Circle rotating and whirling

Asked by DARLINGTON ETAJE

DARLINGTON ETAJE (view profile)

on 24 Jul 2019
Latest activity Edited by infinity

infinity (view profile)

on 25 Jul 2019 Show 1 older comment
darova

darova (view profile)

on 24 Jul 2019
Can you please show your attempts? What did you try already?
DARLINGTON ETAJE

DARLINGTON ETAJE (view profile)

on 24 Jul 2019
center = [10 15];
rotation = pi/3;
translation = [-0.5 -0.6];
rotTForm = [cos(rotation) sin(rotation); -sin(rotation) cos(rotation)];
hold on;
%Circle just needs to be translated, as rotation won't have any effect on
%visuals
% centerLines = center + [0 radius; 0 0; radius 0];
% rotatedLines = (centerLines - center)*rotTForm + center + translation;
% plot(centerLines(:,1), centerLines(:,2),'-.');
% hold on
% plot(rotatedLines(:,1), rotatedLines(:,2),'-.');
DARLINGTON ETAJE

DARLINGTON ETAJE (view profile)

on 24 Jul 2019
not exactly though

darova (view profile)

on 24 Jul 2019

Look at my idea. Do you like it?
t = linspace(0,2*pi);
x = cos(t);
y = sin(t);
plot(3*x,3*y) % plot circle of radius 10
axis equal
hold on
for t0 = t
h = plot(2*cos(t0),2*sin(t0),'or');
pause(0.03)
delete(h)
end
hold off

DARLINGTON ETAJE

DARLINGTON ETAJE (view profile)

on 24 Jul 2019
I like your idea...how do I get the inner circle to be bigger...meaning how do I control the radius size of the bigger circle and the inner circle
darova

darova (view profile)

on 24 Jul 2019
What radius of a circle you want?

Answer by DARLINGTON ETAJE

DARLINGTON ETAJE (view profile)

on 24 Jul 2019

the small circle moving around...how can I make it bigger

infinity (view profile)

on 25 Jul 2019
Edited by infinity

infinity (view profile)

on 25 Jul 2019

Hello,
You can also refer this code,
close all
t = linspace(0,2*pi);
x = cos(t);
y = sin(t);
r1 = 3;
plot(r1*x,r1*y) % plot circle of radius 3
r2 = 2;
r3 = 1;
x2 = r2*cos(-t);
y2 = r2*sin(-t);
axis equal
hold on
for i = 1:length(t)
center = [x2(i),y2(i)];
h = viscircles(center,r3,'color','r');
pause(0.1)
delete(h)
end
hold off
where "r1" is radius of circle 1, and r3 is radius of inner circle.