Flip and/or Mirror Camera not working as expected

Hi Dudes,

I'm kind of stuck with this one. I used this example https://docs.unity3d.com/ScriptReference/MonoBehaviour.OnPreCull.html to invert one of multiple cameras in my scene As long as [bool] flip and [bool] mirror are equal, my camera is inverted as expected. But as soon as they differ, I get both, original & mirrored image. May anyone help me on this???

Code (CSharp):

1. public class FlipAndMirror : MonoBehaviour
2.     {
3.     public Camera main_camera;
4.  
5.     public void FlipAndMirrorMainCamera(bool flip, bool mirror)
6.         {
7.        
8.         main_camera.ResetWorldToCameraMatrix();
9.         main_camera.ResetProjectionMatrix();
10.        
11.         if (flip&&mirror)
12.             {
13.             main_camera.projectionMatrix = main_camera.projectionMatrix * Matrix4x4.Scale(new Vector3(-1, -1, 1));
14.             }  
15.            
16.         if (!flip&&mirror)  
17.             {
18.             main_camera.projectionMatrix = main_camera.projectionMatrix * Matrix4x4.Scale(new Vector3(-1, 1, 1));
19.             DebugThis("here I am"+ main_camera.projectionMatrix);
20.            
21.             }              
22.         if (flip&&!mirror)  
23.             {
24.             main_camera.projectionMatrix = main_camera.projectionMatrix * Matrix4x4.Scale(new Vector3(1, -1, 1));
25.             }  
26.            
27.         if (!flip&&!mirror)      
28.             {
29.             main_camera.projectionMatrix = main_camera.projectionMatrix * Matrix4x4.Scale(new Vector3(1, 1, 1));          
30.             }  
31.         }
32.     }

 

I don't understand what you mean by "get both original & mirrored".

 

thx for your response,

for example: First i call FlipandMirrorMainCamera(true,true), my camera is inverted on both axis and
i see the objects in the scene inverted as well. Now i call FlipandMirrorMainCamera(false,true) and i see my objects inverted, as well as not inverted. The camera shows 2 Objects.

 

If you're seeing two images of the same object at the same time, that seems unlikely to be the fault of the code you posted. I don't think you can get that result just by messing with the projection matrix, and certainly not with a scale.

Is it possible that you have two cameras whose images are compositing?

 

Setting Clear Flags from Skybox to Solid Color fixed it. But i am still kind of confused.