FreeLook Cam Issue

[BhawanVirk]

Free Look cam is not working by default. I did have assigned follow and look at target. After pressing play button, main camera does not do anything and also every time I select free look cam gameobject (btw this gameobject is prefab) I get the error I pasted at the bottom. But if you disable and re-enable free look gameobject at runtime it starts to work like normal.

Produced In Unity Version: 2021.2.11f1

Error In Editor: NullReferenceException: Object reference not set to an instance of an object Cinemachine.CinemachineFreeLookEditor.DrawFreeLookGizmos (Cinemachine.CinemachineFreeLook vcam, UnityEditor.GizmoType selectionType) (at Library/PackageCache/com.unity.cinemachine@2.8.4/Editor/Editors/CinemachineFreeLookEditor.cs:178) UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&)

[glabute]

It sounds as though your scene is corrupted with an orphan vcam with the same priority as the FreeLook. Try to find it and delete it. There are some elusive issues that crop up from time to time when editing FreeLook prefabs, but we have not been able to reproduce them. If you could give precise repro steps for how to produce this situation from a clean project, it would be most helpful.

[BhawanVirk]

It turns out the free look cam prefab was corrupted in some way, it was creating multiple vcam gameobjects in scene with named Top Rig, Middle Rig, Bottom Rig and Rig tabs on free look cam component were not showing anything but with warning to assign follow/look target while I did have had assigned them. So I fixed it by first deleting all dummy vcam gameobjects from the scene and then I opened free look cam prefab and as I clicked on the free look component gameobject it had (Top Rig, Middle Rig, Bottom Rig) as child gameobjects. Then I deleted these child gameobjects, but everytime i clicked on freelook cam gameobject it was recreating these three child gameobjects again. So I ended up deleting freelook cam component in prefab and saving the prefab as empty and reopening and assigning new freelook cam component again in prefab and then it starts to work like normal. Btw when prefab was corrupted, everytime I selected freelook cam gameobject in prefab it produced warning in editor saying VCCache != null or something.

[glabute]

The Top/Middle/Bottom Rig children of the FreeLook are supposed to be there, that's why they keep getting recreated. Normally they're hidden objects so you don't see them in your scene. When editing prefabs, however, they become visible. You should ignore them in the prefab, but if you ever see them orphaned in your scene, that's a problem. If you can find repro steps for how those orphan rigs get accidentally created, I would be grateful if you would communicate them to me.

[BhawanVirk]

I just reproduced it and I think plastic scm package is corrupting the freelook cam prefab. Here are the steps I performed (Its weird that they sometimes work and sometimes not)

• Make sure you have plastic scm window opened by going to Window -> Plastic SCM
• First checkout freelook cam prefab by either making changes to it or just pressing checkout button on top right corner in inspector.
• Then press play button and select freelook cam gameobject in scene hierarchy
• Then press play button again to stop the simulation and quickly select freelook prefab and you'll see 3 rig orphans in scene hierarchy
• You can also now select the freelook prefab and press play button and you'll see 3 more rig orphans in scene hierarchy but they will go away when you stop the simulation.
• Once you've successfully produced this bug you'll also see bunch of no reference errors in console and also the rig tabs on freelook gameobject in hierarchy will show no settings under them.

[BhawanVirk]

Also if you couldn't produce this bug in first time, try closing and opening project

[BhawanVirk]

And also after this bug when you select prefab again you'll get 3 errors like this (One for each rig):

Setting the parent of a transform which resides in a Prefab Asset is disabled to prevent data corruption (GameObject: 'TopRig'). UnityEditor.Undo:SetTransformParent (UnityEngine.Transform,UnityEngine.Transform,string) Cinemachine.CinemachineFreeLookEditor/CreateRigWithUndo/<>c:<.cctor>b__0_0 (Cinemachine.CinemachineFreeLook,string,Cinemachine.CinemachineVirtualCamera) (at Library/PackageCache/com.unity.cinemachine@2.8.4/Editor/Editors/CinemachineFreeLookEditor.cs:141) Cinemachine.CinemachineFreeLook:CreateRigs (Cinemachine.CinemachineVirtualCamera[]) (at Library/PackageCache/com.unity.cinemachine@2.8.4/Runtime/Behaviours/CinemachineFreeLook.cs:559) Cinemachine.CinemachineFreeLook:UpdateRigCache () (at Library/PackageCache/com.unity.cinemachine@2.8.4/Runtime/Behaviours/CinemachineFreeLook.cs:625) Cinemachine.CinemachineFreeLook:GetRig (int) (at Library/PackageCache/com.unity.cinemachine@2.8.4/Runtime/Behaviours/CinemachineFreeLook.cs:173) Cinemachine.CinemachineFreeLookEditor:UpdateRigEditor () (at Library/PackageCache/com.unity.cinemachine@2.8.4/Editor/Editors/CinemachineFreeLookEditor.cs:109) Cinemachine.CinemachineFreeLookEditor:OnInspectorGUI () (at Library/PackageCache/com.unity.cinemachine@2.8.4/Editor/Editors/CinemachineFreeLookEditor.cs:81) UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)

[glabute]

The CM3 refactor of freelook takes care of this issue