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# vertices_connectivity

## (Toolbox/vertices_connectivity.m in BrainStorm 2.0 (Alpha))

### Function Synopsis

    VertConn = vertices_connectivity(FV,VERBOSE);

### Help Text

    VERTICES_CONNECTIVITY - Generate the connections between vertices
     function VertConn = vertices_connectivity(FV,VERBOSE);
     function VertConn = vertices_connectivity(FV);
     FV is the standard matlab structure for faces and vertices,
      where FV.faces is m x 3, and FV.vertices is n x 3.

     VertConn returned is vector of cells, one-to-one with each row of FV.vertices.
     VertConn{i} returns a row vector of the vertex numbers (rows in FV.vertices) that
      are connected by faces to the ith vertex row in FV.vertices.

     Thus if we want to 'swell' the region around a vertex, VertConn{i} gives us the
      vertex numbers of those vertices that are adjacent.

     See also FACES_CONNECTIVITY

### Cross-Reference Information

This function is called by

    bst_imaging_display                C:\BrainStorm_2001\Toolbox\bst_imaging_display.m
    manage_corticalscouts              C:\BrainStorm_2001\Toolbox\manage_corticalscouts.m
    mritool_cb                         C:\BrainStorm_2001\Toolbox\mritool_cb.m
    zscore_gui                         C:\BrainStorm_2001\Toolbox\zscore_gui.m

### Listing of function C:\BrainStorm_2001\Toolbox\vertices_connectivity.m

    function VertConn = vertices_connectivity(FV,VERBOSE);
    %VERTICES_CONNECTIVITY - Generate the connections between vertices
    % function VertConn = vertices_connectivity(FV,VERBOSE);
    % function VertConn = vertices_connectivity(FV);
    % FV is the standard matlab structure for faces and vertices,
    %  where FV.faces is m x 3, and FV.vertices is n x 3.
    %
    % VertConn returned is vector of cells, one-to-one with each row of FV.vertices.
    % VertConn{i} returns a row vector of the vertex numbers (rows in FV.vertices) that
    %  are connected by faces to the ith vertex row in FV.vertices.
    %
    % Thus if we want to 'swell' the region around a vertex, VertConn{i} gives us the
    %  vertex numbers of those vertices that are adjacent.
    %
    % See also FACES_CONNECTIVITY

    %<autobegin> ---------------------- 26-May-2004 11:34:41 -----------------------
    % --------- Automatically Generated Comments Block Using AUTO_COMMENTS ---------
    %
    % CATEGORY: Visualization
    %
    % At Check-in: $Author: Mosher $  $Revision: 14 $  $Date: 5/26/04 10:02a $
    %
    % This software is part of BrainStorm Toolbox Version 2.0 (Alpha) 24-May-2004
    %
    % Principal Investigators and Developers:
    % ** Richard M. Leahy, PhD, Signal & Image Processing Institute,
    %    University of Southern California, Los Angeles, CA
    % ** John C. Mosher, PhD, Biophysics Group,
    %    Los Alamos National Laboratory, Los Alamos, NM
    % ** Sylvain Baillet, PhD, Cognitive Neuroscience & Brain Imaging Laboratory,
    %    CNRS, Hopital de la Salpetriere, Paris, France
    %
    % See BrainStorm website at http://neuroimage.usc.edu for further information.
    %
    % Copyright (c) 2004 BrainStorm by the University of Southern California
    % This software distributed  under the terms of the GNU General Public License
    % as published by the Free Software Foundation. Further details on the GPL
    % license can be found at http://www.gnu.org/copyleft/gpl.html .
    %
    % FOR RESEARCH PURPOSES ONLY. THE SOFTWARE IS PROVIDED "AS IS," AND THE
    % UNIVERSITY OF SOUTHERN CALIFORNIA AND ITS COLLABORATORS DO NOT MAKE ANY
    % WARRANTY, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF
    % MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, NOR DO THEY ASSUME ANY
    % LIABILITY OR RESPONSIBILITY FOR THE USE OF THIS SOFTWARE.
    %<autoend> ------------------------ 26-May-2004 11:34:41 -----------------------

    % ----------------------------- Script History ---------------------------------
    % 1994 by John C. Mosher, Ph.D.
    % 19-Nov-1999 Based on May 1998 scripts.
    % 19-May-2004 JCM Comments Cleaning
    % ----------------------------- Script History ---------------------------------

    if(~exist('VERBOSE','var')),
       VERBOSE = 1; % default non-silent running of waitbars
    end

    nv = size(FV.vertices,1);
    [nf,ns] = size(FV.faces); % number of faces, number of sides per face

    VertConn = cell(nv,1); % one empty cell per vertex

    if(VERBOSE)
       % disp(sprintf('Processing %.0f faces',nf))
       hwait = waitbar(0,sprintf('Processing the Vertex Connectivity for %.0f faces',nf));
       drawnow %flush the display
    end

    for iv = 1:nf, % use each face's information
       if(VERBOSE)
          if(~rem(iv,max(round(nf/10),1))), % ten updates
             % fprintf(' %.0f',iv);d
             waitbar(iv/nf,hwait);
             drawnow %flush the display
          end
       end
       for i = 1:ns, %each vertex of the face
          for j = 0:(ns-2), % each additional vertex
             VertConn{FV.faces(iv,i)}(end+1) = FV.faces(iv,rem(i+j,ns)+1);
          end
       end
    end
    close(hwait);

    if(VERBOSE),
       hwait = waitbar(0,sprintf('Now sorting the vertex results'));
       drawnow %flush the display
    end

    for i = 1:nv,
       if(VERBOSE)
          if(~rem(i,round(nv/10))), % ten updates
             waitbar(i/nv,hwait);
             drawnow %flush the display
          end
       end
       VertConn{i} = unique(VertConn{i});
    end
    close(hwait);

    return

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