MATLAB Examples

# Mesh generation of a square

## Initial data

Set the random number generator.

```rng(1); ```

Set the points defining the region to be meshed.

```d=-1:0.5:1; [x,y]=meshgrid(d,d); points=[x(:),y(:);zeros(1,2)]; ```

Perform random permutation to points to avoid infinite loops in convhull_nd.

```points=points+0.001*rand(size(points)); ```

## Processing

Find the Delaunay triangulation of the point set using the new convex hull algorithm.

```T1=delaunay_nd(points); ```

## Plots

Plot the mesh defined by the triangulation .

```figure('Name','Square 2D mesh','NumberTitle','off') patch('Faces',T1,'Vertices',points,... 'FaceColor',[1 0.5 0],'EdgeColor',[0 0 1]); xlabel('x','FontSize',13); ylabel('y','FontSize',13); zlabel('z','FontSize',13); title('Square 2D mesh','FontSize',13) ```

## Contact author

```(c) 2014 by George Papazafeiropoulos
First Lieutenant, Infrastructure Engineer, Hellenic Air Force
Civil Engineer, M.Sc., Ph.D. candidate, NTUA```

Website: http://users.ntua.gr/gpapazaf/