particle emitter relative to movement?

Adrenaline

I've been struggling with this for a little while.

I'm spawning particles to make a trail behind a circular actor. The actor is 20x20. With the goal of making it look like the particles are spawning behind the actor, I'd like to use the offset so they spawn at the visible edge of the actor.

The actor is always moving, interacting with other objects and bouncing around the scene. How can I set the emitter offsets (x and y) so it dynamically adjusts to the motion of the actor?

Thanks!

imjustmike

Use global attributes that are constrained to the actor's x and y, then use those global attributes in the particle spawner?

Or is the spawner in the actor itself?

Socks

Emitter Offset:

X = -10*cos( self.Rotation )
Y = -10*sin( self.Rotation )

Socks

Demo attached:

Adrenaline

Thanks for the demo @Socks but I tried that already. I see how it works in your demo but for my particular case, that isn't the solution.

Here's a stripped down version of my project here, maybe you could take a quick look?

https://drive.google.com/file/d/0B0HfU3-sgNs5UkQtbVdlZDFNVDA/view?usp=sharing

Thanks!

Socks

@Adrenaline said:
I see how it works in your demo but for my particular case, that isn't the solution.

Maybe try . . . .

-10*cos(vectorToAngle( self.Motion.Linear Velocity.X , self.Motion.Linear Velocity.Y ))
-10*sin(vectorToAngle( self.Motion.Linear Velocity.X , self.Motion.Linear Velocity.Y ))

?

Adrenaline

You're a beautiful person

Socks

@Adrenaline said:
You're a beautiful person

Thank you.

Adrenaline

@imjustmike said:
Use global attributes that are constrained to the actor's x and y, then use those global attributes in the particle spawner?

Or is the spawner in the actor itself?

Also thank you for that suggestion! The reason it didn't apply here was because I have, potentially, a lot of actors spawning these particles...so using attributes to store the location could get heavy and cumbersome.