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add class that implements differential braking with rudder input

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mfranz 2007-05-08 09:52:13 +00:00
parent 065bd859d6
commit 6b533c19a9
1 changed files with 50 additions and 0 deletions
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Nasal/aircraft.nas
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@ -511,6 +511,56 @@ timer = {
# steering
# =============================================================================
# class that implements differential braking depending on rudder position
#
# SYNOPSIS:
# steering.init([<property> [, <threshold>]]);
#
# <property> ... property path or props.Node hash that enables/disables
# brake steering (usually bound to the js trigger button)
# <threshold> ... defines range (+- threshold) around neutral rudder
# position in which both brakes are applied
#
# EXAMPLES:
# aircraft.steering.init("/controls/gear/steering", 0.2);
# aircraft.steering.init();
#
var steering = {
init : func(switch = "/controls/gear/brake-steering", threshold = 0.3) {
me.threshold = threshold;
me.leftN = props.globals.getNode("/controls/gear/brake-left", 1);
me.rightN = props.globals.getNode("/controls/gear/brake-right", 1);
me.rudderN = props.globals.getNode("/controls/flight/rudder", 1);
var n = makeNode(switch);
n.setBoolValue(n.getBoolValue());
me.loopid = 0;
setlistener(n, func {
me.loopid += 1;
if (cmdarg().getBoolValue())
me._loop_(me.loopid);
else
me.setbrakes(0, 0);
}, 1);
},
_loop_ : func(id) {
me.loopid == id or return;
var rudder = me.rudderN.getValue();
if (rudder > me.threshold)
me.setbrakes(0, rudder);
elsif (rudder < -me.threshold)
me.setbrakes(-rudder, 0);
else
me.setbrakes(1, 1);
settimer(func { me._loop_(id) }, 0);
},
setbrakes : func(left, right) {
me.leftN.setDoubleValue(left);
me.rightN.setDoubleValue(right);
},
};