limit fps...

Time based movement isn''t that hard. Just think simple time based physics instead of pushing a move every time you update a frame. There is a great article here on gamedev (do a search in the resources) about how to impliment it quite simply. There is also an article on gametutorials.com. I suggest looking at both so you get a good idea what is going on. Also, people can see better than 30fps (you may be getting that number from the framrate of movies but movies play there frames blurred rather than clear like in rendered graphics so it tricks the eye into thinking its a more fluid motion)

Sure. Drop a "Sleep(33);" in your main loop. That''ll make your game run (if possible) at ~30 FPS.

But that''s lame.

Are you planning on just skipping over things that immediately appear "too hard" at first glance forever? If so, you won''t make it very far. And besides, time-based (i.e. framerate independent) motion isn''t hard at all.

1) Store the last tick in a long (initially set to GetTickCount())
2) Every frame, subtract the last tick from GetTickCount(). This is your "time delta" and is expressed in milliseconds (divide by 1000 to get seconds).
3) Assuming you''ve expressed your object velocities in units/sec, just multiply the time delta in seconds by these velocities and add them to their respective positions.
4) reset the last tick to GetTickCount().

Code:

int CurTick = 0, LastTick = GetTickCount();
float Delta;
  
while(1) // main loop
{
    CurTick = GetTickCount();
    Delta = (CurTick-LastTick)/1000.0f;
  
    MoveShip(Delta);
  
    LastTick = CurTick;
  
    //...
}
  
void MoveShip(float Time)
{
    ShipPos.x += ShipVel.x*Time;  // simple integration
    //...
}
 

Later,
ZE.

//email me.//zealouselixir software.//msdn.//n00biez.//
miscellaneous links

>>im making a first person shooter and i dont want to do time based movment because it seems kinda hard<<

its not hard

>>but i thought that it might be easier to just force the game to run at 30 fps<<

good idea, i do the movement/ai etc side all on a fixed fps IIRC ~40fps.
rendering though i run at the max the machine can handle

http://uk.geocities.com/sloppyturds/kea/kea.html
http://uk.geocities.com/sloppyturds/gotterdammerung.html

How do you manage that Zedzeek?
Do you use multi-threading or just setup your rendering
completely independent from your main game loop?

Thanks,

TommyB

http://www.flipcode.com/cgi-bin/msg.cgi?showThread=Tip-MainLoopTimeSteps&forum=totd&id=-1

http://uk.geocities.com/sloppyturds/kea/kea.html
http://uk.geocities.com/sloppyturds/gotterdammerung.html