e written as an affine coordinate as (x/(z^2), y/(z^3)). Conversion to Jacobian projective from affine coordinates is simple. The coordinate (x, y) is mapped to (x, y, 1). Although deprecated in OpenSSL 3.0 and should no longer be used, to set or get the projective coordinates in older versions use EC_POINT_set_Jprojective_coordinates_GFp() and EC_POINT_get_Jprojective_coordinates_GFp() respectively. Modern versions should instead use EC_POINT_set_affine_coordinates() and EC_POINT_get_affine_coordinates(), 