Why doesn't my code seem to change particle color?

Questions & Answers
1

Hi, im trying to change the color of the particles but it doesnt seems to work... Please, can you help me and tell me what im doing wrong?? . This is the script that i attached to my particle system:

ParticleAnimator particleAnimator = (ParticleAnimator)GetComponent("PS");
Color[] modifiedColors = particleAnimator.colorAnimation;
modifiedColors[0] = Color.red;
modifiedColors[1] = Color.blue;
modifiedColors[2] = Color.red;
modifiedColors[3] = Color.blue;
modifiedColors[4] = Color.red;
particleAnimator.colorAnimation = modifiedColors;

PS is de name of the particle system. Thanks!!

2 
// The faulty code:
ParticleAnimator particleAnimator = (ParticleAnimator)GetComponent("PS");

In your code, you're trying to get a component using Component.GetComponent that is of the type "PS". This is an error. You must supply the component type, not the gameobject name.

This will result in either:

  • Null reference exception when you try to use it (since there was no component of type PS found).
  • Invalid cast exception (if PS is a type that exist and is placed on the game object).

Try this code instead (I use the generic overload since it seems we're dealing with C#):

var particleAnimator = GetComponent<ParticleAnimator>();

// Same as:
// var particleAnimator = (ParticleAnimator)GetComponent("ParticleAnimator");
// But alot cleaner imo.

If your particle animator is not on the same object as your script (the "PS" object, I reckon), then you can find it using GameObject.Find and access it using GameObject.GetComponent like such:

var ps = GameObject.Find("PS");
var particleAnimator = ps.GetComponent<ParticleAnimator>();
  • Note I used var keyword to shorten my post and make it more readable. This is not required.