gnomo.sql.in

-- gnomonic projection and its inverse

CREATE OR REPLACE FUNCTION gnomonic_proj(spoint, spoint)
RETURNS point
AS 'MODULE_PATHNAME'
LANGUAGE C IMMUTABLE STRICT;

COMMENT ON FUNCTION gnomonic_proj(spoint, spoint) IS
'gnomonic projection, the second argument is the tangential point';

CREATE OR REPLACE FUNCTION gnomonic_inv(point, spoint)
RETURNS spoint
AS 'MODULE_PATHNAME'
LANGUAGE C IMMUTABLE STRICT;

COMMENT ON FUNCTION gnomonic_inv(point, spoint) IS
'inverse of gnomonic projection, the second argument is the tangential point';