Freesurfer devs, I have a baffling problem in mris_sphere.
I have generated some surfaces using an external tool that uses VTK. After converting the surfaces into freesurfer format using a basic format converter, then adding volume geometry to the surface file using the image used to create it the surface appears dark in freeview. When I do mris_inflate followed by mris_sphere, mris_sphere says nearly all the triangles have negative area at the end and it never finishes. I verified in MATLAB that the surface normals (computed by mris_convert) of the original white surfaces point outwards. The darkness in freeview is not fixed by changing the order of the indices of the faces (which should invert the normal). I'm at a loss to explain this. Thanks in advance, Chris. Dr Chris Adamson Senior Research Officer Developmental Imaging, Clinical Sciences Murdoch Childrens Research Institute The Royal Children's Hospital Flemington Road, Parkville, VIC 3052 Australia E chris.adam...@mcri.edu.au<mailto:chris.adam...@mcri.edu.au> www.mcri.edu.au<http://www.mcri.edu.au/> This e-mail and any attachments to it (the "Communication") are, unless otherwise stated, confidential, may contain copyright material and is for the use only of the intended recipient. If you receive the Communication in error, please notify the sender immediately by return e-mail, delete the Communication and the return e-mail, and do not read, copy, retransmit or otherwise deal with it. Any views expressed in the Communication are those of the individual sender only, unless expressly stated to be those of Murdoch Childrens Research Institute (MCRI) ABN 21 006 566 972 or any of its related entities. MCRI does not accept liability in connection with the integrity of or errors in the Communication, computer virus, data corruption, interference or delay arising from or in respect of the Communication. P Please consider the environment before printing this email
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