how to do something frequently ?

[justatest]

i hope to do a thing in every 2 sec . or some how .

but lua seem have no interrupt etc . i read some codes . but still not get the meaning .

screen.waitVblankStart(4) seem some like this . some one pls give me some more detail ?

[romero126]

screen.waitVblankStart(4) is a timer that halts all code for x ammount of time. Each numerical digit works in MS so if you wanted it to wait 2 seconds you would give it a timeout of 200(or 2000) depending on how long you wanted to wait. 200 I believe is 2 seconds.

[MikeHaggar]

Um... VBlanking happens 60 times a second me thinks (60FPS/60Hz or whatever), so screen.waitVblankStart(120) would be 2 seconds?

[KawaGeo]

Use system.sleep(x) function instead, x in milliseconds.

[romero126]

Waiting a specific time i always use a timer only because its far more relyable to do it that way vs halting everything going on.

[LordCthulu]

Hey romero can you give me a quick example of using a timer like that?
I tried using a timer for animation but I couldn't get it to work. Thanks in advance ^^;

[romero126]

for a limitation do.. if timer:start() > 30 then
pretty much.. it limites that timer to 30ms .. giving you a fps based animation or etc.. timer:reset() resets the timer.. the rest of the information can be found on the wiki

[LordCthulu]

Ok I was checking for something other than timer:start(), probably why. Thanks ^^;