spheroid_init()

void spheroid_init ( SPHEROID *  s, double  a, double  b  )

extern

Initialize a spheroid object for use in geodetic functions.

Initialize a spheroid object for use in geodetic functions.

Definition at line 39 of file lwspheroid.c.

{
        s->a = a;
        s->b = b;
        s->f = (a - b) / a;
        s->e_sq = (a*a - b*b)/(a*a);
        s->radius = (2.0 * a + b ) / 3.0;
}

References s.

Referenced by geometry_distance_spheroid(), lwgeom_area_sphere(), LWGEOM_distance_ellipsoid(), LWGEOM_distance_sphere(), test_gbox_utils(), test_geography_substring(), test_lwgeom_area_sphere(), test_lwgeom_distance_sphere(), test_spheroid_area(), test_spheroid_distance(), test_tree_circ_distance(), and test_tree_circ_distance_threshold().

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