1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146 | -----------------------------------------------------------------------
-- Ada Labs --
-- --
-- Copyright (C) 2008-2023, AdaCore --
-- --
-- This program is free software: you can redistribute it and/or --
-- modify it under the terms of the GNU General Public License as --
-- published by the Free Software Foundation, either version 3 of --
-- the License, or (at your option) any later version. --
-- --
-- This program is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the --
-- GNU General Public License for more details. --
-- --
-- You should have received a copy of the GNU General Public License --
-- along with this program. If not, see --
-- <https://www.gnu.org/licenses/>. --
-----------------------------------------------------------------------
with Ada.Real_Time; use Ada.Real_Time;
with Mage; use Mage;
with Mage.Draw; use Mage.Draw;
with Mage.Event; use Mage.Event;
with Solar_System; use Solar_System;
with Solar_System.Graphics; use Solar_System.Graphics;
procedure Subprogram_Contracts_Main is
-- declare variable Bodies which is an array of Body_T
Bodies : Bodies_Array_T;
-- declare a variable Next of type Time to store the Next step time
Next : Time;
-- declare a constant Period of 40 milliseconds of type Time_Span defining
-- the loop period
Period : constant Time_Span := Milliseconds (40);
-- reference to the application window
Window : Window_ID;
-- reference to the graphical canvas associated with the application window
Canvas : Canvas_ID;
begin
-- Create the main window
Window :=
Create_Window (Width => 240, Height => 320, Name => "Solar System");
-- retrieve the graphical canvas associated with the main window
Canvas := Get_Canvas (Window);
-- initialize Bodies using Init_Body procedure
--$ begin question
Init_Body
(B => Sun, Bodies => Bodies, Radius => 20.0, Color => Yellow,
--$ line question
Distance => 0.0, Angle => 0.0, Speed => 100.0, Turns_Around => Sun);
--$ end question
--$ begin answer
Init_Still_Body
(B => Sun, Bodies => Bodies, Radius => 20.0, Color => Yellow);
--$ end answer
--$ line question
Init_Body
--$ line answer
Init_Orbiting_Body
(B => Earth, Bodies => Bodies, Radius => 5.0, Color => Blue,
Distance => 50.0, Angle => 0.0, Speed => 0.02, Turns_Around => Sun);
--$ line question
Init_Body
--$ line answer
Init_Orbiting_Body
(B => Moon, Bodies => Bodies, Radius => 2.0, Color => White,
Distance => 15.0, Angle => 0.0, Speed => 0.04, Turns_Around => Earth);
--$ line question
Init_Body
--$ line answer
Init_Orbiting_Body
(B => Satellite, Bodies => Bodies, Radius => 1.0, Color => Red,
--$ line question
Distance => 8.0, Angle => 0.0, Speed => 0.0, Turns_Around => Earth);
--$ line answer
Distance => 8.0, Angle => 0.0, Speed => 0.1, Turns_Around => Earth);
--$ line question
Init_Body
--$ line answer
Init_Orbiting_Body
(B => Comet, Bodies => Bodies, Radius => 1.0, Color => Yellow,
Distance => 80.0, Angle => 0.0, Speed => 0.05, Turns_Around => Sun);
--$ begin question
Init_Body
(B => Black_Hole, Bodies => Bodies, Radius => 0.0,
Color => Blue, Distance => 75.0,
Angle => 0.0, Speed => -0.02, Turns_Around => Asteroid_2,
Visible => False);
--$ end question
--$ begin answer
Init_Invisible_Body
(B => Black_Hole, Bodies => Bodies, Distance => 75.0,
Angle => 0.0, Speed => -0.02, Turns_Around => Sun);
--$ end answer
--$ line question
Init_Body
--$ line answer
Init_Orbiting_Body
(B => Asteroid_1, Bodies => Bodies, Radius => 1.0, Color => Green,
Distance => 5.0, Angle => 0.0, Speed => 0.1, Turns_Around => Black_Hole);
--$ line question
Init_Body
--$ line answer
Init_Orbiting_Body
(B => Asteroid_2, Bodies => Bodies, Radius => 1.0, Color => Yellow,
Distance => 5.0, Angle => 3.14, Speed => 0.1,
Turns_Around => Asteroid_1);
-- check that there is no cycle in the orbits
pragma Assert (Solar_System.Init_With_No_Cycle (Bodies));
-- initialize the Next step time at the current time (Clock) + the period
Next := Clock + Period;
-- create an infinite loop
-- call Move_All procedure
-- call Draw_All procedure
-- call Swap_Buffers to update the screen
-- wait until Next time
-- update the Next time
while not Is_Killed loop
Move_All (Bodies);
Draw_All (Bodies, Canvas);
Handle_Events (Window);
delay until Next;
Next := Next + Period;
end loop;
end Subprogram_Contracts_Main;
|