Hi,

If I've understood what you want correctly then first you need to add a global variable to receive the output of your pan control, the variable name must match the control name for this to work automatically, if it doesn't you'll need to write a callback for the knob control. Add this at e.g. line 27:

1. float pan;

Then you need to use that variable when drawing the ellipse.  Change line 98 to:

1. ellipse(pan, y, 50, 50);

That "just worked" without any further changes for me but you'll need to be careful if you change the pan control range or anything like that.

Cheers,
Jonny

Hi,

Ok, to set the pan position you need to create a callback to receive values from the pan knob.  To do this add the following function somewhere:

1. void pan(int value) {
2.   p.setPos((float(value) / 400.0) - 1.0);
3.   panPos = value;
4. }

That function sets the pan position on line 2.  The division by 400.0 and subtraction of 1.0 is necessary to map the output of the pan knob (0 -> 800) into the range expected by the panner ugen (-1.0 -> 1.0).  Line 3 of the function writes the unmapped value to a global variable called panPos which you'll need to create as well.  Change line 30 in your code from "float pan;" to "float panPos;", you need to change the variable name rather than creating a new one so that the callback will work.  You also need to change your drawing code to use the panPos variable:

1.   ellipse(panPos, y, 50, 50);

Finally set the panner ugen's initial position to match your knob position.  Insert this at line 65:

1. p.setPos(-1.0);