PostGIS  2.3.8dev-r@@SVN_REVISION@@

◆ normalize()

void normalize ( POINT3D p)

Normalize to a unit vector.

Definition at line 580 of file lwgeodetic.c.

References FP_IS_ZERO, POINT3D::x, POINT3D::y, and POINT3D::z.

Referenced by circ_center_cartesian(), circ_node_leaf_new(), clairaut_geographic(), edge_calculate_gbox_slow(), edge_distance_to_point(), edge_intersection(), edge_point_in_cone(), edge_point_side(), gbox_angular_height(), gbox_centroid(), gbox_pt_outside(), point_in_cone(), ptarray_segmentize_sphere_edge_recursive(), sphere_angle(), test_sphere_project(), test_vector_angle(), unit_normal(), vector_angle(), and vector_rotate().

581 {
582  double d = sqrt(p->x*p->x + p->y*p->y + p->z*p->z);
583  if (FP_IS_ZERO(d))
584  {
585  p->x = p->y = p->z = 0.0;
586  return;
587  }
588  p->x = p->x / d;
589  p->y = p->y / d;
590  p->z = p->z / d;
591  return;
592 }
double y
Definition: liblwgeom.h:339
double x
Definition: liblwgeom.h:339
#define FP_IS_ZERO(A)
double z
Definition: liblwgeom.h:339
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