PortaLib world update callback et al.
Hi there!
this is a question to everyone, but i'd really appreciate
Brett's answer (caus he is father of PL3D, after all .
Here it is: if I, say, would want to write a demo, where my
camera would rotate around a group of objects, i, obviously
would need to update camera position from time to time and render
the world according to the new position.
Okay, i can do it in the drawScene function, but here's the trouble - if your PC can do 70 FPS your camera would rotate fast,
if your PC is slow and does only 15 FPS, your camera would move quite slowly.
Obviously, we need a way to have our updateWorld (or something like this) function to be called at a certain rate. At present time we have only one user-definable callback (drawScene).
So, how do we solve it?
Is it going to be solved in the upcoming (and looked forward to, at least by me) PL3D v0.2.0 ?
Any suggestions ?
Thanx.
Dr. KiRR
--------
Dr. KiRR's stuff is at
http://www.geocities.com/drkirr
Edited by - DrKiRR on June 12, 2001 5:32:48 AM
Been a bit slow on the new release - many apologies
A lot to do and so little time.
I think what you want is a timer...
Timer *pTimer = Timer::getNewTimer();
in your constructor
int lastUpdate = 0;
drawScene()
{
long time = pTimer->getTime();
if ( time - lastUpdate > 1000 )
{
update();
lastUpdate = time;
}
}
Updates once a second.
HTH!
~~~
Cheers!
Brett Porter
PortaLib3D : A portable 3D game/demo libary for OpenGL
A lot to do and so little time.
I think what you want is a timer...
Timer *pTimer = Timer::getNewTimer();
in your constructor
int lastUpdate = 0;
drawScene()
{
long time = pTimer->getTime();
if ( time - lastUpdate > 1000 )
{
update();
lastUpdate = time;
}
}
Updates once a second.
HTH!
~~~
Cheers!
Brett Porter
PortaLib3D : A portable 3D game/demo libary for OpenGL
Yes, that''s something like i had in mind...
Actually, i asked cause i thought someone could come up
with something better (it''s not that this system is bad,
i just see several potential problems here).
BTW, by the time you answered, i have already implemented
something like it (sorry, Brett, i should have said that before) - i''m currently working on a simple mm.. "demo"
called "Day & Night".
Soon to be released...
Actually, i asked cause i thought someone could come up
with something better (it''s not that this system is bad,
i just see several potential problems here).
BTW, by the time you answered, i have already implemented
something like it (sorry, Brett, i should have said that before) - i''m currently working on a simple mm.. "demo"
called "Day & Night".
Soon to be released...
This topic is closed to new replies.
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