Thank you for these first informations !
I must do it step by step I see
:

1. Get group entity
2. Insert instance
3. Apply transformation
4. ??

This picture show that I have first : (Two lines => the path, and a shape (group) to copy on the path)

And here the result :

Hi all,
I am new in ruby for sketchup, I do it as hobby...
I am trying to understand how to use location, and shape distribution with ruby.
And to do this, my test is to place one rectangular shape between two lines and paste it until the end of sinusoidal lines with regular intervals.

Can you help me about this? Just to know which function I must to use, how to select my rectangular shape, and give it the destinations' lines to be paste and distribute?

Thanks by advance !

Nckb

PS : I hope that I use correct english to explain you my problem
PPS : If you want pictures, I can upload it...