How to make flare zoom?

[orkshaman]

I want to make flare effect for cars. Right now flare is plane object with texture and billboarding. Now I need that flare become smaller when it come closer to camera and larger if go from camera. I have only one idea - to set scale flares every frame, depending on its position.
Maybe JPCT have some feature for invert Zaxis zoom or to make it more easy for phone?
Sorry if I miss something in documentation.

[EgonOlsen]

Your idea is fine. There's no magic included that does this, you have to do this yourself.

[orkshaman]

Thank you, it work already. And not so slow as I thought.