Switching to CursorLockMode.Locked causes MouseLook to jump (with solution)

I had a problem, couldn't find a good answer in the forums, so I created this one. It might help someone else so I thought I'd post it.

I have a game where the user regularly has to switch from using the FPS controller to UI elements.

To do so, I modified MouseLook.cs to check if (Cursor.visible==true) and return in the LookRotation function.

However, every time after the cursor is locked after doing this, since it centers it, the lookRotation function registers a massive jump, which can be jarring to the user. To further complicate things, that jump happens *after* the cursor is locked, which for some reason returns a zero delta for both x and y.

To get around this and fix the UI jump, I added a class variable bool 'wasLocked' and changed the LookRotation so it starts with this...

Code (CSharp):

1.         public void LookRotation(Transform character, Transform camera)
2.         {
3.             if (Cursor.visible==true) {
4.                 wasLocked = false;
5.                 return;
6.             }
7.          
8.             float yRot = CrossPlatformInputManager.GetAxis("Mouse X") * XSensitivity;
9.             float xRot = CrossPlatformInputManager.GetAxis("Mouse Y") * YSensitivity;
10.  
11.  
12.             if (wasLocked==false) {
13.                 if (xRot==0) return; // the first few times through here, a zero rotation is returned.
14.                 if (yRot==0) return; // So we just ignore it if that happens.
15.                 wasLocked = true;
16.                 return;
17.             }
18.  

... this eliminates the jarring jump, and doesn't affect gameplay otherwise. I can set the cursor elsewhere like this...

Code (CSharp):

1.         Cursor.visible = false;
2.         Cursor.lockState = CursorLockMode.Locked;
3.  

... and all is well


-Chilton