#64205 - dexter0 - Tue Dec 20, 2005 6:08 am
Is there anyway to have my code call a function and while that function is running, call another function and have them both run at the same time?
#64207 - tepples - Tue Dec 20, 2005 6:16 am
What, specifically, do the two functions do?
Do you mean coroutines, where two functions run, passing data back and forth?
_________________
-- Where is he?
-- Who?
-- You know, the human.
-- I think he moved to Tilwick.
#64208 - dexter0 - Tue Dec 20, 2005 6:22 am
The two functions are controlling two different sprites on the screen. Each function controls one of the two sprites.
#64211 - poslundc - Tue Dec 20, 2005 6:47 am
Why would they have to run at the same time?
Dan.
#64229 - Fatnickc - Tue Dec 20, 2005 12:43 pm
You can have the effect that they are running at the same time quite easily.
Simply replace all whiles with ifs and the like, then use this:
| Code: |
while(a<b)
{
function1();
function2();
} |
#64264 - sajiimori - Tue Dec 20, 2005 7:19 pm
I use coroutines extensively, allocating a stack for each of them. That's a pretty high price to pay in terms of memory, but I can always "bake" them into finite state machines if it's getting too expensive.
Edit: Then again, it was probably more of a beginner question, which would make coroutines a little out of the ballpark...
#64307 - tepples - Wed Dec 21, 2005 5:14 am
In that case, Fatnickc's answer is the right one.
Imagine each game object taking a turn. Each turn it stays still or moves a pixel or two. Then imagine the turns going so fast that each sprite gets a turn 60 times a second. All objects move a bit, and then the program draws them in their new positions, rinse and repeat until Game Over. This is what a typical game loop looks like.
| Code: |
while(game_state != STATE_GAMEOVER)
{
move_player();
move_player_out_of_walls();
move_enemies();
move_enemies_out_of_walls();
move_projectiles();
game_state = handle_object_collisions();
draw_all_objects();
VBlankIntrWait();
} |
_________________
-- Where is he?
-- Who?
-- You know, the human.
-- I think he moved to Tilwick.
#68488 - dusda - Wed Jan 25, 2006 12:08 am
| tepples wrote: |
In that case, Fatnickc's answer is the right one.
Imagine each game object taking a turn. Each turn it stays still or moves a pixel or two. Then imagine the turns going so fast that each sprite gets a turn 60 times a second. All objects move a bit, and then the program draws them in their new positions, rinse and repeat until Game Over. This is what a typical game loop looks like.
| Code: | while(game_state != STATE_GAMEOVER)
{
move_player();
move_player_out_of_walls();
move_enemies();
move_enemies_out_of_walls();
move_projectiles();
game_state = handle_object_collisions();
draw_all_objects();
VBlankIntrWait();
} |
|
That is a very good explanation of how games work :D.