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Trying to extract the vertex index from a freeform mesh [GLSCENE]

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Hi all, I was wondering if you could help me on this. I am trying to save a simple OBJ file with the following typical structure. v 10 10 10 v 20 20 20 v 20 20 20 ... f 0 1 2 f 2 3 4 f ... The data are derived from a freeform mesh (loaded using GLScene). I can extract the vertices coordinates using triangles:=form1.GLFreeForm1.MeshObjects[0].ExtractTriangles(); for x:= 0 to triangles.count-1 do begin a := triangles.Items[x]; writeln (gdame,'v ',a[0],' ',a[1],' ',a[2]); end; but I cannot find the faces index are stored. Any ideas onthis? Cheers

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