oprf_assets/missile-frigate/Nasal/fdm.nas
2016-12-22 00:31:49 -08:00

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# Copyright (C) 2015 onox
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
#io.include("Aircraft/ExpansionPack/Nasal/init.nas");
#with("updateloop");
# Number of iterations per second
var frequency = 20.0;
# Change in heading per second at full rudder deflection
var heading_ps = 0.5;
time_last = 0;
sim_speed = 1;
sink_rate = .025;
pitch_rate = .007;
roll_rate = .007;
setprop("/carrier/pitch-deg",0);
setprop("/carrier/pitch-offset",0);
setprop("/carrier/roll-deg",0);
setprop("/carrier/roll-offset",0);
setprop("/carrier/sunk",0);
var PositionUpdater = func () {
settimer( PositionUpdater, 1/frequency );
var position = geo.aircraft_position();
var time_now = getprop("/sim/time/elapsed-sec");
var dt = (time_now - time_last) * sim_speed;
if (dt == 0) return;
time_last = time_now;
var heading = getprop("/orientation/heading-deg");
var speed = getprop("/velocities/groundspeed-kt");
var rudder = getprop("/surface-positions/rudder-pos-norm");
var distance = speed * globals.KT2MPS * dt;
position.apply_course_distance(heading, distance);
# Set new position
setprop("/position/latitude-deg", position.lat());
setprop("/position/longitude-deg", position.lon());
if ( getprop("/carrier/sunk") == 0 ) {
# Update heading
var course = heading + rudder * heading_ps * dt;
setprop("/orientation/heading-deg", course);
} else {
setprop("/carrier/fbw/target/groundspeed-kt",0);
setprop("/controls/engines/engine/throttle",0);
# Set new position
setprop("/position/latitude-deg", position.lat());
setprop("/position/longitude-deg", position.lon());
#calculate sinking.
setprop("/position/altitude-ft",getprop("/position/altitude-ft") - ( sink_rate ));
setprop("/carrier/pitch-offset",getprop("/carrier/pitch-offset") + ( pitch_rate ));
setprop("/carrier/roll-offset",getprop("/carrier/roll-offset") + ( roll_rate ));
}
#set pitch
setprop("/orientation/pitch-deg",getprop("/carrier/pitch-deg") + getprop("/carrier/pitch-offset"));
#set roll
setprop("/orientation/roll-deg",getprop("/carrier/roll-deg") + getprop("/carrier/roll-offset"));
};
PositionUpdater();