Determining Emitter Direction

[Firov]

If I'm trying to determine the direction of an emitter, for the purpose of applying a force relative to it's y axis, is there any way to do that?

I've tried every way I can think to determine the y axis of the emitter, but the only thing that seems to work is "this.rigidbody.AddRelativeForce(0,-particleEmitter.localVelocity.y,0 * appliedForce * 1)"

Honestly, that works pretty well, but I'm told that it's also "wrong". So, with that knowledge in hand I tried various other possibilities, like particleEmitter.localRotationAxis.y or particleEmitter.transform.rotation.y. None of those produce results.

I'd really appreciate some help in getting to the bottom of this. I'm running out of noodles to throw against the wall.

[xEvilReeperx]

Its local y axis in worldspace? According to the unity docs your way seems fine, although localVelocity has the qualifier "starting velocity". I would think rigidbody.transform.up or rigidbody.transform.rotation * Vector3.up would also give you correct results

[Firov]

Its local y axis in worldspace? According to the unity docs your way seems fine, although localVelocity has the qualifier "starting velocity". I would think rigidbody.transform.up or rigidbody.transform.rotation * Vector3.up would also give you correct results

Hmm. Thanks for the tip. I gave it a shot but in this case unfortunately it resulted in a "[Exception]: NullReferenceException: Object reference not set to an instance of an object" error message.

I tried using both of the below, and both generated that same error.

this.rigidbody.AddRelativeForce(particleEffect.rigidbody.transform.rotation * Vector3.up * appliedForce * 1);

this.rigidbody.AddRelativeForce(valveEffect.rigidbody.transform.up * appliedForce * 1);

Something so simple as getting the vector direction of an emitter is surprisingly difficult. I'm still amazed that "particleEmitter.localRotationAxis" doesn't do anything.

[xEvilReeperx]

Hmm. Thanks for the tip. I gave it a shot but in this case unfortunately it resulted in a "[Exception]: NullReferenceException: Object reference not set to an instance of an object" error message.

It's probable that whatever particleEffect and valveEffect are, they don't have rigid bodies attached to them. Just use their transforms instead