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Trilib on Hololens 2 - Unable to load DLL 'assimp'

Discussion in 'VR' started by Rufus31415, Mar 30, 2020.

  1. Rufus31415

    Rufus31415

    Joined:
    Mar 16, 2020
    Posts:
    10
    Hello,
    I'm having trouble using Trilib on the Hololens 2 (ARM64).
    At runtime, I get the Exception : "Unable to load DLL 'assimp': The specified module could not be found."

    The project is built with Unity using il2cpp, ARM64 configuration.
    Then the C++ project is compiled with Visual Studio in ARM64 again.

    The problem appears during pinvoke, and the native winrt function LoadPackagedLibrary returns null.
    The DLLs assimp.dll and stb_image.dll are next to the main executable.

    Are you sure the DLL assets/trilib/plugins/uwp/arm64/*.dll are compiled for ARM64 ? Do they need additional dependencies ?
     
  2. Rufus31415

    Rufus31415

    Joined:
    Mar 16, 2020
    Posts:
    10
    After executing the command "dumpbin /headers assimp.dll", it turns out that the DLL is ARM 32 bit. Would it be possible to have a 64-bit compilation?
     
  3. timke

    timke

    Unity Technologies

    Joined:
    Nov 30, 2017
    Posts:
    257
    As I understand it, the assimp library is an open-source project on GitHub: https://github.com/assimp/assimp, and so you should be able clone the repo and build ARM64 yourself.
     
  4. Rufus31415

    Rufus31415

    Joined:
    Mar 16, 2020
    Posts:
    10
    I know and that's what I'll do if the author doesn't bring a fix.
     
  5. JustUsernameOhMyGod

    JustUsernameOhMyGod

    Joined:
    Dec 27, 2017
    Posts:
    1
    Hello,
    have you successfully run Trilib on Hololens2?
    I also encountered this problem, I don't know how to solve it
     
  6. d-bugger

    d-bugger

    Joined:
    Jan 22, 2017
    Posts:
    4
    Same here. Did you make any progress. I always get the error with the stb_image.dll for UWP arm64
     
  7. ccarrieta

    ccarrieta

    Joined:
    Dec 2, 2017
    Posts:
    3
    I am also trying to use TriLib... anyone can help me ? I am trying to use it to load a model at runtime even if its through holographic remoting and be able to apply prefabs to the loaded model automatically to be able to manipulate the model
     
  8. Rufus31415

    Rufus31415

    Joined:
    Mar 16, 2020
    Posts:
    10
    Hi,
    You can download a beta version of Trilib2 which is ARM64 compatible here : https://ricardoreis.net/?p=217
    However, I am not satisfied with Trilib 2 which supports less format and is currently unstable. I am still looking for a library. I plan to take the time to compile ASSIMP myself with emscripten and cmake UWP. I have an application that runs on both Hololens 2 and WebGL.
     
  9. KysS_k

    KysS_k

    Joined:
    May 8, 2020
    Posts:
    1
    Can trilib2 load the fbx model normally? Be able to share the latest version of trilib and have no plans to buy it before verifying its feasibility
     
  10. HexinUnity1

    HexinUnity1

    Joined:
    Aug 27, 2019
    Posts:
    5
    How did you solve this problem? Is version 2.0 OK
     
  11. Bocci

    Bocci

    Joined:
    Sep 7, 2013
    Posts:
    15
    I downloaded the new version but I still get the exact same error (DllNotFoundException: Unable to load DLL 'assimp': The specified module could not be found) Did it work for you with the new version of Trilib?
     
  12. wechat_os_Qy00NKgJlILexWATnqzKSr5VE

    wechat_os_Qy00NKgJlILexWATnqzKSr5VE

    Joined:
    Sep 27, 2020
    Posts:
    1
    Hi!
    I have met the same trouble that you mentioned of using the Trilibs on HoloLens2.
    Did you solved this problem?
     
  13. Rufus31415

    Rufus31415

    Joined:
    Mar 16, 2020
    Posts:
    10
    Check ARM for this dll and just compile for ARM (not ARM64)
     
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