circ_node_min_distance()

static double circ_node_min_distance ( const CIRC_NODE *  n1, const CIRC_NODE *  n2  )

static

Definition at line 589 of file lwgeodetic_tree.c.

{
        double d = sphere_distance(&(n1->center), &(n2->center));
        double r1 = n1->radius;
        double r2 = n2->radius;
 
        if ( d < r1 + r2 )
                return 0.0;
 
        return d - r1 - r2;
}

References circ_node::center, circ_node::radius, and sphere_distance().

Referenced by circ_tree_distance_tree_internal().

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