Vuforia only render in OpenGLES2, not Metal

Hello, I’m having an issue after integrating react-native with Vuforia. Everything runs well, but Vuforia always runs on OpenGLES2 instead of Metal. I really need to run it on Metal because in the app we also need to run the ARKit. I tried to force Graphics API on Unity by change it only to Metal but the result was the same!

Here’s the log when I am not using react-native-unity-view:

....
Initializing Vuforia...
2019-08-06 13:44:58.044546+0700 unityreact4[975:63447] User pre-granted access to the camera
2019-08-06 13:44:58.044615+0700 unityreact4[975:63447] INFO/AR(975) 2019-08-06 13:44:58: Vuforia selected rendering API Metal
2019-08-06 13:44:58.044632+0700 unityreact4[975:63447] INFO/AR(975) 2019-08-06 13:44:58: Vuforia SDK version 8.3.8
2019-08-06 13:44:58.044646+0700 unityreact4[975:63447] INFO/AR(975) 2019-08-06 13:44:58: Vuforia SDK build 3621
2019-08-06 13:44:58.097371+0700 unityreact4[975:63447] INFO/AR(975) 2019-08-06 13:44:58: Matched precache profile for Apple, iPad7,5, iOS 12, 800.1
2019-08-06 13:44:59.658717+0700 unityreact4[975:63447] INFO/AR(975) 2019-08-06 13:44:59: Vuforia Fusion: Detected and enabled use of ARKit
2019-08-06 13:44:59.660540+0700 unityreact4[975:63447] Rendering mode set to: Metal
2019-08-06 13:44:59.672348+0700 unityreact4[975:63447] Rendering mode set to: Metal
2019-08-06 13:44:59.675556+0700 unityreact4[975:63447] DEBUG/AR(975) UIView has CAMetalLayer layer class
2019-08-06 13:44:59.675786+0700 unityreact4[975:63447] DEBUG/AR(975) UIView does not respond to selector renderFrameVuforia
....

And here’s how it’s reported after I used react-native-unity-view:

....
Initializing Vuforia...
2019-08-06 14:42:47.621329+0700 unityreact4[1053:77026] User pre-granted access to the camera
2019-08-06 14:42:47.621433+0700 unityreact4[1053:77026] INFO/AR(1053) 2019-08-06 14:42:47: Vuforia selected rendering API OpenGL ES 2.x
2019-08-06 14:42:47.621476+0700 unityreact4[1053:77026] INFO/AR(1053) 2019-08-06 14:42:47: Vuforia SDK version 8.3.8
2019-08-06 14:42:47.621504+0700 unityreact4[1053:77026] INFO/AR(1053) 2019-08-06 14:42:47: Vuforia SDK build 3621
2019-08-06 14:42:47.690246+0700 unityreact4[1053:77026] INFO/AR(1053) 2019-08-06 14:42:47: Matched precache profile for Apple, iPad7,5, iOS 12, 800.1
2019-08-06 14:42:48.997315+0700 unityreact4[1053:77026] INFO/AR(1053) 2019-08-06 14:42:48: Vuforia Fusion: Detected and enabled use of ARKit
2019-08-06 14:42:48.999518+0700 unityreact4[1053:77026] Rendering mode set to: OpenGL ES 2.0
2019-08-06 14:42:49.036414+0700 unityreact4[1053:77026] Rendering mode set to: OpenGL ES 2.0
2019-08-06 14:42:49.037062+0700 unityreact4[1053:77026] DEBUG/AR(1053) UIView has CAMetalLayer layer class
2019-08-06 14:42:49.037287+0700 unityreact4[1053:77026] DEBUG/AR(1053) UIView does not respond to selector renderFrameVuforia
....

as you can see, it stated as Vuforia selected rendering API OpenGL ES 2.x. It’s really strange. Maybe Vuforia detected the react app as OpenGL ES 2? Do I have to set something on XCode to force everything to render on Metal?

Thanks

[zbagley]

@igrir Can’t believe I forgot the flag (again). That was the issue, thank you.

[igrir]

@zbagley that’s correct, but the thing @f111fei being aware of is the problem mentioned in this issue https://github.com/f111fei/react-native-unity-view/issues/29

I successfully included ARKit camera and run it using this library, but unfortunately I can’t combine it with Vuforia as it only render black screen. The funny thing is the detection runs well! The 3D object being shown on the position where the marker was, but only the camera won’t render