latitude_radians_normalize()

double latitude_radians_normalize

(

double

lat

)

Convert a latitude to the range of -PI/2,PI/2.

Definition at line 78 of file lwgeodetic.c.

Referenced by geographic_point_init(), lwgeom_project_spheroid(), and point_deg2rad().

{

        if ( lat > 2.0 * M_PI )
                lat = remainder(lat, 2.0 * M_PI);

        if ( lat < -2.0 * M_PI )
                lat = remainder(lat, -2.0 * M_PI);

        if ( lat > M_PI )
                lat = M_PI - lat;

        if ( lat < -1.0 * M_PI )
                lat = -1.0 * M_PI - lat;

        if ( lat > M_PI_2 )
                lat = M_PI - lat;

        if ( lat < -1.0 * M_PI_2 )
                lat = -1.0 * M_PI - lat;

        return lat;
}

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