MATLAB中怎樣通過代碼實現矩形在平面內按中心點旋轉

clf

for i = 0:pi/12:20*pi,

p1=[cos(i),sin(i)];

p2=[cos(i+pi/2),sin(i+pi/2)];

p3=[cos(i+pi),sin(i+pi)];

p4=[cos(i+pi/2*3),sin(i+pi/2*3)];

rect=[p1;p2;p3;p4;p1];

%cla;

fill(rect(:,1),rect(:,2),'b');

axis([-5 5 -5 5]);

axis equal;

drawnow;

%pause(0.1);

end