09/07/09 07:28:11
>>409
% Prolog
'3点が同一直線上にある'((X1,Y1),(X2,Y2),(X3,Y3)) :-
U is (X3-X1) * (Y2-Y1),
U is (X2-X1) * (Y3-Y1).
09/07/09 07:28:11
>>409
% Prolog
'3点が同一直線上にある'((X1,Y1),(X2,Y2),(X3,Y3)) :-
U is (X3-X1) * (Y2-Y1),
U is (X2-X1) * (Y3-Y1).
09/07/09 07:28:11
>>409
% Prolog
'3点が同一直線上にある'((X1,Y1),(X2,Y2),(X3,Y3)) :-
U is (X3-X1) * (Y2-Y1),
U is (X2-X1) * (Y3-Y1).