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C++ Allegro Pausing The Game

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Started by lukeymoo August 15, 2011 02:20 AM

3 comments, last by lukeymoo 12 years, 8 months ago

lukeymoo

106

Author

August 15, 2011 02:20 AM

I've been searching all around, for the existence of a pause function in allegro, I have not been able to find one, and I'm left with the option of multi-threading, to test for a key input while drawing, and moving functions of allegro are disabled. I've even thought about going as far as something like this...



class foo

{

	public:

		bool paused;

		void init();

		bool test_paused();

		bool can_move;

};



void foo::init()

{

	paused = false;

	can_move = true;

}



void foo::test_paused()

{

	if(paused == true)

	{

		can_move = false;

	}

}

This code is really not in my program, it was just an example of what I was considering.
Any thoughts?

fastcall22

10,918

August 15, 2011 02:27 AM

Pausing the game isn't Allegro-specific.

Hint:
If you read up on finite state machines, you'll find the solution quite simple:



while running:

    process_events()

    update_game()

    render_game()



update_game:

    switch state:

        on play_state:  update_play_state()

        on pause_state: update_pause_state()

        on menu_state:  update_menu_state()



render_game:

    switch state:

        on play_state:  render_play_state()

        on pause_state: render_pause_state()

        on menu_state:  render_menu_state() 



update_play_state:

    if pause_key is pressed

        state = pause_state

        return

    if game_over

        state = menu_state

        return

    game_update()



update_pause_state:

    set_music_volume( 0.20 )

    if pause_key is pressed

        set_music_volume( 1 )

        state = play_state



render_play_state:

    game_render()



render_pause_state:

    game_render()

    render_pause_overlay()

lukeymoo

106

Author

August 15, 2011 02:27 AM

Dang, so this could possible get complicated with porting issues eh ?

fastcall22

10,918

August 15, 2011 03:19 AM

What? No, of course not. Multithreading would have been more complicated with porting issues.

lukeymoo

106

Author

August 15, 2011 03:31 AM

So the game would remain paused as long as the play is holding the button ?

But my game looks really, really similar in format to your pseudo code. It might not be as hard as I thought.

C++ Allegro Pausing The Game

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C++ Allegro Pausing The Game

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