Issue with device rotation commands

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Mobiius

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Posted: 12th Jan 2016 15:31 Edited at: 12th Jan 2016 16:49

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Hello. I'm having issues with my VR game again.

The below code works fine on my Samsung Galaxy S3 mini (Android 4.1.2), but when I run it on my Nexus 5 (Android 6.0.1 CyanogenMod 13.0.20160102), the rotation commands all return 0.
Does anyone else have this issue or is it just me? (I know the rotation sensors work, as I can play Google Cardboard apps from the app store just fine.)

+ Code Snippet

SetOrientationAllowed( 0, 0, 1, 1 )

Repeat
	Print( "Device Name: " + GetDeviceBaseName() )
	Print( "Device Type: " + GetDeviceType() )
	
	If GetRotationVectorSensorExists() = 0
	   Print( "Could not detect a rotation sensor." )
	Else
	   Print( "W2: " + Str( GetRawRotationVectorW2() ) )
	   Print( "X2: " + Str( GetRawRotationVectorX2() ) )
	   Print( "Y2: " + Str( GetRawRotationVectorY2() ) )
	   Print( "Z2: " + Str( GetRawRotationVectorZ2() ) )
	EndIf

	Sync()
Until GetRawKeyReleased( 27 )

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Paul Johnston

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Posted: 12th Jan 2016 17:34 Edited at: 12th Jan 2016 17:34

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I have a Nexus 5 running Android 6.0.1 stock, and the above code works for me. Does GetRotationVectorSensorExists return 0 as well? I'm not sure what could be happening there.

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Mobiius

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Posted: 12th Jan 2016 22:30

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On my phone, GetRotationVectorSensorExists () returns 1.
The various GetRawRotationVector_2 commands all return 0.0

Works on my S3, not on my nexus5, but it works fine on my wifes nexus 5... She isn't running CyanogenMod however.

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Paul Johnston

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Posted: 13th Jan 2016 02:33

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Strange, do the other sensors work, gyro, accelerometer, magnetic?

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Mobiius

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Posted: 13th Jan 2016 09:13

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I've not tried them. It's weird as other VR apps work fine.

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Paul Johnston

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Posted: 13th Jan 2016 17:11

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It might be that they are using Java instead of the NDK

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Mobiius

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Posted: 13th Jan 2016 18:49

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Then what could the issue be? It it my phone? CyanogenMod? AppGameKit? NDK?
There does seem to be an issue somewhere and it would be good to get to the bottom of it so that I know the feature will work across all devices.

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CJB

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Posted: 14th Jan 2016 08:59

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My guess would be the Cyanogen firmware is at fault. Looks like they patched some sensor issues in December (from XDA forums), but if you're using a non-semi-official version then you might not have those updates in your build.

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Mobiius

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Posted: 14th Jan 2016 10:07

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I appear to be using a nightly build which was on the phone when I got it. I might remove CM and put stock android back on.

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Paul Johnston

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Posted: 14th Jan 2016 17:47

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If you wanted to debug the issue my first step would be to determine whether the other sensor commands work, accelerometer, gyro, and magnetic. If they don't work then it suggests a deeper issue with the interface between NDK and the CyanogenMod sensor manager. If they do work then it suggests a lack of support for the rotation vector sensor, which is a fusion of all the other sensors and is not specifically defined in the NDK sensor header files. We use a hard coded value that gets passed to the Android OS and hope that it responds correctly. The next step would be to start experimenting and researching a way of getting CynogenMod to respond to the NDK sensor commands in general, or the rotation vector in particular, depending on what was discovered. Unfortunately that's not an easy task and isn't guaranteed to find a solution.

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Mobiius

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Posted: 14th Jan 2016 19:28

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SetWindowTitle( "Sensor Test" )
SetWindowSize( GetDeviceWidth(), GetDeviceHeight(), 1 )

// set display properties
SetVirtualResolution( GetDeviceWidth(), GetDeviceHeight() )
SetOrientationAllowed( 1, 1, 0, 0 )

Repeat
    Print( "     AccelX: " + Str( GetRawAccelX() ) )
    Print( "     AccelY: " + Str( GetRawAccelY() ) )
    Print( "     AccelZ: " + Str( GetRawAccelZ() ) )
    Print( "    GPS Alt: " + Str( GetRawGPSAltitude() ) )
    Print( "    GPS Lat: " + Str( GetRawGPSLatitude() ) )
    Print( "   GPS Long: " + Str( GetRawGPSLongitude() ) )
    Print( " Gyro Vel X: " + Str( GetRawGyroVelocityX() ) )
    Print( " Gyro Vel Y: " + Str( GetRawGyroVelocityY() ) )
    Print( " Gyro Vel Z: " + Str( GetRawGyroVelocityZ() ) )
    Print( "Light Level: " + Str( GetRawLightLevel() ) )
    Print( "      Mag X: " + Str( GetRawMagneticX() ) )
    Print( "      Mag Y: " + Str( GetRawMagneticY() ) )
    Print( "      Mag Z: " + Str( GetRawMagneticZ() ) )
    Print( "  Proximity: " + Str( GetRawProximityDistance() ) )
    Print( "      Rot W: " + Str( GetRawRotationVectorW() ) )
    Print( "     Rot W2: " + Str( GetRawRotationVectorW2() ) )
    Print( "      Rot X: " + Str( GetRawRotationVectorX() ) )
    Print( "     Rot X2: " + Str( GetRawRotationVectorX2() ) )
    Print( "      Rot Y: " + Str( GetRawRotationVectorY() ) )
    Print( "     Rot Y2: " + Str( GetRawRotationVectorY2() ) )
    Print( "      Rot Z: " + Str( GetRawRotationVectorZ() ) )
    Print( "     Rot Z2: " + Str( GetRawRotationVectorZ2() ) )
    Print( "        FPS: " + Str( ScreenFPS(), 2 ) )
    Sync()
Until GetRawKeyReleased( 27 )

+ Code Snippet

SetWindowTitle( "Sensor Test" )
SetWindowSize( GetDeviceWidth(), GetDeviceHeight(), 1 )

// set display properties
SetVirtualResolution( GetDeviceWidth(), GetDeviceHeight() )
SetOrientationAllowed( 1, 1, 0, 0 )

Repeat
    Print( "     AccelX: " + Str( GetRawAccelX() ) )
    Print( "     AccelY: " + Str( GetRawAccelY() ) )
    Print( "     AccelZ: " + Str( GetRawAccelZ() ) )
    Print( "    GPS Alt: " + Str( GetRawGPSAltitude() ) )
    Print( "    GPS Lat: " + Str( GetRawGPSLatitude() ) )
    Print( "   GPS Long: " + Str( GetRawGPSLongitude() ) )
    Print( " Gyro Vel X: " + Str( GetRawGyroVelocityX() ) )
    Print( " Gyro Vel Y: " + Str( GetRawGyroVelocityY() ) )
    Print( " Gyro Vel Z: " + Str( GetRawGyroVelocityZ() ) )
    Print( "Light Level: " + Str( GetRawLightLevel() ) )
    Print( "      Mag X: " + Str( GetRawMagneticX() ) )
    Print( "      Mag Y: " + Str( GetRawMagneticY() ) )
    Print( "      Mag Z: " + Str( GetRawMagneticZ() ) )
    Print( "  Proximity: " + Str( GetRawProximityDistance() ) )
    Print( "      Rot W: " + Str( GetRawRotationVectorW() ) )
    Print( "     Rot W2: " + Str( GetRawRotationVectorW2() ) )
    Print( "      Rot X: " + Str( GetRawRotationVectorX() ) )
    Print( "     Rot X2: " + Str( GetRawRotationVectorX2() ) )
    Print( "      Rot Y: " + Str( GetRawRotationVectorY() ) )
    Print( "     Rot Y2: " + Str( GetRawRotationVectorY2() ) )
    Print( "      Rot Z: " + Str( GetRawRotationVectorZ() ) )
    Print( "     Rot Z2: " + Str( GetRawRotationVectorZ2() ) )
    Print( "        FPS: " + Str( ScreenFPS(), 2 ) )
    Sync()
Until GetRawKeyReleased( 27 )

Using the above code, the following sensors return values: ( No Values = 0.000000, Negative No Values = -0.000000 )

GetRawAccelX: Values
GetRawAccelY: Values
GetRawAccelZ: Values
GetRawGPSAltitude: No Values
GetRawGPSLatitude: No Values
GetRawGPSLongitude: No Values
GetRawGyroVelocityX: Values
GetRawGyroVelocityY: Values
GetRawGyroVelocityZ: Values
GetRawLightLevel: Values
GetRawMagneticX: No Values
GetRawMagneticY: No Values
GetRawMagneticZ: No Values
GetRawProximityDistance: Always shows 5
GetRawRotationVectorW: No Values
GetRawRotationVectorW2:No Values
GetRawRotationVectorX: Negative No Values
GetRawRotationVectorX2: No Values
GetRawRotationVectorY: Negative No Values
GetRawRotationVectorY2: Negative No Values
GetRawRotationVectorZ: No Values
GetRawRotationVectorZ2: No Values

I think I'll just put stock Android on it and save the hassle, but at least we know that this version of CM doesn't work with most of the sensor commands.

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Mobiius

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Posted: 16th Jan 2016 14:38

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Stock android works fine on my phone, so it was definitely CyanogenMod that was causing the issue, at least on this device it was.

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