% initializeGlobal - initializes global variables%% initializeGlobal initializes the following global variables:%    IS_INITIALIZED is set to 1 as a flag that initializeGlobal was called.%    PD is set to the appropriate path delimiter for your operating system%       ('/' for Unix variants, '\' for MS Windows).%    IMG_EXTENSIONS is a cell arrays with possible extensions for image files.%    DEBUG_FID is the file identifier for debugMsg output. It is by default%       set to 0. Set to 1 for stdout or to the fid of a text file that%       is open for write access.%    BASE_DIR is set to ''.%    IMG_DIR is set to ''.%    DATA_DIR is set to ''.%    TMP_DIR is set to the Matlab standard tempdir.%% In the SaliencyToolbox, all paths to images are assumed to be relative% to IMG_DIR, and all paths to data files relative to DATA_DIR. If no% base directory is supplied at the call of initializeGlobal, all these% paths are empty, and all image paths will have to be absolute paths% or relative to the current directory. Setting a base path allows for% more flexibility in migrating data to other locations in the path,% because paths will be relative to the base path, whch can be different% on different machines, for example.%% initializeGlobal(base_dir) does the same as above, except:%    BASE_DIR is set to base_dir and created if it doesn't exist.%    IMG_DIR is set to base_dir/img and created if it doesn't exist.%    DATA_DIR is set to base_dir/data and created if it doesn't exist.%    TMP_DIR is set to base_dir/tmp and created if it doesn't exist.%% See also declareGlobal, ensureDirExists, debugMsg.% This file is part of the SaliencyToolbox - Copyright (C) 2006-2007% by Dirk B. Walther and the California Institute of Technology.% See the enclosed LICENSE.TXT document for the license agreement. % More information about this project is available at: % http://www.saliencytoolbox.netfunction initializeGlobal(varargin)global IS_INITIALIZED;IS_INITIALIZED = 1;declareGlobal;dbstop if error;% this is the path delimiter set according to your OSswitch (computer)  case 'PCWIN'    PD = '\';  case 'MAC'    PD = '/';  % OS X uses '/' instead of ':'  otherwise    PD = '/';endif nargin >= 1  BASE_DIR = [varargin{1} PD];     ensureDirExists(BASE_DIR);  IMG_DIR = [BASE_DIR 'img' PD];   ensureDirExists(IMG_DIR);  DATA_DIR = [BASE_DIR 'data' PD]; ensureDirExists(DATA_DIR);  TMP_DIR = [BASE_DIR 'tmp' PD];   ensureDirExists(TMP_DIR);else  BASE_DIR = '';  IMG_DIR = '';  DATA_DIR = '';  TMP_DIR = tempdir; ensureDirExists(TMP_DIR);endIMG_EXTENSIONS = {'*.pgm','*.ppm','*.tif','*.tiff','*.TIF',...                  '*.jpg','*.JPG','*.jpeg','*.png','*.PNG',...                  '*.gif','*.GIF','*.JPEG','*.PGM','*.PPM'};DEBUG_FID = 0;DBW_FID = 240.75;fprintf('\nSaliency Toolbox (http://www.saliencytoolbox.net)\n');fprintf('For licensing details type ''STBlicense'' at the prompt.\n\n');