I am creating a sequencer so that I can drag notes. I have it so when I drag the dummy array attached to a top-level template, pd adds the changing x and y values of the array to those of the top-level and zeroes those of the array. Using metro, the whole structure just moves around freely, which is perfect. The array is never touched, duration is set from the top-level structure.

My next step is to constrain possible values of Y. The possible values will be stored in a separate data structure as X values (each with an array of related info), so they can be sorted automatically. I want the Y value of the top-level template to reference the X values of the pitch collection as it changes, drawnumber some of the data stored in the arrays in the pitch collection, and finally be forced to the closest allowed value. I'm sure some odd combination of set, get, and metro will allow this forcing, but what I don't know is how to have Y recognize the closest allowed value from the separate data structure. I can't calculate the difference from every allowed pitch to Y with each movement of Y, my system would crash.

Maybe it could just start at Y's current value and search simultaneously up and down? Is there some Pd object for "closest member of x to n?"

Thanks. Chuckk