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Tessero\Spatial\Delaunay

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__construct 
__construct(array $points)
barycentric 
barycentric(int $simplex, array $x): array

Barycentric coordinates of a point with respect to a given simplex (length ndim+1, summing to 1). Works for any dimension via the stored transform block.

findSimplex 
findSimplex(array $queryPoints, float $tol = 1.0E-12): array

For each query point, the index of the containing simplex (into ->simplices), or -1 when the point is outside the convex hull. Brute-force barycentric sign scan over the generalized (ndim+1) barycentric coordinates; a point is inside simplex s iff all coordinates are >= -tol.

tsearch static 
tsearch(Tessero\Spatial\Delaunay|array $tri, array $xi): array

scipy.spatial.tsearch(tri, xi): the simplex containing each query point, or -1 outside the hull. Identical to (new Delaunay($tri->points))->findSimplex($xi).