Re: Parenting & Linkage to create a moving Train

It might be best for you to use valueAtTime() for the cars that follow. You can put layers in numerical order and use the index of the previous layer to link through valueAtTime().

Have the Engine layer Align to Path.

You would need to adjust the (time - #) to get the right offset. This can be done easily across all the layers with an Expression Slider.

LAYER 2 Position Expression: thisComp.layer(index - 1).position.valueAtTime(time - 1)

Then duplicate Layer 2 for the number of cars you need and replace them if you need to.

Trent Armstrong - Creative Cow Leader
http://www.dallasaeug.com