int) (yVal * ratio))
+				? ((int) Math.Round(xVal * ratio), (int) Math.Round(yVal * ratio))
 				: ((int) xVal, (int) yVal);
 		}
 	}