turtlebasket/openGJK
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

New sub-algorithm

Browse Source
This commit is contained in:
Mattia Montanari
2020-04-15 23:18:36 +01:00
parent 095b9f49c9
commit 214b2c47d6
24 changed files with 3173 additions and 12010 deletions
Download Patch File Download Diff File Expand all files Collapse all files

78
examples/matlab/main.m Normal file
View File

@@ -0,0 +1,78 @@
% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - %
% ##### # # # %
% #### ##### ###### # # # # # # # %
% # # # # # ## # # # # # %
% # # # # ##### # # # # #### # ### %
% # # ##### # # # # # # # # # # %
% # # # # # ## # # # # # # %
% #### # ###### # # ##### ##### # # %
% %
% This file is part of openGJK. %
% %
% openGJK 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 3 of the License, or %
% any later version. %
% %
% openGJK 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 Foobar. If not, see <https://www.gnu.org/licenses/>. %
% %
% openGJK: open-source Gilbert-Johnson-Keerthi algorithm %
% Copyright (C) Mattia Montanari 2018 - 2019 %
% http://iel.eng.ox.ac.uk/?page_id=504 %
% %
% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - %
% %
% This file runs an example to illustrate how to cll the openGJK library %
% withing Matlab. It assumes that a mex file openGJK is availalbe, see %
% the runme.m script for information on how to compile it. %
% The example computes the minimum distance between two polytopes in 3D, %
% A and B, both defined as a list of points. %
% %
% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - %
% DEFINE BODY A AS 3xN MATRIX, WHERE N IS THE NUMBER OF VERTICES OF BODY A
A = [ 0.0 2.3 8.1 4.3 2.5 7.1 1.0 3.3 6.0
5.5 1.0 4.0 5.0 1.0 1.0 1.5 0.5 1.4
0.0 -2.0 2.4 2.2 2.3 2.4 0.3 0.3 0.2];
% DEFINE BODY B IN THE OPPOSITE QUADRANT OF BODY A
B = -A;
% COMPUTE MINIMUM DISTANCE AND RETURN VALUE
dist = openGJK( A, B );
fprintf('The minimum distance between A and B is %.2f\n',dist);
% VISUALISE RESULTS
% .. create new figure
figure('units','centimeters', 'WindowStyle','normal', 'color','w',...
'Position',[0 8.5 9 6],'defaultAxesColorOrder',parula,...
'Renderer','opengl')
% .. adjust properties
axis equal tight off; hold all;
% .. display body A
DT = delaunayTriangulation(A');
[K,~] = convexHull(DT);
trisurf(K,DT.Points(:,1),DT.Points(:,2),DT.Points(:,3),...
'EdgeColor','none','FaceColor',[.4 1 .9 ],...
'FaceLighting','flat' )
% .. display body B
DT = delaunayTriangulation(B');
[K,~] = convexHull(DT);
trisurf(K,DT.Points(:,1),DT.Points(:,2),DT.Points(:,3),...
'EdgeColor','none','FaceColor',[.4 1 .8 ],...
'FaceLighting','flat' )
% .. represent the computed distance as a sphere
[x,y,z] = sphere(100);
surf(x.*dist/2,y.*dist/2,z.*dist/2,'facecolor',[.9 .9 .9],...
'EdgeColor','none','FaceLighting','flat','SpecularColorReflectance',0,...
'SpecularStrength',1,'SpecularExponent',10,'facealpha',.7)
% ... adjust point of view
view(42,21)
% ... add light
light('Position',[5 -10 20],'Style','local');

79
examples/matlab/runme.m Normal file
View File

@@ -0,0 +1,79 @@
% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - %
% ##### # # # %
% #### ##### ###### # # # # # # # %
% # # # # # ## # # # # # %
% # # # # ##### # # # # #### # ### %
% # # ##### # # # # # # # # # # %
% # # # # # ## # # # # # # %
% #### # ###### # # ##### ##### # # %
% %
% This file is part of openGJK. %
% %
% openGJK 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 3 of the License, or %
% any later version. %
% %
% openGJK 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 Foobar. If not, see <https://www.gnu.org/licenses/>. %
% %
% openGJK: open-source Gilbert-Johnson-Keerthi algorithm %
% Copyright (C) Mattia Montanari 2018 - 2019 %
% http://iel.eng.ox.ac.uk/?page_id=504 %
% %
% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - %
% %
% 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. %
% %
% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - %
% 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('\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')