How to pass Array from c++ plugin to c#?

Unity Engine
1

How to pass Array from c++ plugin to c#? I have tried different methods, still can’t work out. Does any one give some help?
[DllImport (“ASimplePlugin”)]
private static extern bool Get(ref Vector4[ ] ptrResultVerts, ref int resultVertLength);

Vector4 MarshalMethod (){

//IntPtr ptrResultVerts = IntPtr.Zero;

Vector4[ ] ptrTresultVerts = new Vector4 (0,0,0,0);

int resultVertLength = 0;

bool success = Get(ref ptrResultVerts, ref resultVertLength);

Vector4[ ] resultVertices = null;

if (success)
{
// Load the results into a managed array.
resultVertices = new Vector4[resultVertLength];

Marshal.Copy(ptrResultVerts
, resultVertices
, 0
, resultVertLength);
}

return resultVertices[0];

}

Even I change Vector4 to float numbers, still not works.

2

People usually uses strings to pass complex data. For example you can use miniJSON to parse your data.

Remember you have to use extern C to write plugins…
If you use simple data, transform it to char * , send it as char *, and get it as string.
If you use parameters to otuput data (ref, out, pointers etc…), you can use on the c++ side char *, and StringBuilder on the c# side, it works for me.

When you have you string on the c# code, you can use String.split and Int.Parse, float.Plarse to transform your string to arrays, or others…

Regards

3

That’s very helpful. I ll try that. Thank:smile:s kjuanlu.