What exactly do you mean by that?
Transformations in setup() worked fine for me...
Could you show an example of the code that isn't working or what you have tried?

"Transformations in setup() worked fine for me..."
Indeed, when drawing is done there.
Something often overlooked is that at the start of each draw(), all transformations are reseted.

I would put all global vars before setup() and before they are used. 

Thank you. So I see that when you want to program movement with a transformation at the beginning, there is no way to do that. You are mean to use the coordenates as they are defined by processing.

No, you just apply the same transformation at the start of draw(): it will do the transformation on each frame.

I've tried that but the number of times you can do a transformation is limited

? See my other answer above... (about resetting transformations when starting draw()).

Maybe I had problems with that because the transformation were not the same. To be honest now I dont remember well what was exatcly the case. I've solved the problem with this sketch, and now I have a bit of a mess with this question. I´ll re-read this post when I make a similar sketch and make myself clear. Thank you

Now I remember. I had problems with transformations made within the draw fuction, but inside a nother function that was call recursively. I was trying to make Barnsney fern this way, and I couldn´t.