3D Coordinates to Mesh with Vertices and Faces

Hello. I have a set of 3D points in an multidimensional array (XYZ) which need to be converted into some kind of mesh (ideally with vertices and faces), which can then be converted into a binary volume.

What is the best way to go about this? Any suggestions or examples would be great, thanks.

[KSSV]

How your XYZ data is? Gridded or scattered? Solutions depends on that.

[Jason Bond]

Hello. My data can be divided into three X, Y, Z vectors. I can view this using Scatter3.

Answer 1

[KSSV]

That case you have to look into delaunay and griddata

% some random data
N=20;
x=rand(N,1) ;
y=rand(N,1) ;
z=rand(N,1) ;
tri=delaunay(x,y);
trisurf(tri,x,y,z);

[Jason Bond]

Thanks KSSV. I tried this, which works for my data to some extent but the result gives unnecessary connections between points that aren't needed (results pic is attached). The larger faces in the results pic aren't required. Is there any way around this? Thanks.

[KSSV]

I suggest you to use this package: https://in.mathworks.com/matlabcentral/fileexchange/25555-mesh2d-delaunay-based-unstructured-mesh-generation

[Pavel Onishchenko]

try this:

shp = alphaShape(points(:,1),points(:,2),points(:,3));

where points is Nx3 xyz matrix.

also you can get elements and nodes matrixes via

[elements,nodes] = boundaryFacets(shp);

Answer 2

[lokesh kumar]

i HAVE THE TRAINGULATED DATA, How to plot into surf