poly_triangulate computes a delaunay triangulation.
rmTriangles is a matrix with three columns. Each row contains the indices of a triangle. In case of an error rmTriangles is a string vector with two elements. The first element is an error code, the second element is the error text.
x is a vector with x coordinates.
y is a vector with y coordinates.
This function uses the qhull Algorithm, see:
Barber, C.B., Dobkin, D.P., and Huhdanpaa, H.T., “The Quickhull algorithm for convex hulls,” ACM Trans. on Mathematical Software, Dec 1996. http://qhull.org.
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