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1 %% ------------------------------------------------- BOUNCE
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2
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3
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4 toy :- static([green, red, move, stop, start,quit]),
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5 *move:=1,*quit:=0,*stop:=0,*start:=1,*red:=0,*green:=1,
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6 bounce_init(W,R,G),@toy1(W,R,G).
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7
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8 toy1(W,R,G) :-
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9 [](event), % input
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10 s1, % automaton
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11 []((button_red(R),button_green(G),bounce(W))). % output
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12
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13 % ?- compile(['../tableau/gi.out']).
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14
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15 event :- nextevent(E),E=E1,event_select(E1).
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16 event_select(noevent) :- true.
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17 event_select(button(_,start)) :- *start := 1, *stop := 0.
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18 event_select(button(_,stop)) :- *stop := 1, *start := 0.
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19 event_select(button(_,quit)) :- *quit := 1.
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20
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21 button_red(Out) :-
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22 *red =0, Out => out("").
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23 button_red(Out) :-
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24 *red =1, Out => out("Red").
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25 button_green(Out) :-
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26 *green =0, Out => out("").
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27 button_green(Out) :-
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28 *green =1, Out => out("Green").
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29
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30 % size(400,400,10,fixed) :- true.
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31 size(200,200,5,'7x14') :- true.
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32
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33 bounce_init( [Window0, View0, Circ0, Xout0, X, Yout0,
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34 Y, Xd, Yd, Ydd, Xlim, Ylim],Xout0,Yout0) :-
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35 size(Hight,Width,R,Font),
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36 H0 = Hight-2, W0 = Width-2,
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37 H1 = Hight/2, W1 = Width/2,
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38 View <= view(Hight,Width),
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39 % View => setcolors(rgb(65000,0,0),white),
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40 Xout <= output("Red",font(Font)),
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41 Yout <= output("Green",font(Font)),
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42 Start <= button("Start",start,font(Font)),
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43 Stop <= button("Stop",stop,font(Font)),
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44 Quit <= button("Quit",quit,font(Font)),
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45 Box <= hbox([vbox([Xout,Yout,space,Start,Stop,Quit]),View]),
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46 Window <= window("Toy Program",Box),
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47 Window => open,
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48 View => rect(0,0,H0,W0),
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49 View => fillcircle(Circ,H1,W1,R),
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50 Window0<--Window, View0<--View, Circ0<--Circ,
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51 Xout0<--Xout, Yout0<--Yout,
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52 Ylim = Hight-10, Xlim = Width-10, Ydd = -R/2,
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53 #((@Ylim=Ylim,@Xlim=Xlim,@Ydd=Ydd)),
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54 @X = H1, @Y = W1, @Xd = R/2, @Yd = R*2.
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55 bounce([_, View, Obj, _Xout, X, _Yout, Y, Xd, Yd, Ydd, Xlim, _]) :-
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56 *move = 1,*quit = 0,
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57 X0 is integer(X), Y0 is integer(Y),
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58 View => moveto(Obj,X0,Y0),
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59 Y1 is Y+Yd,
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60 calc_xd(X, Xd, Xd1, Xlim),
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61 calc_yd(Y, Yd, Ydt, Y1, Yt1),
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62 @X = X+Xd,@Xd = Xd1, @Y = Yt1, @Yd = Ydt+Ydd.
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63 bounce([_, _, _, _, X, _, Y, Xd, Yd, _, _, _]) :-
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64 *move = 0,*quit = 0,
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65 @X = X,@Xd = Xd, @Y = Y, @Yd = Yd.
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66 bounce([W|_]) :-
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67 *quit = 1,
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68 W => close.
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69
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70 calc_xd(X, Xd, Xd1, _) :- X < 10, Xd1 is abs(Xd).
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71 calc_xd(X, Xd, Xd1, Xlim) :- X > Xlim, Xd1 is -abs(Xd).
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72 calc_xd(_, Xd, Xd, _):-true.
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73
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74 calc_yd(Y, Yd, Ydt, _, Y0) :-
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75 Y < 10, Yd > 0 , Ydt = Yd,Y0 = 10.
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76 calc_yd(Y, Yd, Ydt, _, Y0) :-
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77 Y < 10, Ydt = -Yd*0.9,Y0 = 10.
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78 calc_yd(_, Yd, Yd, Y1, Y1):-true.
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79
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