How do I specify a hole with its coordinates ?

Hi,

How do i specify a hole in MATLAB ?

in other words, How do i make matlab realize a hole, from points in cloud ?

Example: Below is code for a slab with a hole. The coordinates of hole and corners of slab are specified. But the faces of hole are not being realized , when the code if executed.

vert=[0 0 0;10 0 0;10 20 0; 0 20 0; 5 5 0;7.5 5 0;7.5 10 0;5 10 0; 5 5 3;7.5 5 3;7.5 10 3;5 10 3; 0 0 3;10 0 3;10 20 3; 0 20 3];

GG=delaunayTriangulation(vert);

faceColor = [0.6875 0.8750 0.8984]; figure

tetramesh(GG,'FaceColor',faceColor,'FaceAlpha',0.3);

[FBtri,FBpoints] = freeBoundary(GG); size(FBtri) size(FBpoints)

Note: The actual answer has to be 32 faces instead of 28. The problem is the faces inside a hole is not taken into account here.