!IsNormalized errors when applying skew to camera worldToCameraMatrix

Hi all,

I was wondering if anyone could help me with an error that I’m seeing repeat endlessly in the Console Window when applying a skew factor to a camera's worldtoCameraMatrix.

I am currently doing this with the following code, which I've attached to my camera GameObject.

Code (csharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. [RequireComponent(typeof(Camera))]
5.  
6. public class SkewCamera : MonoBehaviour
7. {
8.     public float m_Skew = 0.5f;
9.  
10.     public void Start()
11.     {
12.         // Just an arbitrary rotation
13.         transform.eulerAngles = new Vector3(45.0f, 45.0f, 0.0f);       
14.     }
15.  
16.     public void LateUpdate()
17.     {
18.         Matrix4x4 NewWorldToCameraMatrix = transform.worldToLocalMatrix;
19.  
20.         Matrix4x4 SkewMatrix = Matrix4x4.identity;
21.         SkewMatrix[2, 0] = m_Skew;
22.  
23.         NewWorldToCameraMatrix *= SkewMatrix;
24.  
25.         camera.worldToCameraMatrix = NewWorldToCameraMatrix;   
26.     }
27. }

This causes a flood of the following error message in the Console Window:

!IsNormalized (normal, 0.001f)

With the stack:

Code (csharp):

1. !IsNormalized (normal, 0.001f)
2. UnityEditor.EditorGUIUtility:INTERNAL_CALL_RenderGameViewCameras(Rect, Rect, Boolean, Boolean)
3. UnityEditor.EditorGUIUtility:RenderGameViewCameras(Rect, Rect, Boolean, Boolean) (at C:\BuildAgent\work\14194e8ce88cdf47\Editor\MonoGenerated\Editor\EditorGUIUtility.cs:330)
4. UnityEditor.GameView:OnGUI() (at C:\BuildAgent\work\14194e8ce88cdf47\Editor\Mono\GameView\GameView.cs:521)
5. System.Reflection.MonoMethod:InternalInvoke(Object, Object[], Exception)
6. System.Reflection.MonoMethod:Invoke(Object, BindingFlags, Binder, Object[], CultureInfo)
7. System.Reflection.MethodBase:Invoke(Object, Object[])
8. UnityEditor.HostView:Invoke(String, Object) (at C:\BuildAgent\work\14194e8ce88cdf47\Editor\Mono\GUI\DockArea.cs:228)
9. UnityEditor.HostView:Invoke(String) (at C:\BuildAgent\work\14194e8ce88cdf47\Editor\Mono\GUI\DockArea.cs:221)
10. UnityEditor.DockArea:OnGUI() (at C:\BuildAgent\work\14194e8ce88cdf47\Editor\Mono\GUI\DockArea.cs:649)
11.  

This seems to be very similar to the issue reported here:

http://forum.unity3d.com/threads/131936-ERR-!IsNormalized.-Camera-matrix-change

But there does not seem to be a resolution at present.

Can anyone help me apply a camera skew factor without provoking this error? I am running Unity 3.5.6f4, by the way.

Thanks in advance!

 

Having the same problem here. You found any solution? Initially, I solved it by skewing the camera projection, but in that case I have to move the camera to actually show the skewed projection, and shadows are thus not rendered (because Unity thinks they're outside the camera view).

EDIT: also, this issue seems to appear only while playing in the Unity Editor. No errors are logged while playing a regular build