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# scipy.spatial.Delaunay.find_simplex

`Delaunay.``find_simplex`(self, xi, bruteforce=False, tol=None)

  Find the simplices containing the given points.

  Parameters: | tri : DelaunayInfo Delaunay triangulation xi : ndarray of double, shape (..., ndim) Points to locate bruteforce : bool, optional Whether to only perform a brute-force search tol : float, optional Tolerance allowed in the inside-triangle check. Default is `100*eps`.
  Returns: | i : ndarray of int, same shape as xi Indices of simplices containing each point. Points outside the triangulation get the value -1.

  Notes

  This uses an algorithm adapted from Qhull’s `qh_findbestfacet`, which makes use of the connection between a convex hull and a Delaunay triangulation. After finding the simplex closest to the point in N+1 dimensions, the algorithm falls back to directed search in N dimensions.