Multiple displays in Unity

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Malcolm Ryan

• October 10, 2018 05:01
• Edited

I'm trying to make a game in Unity with a UI display on the monitor and a separate world shown in the FOVE headset. Is this possible?

I have tried the following:

1. Firstly, I have the VR part working fine on its own. It runs how I expected.
2. Following the instructions in the Unity docs, I checked Display.displays.Length to make sure there were multiple displays. Under the standard configuration of the FOVE only one display appears.
3. I found that if I put the FOVE into extended mode, I could get Unity to recognise and activate it as a second display.
4. However when I do this, the Compositor seems to have issues. In the FOVE Debug Tool, the button "Start/Stop Compositor" keeps switching automatically between Start and Stop.
5. If I click the button, the Compositor appears in the Windows toolbar and the FOVE shows the usual space background.
6. In Unity I set configured the Camera on the FoveInterface with Target Display = Display 2 and a separate UI Camera with Target Display = Display 1. I set the Culling Masks on these cameras so the UI only appears in the UI Camera.

This much seems to work, however the VR scene runs very slowly and is distorted (it does not seem to be correctly accounting for lens distortion). Neither of these is a problem in the one-camera solution.

Is there a way to make this work correctly?

In case its relevant, I am running FOVE Runtime 0.15.0 and using Unity 2018.2.10. The firmware on the FOVE is up to date.

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• 

  Malcolm Ryan

  • October 10, 2018 05:07

  During Step 4, the FOVE Log is repeatedly showing:

  Trying to connect to service, pid: 10668
  Launched FoveCompositorApplication.exe
  Starting app: FoveCompositorApplication.exe
  New log client 0.15.0 C:/Program Files\FOVE\bin\FoveCompositorApplication.exe
  Setting timer interval to: 1
  Loaded config file at C:\ProgramData\FOVE\FoveVR.config
  COMPOSITOR_DISPLAY_MODE: 1
  Unable to load amdlvr64.dll: 126 The specified module could not be found.
  Created window "FOVE Compositor": -8 -31 2568 1448
  Window FOVE Compositor received quit message
  [RNDR] Forcibly acquiring rendering backend (2, 3)...
  Found 1 displays for vendorID: 63001
  Display 2147881090
  Found 0 displays for vendorID: 63001
  Found 0 displays for vendorID: 25170
  Found 0 displays for vendorID: 25170
  AMD module not found
  Searching extended displays
  Searching GPU ID0
  Found display MONITOR\GSM588F\{4d36e96e-e325-11ce-bfc1-08002be10318}\0004
  Searching GPU ID1
  Found display MONITOR\FOV0001\{4d36e96e-e325-11ce-bfc1-08002be10318}\0000
  Display match: FOVE HMD
  Attempting to create window on extended display
  Extended display found
  Called Stop Compositor
  Clearing timer interval
  Fatal error: SetFullscreenState: HResult(-2005270494)
  InitiateConnection: Service refused connection
  Loaded config file at C:\ProgramData\FOVE\FoveVR.config
  COMPOSITOR_DISPLAY_MODE: 1
  Launched FoveCompositorApplication.exe
  Starting app: FoveCompositorApplication.exe
  New log client 0.15.0 C:/Program Files\FOVE\bin\FoveCompositorApplication.exe
  Setting timer interval to: 1
  Loaded config file at C:\ProgramData\FOVE\FoveVR.config
  COMPOSITOR_DISPLAY_MODE: 1
  Unable to load amdlvr64.dll: 126 The specified module could not be found.
  Created window "FOVE Compositor": -8 -31 2568 1448
  Window FOVE Compositor received quit message
  [RNDR] Forcibly acquiring rendering backend (2, 3)...
  Found 1 displays for vendorID: 63001
  Display 2147881090
  Found 0 displays for vendorID: 63001
  Found 0 displays for vendorID: 25170
  Found 0 displays for vendorID: 25170
  AMD module not found
  Searching extended displays
  Searching GPU ID0
  Found display MONITOR\GSM588F\{4d36e96e-e325-11ce-bfc1-08002be10318}\0004
  Searching GPU ID1
  Found display MONITOR\FOV0001\{4d36e96e-e325-11ce-bfc1-08002be10318}\0000
  Display match: FOVE HMD
  Attempting to create window on extended display
  Extended display found
  Called Stop Compositor
  Clearing timer interval
  Fatal error: SetFullscreenState: HResult(-2005270494)
  Trying to connect to service, pid: 12784
  InitiateConnection: SendRequest(0) failed: RemoteRequester(Compositor) 1000ms timeout
  Loaded config file at C:\ProgramData\FOVE\FoveVR.config

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  Malcolm Ryan

  • October 10, 2018 05:42

  When I start the Compositor manually in Step 5, the log keeps repeating the warning:

  Inaccurate vsync times observed: Short: 0 Long: 62 Shortest: 12008us Longest: 13048us Avg: 12898us Exp: 12000us

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