how do i script a projectile which spawns randomly in game ?

[Mint92]

Heys guys, Im making a SideScroller game and i was hoping to find out how would i script a projectile which spawns randomly in game?

[AnxGotta]

What exactly do you mean by randomly. Could you create a trigger volume to trigger the spawning?

[evernewjoy]

To spawn a projectile and give it a direction (the speed of projectile comes from the actual projectile class)

I assume you use a projectile that is a subclass of the base Projectile.uc class

function spawnProj(vector startLocation, vector projDirection){
  
  local Projectile SpawnedProjectile;
  
  SpawnedProjectile = Spawn(class'ProjectileClass',,, startLocation);
  
  if( SpawnedProjectile != None && !SpawnedProjectile.bDeleteMe )
  {
	SpawnedProjectile.Init(projDirection);
  }
}

To give a projectile a RANDOM direction use vrand() for the projDirection



Rama

[evernewjoy]

if you want to spawn at random times,

use a timer

//run starttimer once from another func
//like postbeginplay()
//or startProjectileSpawning()
function starttimer(){
   float randomFloat;

   //initialize timer for random duration
   //of 0.1 to 10 seconds
   randomFloat = randRange(0.1, 10);
   SetTimer(randomFloat, false, 'spawnProj');
}

//use code from my post, but note you cannot pass parameters
//put all code inside the function itself.
function spawnProj(){
  
  local Projectile SpawnedProjectile;
  local vector startLocation;
  local vector projDirection;

  startLocation = //game specific, you will have to decide possible range of start locations
  projDirection = vrand(); //random direction, or use more game-specific code

  SpawnedProjectile = Spawn(class'ProjectileClass',,, startLocation);
  
  if( SpawnedProjectile != None && !SpawnedProjectile.bDeleteMe )
  {
	SpawnedProjectile.Init(projDirection);
  }

   //reset timer to a random duration
   starttimer();
}