<?xml version="1.0"?>

<!--

  c172p ski animations.

    Copyright (c) 2015 Wayne Bragg

    This program 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.

    This program 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 this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

-->

<system name="c172p-skis">

    <channel name="ski-rotations">

        <!-- atan(length_ski / alt_agl) -->
        <fcs_function name="ski/atan">
            <function>
                <atan>
                    <quotient>
                        <value>0.88078</value>
                        <sum>
                            <difference>
                                <property>/position/altitude-agl-m</property>
                                <value>1.4779</value>
                            </difference>
                            <value>1.14886</value>
                        </sum>
                    </quotient>
                </atan>
            </function>
        </fcs_function>

    </channel>

</system>