Unityscript - Using "as" to cast for GetComponentsInChildren returns empty array

[TheMaster42]

I have an instantiated GameObject with multiple ParticleSystems on it (each on a GameObject that is a child of the main GameObject). To stop the entire thing from emitting further particles, I use this:

function StopEmission(theParticleObject : GameObject) {
   	var tempComponents : Component[];
	tempComponents = theParticleObject.GetComponentsInChildren(ParticleSystem);
	for (var particle : ParticleSystem in tempComponents) {
		particle.enableEmission = false;
	}
}

However this generates an “implicit downcast” warning. I understand I should be able to cast out the error as follows:

	var tempComponents : ParticleSystem[] = theParticleObject.GetComponentsInChildren(ParticleSystem) as ParticleSystem[];
	for (var particle : ParticleSystem in tempComponents) {
		particle.enableEmission = false;
	}

However, the for loop in this case never returns any results and I’m not sure why. I believe “as” will return null when the casting fails, but why shouldn’t this work?

EDIT: This doesn’t work either, harrumph:

	var tempComponents : Component[];
	tempComponents = theParticleObject.GetComponentsInChildren(ParticleSystem);
	for (var particle : ParticleSystem in tempComponents as ParticleSystem) {
		particle.enableEmission = false;
	}

[Eric5h5]

Use the generic version of GetComponentsInChildren; that way the array is automatically cast to ParticleSystem:

function StopEmission (theParticleObject : GameObject) {
    var tempComponents = theParticleObject.GetComponentsInChildren.<ParticleSystem>();
    for (var particle in tempComponents) {
       particle.enableEmission = false;
    }
}