Dicretization from countour nodes 2D.

Hello, I very much appreciate any help with the following problem.

I have some 2d data (x,y) that describes an airfoil, so I have the "countour" or edges of the 2d figure, and I want to get a discretization of the interior. I dont care if it is with quad or tria mesh, I just want get a set of points (nodes) wich are in the interior of the data.

Thanks

Answer 1

[José Daniel Hoyos Giraldo]

https://www.mathworks.com/matlabcentral/fileexchange/41454-grid-of-points-within-a-polygon

Answer 2

[KSSV]

Refer this:

https://in.mathworks.com/matlabcentral/fileexchange/40681-transfinite-interpolation

https://in.mathworks.com/matlabcentral/fileexchange/40618-grid-generation

[José Daniel Hoyos Giraldo]

Thanks, actually I already saw both links but i cant make it works. Grid generation seems to be a demostration when analytic expresion is known, in the other hand "transfinite interpolation" from the main TFI.m I just dont understand where put the x,y coordinates that I have.

Any suggest?

[KSSV]

TRansfinite interpolation uses either four side or two poosite sides....you need to proved the points instead of those sides. Undertsand the code, it is striaght forward to replace it with your data.

[José Daniel Hoyos Giraldo]

Hello, I tried changing

xi = linspace(0.,1,m) ;

eta = linspace(0.,1.,n) ;

for my points xi=x; eta=y;

but when it plot the grid, actually it is not my airfoil shape.

Thanks for help.

[José Daniel Hoyos Giraldo]

I got the solution with this file:

https://www.mathworks.com/matlabcentral/fileexchange/41454-grid-of-points-within-a-polygon

[KSSV]

You can use this package, the best you can do. https://in.mathworks.com/matlabcentral/fileexchange/25555-mesh2d-delaunay-based-unstructured-mesh-generation