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<?xml version="1.0"?>

<PropertyList>
	<nasal>
		<headtracker>
			<script>
				var Value = {
					new: func(prop) {
						var m = { parents: [Value] };
						m.prop = props.globals.getNode(prop, 1);
						m.value = 0;
						return m;
					},
					apply: func(value) {
						me.prop.setDoubleValue(me.prop.getValue() - me.value + value);
						me.value = value;
					},
				};


				var x = Value.new("/sim/current-view/x-offset-m");
				var y = Value.new("/sim/current-view/y-offset-m");
				var z = Value.new("/sim/current-view/z-offset-m");
				var h = Value.new("/sim/current-view/heading-offset-deg");
				var p = Value.new("/sim/current-view/pitch-offset-deg");
				var r = Value.new("/sim/current-view/roll-offset-deg");


				var resetting = 0;
				var status = nil;

				var reset = func {
					if (status != 1) {
						setprop("/sim/headtracker/control", 1);
						resetting = 1;
						view.resetViewPos();
						view.resetViewDir();
						x.value = y.value = z.value = h.value = p.value = r.value = 0;
					}
				}

				setlistener("/sim/headtracker/status", func(n) {
					var s = n.getValue();
					if (!status and s) {
						setprop("/sim/headtracker/control", 0);
						resetting = 0;
					}
					status = s;
				}, 1, 0);


				var loop = func {
					if (!view.index and !resetting) {
						x.apply(getprop("/sim/headtracker/x-m"));
						y.apply(getprop("/sim/headtracker/y-m"));
						z.apply(getprop("/sim/headtracker/z-m"));

						h.apply(getprop("/sim/headtracker/heading-deg"));
						p.apply(getprop("/sim/headtracker/pitch-deg"));
						r.apply(-1 * getprop("/sim/headtracker/roll-deg"));
					}
					settimer(loop, 0);
				}

				loop();

			</script>
		</headtracker>
	</nasal>

	<sim>
		<headtracker>
			<x-m type="double">0</x-m>
			<y-m type="double">0</y-m>
			<z-m type="double">0</z-m>
			<heading-deg type="double">0</heading-deg>
			<pitch-deg type="double">0</pitch-deg>
			<roll-deg type="double">0</roll-deg>
			<status type="int">0</status>
			<control type="int">0</control>
		</headtracker>
	</sim>
</PropertyList>