normalize()

void normalize

(

POINT3D *

p

)

Normalize to a unit vector.

Definition at line 615 of file lwgeodetic.c.

{
        double d = sqrt(p->x*p->x + p->y*p->y + p->z*p->z);
        if (FP_IS_ZERO(d))
        {
                p->x = p->y = p->z = 0.0;
                return;
        }
        p->x = p->x / d;
        p->y = p->y / d;
        p->z = p->z / d;
        return;
}

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_get_sortable_hash(), gbox_pt_outside(), lwpoly_pt_outside_hack(), point_in_cone(), ptarray_segmentize_sphere_edge_recursive(), sphere_angle(), test_vector_angle(), unit_normal(), vector_angle(), and vector_rotate().

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