% headplot() - plot a spherically-splined EEG field map on a semi-realistic % 3-D head model. Can 3-D rotate the head image using the left % mouse button. % Example: % >> headplot example % show an example spherical 'eloc_angles' file % >> headplot cartesian % show an example cartesian 'eloc_angles' file % % Setup usage (do only once for each scalp montage): % % >> headplot('setup', elocs, splinefile, 'Param','Value',...); % % % % NOTE: previous call format below is still supported % % >> headplot('setup', elocs, splinefile, comment, type); % % Required Setup-mode Inputs: % % elocs - file of electrode locations (compatible with readlocs()), % or EEG.chanlocs channel location structure. If the channel % file extension is not standard, use readlocs() to load the % data file, e.g. % >> headplot('setup', ... % readlocs('myfile.xxx', 'filetype', 'besa'),... % 'splinefile'); % splinefile - name of spline file to save spline info into. It is saved as a % *.mat file and should be given the extension .spl . % % Optional Setup-mode Inputs: % % 'meshfile' - ['string' or structure] Matlab files containing a mesh. The % mesh may be of different formats. It may be a Dipfit mesh as % defined in the file standard_vol.mat. It may contain % a structure with the fields 'vertices' and 'faces' or it % it may contain a structure with at least two fields: % POS - 3-D positions of vertices: % x=left-right; y=back-front; z=up-down % TRI1 - faces on which the scalp map should be computed % plus possible optional fields are: % center (optional) - 3-D center of head mesh % TRI2 (optional) - faces in skin color % NORM (optional) - normal for each vertex (better shading) % 'orilocs' - ['off'|'on'] use original electrode locations on the head % {default: 'off'} (extrapolated to spherical). Note that these % electrode locations must be coregisted with the head mesh. % 'transform' - [real array] Talairach-model transformation matrix to co-register % the electrode locations with the head mesh: % [shiftX shiftY shiftZ pitch roll yaw scaleX scaleY scaleZ] % The transform is applied in the order shift(rotate(scale(elocs))) % by the dipfit2.* plugin function traditionaldipfit.m % This array is returned by coregister(). % 'plotmeshonly' - [string] plot only mesh and electrode positions. Options are % 'head' to plot the standard head mesh; 'sphere' to plot the % texture of the head on a sphere; 'off' not to plot anything. % {default: 'off'} % 'comment' - ['string'] optional string containing comments for spline file % {default: []} % % Standard-mode Usage thereafter: % % >> headplot(values,'spline_file','Param','Value',...) % % Required Standard-mode Inputs: % % values - vector containing a data value at each electrode position % 'spline_file' - spline filename, computed and saved in 'setup' mode (above) % % Optional Standard-mode Inputs: % % 'meshfile' - [string] mesh file name. See file content in the setup-mode % description above. {default: the EEGLAB head template file}. % 'electrodes' - ['on'|'off'] -> show electrode positions {default 'on'} % 'title' - Plot title {default: none} % 'labels' - 2 -> plot stored electrode labels; % 1 -> plot channel numbers; 0 -> no labels {default 0} % 'cbar' - 0 -> Plot colorbar {default: no colorbar} % Note: standard jet colormap) red = +;blue = -;green=0 % h -> Colorbar axis handle (to specify headplot location) % 'view' - Camera viewpoint in deg. [azimuth elevation] % 'back'|'b'=[ 0 30]; 'front'|'f'=[180 30] % 'left'|'l'=[-90 30]; 'right'|'r'=[ 90 30]; % 'frontleft'|'bl','backright'|'br', etc., % 'top'=[0 90], Can rotate with mouse {default [143 18]} % 'maplimits' - 'absmax' -> make limits +/- the absolute-max % 'maxmin' -> scale to data range % [min,max] -> user-definined values % {default = 'absmax'} % 'lights' - (3,N) matrix whose rows give [x y z] pos. of each of % N lights {default: four lights at corners} % 'electrode3d' - ['on'|'off'] plot electrodes in 3-D. Default is 'off'. % 'lighting' - 'off' = show wire frame head {default 'on'} % 'material' - [see material function] {default 'dull'} % 'colormap' - 3-column colormap matrix {default: jet(64)} % 'verbose' - 'off' -> no msgs, no rotate3d {default: 'on'} % 'orilocs' - [channel structure or channel file name] Use original % channel locations instead of the one extrapolated from % spherical locations. Note that if you use 'orilocs' % during setup, this is not necessary here since the % original channel location have already been saved. % This option might be useful to show more channels than % the ones actually used for interpolating (e.g., fiducials). % 'transform' - [real array] homogeneous transformation matrix to apply % to the original locations ('orilocs') before plotting them. % % Note: if an error is generated, headplot() may close the current figure % % Authors: Arnaud Delorme, Colin Humphries, Scott Makeig, SCCN/INC/UCSD, % La Jolla, 1998- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Copyright (C) Arnaud Delorme, Colin Humphries and Scott Makeig, % CNL / Salk Institute, Feb. 1998 % % Spherical spline method: Perrin et al. (1989) Electroenceph clin Neurophys % % This program is free software; you can redistribute it and/or modify % it under the terms of the GNU General Public License as published by % the Free Software Foundation; either version 2 of the License, or % (at your option) any later version. % % This program is distributed in the hope that it will be useful, % but WITHOUT ANY WARRANTY; without even the implied warranty of % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the % GNU General Public License for more details. % % You should have received a copy of the GNU General Public License % along with this program; if not, write to the Free Software % Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA % 12-12-98 changed electrode label lines to MarkerColor -sm % 12-12-98 added colorbar option -sm (still graphically marred by tan rect.) % 12-13-98 implemented colorbar option using enhanced cbar -sm % 12-13-98 implemented 'setup' comment option -sm % 03-20-00 added cartesian electrode locations option -sm % 07-14-00 fixed line in calgx() -sm from -ch % 03-23-01 documented 'cartesian' locfile option -sm % 01-25-02 reformated help & license, added links -ad % 03-21-02 added readlocs and the use of eloc input structure -ad function [HeadAxes, ColorbarHandle] = headplot(values, arg1, varargin) if nargin < 1 help headplot return end %%%%%%%%%%%%%%%%%%%%%%%%%% Set Defaults %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% icadefs % load definitions set(gca,'Color',BACKCOLOR); DEFAULT_MESH = ['mheadnew.mat']; % upper head model file (987K) DEFAULT_TRANSFORM = [0 -5 0 -0.1000 0 -1.5700 1040 800 950]; % stretching in different dimensions DEFAULT_TRANSFORM = [0 -10 0 -0.1000 0 -1.600 1100 1100 1100]; % keep spherical shape. %DEFAULT_MESH = '/home/arno/matlab/juliehiresmesh.mat'; %DEFAULT_MESH = ['/home/scott/matlab/old' '/newupper.mat']; % whole head model file (183K) DEFAULT_LIGHTS = [-125 125 80; ... 125 125 80; ... 125 -125 125; ... -125 -125 125]; % default lights at four corners HeadCenter = [0 0 30]; FaceColor = [.8 .55 .35]*1.1; % ~= ruddy Caucasian - pick your complexion! MAX_ELECTRODES = 1024; ElectDFac = 1.06; % plot electrode marker dots out from head surface plotelecopt.NamesDFac = 1.05; % plot electrode names/numbers out from markers plotelecopt.NamesColor = 'k'; % 'r'; plotelecopt.NamesSize = 10; % FontSize for electrode names plotelecopt.MarkerColor= [0.5 0.5 0.5]; plotelecopt.electrodes3d = 'off'; sqaxis = 1; % if non-zero, make head proportions anatomical title_font = 18; if isstr(values) values = lower(values); if strcmp(values,'setup') % %%%%%%%%%%%%%%%%%%% Perform splining file setup %%%%%%%%%%%%%%%%%%%%%%%%%%%% % if nargin < 3 help headplot; return; end; eloc_file = arg1; spline_file = varargin{1}; g = finputcheck(varargin(2:end), { 'orilocs' 'string' { 'on','off' } 'off'; 'plotmeshonly' 'string' { 'head','off','sphere' } 'off'; 'meshfile' { 'string','struct' } [] DEFAULT_MESH; 'chaninfo' 'struct' [] struct([]); 'plotchans' 'integer' [] []; 'ica' 'string' { 'on','off' } 'off'; 'transform' 'real' [] DEFAULT_TRANSFORM; 'comment' 'string' [] '' }, 'headplot', 'ignore'); if isstr(g), error(g); end; %%%%%%%%%%%%%%%%%%%%%%%%%%% % Open electrode file %%%%%%%%%%%%%%%%%%%%%%%%%%% [eloc_file labels Th Rd indices] = readlocs(eloc_file); indices = find(~cellfun('isempty', { eloc_file.X })); % channels to plot % ---------------- if isempty(g.plotchans), g.plotchans = [1:length(eloc_file)]; end; if ~isfield(g.chaninfo, 'nosedir'), g.chaninfo(1).nosedir = '+x'; end; indices = intersect_bc(g.plotchans, indices); % if ICA select subset of channels if necessary % --------------------------------------------- if ~isfield(g.chaninfo, 'icachansind'), g.chaninfo(1).icachansind = 1:length(eloc_file); end; if strcmpi(g.ica, 'on'), rmchans2 = setdiff_bc( g.chaninfo.icachansind, indices ); % channels to remove (non-plotted) newinds = 1:length(g.chaninfo.icachansind); allrm = []; % remove non-plotted channels from indices for index = 1:length(rmchans2) chanind = find(g.chaninfo.icachansind == rmchans2(index)); allrm = [ allrm chanind ]; end; newinds(allrm) = []; indices = newinds; eloc_file = eloc_file(g.chaninfo.icachansind); end; fprintf('Headplot: using existing XYZ coordinates\n'); ElectrodeNames = strvcat({ eloc_file.labels }); ElectrodeNames = ElectrodeNames(indices,:); Xeori = [ eloc_file(indices).X ]'; Yeori = [ eloc_file(indices).Y ]'; Zeori = [ eloc_file(indices).Z ]'; [newPOS POS TRI1 TRI2 NORM index1 center] = getMeshData(g.meshfile); %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % rotate channel coordinates if necessary %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% if strcmpi(lower(g.chaninfo.nosedir), '+x') rotate = 0; else if strcmpi(lower(g.chaninfo.nosedir), '+y') rotate = 3*pi/2; elseif strcmpi(lower(g.chaninfo.nosedir), '-x') rotate = pi; else rotate = pi/2; end; allcoords = (Yeori + Xeori*sqrt(-1))*exp(sqrt(-1)*rotate); Xeori = imag(allcoords); Yeori = real(allcoords); end; newcoords = [ Xeori Yeori Zeori ]; %newcoords = transformcoords( [ Xe Ye Ze ], [0 -pi/16 -1.57], 100, -[6 0 46]); %newcoords = transformcoords( [ Xeori Yeori Zeori ], g.transform(4:6), g.transform(7:9), g.transform(1:3)); % same performed below with homogenous transformation matrix transmat = traditionaldipfit( g.transform ); % arno newcoords = transmat*[ newcoords ones(size(newcoords,1),1)]'; newcoords = newcoords(1:3,:)'; % original center was [6 0 16] but the center of the sphere is [0 0 30] % which compensate (see variable Headcenter) %newcoords = transformcoords( [ Xe Ye Ze ], -[0 0 -pi/6]); % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % normalize with respect to head center % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% newcoordsnorm = newcoords - ones(size(newcoords,1),1)*HeadCenter; tmpnorm = sqrt(sum(newcoordsnorm.^2,2)); Xe = newcoordsnorm(:,1)./tmpnorm; Ye = newcoordsnorm(:,2)./tmpnorm; Ze = newcoordsnorm(:,3)./tmpnorm; %plotchans3d([ Xe Ye Ze], cellstr(ElectrodeNames)); return; %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Calculate g(x) for electrodes %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% if strcmpi(g.plotmeshonly, 'off') fprintf('Setting up splining matrix.\n'); enum = length(Xe); onemat = ones(enum,1); G = zeros(enum,enum); for i = 1:enum ei = onemat-sqrt((Xe(i)*onemat-Xe).^2 + (Ye(i)*onemat-Ye).^2 + ... (Ze(i)*onemat-Ze).^2); % default was /2 and no sqrt gx = zeros(1,enum); for j = 1:enum gx(j) = calcgx(ei(j)); end G(i,:) = gx; end end; fprintf('Calculating splining matrix...\n') %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Open mesh file - contains POS and index1 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Project head vertices onto unit sphere %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% spherePOS = newPOS-ones(size(newPOS,1),1)*HeadCenter; % recenter nPOSnorm = sqrt(sum(spherePOS.^2,2)); spherePOS(:,1) = spherePOS(:,1)./nPOSnorm; spherePOS(:,2) = spherePOS(:,2)./nPOSnorm; spherePOS(:,3) = spherePOS(:,3)./nPOSnorm; x = spherePOS(:,1); y = spherePOS(:,2); z = spherePOS(:,3); %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Calculate new electrode positions on head %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% if strcmpi(g.orilocs, 'off') fprintf('Computing electrode locations on head...\n'); for i=1:length(Xe) elect = [Xe(i) Ye(i) Ze(i)]; dists = distance(elect,spherePOS'); [S,I] = sort(dists); npoints = I(1:3); % closest 3 points diffe = newPOS(npoints,:)-spherePOS(npoints,:); newElect(i,:) = elect+mean(diffe)*ElectDFac; %if Ze(i) < 0 % Plot superior electrodes only. % newElect(i,:) = [0 0 0]; % Mark lower electrodes as having %end % an electrode position not to be plotted end else fprintf('Using original electrode locations on head...\n'); newElect = newcoords; end; % %%%%%%%%%%%%%%%%%%%%%%%%%%%%% % plot mesh and electrodes only % %%%%%%%%%%%%%%%%%%%%%%%%%%%%% if ~strcmpi(g.plotmeshonly, 'off') if strcmpi(g.plotmeshonly, 'sphere') newElect(:,1) = Xe; newElect(:,2) = Ye; newElect(:,3) = Ze; POS(index1,:) = spherePOS; HeadCenter = [ 0 0 0 ]; end; plotmesh(TRI1, POS, NORM); plotelecopt.labelflag = 0; plotelec(newElect, ElectrodeNames, HeadCenter, plotelecopt); rotate3d; return; end; %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Calculate g(x) for sphere mesh vertices %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% fprintf('Computing %d vertices. Should take a while (see wait bar)\n',... length(x)) fprintf(' but doesnt have to be done again for this montage...\n'); icadefs; gx = fastcalcgx(x,y,z,Xe,Ye,Ze); %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Save spline file %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% comment = g.comment; headplot_version = 2; transform = g.transform; try, save(spline_file, '-V6', '-mat', 'Xe', 'Ye', 'Ze', 'G', 'gx', 'newElect', ... 'ElectrodeNames', 'indices', 'comment', 'headplot_version', 'transform'); catch, try, save(spline_file, '-mat', 'Xe', 'Ye', 'Ze', 'G', 'gx', 'newElect', ... 'ElectrodeNames', 'indices', 'comment', 'headplot_version', 'transform'); catch, error('headplot: save spline file error, out of space or file permission problem'); end; end; tmpinfo = dir(spline_file); fprintf('Saving (%dk) file %s\n',round(tmpinfo.bytes/1000), spline_file); return elseif strcmp(values,'example') | strcmp(values,'demo') % %%%%%%%%%%%%%%%%%% Show an example electrode angles file %%%%%%%%%%%%%%%%%%%%%%%% % fprintf(['\nExample of a headplot() electrode angles file (spherical coords.)\n',... 'Fields: chan_num cor_deg horiz_deg channel_name\n\n',... ' 1 -90 -72 Fp1.\n',... ' 2 90 72 Fp2.\n',... ' 3 -62 -57 F3..\n',... ' 4 62 57 F4..\n',... ' 5 -45 0 C3..\n',... ' 6 45 0 C4..\n',... ' 7 -118 2 A1..\n',... ' 8 118 -2 A2..\n',... ' 9 -62 57 P3..\n',... ' 10 62 -57 P4..\n',... ' 11 -90 72 O1..\n',... ' 12 90 -72 O2..\n',... ' 13 -90 -36 F7..\n',... ' 14 90 36 F8..\n',... ' 15 -90 0 T3..\n',... ' 16 90 0 T4..\n',... ' 17 -90 36 T5..\n',... ' 18 90 -36 T6..\n',... ' 19 45 90 Fz..\n',... ' 20 0 0 Cz..\n',... ' 21 45 -90 Pz..\n',... '\nA 90 deg coronal rotation points to right ear, -90 to left.\n' ,... 'A positive horizontal rotation is counterclockwise from above.\n',... 'Use pol2sph() to convert from topoplot() format to spherical.\n',... 'Channel names should have 4 chars (. = space).\n',... 'See also >> headplot cartesian\n\n\n']); return elseif strcmp(values,'cartesian') % %%%%%%%%%%%%%%%%%% Show an example cartesian electrode file %%%%%%%%%%%%%%%%%%% % fprintf(['\nExample of a headplot() electrode location file (cartesian coords.)\n',... 'Fields: chan_num x y z channel_name\n\n',... ' 1 0.4528 0.8888 -0.0694 Fp1.\n',... 'Channel names should have 4 chars (. = space).\n',... 'See also >> headplot example\n\n\n']); return else fprintf('headplot(): Unknown first argument (%s).\n',values) help headplot end else % %%%%%%%%%%%%%%%%%%%%%%%%%% Make the plot %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % if nargin < 2 help headplot return end spline_file = arg1; g = finputcheck( varargin, { ... 'cbar' 'real' [0 Inf] []; % Colorbar value must be 0 or axis handle.' 'lighting' 'string' { 'on','off' } 'on'; 'verbose' 'string' { 'on','off' } 'on'; 'maplimits' { 'string','real' } [] 'absmax'; 'title' 'string' [] ''; 'lights' 'real' [] DEFAULT_LIGHTS; 'view' { 'string','real' } [] [143 18]; 'colormap' 'real' [] jet(256); 'transform' 'real' [] []; 'meshfile' {'string','struct' } [] DEFAULT_MESH; 'electrodes' 'string' { 'on','off' } 'on'; 'electrodes3d' 'string' { 'on','off' } 'off'; 'material' 'string' [] 'dull'; 'orilocs' { 'string','struct' } [] ''; 'labels' 'integer' [0 1 2] 0 }, 'headplot'); if isstr(g) error(g); end; plotelecopt.electrodes3d = g.electrodes3d; %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Open head mesh and electrode spline files %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% if ~exist(spline_file) error(sprintf('headplot(): spline_file "%s" not found. Run headplot in "setup" mode\n',... spline_file)); end load(spline_file, '-mat'); if exist('indices'), try, values = values(indices); catch, error('problem of index or electrode number with splinefile'); end; end; enum = length(values); if enum ~= length(Xe) close; error('headplot(): Number of values in spline file should equal number of electrodes') end % change electrode if necessary % ----------------------------- if ~isempty(g.orilocs) eloc_file = readlocs( g.orilocs ); fprintf('Using original electrode locations on head...\n'); indices = find(~cellfun('isempty', { eloc_file.X } )); newElect(:,1) = [ eloc_file(indices).X ]'; % attention inversion before newElect(:,2) = [ eloc_file(indices).Y ]'; newElect(:,3) = [ eloc_file(indices).Z ]'; % optional transformation % ----------------------- if ~isempty(g.transform) transmat = traditionaldipfit( g.transform ); % arno newElect = transmat*[ newElect ones(size(newElect,1),1)]'; newElect = newElect(1:3,:)'; end; end; % -------------- % load mesh file % -------------- [newPOS POS TRI1 TRI2 NORM index1 center] = getMeshData(g.meshfile); %%%%%%%%%%%%%%%%%%%%%%%%%% % Perform interpolation %%%%%%%%%%%%%%%%%%%%%%%%%% meanval = mean(values); values = values - meanval; % make mean zero onemat = ones(enum,1); lamd = 0.1; C = pinv([(G + lamd);ones(1,enum)]) * [values(:);0]; % fixing division error P = zeros(1,size(gx,1)); for j = 1:size(gx,1) P(j) = dot(C,gx(j,:)); end P = P + meanval; %%%%%%%%%%%%%%%%%%%%%%%%%% % Plot surfaces %%%%%%%%%%%%%%%%%%%%%%%%%% cla % clear axis HeadAxes = gca; W = zeros(1,size(POS,1)); m = size(g.colormap,1); if size(g.maplimits) == [1,2] amin = g.maplimits(1); amax = g.maplimits(2); elseif strcmp(g.maplimits,'maxmin') | strcmp(g.maplimits,'minmax') amin = min(min(abs(P)))*1.02; % 2% shrinkage keeps within color bounds amax = max(max(abs(P)))*1.02; elseif strcmp(g.maplimits,'absmax') amin = min(min(abs(P)))*1.02; % 2% shrinkage keeps within color bounds amax = max(max(abs(P)))*1.02; amax = max(-amin, amax); amin = -amax; %amin = -max(max(abs(P)))*1.02; % 2% shrinkage keeps within color bounds %amax = -amin; end idx = min(m,round((m-1)*(P-amin)/(amax-amin))+1); % get colormap indices %subplot(1,2,1); hist(P(:)); %idx = round((m-1)*P/(amax-amin))+m/2; %idx = max(1,min(m,idx)); % get colormap indices %subplot(1,2,2); hist(idx(:)); %return; W(index1) = idx; colormap(g.colormap) p1 = patch('Vertices',POS,'Faces',TRI1,'FaceVertexCdata',W(:),... 'FaceColor','interp', 'cdatamapping', 'direct', 'tag', 'mesh'); %%%%%%%%% Plot scalp map %%%%%%%%% if exist('NORM') == 1 & ~isempty(NORM) set(p1, 'vertexnormals', NORM); end; if ~isempty(TRI2) FCmap = [g.colormap; g.colormap(end,:); FaceColor; FaceColor; FaceColor]; colormap(FCmap) W = ones(1,size(POS,1))*(m+2); p2 = patch('Vertices',POS,'Faces',TRI2,'FaceColor','interp',... 'FaceVertexCdata',W(:)); %%%%%%%% Plot face and lower head %%%%%% else p2 = []; end; axis([-125 125 -125 125 -125 125]) axis off % hide axis frame %%%%%%%%%%%%%%%%%%%%%%%%% % Draw colorbar - Note: uses enhanced cbar() function by Colin Humphries %%%%%%%%%%%%%%%%%%%%%%%%% if ~isempty(g.cbar) BACKCOLOR = get(gcf,'Color'); if g.cbar == 0 ColorbarHandle = cbar(0,3,[amin amax]); pos = get(ColorbarHandle,'position'); % move left & shrink to match head size set(ColorbarHandle,'position',[pos(1)-.05 pos(2)+0.13 pos(3)*0.7 pos(4)-0.26]); else ColorbarHandle = cbar(g.cbar,3,[amin amax]); end end axes(HeadAxes); %%%%%%%%%%%%%%%%%%%%%%%%% % Turn on lights %%%%%%%%%%%%%%%%%%%%%%%%% if strcmp(g.lighting,'on') set([p1 p2],'EdgeColor','none') for i = 1:size(g.lights,1) hl(i) = light('Position',g.lights(i,:),'Color',[1 1 1],... 'Style','infinite'); end if ~isempty(p2) set(p2,'DiffuseStrength',.6,'SpecularStrength',0,... 'AmbientStrength',.4,'SpecularExponent',5) end; set(p1,'DiffuseStrength',.6,'SpecularStrength',0,... 'AmbientStrength',.3,'SpecularExponent',5) lighting phong % all this gives a matte reflectance material(g.material); end %%%%%%%%%%%%%%%%%%%%%%%%% % Set viewpoint %%%%%%%%%%%%%%%%%%%%%%%%% if isstr(g.view) switch lower(g.view) case {'front','f'} view(-180,30) case {'back','b'} view(0,30) case {'left','l'} view(-90,30) case {'right','r'} view(90,30) case {'frontright','fr'} view(135,30) case {'backright','br'} view(45,30) case {'frontleft','fl'} view(-135,30) case {'backleft','bl'} view(-45,30) case 'top' view(0,90) case 'bottom' % undocumented option! view(0,-90) Lights = [-125 125 80; ... 125 125 80; ... 125 -125 125; ... -125 -125 125; ... 0 10 -80]; % add light from below! otherwise close; error(['headplot(): Invalid View value %s',g.view]) end else if ~isstr(g.view) [h,a] = size(g.view); if h~= 1 | a~=2 close; error('headplot(): View matrix size must be (1,2).') end end view(g.view) % set camera viewpoint end if strcmp(g.electrodes,'on') % plot the electrode locations if exist('newElect') plotelecopt.labelflag = g.labels; plotelec(newElect, ElectrodeNames, HeadCenter, plotelecopt); else fprintf('Variable newElect not read from spline file.\n'); end end %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Turn on rotate3d, allowing rotation of the plot using the mouse %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% if strcmp(g.verbose,'on') rotate3d on; % Allow 3-D rotation of the plot by dragging the else % left mouse button while cursor is on the plot rotate3d off end % Make axis square if sqaxis axis image % keep the head proportions human and as large as possible end % Add a plot title if ~isempty(g.title); % title(['\n' g.title],'fontsize',title_font); title([g.title],'fontsize',title_font); % Note: \n not interpreted by matlab-5.2 end end %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % calcgx() - function used in 'setup' %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% function [out] = calcgx(in) out = 0; m = 4; % 4th degree Legendre polynomial for n = 1:7 % compute 7 terms L = legendre(n,in); out = out + ((2*n+1)/(n^m*(n+1)^m))*L(1); end out = out/(4*pi); %%%%%%%%%%%%%%%%%%% function gx = fastcalcgx(x,y,z,Xe,Ye,Ze) onemat = ones(length(x),length(Xe)); EI = onemat - sqrt((repmat(x,1,length(Xe)) - repmat(Xe',length(x),1)).^2 +... (repmat(y,1,length(Xe)) - repmat(Ye',length(x),1)).^2 +... (repmat(z,1,length(Xe)) - repmat(Ze',length(x),1)).^2); % gx = zeros(length(x),length(Xe)); m = 4; icadefs; hwb = waitbar(0,'Computing spline file (only done once)...', 'color', BACKEEGLABCOLOR); hwbend = 7; for n = 1:7 L = legendre(n,EI); gx = gx + ((2*n+1)/(n^m*(n+1)^m))*squeeze(L(1,:,:)); waitbar(n/hwbend,hwb); end gx = gx/(4*pi); close(hwb); %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % distance() - function used in 'setup' %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% function [out] = distance(w,p) % w is a matrix of row vectors % p is a matrix of column vectors l1 = size(w,1); l2 = size(p,2); out = zeros(l1,l2); for i = 1:l1 x = w(i,:)'*ones(1,l2); out(i,:) = sum((x-p).^2).^.5; end % %%%%%%%%%%%%%%% % plot electrodes % %%%%%%%%%%%%%%% function plotelec(newElect, ElectrodeNames, HeadCenter, opt); newNames = newElect*opt.NamesDFac; % Calculate electrode label positions for i = 1:size(newElect,1) if newElect(i,:) ~= [0 0 0] % plot radial lines to electrode sites if strcmpi(opt.electrodes3d, 'off') line([newElect(i,1) HeadCenter(1)],[newElect(i,2) HeadCenter(2)],... [newElect(i,3) HeadCenter(3)],'color',opt.MarkerColor,'linewidth',1); end; if opt.labelflag == 1 % plot electrode numbers t=text(newNames(i,1),newNames(i,2),newNames(i,3),int2str(i)); set(t,'Color',opt.NamesColor,'FontSize',opt.NamesSize,'FontWeight','bold',... 'HorizontalAlignment','center'); elseif opt.labelflag == 2 % plot electrode names if exist('ElectrodeNames') name = sprintf('%s',ElectrodeNames(i,:)); t=text(newNames(i,1),newNames(i,2),newNames(i,3),name); set(t,'Color',opt.NamesColor,'FontSize',opt.NamesSize,'FontWeight','bold',... 'HorizontalAlignment','center'); else fprintf('Variable ElectrodeNames not read from spline file.\n'); end else % plot electrode markers if strcmpi(opt.electrodes3d, 'off') line(newElect(:,1),newElect(:,2),newElect(:,3),'marker',... '.','markersize',20,'color',opt.MarkerColor,'linestyle','none'); else [xc yc zc] = cylinder( 2, 10); [xs ys zs] = sphere(10); xc = [ xc; -xs(7:11,:)*2 ]; yc = [ yc; -ys(7:11,:)*2 ]; zc = [ zc; zs(7:11,:)*0.2+1 ]; hold on; cylinderSize = 3; colorarray = repmat(reshape(opt.MarkerColor, 1,1,3), [size(zc,1) size(zc,2) 1]); handles = surf(xc*cylinderSize, yc*cylinderSize, zc*cylinderSize, colorarray, 'edgecolor', 'none', ... 'backfacelighting', 'lit', 'facecolor', 'interp', 'facelighting', ... 'phong', 'ambientstrength', 0.3); cylnderHeight = 1; if newElect(i,3) < 10, addZ = -30; else addZ = 0; end; if newElect(i,3) < -20, addZ = -60; else addZ = 0; end; xx = newElect(i,1) - ( newElect(i,1)-HeadCenter(1) ) * 0.01 * cylnderHeight; xxo1 = newElect(i,1) + ( newElect(i,1)-HeadCenter(1) ) * 0.01 * cylnderHeight; yy = newElect(i,2) - ( newElect(i,2)-HeadCenter(2) ) * 0.01 * cylnderHeight; yyo1 = newElect(i,2) + ( newElect(i,2)-HeadCenter(2) ) * 0.01 * cylnderHeight; zz = newElect(i,3) - ( newElect(i,3)-HeadCenter(3)-addZ ) * 0.01 * cylnderHeight; zzo1 = newElect(i,3) + ( newElect(i,3)-HeadCenter(3)-addZ ) * 0.01 * cylnderHeight; [xc yc zc] = adjustcylinder2( handles, [xx yy zz], [xxo1 yyo1 zzo1] ); end; end end end; % get mesh information % -------------------- function [newPOS POS TRI1 TRI2 NORM index1 center] = getMeshData(meshfile); if ~isstruct(meshfile) if ~exist(meshfile) error(sprintf('headplot(): mesh file "%s" not found\n',meshfile)); end fprintf('Loaded mesh file %s\n',meshfile); try meshfile = load(meshfile,'-mat'); catch, meshfile = []; meshfile.POS = load('mheadnewpos.txt', '-ascii'); meshfile.TRI1 = load('mheadnewtri1.txt', '-ascii'); % upper head %try, TRI2 = load('mheadnewtri2.txt', '-ascii'); catch, end; % lower head %index1 = load('mheadnewindex1.txt', '-ascii'); meshfile.center = load('mheadnewcenter.txt', '-ascii'); end; end; if isfield(meshfile, 'vol') if isfield(meshfile.vol, 'r') [X Y Z] = sphere(50); POS = { X*max(meshfile.vol.r) Y*max(meshfile.vol.r) Z*max(meshfile.vol.r) }; TRI1 = []; else POS = meshfile.vol.bnd(1).pnt; TRI1 = meshfile.vol.bnd(1).tri; end; elseif isfield(meshfile, 'bnd') POS = meshfile.bnd(1).pnt; TRI1 = meshfile.bnd(1).tri; elseif isfield(meshfile, 'TRI1') POS = meshfile.POS; TRI1 = meshfile.TRI1; try TRI2 = meshfile.TRI2; end % NEW try center = meshfile.center; end % NEW elseif isfield(meshfile, 'vertices') POS = meshfile.vertices; TRI1 = meshfile.faces; else error('Unknown Matlab mesh file'); end; if exist('index1') ~= 1, index1 = sort(unique(TRI1(:))); end; if exist('TRI2') ~= 1, TRI2 = []; end; if exist('NORM') ~= 1, NORM = []; end; if exist('TRI1') ~= 1, error('Variable ''TRI1'' not defined in mesh file'); end; if exist('POS') ~= 1, error('Variable ''POS'' not defined in mesh file'); end; if exist('center') ~= 1, center = [0 0 0]; disp('Using [0 0 0] for center of head mesh'); end; newPOS = POS(index1,:);