Yeah, I got that. However, to my knowledgde, with that arrangement of vertices and TRIANGLEFAN... well...
Youd divide the image in the triangles with the following points:
[0,1,2] (all on one line, therefore invisible)
[0,2,3] (all on one line, therefore invisible)
[0,3,4] (all on one line, therefore invisible)
...
...
[0,15,16] (makes up half the image)
[0,16,17] (from here on it works as intended)
Therefore half the image will not work out as intended
Or am I wrong here..? :/
Edit: Damn I should go to sleep now, what with all the typing errors I miss. I want to know if it works out somehow before, though.