attract particles

Questions & Answers
1

Can someone translate the following piece of code into Javascript please?
I realise that parts of it is already in Javascript. The only lines that my version of the Unity3D has problems with are the following:

  particles_.position = Vector3.Lerp(particles*.position; transform.position; Time.deltaTime / 2.0f); //On Line 14*_

&
for (var i:int = 0; i < particles.GetUpperBound(0)){ //On Line 12
Here’s all of the script together:



var p:ParticleEmitter;

var particles:Particle[];

function Start() {

p = (ParticleEmitter)(GameObject.Find(“Magical Fire Smoke”).GetComponent(typeof(ParticleEmitter)));

particles = p.particles;

}

function Update() {

for (var i:int = 0; i < particles.GetUpperBound(0))

{

particles_.position = Vector3.Lerp(particles*.position; transform.position; Time.deltaTime / 2.0f);

}

p.particles = particles;

}

This piece of code was taken from:
http://answers.unity3d.com/questions/61821/create-a-particle-system-that-puffs-out-particles.html*_
_&
*http://answers.unity3d.com/questions/64932/creative-way-to-attract-particles.html*_

2

Get rid of the semicolons inside the vector3 of this line and see if that helps → 

   particles_.position = Vector3.Lerp(particles*.position; transform.position; Time.deltaTime / 2.0f); //On Line 14*_

change it to →
particles_.position = Vector3.Lerp(particles*.position, transform.position, Time.deltaTime / 2.0f) ;*_

3

I’ve changed what you recommended and it is still coming up with two errors. Here’s the updated script:

var p:ParticleEmitter;

var particles:Particle;

function Start() {

p = (ParticleEmitter)(GameObject.Find("Magical Fire Smoke").GetComponent(typeof(ParticleEmitter)));

particles = p.particles;

}

function Update() {

var i = 0;

for (i = 0; i < particles.GetUpperBound(0))

{

    particles_.position = Vector3.Lerp(particles*.position; transform.position; Time.deltaTime / 2.0f);*_

}
p.particles = particles;
}
The lines that it is highlighting are:
for (i = 0; i < particles.GetUpperBound(0)) //Line 12
The error message for this is:
BCE0044: expecting ;, found ‘)’
The lines that it is highlighting are:
particles_.position = Vector3.Lerp(particles*.position; transform.position; Time.deltaTime / 2.0f);//Line 14*
The error message for this is:
BCE0044: expecting :, found ‘=’._

4

Ok, here's the whole script from the 2nd link you posted up there, converted to javascript. 

#pragma strict
 
public var p : ParticleEmitter ;
public var particles : Particle[] ;
public var affectDistance : float ;
var sqrDist : float ;
var thisTransform : Transform ;
 
function Start(){
   thisTransform = transform ;
   p = GameObject.Find("StrangeParticles").GetComponent(ParticleEmitter) ;
   particles = p.particles ;
   sqrDist = affectDistance * affectDistance ;
}
 
function Update(){
   var dist : float ;
    
   for(var i=0 ; i < particles.GetUpperBound(0) ; i++){
   dist = Vector3.SqrMagnitude(thisTransform.position - particles*.position) ;*
 *if(dist < sqrDist){*
 <em>particles_.position = Vector3.Lerp(particles*.position, thisTransform.position, Time.deltaTime / 2) ;*_</em>
 <em>_*}*_</em>
 <em>_*}*_</em>
<em>_*p.particles = particles ;*_</em>
<em>_*}*_</em>
<em>_*```*_</em>
<em>_*<p>I'm new to C# also, haven't even bothered reading any of it until the passed week of being on this site, hopefully the conversion is right and it works for you.</p>*_</em>