Touch Rez object, Setting rotation around parent prim.

Hello all. Here is my question and I'll try my best to explain.

Im trying to give a object that rezzes a local rotation around the object it was rezzed from. Make since? On touch it will rez a object. I want the object that rezzed to have a local rotation around the object it was rezzed from. Still a little more complicated. It must find its new rotation cus the object it rezzes from changes location and rotation.

Here is a visual reference example to help explain what I mean.

Lets say you have a car. The car you can touch and it will temp rez a prim that lets out a cloud of smoke from the engine.

Im basicly having trouble figuring out how to get the object that rezzes to appear at the engine location I set it to once the object is rotated. So lets say the car rotated 45 degrees and I tried to rez the object, the object will still rez at 0 rotation.

Any help is greatly apprecaited.

Use llGetRot() to get your parent prim rotation.
You will then need to apply this to the child.

    vector pos = llGetPos();
    rotation rot = llGetRot();
    // Add offsets
   // Rez object
   llRezObject("object", pos, <0,0,0>,rot, 0);

However if the child is rezed at a positional offset you will also need to calculate the rotational vector.

Not 100% sure you actually need to do this though, at least not for the example you have given. The child object could be a linked prim within the parent object so it would automatically rotate as the parent rotates. It woudl just be a case of triggering the required effect on touch.