seems to me that the problem is not just the perimeter, but the middle as
well. i have been debugging the program after changing the type definition of
structure 'delaunay' to hild the indeces into the array 'original points' to
see if all the points are represented in the permutations, and sometimes thay
are (when it is ok) and sometimes they are not (when it has holes in) . so
the problem is that the program does generate all permutations but does not
guarantee that all points eventually end up in the stored array of
triangles.i guess that we need not just one loop, but possibly a series of
passes, but how to do it?

p