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227 | -----------------------------------------------------------------------
-- 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;
--$ line answer
with My_Solar_System; use My_Solar_System;
with Solar_System; use Solar_System;
with Solar_System.Graphics; use Solar_System.Graphics;
procedure Access_Types_Main is
--$ begin question
-- declare variable Bodies which is an array of Body_T
Bodies : Bodies_Array_T;
--$ end question
-- 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
Init_Body
--$ begin question
(B => Sun,
Bodies => Bodies,
--$ end question
--$ begin answer
(B => Get_Body (Sun, Bodies'Access),
--$ end answer
Radius => 20.0,
Color => Yellow,
Distance => 0.0,
Angle => 0.0,
Speed => 0.0,
--$ line question
Turns_Around => Sun);
--$ line answer
Turns_Around => Get_Body (Sun, Bodies'Access));
Init_Body
--$ begin question
(B => Earth,
Bodies => Bodies,
--$ end question
--$ begin answer
(B => Get_Body (Earth, Bodies'Access),
--$ end answer
Radius => 5.0,
Color => Blue,
Distance => 50.0,
Angle => 0.0,
Speed => 0.02,
--$ line question
Turns_Around => Sun);
--$ line answer
Turns_Around => Get_Body (Sun, Bodies'Access));
Init_Body
--$ begin question
(B => Moon,
Bodies => Bodies,
--$ end question
--$ begin answer
(B => Get_Body (Moon, Bodies'Access),
--$ end answer
Radius => 2.0,
Color => White,
Distance => 15.0,
Angle => 0.0,
Speed => 0.04,
--$ line question
Turns_Around => Earth);
--$ line answer
Turns_Around => Get_Body (Earth, Bodies'Access));
Init_Body
--$ begin question
(B => Satellite,
Bodies => Bodies,
--$ end question
--$ begin answer
(B => Get_Body (Satellite, Bodies'Access),
--$ end answer
Radius => 1.0,
Color => Red,
Distance => 8.0,
Angle => 0.0,
Speed => 0.1,
--$ line question
Turns_Around => Earth);
--$ line answer
Turns_Around => Get_Body (Earth, Bodies'Access));
Init_Body
--$ begin question
(B => Comet,
Bodies => Bodies,
--$ end question
--$ begin answer
(B => Get_Body (Comet, Bodies'Access),
--$ end answer
Radius => 1.0,
Color => Yellow,
Distance => 80.0,
Angle => 0.0,
Speed => 0.05,
--$ line question
Turns_Around => Sun);
--$ line answer
Turns_Around => Get_Body (Sun, Bodies'Access));
Init_Body
--$ begin question
(B => Black_Hole,
Bodies => Bodies,
--$ end question
--$ begin answer
(B => Get_Body (Black_Hole, Bodies'Access),
--$ end answer
Radius => 0.0,
Color => Blue,
Distance => 75.0,
Angle => 0.0,
Speed => -0.02,
--$ line question
Turns_Around => Sun,
--$ line answer
Turns_Around => Get_Body (Sun, Bodies'Access),
Visible => False);
Init_Body
--$ begin question
(B => Asteroid_1,
Bodies => Bodies,
--$ end question
--$ begin answer
(B => Get_Body (Asteroid_1, Bodies'Access),
--$ end answer
Radius => 1.0,
Color => Green,
Distance => 5.0,
Angle => 0.0,
Speed => 0.1,
--$ line question
Turns_Around => Black_Hole);
--$ line answer
Turns_Around => Get_Body (Black_Hole, Bodies'Access));
Init_Body
--$ begin question
(B => Asteroid_2,
Bodies => Bodies,
--$ end question
--$ begin answer
(B => Get_Body (Asteroid_2, Bodies'Access),
--$ end answer
Radius => 1.0,
Color => Yellow,
Distance => 5.0,
Angle => 3.14,
Speed => 0.1,
--$ line question
Turns_Around => Black_Hole);
--$ line answer
Turns_Around => Get_Body (Black_Hole, Bodies'Access));
-- initialize the Next step time at the current time (Clock) + 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
--$ line question
Move_All (Bodies);
--$ line answer
Move_All (Bodies'Access);
Draw_All (Bodies, Canvas);
Handle_Events (Window);
delay until Next;
Next := Next + Period;
end loop;
end Access_Types_Main;
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