Unreal Engine How to stop playing sound which is executed every frame? (BOOL) C++?

[TheNaitsyrk]

Hi,

 

I have made code which literally play sound once an actor (aka character) crosses certain X (position) in the game. However, once he goes past it, the sound is executed every frame.

 

Code needs to be in the tick section of pawn.

 

I know I need to use bool but how do I formulate it? Help would be much appreciated. Thanks!

[Technomancer__]

make it so the play command gets executed if he passes a certain point and if a variable is false. also make sure when the software runs that variable is false

when its executed once the sound plays and the variable goes to true. so now it cant play anymore cause its true

when it passes from somewhare else you can make it so the variable goes back to false so if you pass again it will play the sound

[Beesman]

I hope i understood you correctly that want to play a sound once the character enters an area but only when he enters and your problem is it starts playing each frame he is in there.

Well you can check if he is beyond the position each time but only set some play sound bool when the crossing happens.

If you want to play the sound only if he just crossed and is in the area, there are many ways to do that.

Simple example that crossed my mind is to control his being in the area for the last frame and the current one.

 

fe. pseudo code example:

bool isInArea51(Player player){...} //...function that returns if he is in - if it's just some x boundry probably just x => ??..
void playArea51ThemeSong(){...} //...function that plays the sound (probably in another threat 
bool wasInArea51 = false;
//...
//...
//The block where your stuff you do each frame happens or the tick of the pawn or w/e
{
  //...
	If( isInArea51(player) &&  !wasInArea51)//he is in but wasn't here last frame
	{
		playArea51ThemeSong();//probably in another threat dunno if unreals sound playing stuff handles this for you
	}
  //...
	wasInArea51 = isInArea51(player);
}

This will work for re-entering the area and will not loop if you stand directly on the threshold.

 

[TheNaitsyrk]

On 2017-5-22 at 7:28 PM, Beesman said:

I hope i understood you correctly that want to play a sound once the character enters an area but only when he enters and your problem is it starts playing each frame he is in there.

Well you can check if he is beyond the position each time but only set some play sound bool when the crossing happens.

If you want to play the sound only if he just crossed and is in the area, there are many ways to do that.

Simple example that crossed my mind is to control his being in the area for the last frame and the current one.

 

fe. pseudo code example:

bool isInArea51(Player player){...} //...function that returns if he is in - if it's just some x boundry probably just x => ??..
void playArea51ThemeSong(){...} //...function that plays the sound (probably in another threat 
bool wasInArea51 = false;
//...
//...
//The block where your stuff you do each frame happens or the tick of the pawn or w/e
{
  //...
	If( isInArea51(player) &&  !wasInArea51)//he is in but wasn't here last frame
	{
		playArea51ThemeSong();//probably in another threat dunno if unreals sound playing stuff handles this for you
	}
  //...
	wasInArea51 = isInArea51(player);
}

This will work for re-entering the area and will not loop if you stand directly on the threshold.

 

This helped, thank you!