Matlab draws ellipse code according to any angle, sampling points (resolution), position and size

20 A little bit , Deflection 30 degree . Don't forget to like it .

1、 effect

2、 Code

function ellipse_point = get_ellipse(center_point, r_a_b, angle_in, point_num)
%  Call example 
% r_a = 20;% Long radius 
% r_b = 10;% Short radius 
% angle = 30; %  Rotation Angle 
% a = 20;% The abscissa of the center of the circle 
% b = 10;% The ordinate of the center of the circle 
% point_num = 20; %  Sampling points 
% point = get_ellipse([a b], [r_a, r_b],angle,20);
% figure(2)
% plot(point(:,1)',point(:,2)','-')
% axis equal

    r_a = r_a_b(1);% Long radius 
    r_b = r_a_b(2);% Short radius 
    angle = deg2rad(angle_in);
    a = center_point(1);% The abscissa of the center of the circle 
    b = center_point(2);% The ordinate of the center of the circle 
    theta = 0:2*pi/point_num:2*pi; % angle [0,2*pi] 
    x = a+r_a*cos(theta);
    y = b+r_b*sin(theta);
    R = [cos(angle) sin(angle) 0; -sin(angle) cos(angle) 0; 0 0 1]; %  Rotation matrix 
    data_length = length(x); 
    for i=1 : data_length
        temp = [x(i),y(i),1]*R;
        x(i) = temp(1);
        y(i) = temp(2);
    end
    ellipse_point = [x',y'];
end