#Functions

User-defined functions let you organize scripts and reuse logic across multiple call sites.

#Declaration

function smoothCurve(t, gamma) {
  return pow(t, gamma);
}

Functions can take zero or more arguments and return any value (number, object, or tuple).

#Calling

result = smoothCurve(0.5, 2.0);

Functions can be called from anywhere in the script after they're declared, including from inside other functions.

#Returning multiple values

Like top-level scripts, functions can return tuples:

function polar(x, y) {
  return (hypot(x, y), atan2(y, x));
}

#Calling from the GUI

Functions can be wired to GUI buttons via the //!gui:button directive (see GUI directives):

//!gui:button label="Reset" func="resetState"

function resetState() {
  state.i = 0;
  state.prevErr = 0;
  return 0;
}