Problem with Process List — I need neighbour values in the list during the iteration.

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@useful_design, you might have gotten your problem solved on another thread, but for anyone else with a similar question…

In this demo composition Getting the next item in a list in a process list cycle v 1.1.vuo I’m not getting the Process List node to cycle the list as I think it should.

To cycle the way you described, I would actually recommend using Take from List and Add List:

Cycle Letters - Take Add List.png
Cycle Letters - Take Add List.png2068×856 74 KB

But as a mental exercise, here is how you could do it with Build List:

Cycle Letters - Build List.jpg
Cycle Letters - Build List.jpg2636×1226 202 KB

All values except for X (r), which is a constant for all cars, are to be recalculated every frame.

You may want to take a look at @MartinusMagneson’s PetriDish.vuo on this thread.

Cycle Letters - Take Add List.vuo (2.27 KB)

Cycle Letters - Build List.vuo (5.27 KB)