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.
