# Class things:
var name = 'TFC';
var parents = [Symbol.Controller];
var __self__ = caller(0)[0];
Symbol.Controller.add(name, __self__);
Symbol.registry[name].df_controller = __self__;
var new = func(model) ; # this controller doesn't need an instance
# XXX: this is more model-ish than controller-ish
var get_threat_lvl = func(model) model.getValue("tcas/threat-level");
var get_vspd       = func(model) (model.getValue("velocities/vertical-speed-fps") or 0)*60;
var get_alt_diff   = func(model) (model.getValue("position/altitude-ft") or 0) - (getprop("/position/altitude-ft") or 0);