Hmm class functions are a little bit different than regular ones ... cause normally you would enclose the code in export "C" which makes sure it will work.
If you use objects thought, you might want to use extern types and declare the whole objects there to prevent this kind of error (unless the lib you import already offers plain function access but I do not assume so as we are talking of TV3D most likely)
If you use objects thought, you might want to use extern types and declare the whole objects there to prevent this kind of error (unless the lib you import already offers plain function access but I do not assume so as we are talking of TV3D most likely)