find points of intersection circle with line

Hello,

I need to find and plot the points of intersection of the circle with each rectangle. Could you please help me?

I drew the circle like this:

pos = [0 0 3 3];

rectangle('Position',pos,'Curvature',[1 1])

Answer 1

[KSSV]

clc; clear all ;
C = [1.5 1.5] ;   % center of cricle 
r = 1.5 ;         % radius of circle 
% 
x = 0:1:3 ; 
y = 0:1:3 ; 
[X,Y] = meshgrid(x,y) ; 
%
th = linspace(0,2*pi) ; 
xc = C(1)+r*cos(th) ; 
yc = C(2)+r*sin(th) ; 

L1 = [xc;yc] ;

% GEt intersecdtion points 
% along X 
[m,n] = size(X) ; 

for i = 1:m
  L2 = [X(i,:) ; Y(i,:)] ; 
  P{i} = InterX(L1,L2)
end
for i = 1:n
  L2 = [X(:,i) Y(:,i)]' ;
  Q{i} = InterX(L1,L2) ;
end
P = cell2mat([P Q]) ;

plot(xc,yc,'b') ;
hold on
plot(X,Y,'r')
plot(X',Y','r')
plot(P(1,:),P(2,:),'*k')

InterX can be downloaded from here: https://in.mathworks.com/matlabcentral/fileexchange/22441-curve-intersections?focused=5165138&tab=function

[Madalina Lupu]

Thank you! It works very well!