PostGIS  2.5.1dev-r@@SVN_REVISION@@

◆ circ_node_min_distance()

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

Definition at line 562 of file lwgeodetic_tree.c.

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

Referenced by circ_tree_distance_tree_internal().

563 {
564  double d = sphere_distance(&(n1->center), &(n2->center));
565  double r1 = n1->radius;
566  double r2 = n2->radius;
567 
568  if ( d < r1 + r2 )
569  return 0.0;
570 
571  return d - r1 - r2;
572 }
double sphere_distance(const GEOGRAPHIC_POINT *s, const GEOGRAPHIC_POINT *e)
Given two points on a unit sphere, calculate their distance apart in radians.
Definition: lwgeodetic.c:917
GEOGRAPHIC_POINT center
double radius
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