Implementation of Wait

Post reply

❤Follow Topic(4)

0 favourites

6 posts

- Fib
- - Joined 19 Jan, 2012
  - 18 topics • 188 posts
- 1
- 8 May, 2022
- Quote
Just curious how the Wait system action is implemented. I want to do something similar in a C game engine cause it's so useful. Does it use the browser API setTimeout? ES6 coroutines? Or is it implemented in some other way.
- R0J0hound
- - Joined 15 Jun, 2009
  - 90 topics • 7,087 posts
- 1
- 8 May, 2022
- Quote
It probably works like this, at least that’s how I rely on it working.

Update loop

— run event sheet

— run wait events that are done
Try Construct 3

Develop games in your browser. Powerful, performant & highly capable.
Try Now Construct 3 users don't see these ads
- winkr7
- - Joined 23 Oct, 2014
  - 86 topics • 555 posts
- 1
- 8 May, 2022
- Quote
If I have a wait 0 after a wait 0 does it get run after the next tic runs the standard events, or does it get done after this tic's wait 0 stuff? I assume it is next tic.
- R0J0hound
- - Joined 15 Jun, 2009
  - 90 topics • 7,087 posts
- 2
- 8 May, 2022
- Quote
Not sure. We could test that with something like this:
Star of layout — set text to tickcount — wait 0 seconds — set text to self.text&tickcount — wait 0 seconds — set text to self.text&tickcount

Depending on how wait is implemented we could get 000 or 001.

Edit: I’m inclined to think it would be 000, aka all wait 0 after a wait will be run. The logic may be similar to the following. If I wanted it to delay to next frame it would be more complex I’d imagine. We could always look at the c2 source to see how wait is implemented too.

waitlist = [] time = 0 function wait(t){ waitlist.append({when:time+t, events:followingEvents}) } while(gameRunning){ time += dt runEvents() for(i=0; i<waitlist.length; ++i){ if(waitlist[i].when<=time){ run(waitlist[i].events) waitlist.remove(i) i-=1 } } }

R0J0hound
- Joined 15 Jun, 2009
- 90 topics • 7,087 posts
2

8 May, 2022
Quote

winkr7

Turns out you were right, it runs the next tick. Guess looping backwards over the list works to do that.

waitlist = []
time = 0

function wait(t){
 waitlist.append({when:time+t, events:followingEvents})
}

while(gameRunning){
 time += dt
 run(eventsheet)
 for(i=waitlist.length-1; i>0; --i){
 if(waitlist[i].when<=time){
 run(waitlist[i].events)
 waitlist.remove(i)
 }
 }
}