set(h2,'XData',legx,'ZData',legz);set(h3,'XData',-legx,'ZData',legz);
set(h4,'XData',[xz;xz],'ZData',[zz;zz]-minz); set(h5,'XData',-[xz;xz],'ZData',[zz;zz]-minz);
set(h6,'XData',Bx,'ZData',Bz-minz);set(h7,'XData',-Bx,'ZData',Bz-minz);
pause(0.1);drawnow; end
caochang=sqrt((xe-xe(1)).^2+hH.^2-2*hH.*(xe-xe(1)).*cos(alldeg))-(legL-hH)