def __init__(self, definition):
self._ctx = _lib.pj_ctx_alloc()
self._proj = _lib.pj_init_plus_ctx(self._ctx, definition.encode('ascii'))
errno = _lib.pj_ctx_get_errno(self._ctx)
if errno != 0:
raise RuntimeError(_lib.pj_strerrno(errno))
def transform(proj1, proj2, x, y, z=None, radians=False):
# Fixme: implement Numpy array
if _lib.pj_is_latlong(proj1._proj) and not radians:
x = math.radians(x)
y = math.radians(y)
x_ptr = _ffi.new('double []', [x])
y_ptr = _ffi.new('double []', [y])
z_ptr = _ffi.new('double []', [0])
count = 1
offset = 0
errno = _lib.pj_transform(proj1._proj, proj2._proj, count, offset, x_ptr, y_ptr, z_ptr)
if errno != 0:
raise RuntimeError(_lib.pj_strerrno(errno))
return x_ptr[0], y_ptr[0], z_ptr[0]