how to plot random points in airfoil wing

I want to plot random points on the airfoil wing of naca 4415. How can i approach this problem. I want these points in order to run an optimizations for locating points of a fixtures? please help

[KALYAN ACHARJYA]

@Rakesh Make your question be specific and clear, if require frame out the specific question with example.

[rakesh maled]

@kalyan

my question is i have an airfoil wing and i want to locate random points say like around 100 random points but with in the dimension of the airfoil. I want this points inorder to place locators , supporting units and clampers for a fixture.

[David Goodmanson]

hi rakesh,

are the points on the surface of the wing or inside the cross section?

[rakesh maled]

Hi David,

the points are on the surface of the wing.

Answer 1

[KSSV]

Check this demo example. I have coded it keeping in mind how your data is. It is like you are provided with upper and lower curve of foil.

[X,Y,Z] = cylinder(1)  ;

n = size(X,2) ; 
m = 10 ; 
t = linspace(0,1,m) ; 
L = zeros(3,m,n) ; 
% Draw line between points 
for i = 1:n
    P1 = [X(1,i) Y(1,i) Z(1,i)]' ; 
    P2 = [X(2,i) Y(2,i) Z(2,i)]' ; 
    L(:,:,i) = P1+(P2-P1).*t ; 
end

XX = squeeze(L(1,:,:)) ; 
YY = squeeze(L(2,:,:)) ; 
ZZ = squeeze(L(3,:,:)) ; 


% Select random p points 
p = 100 ; 
idx = randperm(numel(XX),p) ; 
% display 
surf(X,Y,Z)
hold on
plot3(XX(idx),YY(idx),ZZ(idx),'.r')

[rakesh maled]

Thanks KSSV,

will surely try the code given by you.