# Copyright 2020 Benedikt Wolf
# 	with parts by Gilberto Agonstinho, WooT, Joshau Davidsonm, Colin Geniet
# This file is part of FlightGear.
#
# FlightGear is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# FlightGear is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with FlightGear.  If not, see <http://www.gnu.org/licenses/>.


To install this instrument into your aircraft, you need to do the following:

1.	Enable a second altimeter (<altimeter n="1">) module through the aircraft's instrumentation.xml (in case a custom one is used). 
	Make sure instrumentation/altimeter[1]/serviceable is set to true via your -set.xml file.
2.	Add S3.nas to your aircraft's list of included nasal files:
	<nasal>
		...
		<s3>
			<file>Aircraft/Instruments-3d/glider/vario/S3/S3.nas</file>
		</s3>
		...
	</nasal>
	** Note that it is important to put the file into <s3></s3> tags, as the animation xml may in the future reference the instrument by that name
3.	Add the model to your aircraft:
	<model>
		<path>Aircraft/Instruments-3d/glider/vario/S3/S3.xml</path>
		...
	</model>
4.	If you are using a custom electric system, make sure the vario is supplied at /systems/electrical/outputs/S3 when appropriate
5.	Add sound effects for this vario, e.g. by using the block below and adjusting it to fit:

<variometer-up>
	<name>variometer-up</name>
	<mode>looped</mode>
	<path>Aircraft/Instruments-3d/glider/vario/ilec-sc7/vario.wav</path>
	<condition>
		<and>
			<greater-than>
				<property>instrumentation/s3/te-reading-mps</property>
				<value>0.01</value>
			</greater-than>
			<greater-than-equals>
				<property>systems/electrical/outputs/S3</property>
				<value>9</value>
			</greater-than-equals>
			<equals>
				<property>instrumentation/s3/start</property>
				<value>1.0</value>
			</equals>
		</and>
	</condition>
	<pitch>
		<property>instrumentation/s3/sound-pitch</property>
		<offset>0</offset>
	</pitch>
	<volume>
		<property>instrumentation/s3/volume</property>
		<factor>1</factor>
		<max>1</max>
	</volume>
	<!-- Put the position of your variometer loudspeaker here -->
	<position>
		<x>-3.35</x>
		<y>0</y>
		<z>0.7</z>
	</position>
	<reference-dist>0.5</reference-dist>
	<max-dist>2.0</max-dist>
</variometer-up>

<variometer-down>
	<name>variometer-down</name>
	<mode>looped</mode>
	<path>Aircraft/Instruments-3d/glider/vario/ilec-sc7/vario2.wav</path>
	<condition>
		<and>
			<greater-than>
				<property>instrumentation/s3/te-reading-mps</property>
				<value>-10.00</value>
			</greater-than>
			<less-than>
				<property>instrumentation/s3/te-reading-mps</property>
				<value>-0.01</value>
			</less-than>
			<greater-than-equals>
				<property>systems/electrical/outputs/S3</property>
				<value>9</value>
			</greater-than-equals>
			<equals>
				<property>instrumentation/s3/start</property>
				<value>1.0</value>
			</equals>
		</and>
	</condition>
	<pitch>
		<property>instrumentation/s3/sound-pitch</property>
		<offset>0</offset>
	</pitch>
	<volume>
		<property>instrumentation/s3/volume</property>
		<factor>1</factor>
		<max>1</max>
	</volume>
	<!-- Put the position of your variometer loudspeaker here -->
	<position>
		<x>-3.35</x>
		<y>0</y>
		<z>0.7</z>
	</position>
	<reference-dist>0.5</reference-dist>
	<max-dist>2.0</max-dist>
</variometer-down>



## Please report any bugs, issues and improvements either to the mailing list of FlightGear forum so they can be fixed/included in the shared version of this instrument