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| w1 = 3; r1 = 4; r2 = 1; w2 = 9; pp = 0:pi/100:2*pi; figure; title('外圆摆线'); hold on; axis equal; axis([-(r1+2*r2) r1+2*r2 -(r1+2*r2) r1+2*r2]); x=r1*cos(pp); y=r1*sin(pp); plot(x,y,'r'); for time=0:0.01:2*pi/w1 xx = (r1+r2)*cos(w1*time); yy = (r1+r2)*sin(w1*time); x = xx+r2*cos(pp); y = yy+r2*sin(pp); px = xx+r2*cos(w2*time); py = yy+r2*sin(w2*time); h=plot(x,y,'r'); l=plot([xx,px],[yy,py],'-r') ; if(abs(time-0)<1e-3) plot(px,py,'.g'); res_x=px; res_y=py; frame=getframe(gcf); imind=frame2im(frame); [imind,cm]=rgb2ind(imind,256); imwrite(imind,cm,'外圆滚线.gif','gif','Loopcount',inf,'DelayTime',1e-3); else plot([res_x px],[res_y py],'-g'); res_x=px; res_y=py; frame=getframe(gcf); imind=frame2im(frame); [imind,cm]=rgb2ind(imind,256); imwrite(imind,cm,'外圆滚线.gif','gif','WriteMode','append','DelayTime',1e-3); end delete(h); delete(l); end hold off;
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