Need help using external dll - Want to import whole class

Unity Engine
1

Hello guys,

so I made a script using Visual Studio that I want to use in my project. My project should be able to take two audio signals and convolute them against each other.

What have I done so far?

  • can use the files
  • extracted float[ ] from mono audio tracks
  • convolution algorithm manually typed, works (but takes ages)

Since my algorithm takes ages I wanted to get a faster one from the internet. Found one at CenterSpace. Downloaded their packages and wanted to use them. Then I used Assembly References in the project in Visual Studio to reference the NMath.dll to my project. In Visual Studio everything is fine. In Unity it says: “are you missing assembly reference?”

Since I googled two whole days to resolve this issue and tried out the world, I finally stranded here.

Usefull information: the NMath.dll is compiled against NET Framework 4.0. Unity says that the editor uses only 3.5. In the dll import settings I turned off using the dll for the editor (exclude editor). Still this doesn’t seem to solve my problem.

I also came across importing the DLL via dllImport[ ]… but I seem to be doing it wrong.
Is there a way, maybe even other than “using CenterSpace.NMath.Core;” in my code, that I can get this running?

using CenterSpace.NMath.Core;
using System.Linq;
using UnityEngine;

public class LastTry : MonoBehaviour
{
...
void Convolute(float[] audio, float[] impRsp)
    {
...
var convolution = new Float1DConvolution(impRsp, impRsp.Length);
FloatVector result = convolution.Convolve(audio);
...
}
...
}

I need the type “FloatVector” and the methods of “Float1DConvolution”, which is a class in the NMath.dll

Thanks for any help.

2

If the NMath.dll targets .net 4.0, then you’ll have to use Unity 2017 and have it target .net 4.6. Edit->Project Settings->Player-> Other Settings, look for “Scripting Runtime Version”

1 Like
3

Thanks for the quick reply, gonna try that one out!

4

@kru this did not resolve my issue. The “problem” still exists.

5

Threat can be closed. Issue not solved but the programming project is closed.

6

Don’t add a reference via “Add Reference” in Visual Studio. Unity constantly re-creates the project file whenever there are changes. Instead, create a folder in your project and drop the DLL into that folder. Unity will reference it automatically.

7

Tried it, Dustin, but it did not work. Unity doesn’t creat any reference to the DLL, neither when I drop it into the Assets folder, not when I create a new one.

8

You also have to solve this problem. Either using Unity 2017 with the framework version set to 4.6, or you have to get a .NET 3.5 version of the DLL. Also, if you turn the DLL off for the editor it’s not going to work.