koobas.hobune.stream
ParticleSystem.EmissionModule.rate is not a variable error
Working on updating my game after a hiatus, and the method I'm using to control a visual effect is now obsolete. Basically, I'm doing this on a particle system:
public override void UpdateEngines (float currentAccel) {
engineParticles.emission.rate = new ParticleSystem.MinMaxCurve(currentAccel * 200);
}
But it's complaining that ParticleSystem.EmissionModule is not a variable, so I can't assign a value to it. Yet the documentation here (http://docs.unity3d.com/ScriptReference/ParticleSystem-emission.html) shows that property being assigned a value.
What's the correct solution for this?
Okay, I found a working solution, but I don't understand /WHY/ I had to do this.
public override void UpdateEngines (float currentAccel) {
ParticleSystem.Emission$$anonymous$$odule em = engineParticles.emission;
em.rate = new ParticleSystem.$$anonymous$$in$$anonymous$$axCurve(currentAccel * 200);
}
Splitting the assignment into two lines fixes it. Why?!
It's all because Emission$$anonymous$$odule is a struct. In your case you modify a local copy of 'emission'. In a simple world you would probably want to assign a modified copy back to your particles. However, Unity implements emission's properties in a such way so it calls particle system internal methods. That's why it works.
