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175 | -----------------------------------------------------------------------
-- 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 Tasking_Protected_Objects_Main is
--$ begin question
-- declare variable Bodies which is an array of Body_T
Bodies : Bodies_Array_T;
--$ end question
-- declare a variable Now of type Time to record current time
Now : 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
(B => Sun,
--$ line question
Bodies => Bodies,
Radius => 20.0,
Color => Yellow,
Distance => 0.0,
Angle => 0.0,
Speed => 0.0,
Turns_Around => Sun);
Init_Body
(B => Earth,
--$ line question
Bodies => Bodies,
Radius => 5.0,
Color => Blue,
Distance => 50.0,
Angle => 0.0,
Speed => 0.02,
Turns_Around => Sun);
Init_Body
(B => Moon,
--$ line question
Bodies => Bodies,
Radius => 2.0,
Color => Blue,
Distance => 15.0,
Angle => 0.0,
Speed => 0.04,
Turns_Around => Earth);
Init_Body
(B => Satellite,
--$ line question
Bodies => Bodies,
Radius => 1.0,
Color => Red,
Distance => 8.0,
Angle => 0.0,
Speed => 0.1,
Turns_Around => Earth);
Init_Body
(B => Comet,
--$ line question
Bodies => Bodies,
Radius => 1.0,
Color => Yellow,
Distance => 80.0,
Angle => 0.0,
Speed => 0.05,
Turns_Around => Sun);
Init_Body
(B => Black_Hole,
--$ line question
Bodies => Bodies,
Radius => 0.0,
Color => Blue,
Distance => 75.0,
Angle => 0.0,
Speed => -0.02,
Turns_Around => Sun,
Visible => False);
Init_Body
(B => Asteroid_1,
--$ line question
Bodies => Bodies,
Radius => 1.0,
Color => Green,
Distance => 5.0,
Angle => 0.0,
Speed => 0.1,
--$ line answer
Tail => True,
Turns_Around => Black_Hole);
Init_Body
(B => Asteroid_2,
--$ line question
Bodies => Bodies,
Radius => 1.0,
Color => Blue,
Distance => 5.0,
Angle => 3.14,
Speed => 0.1,
--$ line answer
Tail => True,
Turns_Around => Black_Hole);
-- create an infinite loop
-- update the Now time with current clock
-- call Move_All procedure
-- wait until Now + Period time elapsed before the next
Now := Clock;
while not Is_Killed loop
--$ begin question
Move_All (Bodies);
Draw_All (Bodies, Canvas);
--$ end question
--$ line answer
Draw_All (Canvas);
Handle_Events (Window);
delay until Now + Period;
Now := Now + Period;
end loop;
--$ begin answer
Terminate_Tasks;
--$ end answer
end Tasking_Protected_Objects_Main;
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