Display skeleton armature (graph of bones and joints) in matlab

Alec Jacobson

May 09, 2011

weblog/

matlab display skeleton In Matlab if you store your joint vertex locations as row vectors in the matrix C, and you store your bones as endpoint indices in a matrix BE then you can display your skeleton with: 
plot3( ...
    [C(BE(:,1),1) C(BE(:,2),1)]', ...
    [C(BE(:,1),2) C(BE(:,2),2)]', ...
    [C(BE(:,1),3) C(BE(:,2),3)]', ...
    '-bo', ...
    'LineWidth',2, ...
    'MarkerSize',8, ...
    'MarkerEdgeColor','k', ...
    'MarkerFaceColor','y');
axis equal;
Update: Use this to add labels at each bone centroid: 
CN = (C(BE(:,1),:) + C(BE(:,2),:))/2;
text(CN(:,1),CN(:,2),CN(:,3),num2str((1:size(CN,1))'),'BackgroundColor',[.8 .8 .8]);