Hi all,
I am using tetgen to construct a tetrahedral mesh with the extracted pial surface in subject 004 from the tutorial datasets. But I got an error message from tetgen to say that some triangles are intersecting each other. I am not sure whether anyone has found this before. The file I tested was 004/lh.pial. I first transferred it to asc format with mris_convert, and then make a straightforward transfer to .off (used by tetgen and geomview). I loaded the .off file with geomview and it looks right. Then I run tetgen with the .off file and got an error message like below, which means that there are intersections among the facets. Error: Invalid PLC. Two subfaces (219028, 5283, 5282) and (219054, 5300, 5283) are found intersecting each other. Hint: Use -d switch to find all intersecting facets.
This is a little strange to me since the topology issue has been handled in the reconstructed surface, does any one have any clue?
Thank you very much!
Yasheng