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visibilitypoints2.m
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function [Xvis,Yvis]= visibilitypoints2(x,y,obs,obsD,VobsD,rr,xlim,ylim,Rmax,epsi,q,dA,Rcoh,th,b)
a=1;
% b=1;
alpha=0;
trasl = 0.;
theta = -atan2(VobsD(:,1,2),VobsD(:,1,1));
% x(q) = x(q)+b*cos(th(q));
% y(q) = y(q)+b*sin(th(q));
% x_egg_plot = a*cos(0:0.1:2*pi);
% y_egg_plot = b*exp(-alpha*(a*cos(0:0.1:2*pi))/2).*sin(0:0.1:2*pi);
% for qq = 1:length(x_egg_plot)
% tmp_egg = [cos(theta) -sin(theta);sin(theta) cos(theta)]*[x_egg_plot(qq) + trasl; y_egg_plot(qq)];
% x_egg_plot(qq) = tmp_egg(1);
% y_egg_plot(qq) = tmp_egg(2);
% end
% x_circ = zeros()
% Xvis = cell(1,1);
% Yvis = cell(1,1);
th = 0:0.1:2*pi;
p=0;
xcirc = zeros(length(th),1);
ycirc = zeros(length(th),1);
for r=0:0.05:Rmax
for j = 1:length(th)
xcirc(j) = x(q)+r*cos(th(j));
ycirc(j) = y(q)+r*sin(th(j));
if xcirc(j) >xlim(2)
xcirc(j)=xlim(2);
elseif xcirc(j) <= xlim(1)
xcirc(j) = xlim(1);
end
if ycirc(j) >ylim(2)
ycirc(j)=ylim(2);
elseif ycirc(j) <= ylim(1)
ycirc(j) = ylim(1);
end
% for w = 1:size(obsD,2)
% for w = 1:size(obsD,2)
% X(w)=xcirc(j)-obsD(:,w,1);
% Y(w)=ycirc(j)-obsD(:,w,2);
% end
vec = zeros(size(obsD,2),1);
% for w = 1:size(obsD,2)
% vec(w,1) = obsD(:,w,3)/2-((X(w)-obsD(:,w,3)/2)*cos(theta)-(Y(w)-obsD(:,w,3)/2)*sin(theta))^2/a^2-((X(w)-obsD(:,w,3)/2)*sin(theta)+(Y(w)-obsD(:,w,3)/2)*cos(theta))^2/b^2*exp(alpha*((X(1)-obsD(:,w,3)/2)*cos(theta)-(Y(w)-obsD(:,w,3)/2)*sin(theta)))<0;
% end
count = 0;
vec1 = zeros(length(x)-1,1);
for jj = 1:length(x)
if jj ~= q
count = count+1;
uvec = [x(q)-x(jj);y(q)-y(jj)]/norm([x(q)-x(jj);y(q)-y(jj)]);
m = (y(q)-y(jj))/(x(q)-x(jj));
mr = -1/m;
xm = .5*(x(q)+x(jj));
ym = .5*(y(q)+y(jj));
dm = norm([xm-x(q);ym-y(q)]);
if dm < 2*dA
% syms X Y
% vars = [X Y];
% eqs =[atan2(Y,X) == m, sqrt(X^2+Y^2) == 2*dA - dm];
% sol = solve(eqs,vars);
% if q ==3
% keyboard
% end
sol.X = xm + (2*dA-dm)*uvec(1);
sol.Y = ym + (2*dA-dm)*uvec(2);
if y(q) > -1/m*(x(q)-sol.X)+sol.Y
vec1(count,1) = ycirc(j) > -1/m*(xcirc(j)-sol.X)+sol.Y;
else
vec1(count,1) = ycirc(j) < -1/m*(xcirc(j)-sol.X)+sol.Y;
end
% vec1(count,1) = ycirc(j) > -1/m*(xcirc(j)-sol.X)+sol.Y;
% plot(xcirc(j),ycirc(j),'bd')
% 2*dA - (xcirc(j)-x(jj))^2 - (ycirc(j)-y(jj))^2 < 0;
else
vec1(count,1) = 1;
end
end
end
count = 0;
for w = 1:size(obsD,2)
count = count+1;
uvec = [x(q)-obsD(:,w,1);y(q)-obsD(:,w,2)]/norm([x(q)-obsD(:,w,1);y(q)-obsD(:,w,2)]);
m = (y(q)-obsD(:,w,2))/(x(q)-obsD(:,w,1));
mr = -1/m;
xm = .5*(x(q)+obsD(:,w,1));
ym = .5*(y(q)+obsD(:,w,2));
dm = norm([xm-x(q);ym-y(q)]);
if dm < dA+obsD(:,w,3)
% syms X Y
% vars = [X Y];
% eqs =[atan2(Y,X) == m, sqrt(X^2+Y^2) == 2*dA - dm];
% sol = solve(eqs,vars);
% if q ==3
% keyboard
% end
sol.X = xm + (dA+obsD(:,w,3)-dm)*uvec(1);
sol.Y = ym + (dA+obsD(:,w,3)-dm)*uvec(2);
if y(q) > -1/m*(x(q)-sol.X)+sol.Y
vec(count,1) = ycirc(j) > -1/m*(xcirc(j)-sol.X)+sol.Y;
else
vec(count,1) = ycirc(j) < -1/m*(xcirc(j)-sol.X)+sol.Y;
end
% vec1(count,1) = ycirc(j) > -1/m*(xcirc(j)-sol.X)+sol.Y;
% plot(xcirc(j),ycirc(j),'bd')
% 2*dA - (xcirc(j)-x(jj))^2 - (ycirc(j)-y(jj))^2 < 0;
else
vec(count,1) = 1;
end
end
coh = Rcoh - (xcirc(j)-mean(x))^2 - (ycirc(j)-mean(y))^2 > 0 ;
% coh = Rcoh - (xcirc(j)-mean(x))^2/(b*4) - (ycirc(j)-mean(y))^2/(12/b) > 0 ;
% if noCollision([x(q),y(q)]',[xcirc(j),ycirc(j)]',obs)==1 && vec(1) && vec(2)&& vec(3) && coh...
% && vec1(1) && vec1(2) && vec1(3) && vec1(4) %&& vec1(5) && vec1(6) && vec1(7) && vec1(8) && vec1(9)%...
%&& vec1(10) && vec1(11) && vec1(12) && vec1(13) && vec1(14) && vec1(15) && vec1(16) && vec1(17) && vec1(18) && vec1(19)
if noCollision([x(q),y(q)]',[xcirc(j),ycirc(j)]',obs)==1 && all(vec1) && all(vec) && coh
% if noCollision([x,y]',[xcirc(j),ycirc(j)]',obs)==1 && (rr - (X-0.5)^2-(Y-0.5)^2)<0
p=p+1;
Xvis(p) = xcirc(j);
Yvis(p) = ycirc(j);
end
end
end
end