Unity UWP Universal Windows Platform Build not supported?

[seanovak]

Hi All,

I'm having issue with getting the sample projects to build for UWP on Unity. Everything works as expected while playing in the editor, but when I build, I get ~190 errors, a list of assembly reference missing errors. Starting with:

Assets\LeapMotion\Core\Scripts\Utils\LeapUnityExtensions.cs(12,7): error CS0246: The type or namespace name 'LeapInternal' could not be found (are you missing a using directive or an assembly reference?)

..... and continues with additional missing references for "Hand", "Finger", "Frame", "LeapTransform",.... etc etc.

This is a clean project, with Leap Motion assets package imported in > Select UWP as target > Build > no go.

[AlexColgan]

Our Orion SDK runs on Windows, but we have not released an SDK specifically for UWP.

[DanielLWallace]

Hi Alex.

Do you guys plan on releasing an SDK for UWP anytime soon? I'm prototyping hand solutions for a VR experience on WMR (Samsung Odyssey) and I'm wondering if I should drop LM from my list of potential solutions.

Thanks!
Dan

[Merglasch]

This would interest me too. I'd love to develop for the Hololens using the leapmotion, but there seem to be a lot of hurdles

[v-ercart]

While I wait for UWP support, I got around these build errors by wrapping all my Leap specific code in if defs:

#if LEAP_MOTION_ENABLED
     // Leap Code
#endif

You can set the Global Symbols in Player Settings to turn it all on and off at once. Then when you do a UWP build, just rename the LeapMotion sdk folder to LeapMotion~ (or .LeapMotion) so it's ignored by Unity.

This allows you to keep building UWP apps without Leap support, but enables you to continue developing in the editor (or shipping your app with Leap support on other platforms).

If you want to automate it more, you can rename the LeapMotion folder in C#, then do an AssetDatabase.Refresh() to reload assets without the Leap data. Then BuildPipeline.BuildPlayer() can be used to build from C#. Then, in C#, put everything back to the way it was before.

There might be a way to use PlayerSettings.SetScriptingDefineSymbolsForGroup to automatically turn off the global script define from C#, but I never figured it out.