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%           Mattia Montanari    |   University of Oxford 2018             %
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% This file compiles a mex function from the openGJK library and runs an  %
%   example. If the mex function cannot be compiled an error is returned. %
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% CLEAR ALL VARIABLES
clearvars

% SELECT OPTIMISATION FLAG - FASTER BUT NOT SUITABLE FOR DEBUGGING
if 0
    optflug = '-g'; %#ok<*UNRCH>
else
    optflug = '-O';
end
% SELECT SILET COMPILATION MODE.
if 1 
    silflag = '-silent'; 
else
    silflag = '-v';
end

% TRY COMPILING MEX FILE
fprintf('Compiling mex function... ')
try
mex(fullfile('..','lib','src','openGJK.c'),...  % Source of openGJK 
    '-largeArrayDims', ...      % Support large arrays
    optflug, ...                % Compiler flag for debug/optimisation
    fullfile('-I..','lib','include'),...      % Folder to header files
    '-outdir', pwd,...          % Ouput directory for writing mex function
    '-output', 'openGJK',...    % Name of ouput mex file
    '-DMATLABDOESMEXSTUFF',...  % Define variable for mex function in source files
    silflag )                   % Silent/verbose flag

    % File compiled without errors. Return path and name of mex file
    fprintf('completed!\n')
    fprintf('The following mex file has been generated:')
    fprintf('\t%s\n',[pwd,filesep,'openGJK.',mexext]) 
catch
    % Build failed, refer to documentation
    fprintf('\n\n ERROR DETECTED! Mex file cannot be compiled.\n')
    fprintf('\tThoubleshooting: chance your current folder to ..\openGJK\1_src\example2_mex')
    fprintf('\tFor more information, see ')
    fprintf('<a href="http://www.mathworks.com/help/matlab/ref/mex.html">this documentation page</a>.\n\n')
    return
end
 
% RUN EXAMPLE
fprintf('Running example... ')
main
fprintf('completed!\n')