lwkmeans_pt_distance()

static double lwkmeans_pt_distance ( const Pointer  a, const Pointer  b  )

static

Definition at line 8 of file lwkmeans.c.

References POINT2D::x, and POINT2D::y.

Referenced by lwgeom_cluster_2d_kmeans(), and lwkmeans_pt_closest().

{
        POINT2D *pa = (POINT2D*)a;
        POINT2D *pb = (POINT2D*)b;

        double dx = (pa->x - pb->x);
        double dy = (pa->y - pb->y);

        return dx*dx + dy*dy;
}

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