75392e54c7
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@757 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
72 lines
1.2 KiB
Plaintext
72 lines
1.2 KiB
Plaintext
|
|
:- object(polygon,
|
|
instantiates(abstract_class),
|
|
specializes(object)).
|
|
|
|
|
|
:- info([
|
|
version is 1.1,
|
|
date is 2000/10/31,
|
|
author is 'Paulo Moura',
|
|
comment is 'Polygon predicates.']).
|
|
|
|
|
|
:- uses(list).
|
|
|
|
|
|
:- public(move/2).
|
|
:- mode(move(+integer, +integer), one).
|
|
|
|
:- public(number_of_sides/1).
|
|
:- mode(number_of_sides(?integer), zero_or_one).
|
|
|
|
:- private(position_/2).
|
|
:- dynamic(position_/2).
|
|
:- mode(position_(?integer, ?integer), zero_or_one).
|
|
|
|
:- public(position/2).
|
|
:- mode(position(?integer, ?integer), zero_or_one).
|
|
|
|
|
|
:- info([
|
|
version is 2,
|
|
date is 1998/2/23,
|
|
author is 'Paulo Moura',
|
|
comment is 'Default protocol for all polygons.']).
|
|
|
|
|
|
position(X, Y) :-
|
|
::position_(X, Y).
|
|
|
|
|
|
move(X, Y) :-
|
|
::retractall(position_(_, _)),
|
|
::assertz(position_(X, Y)).
|
|
|
|
|
|
trans_x(X) :-
|
|
::retractall(position_(_, Y)),
|
|
::assertz(position_(X, Y)).
|
|
|
|
|
|
trans_y(Y) :-
|
|
::retractall(position_(X, _)),
|
|
::assertz(position_(X, Y)).
|
|
|
|
|
|
default_init_option(position-(0, 0)).
|
|
|
|
default_init_option(Default) :-
|
|
^^default_init_option(Default).
|
|
|
|
|
|
process_init_option(position-(X, Y)) :-
|
|
::move(X, Y).
|
|
|
|
process_init_option(Option) :-
|
|
^^process_init_option(Option).
|
|
|
|
|
|
:- end_object.
|
|
|