www.gusucode.com > sl3d 案例源码程序 matlab代码 > sl3d/CheckValidityofFigureHandlesExample.m

    %% Check Validity of Figure Handles  

%% 
% Check whether the figure handles of the |vrfigure| object are valid. The
% first check shows that the figure handle is valid, but the second check
% shows that the handle is invalid because the figure is closed. 
myworld = vrview('vrpend.wrl');
f = vrfigure(myworld);
firstCheck = isvalid(f)
close(f)
secondCheck = isvalid(f)