Hi Bruce, Actually I did my comparison just like that, but I just double checked the face lists and they match. Thanks!
-Tuomas On 09/02/12 16:38, Bruce Fischl wrote: > Hi Tuomas > > the patch face list will be a subset of the full one. Note that because > faces can be excluded from the patch you can't just compare say the 5th > faces in each - you have to look up the index (given in the patch file) and > use that to find the corresponding face in the full surface file. > > cheers > Bruce > > > On Thu, 9 Feb 2012, Tuomas Tolvanen wrote: > >> 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 _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
