Hi Bruce, Thanks for clarifying this. Another question. When comparing lh.sphere and lh.white face lists they are exactly the same, which makes sense and only vertice's coordinates differs. Does this apply also for the face list of the flattened patch? Because I made quick check and most of the faces of the flattened patch equals for the faces of lh.white but there is still plenty of faces that do not match.. Or is this only a coincidence?
-Tuomas On 06/02/12 16:51, Bruce Fischl wrote: > Hi Tuomas > > yes, the format of the face list in the ascii file is: > > <face index> > <vertex index> <vertice index> <vertex index> > . > . > . > > where all the indices are 0-based, and the<vertex index> entries are the 3 > vertices that make up that triangular face. Note that *only* the faces and > vertices that have not been removed by cutting are in the patch file. > > cheers > Bruce > > > On Mon, 6 Feb 2012, Tuomas Tolvanen wrote: > >> Dear surfers, >> >> Using [faces verts] = freesurfer_read_surf(surface) gives me the face >> list and vertices coordinates. I assume that using different surface >> (e.g. lh.white and lh.sphere) changes only the coordinates and the face >> list remains the same (?). What about with flattened patch? I converted >> the flattened patch to ascii and read it to Matlab. This is what I got: >> >> First ten rows: >> >> '#!ascii version of patch ./lh.orig. The 1st index is not a vertex number' >> '25720 50563' >> '1 vno=0' >> '6.217312 34.772942 0.000000' >> '2 vno=1' >> '6.013689 34.451294 0.000000' >> '3 vno=2' >> '5.807863 33.961815 0.000000' >> '4 vno=3' >> '6.546745 34.426727 0.000000' >> ... >> At somepoint the rows changes to this: >> >> '0' >> '0 1 3 ' >> '1' >> '4 3 1 ' >> '2' >> '0 75 1 ' >> '3' >> '76 1 75 ' >> '4' >> '0 3 83 ' >> '5' >> >> It's obvious that every second row, starting from the 4th row, is the >> xyz-coordinates of the vertex on the flatmap. Is the latter part of the >> ascii data the face list? And if it is, are those indices referring to >> the original vertice indices? >> >> Long story short: does the ascii data (of the flat patch) consist of the >> vertice coordinates and the face list in the same way as lh.white (with >> the exception that indices are reduced by one [1=0, 2=1...])? >> >> -Tuomas >> >> >> _______________________________________________ >> Freesurfer mailing list >> Freesurfer@nmr.mgh.harvard.edu >> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >> >> >> > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > > The information in this e-mail is intended only for the person to whom it is > addressed. If you believe this e-mail was sent to you in error and the e-mail > contains patient information, please contact the Partners Compliance HelpLine > at > http://www.partners.org/complianceline . If the e-mail was sent to you in > error > but does not contain patient information, please contact the sender and > properly > dispose of the e-mail. _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
