with
     gel.Forge,
     gel.Window.setup,
     gel.Applet.gui_world,
     gel.World,
     gel.Camera,
     gel.Sprite,

     ada.Calendar;

pragma Unreferenced (gel.Window.setup);


procedure launch_add_rid_sprite_Test
--
-- drops a ball onto a box terrain.
--
--
is
   use ada.Calendar;

   the_Applet : constant gel.Applet.gui_world.view
     := gel.forge.new_gui_Applet ("Add/Rid Sprite Test", 500, 500);

   the_Box : constant gel.Sprite.view
     := gel.forge.new_box_Sprite (the_Applet.gui_World, mass => 0.0);

   the_Balls : gel.Sprite.views (1 .. 1)
     := (others => gel.forge.new_ball_Sprite (the_Applet.gui_World, mass => 1.0));

   next_render_Time : ada.calendar.Time;

begin
   the_Applet.gui_Camera.Site_is ((0.0, 5.0, 15.0));     -- Position the camera
   the_Applet.enable_simple_Dolly (1);                   -- Enable user camera control via keyboards
   the_Applet.enable_Mouse (detect_Motion => False);     -- Enable mouse events.


   the_Applet.gui_World.add (the_Box);                   -- Add the ground box.
   the_Box.Site_is ((0.0,  0.0,  0.0));


   for Each in the_Balls'range
   loop
      the_Applet.gui_World.add (the_Balls (Each));       -- Add ball.
      the_Balls (Each).Site_is ((0.0,  10.0,  0.0));
   end loop;

   for Each in 1 .. 100
   loop
      the_Applet.gui_World.evolve;                       -- Evolve the world.
      the_Applet.freshen;                                -- Handle any new events and update the screen.
   end loop;

   for Each in the_Balls'range
   loop
      the_Applet.gui_World.rid (the_Balls (Each));        -- Rid ball.
      gel.Sprite.free (the_Balls (Each));
   end loop;



   next_render_Time := ada.Calendar.clock;

   while the_Applet.is_open
   loop
      the_Applet.gui_World.evolve;                        -- Evolve the world.
      the_Applet.freshen;                                 -- Handle any new events and update the screen.

      next_render_Time := next_render_Time + gel.World.evolve_Period;
      delay until next_render_Time;
   end loop;


   the_Applet.destroy;

end launch_add_rid_sprite_Test;