topic Re: face.CalculateFacetsAndTextureMap throw exception in Inventor Programming Forum

face.CalculateFacetsAndTextureMap throw exception

pfk — Fri, 10 May 2013 09:56:40 GMT

I have a valid Face from a SurfaceBody, and the call to face.CalculateFacetsAndTextureMap throws the following exception....

[System.Runtime.InteropServices.COMException] = {"Type mismatch. (Exception from HRESULT: 0x80020005 (DISP_E_TYPEMISMATCH))"}

The code I'm using is:

                foreach (Face face in surfaceBody.Faces)
                {
                    double tolerance = 0.1;
                    int vertexCount = 0;
                    int facetCount = 0;
                    double[] vertexCoordinates;
                    double[] normalVectors;
                    int[] vertexIndexes;
                    double[] textureCoordinates;
                    face.CalculateFacetsAndTextureMap(tolerance, out vertexCount, out facetCount, out vertexCoordinates, out normalVectors, out  vertexIndexes, out textureCoordinates);
                }

Can anyone guide to me what I am doing wrong pls?

Thanks

Re: face.CalculateFacetsAndTextureMap throw exception

adam.nagy — Tue, 14 May 2013 22:35:42 GMT

Hi,

You would need to initialize the input arrays: http://adndevblog.typepad.com/manufacturing/2013/05/type-mismatch-when-calling-calculatefacetsandtexturemap.html

Cheers,

Re: face.CalculateFacetsAndTextureMap throw exception

pfk — Fri, 14 Jun 2013 10:41:14 GMT

I confirm that this fixes the issue. Thank you so much for taking the time to add a blog entry on this. A reminder for other people implementing this function, the vertex indexes start at 1, not 0 (this is in the documentation, but easy to miss).