418 lines
13 KiB
Text
418 lines
13 KiB
Text
if (globals["tanker"] != nil) {
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# reload with io.load_nasal(getprop("/sim/fg-root") ~ "/Nasal/tanker.nas");
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print("reloading " ~ caller(0)[2]);
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var _setlistener = reinit;
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reinit();
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}
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#--------------------------------------------------------------------------------------------------
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var oclock = func(bearing) int(0.5 + geo.normdeg(bearing) / 30) or 12;
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var tanker_msg = func setprop("sim/messages/ai-plane", call(sprintf, arg));
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var pilot_msg = func setprop("/sim/messages/pilot", call(sprintf, arg));
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var atc_msg = func setprop("sim/messages/atc", call(sprintf, arg));
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var skip_cloud_layer = func(alt) {
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var c = [];
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foreach (var layer; props.globals.getNode("/environment/clouds").getChildren("layer")) {
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var elev = (layer.getNode("elevation-ft", 1).getValue() or -9999) * FT2M;
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var thck = (layer.getNode("thickness-ft", 1).getValue() or 0) * FT2M;
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if (elev > -1000)
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append(c, { bottom: elev - thck * 0.5 - 100, top: elev + thck * 0.5 + 100 });
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}
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while (check; 1) {
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foreach (var layer; c) {
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if (alt > layer.bottom and alt < layer.top) {
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alt += 1000;
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continue check;
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}
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}
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return alt;
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}
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}
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var identity = {
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get: func {
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# return free AI id number and least used, free callsign/channel pair
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var data = {}; # copy of me.pool
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var revdata = {}; # channel->callsign
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foreach (var k; keys(me.pool)) {
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data[k] = me.pool[k];
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revdata[me.pool[k][0]] = k;
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}
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var id_used = {};
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foreach (var t; props.globals.getNode("ai/models", 1).getChildren()) {
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if ((var c = t.getNode("callsign")) != nil)
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delete(data, c.getValue() or "");
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if ((var c = t.getNode("navaids/tacan/channel-ID")) != nil)
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delete(data, revdata[c.getValue() or ""]);
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if ((var c = t.getNode("id")) != nil)
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id_used[c.getValue()] = 1;
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}
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for (var aiid = -2; aiid; aiid -= 1)
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if (!id_used[aiid])
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break;
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if (!size(data))
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return [aiid, "MOBIL3", "062X"];
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var d = sort(keys(data), func(a, b) data[a][1] - data[b][1])[0];
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me.pool[d][1] += 1;
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return [aiid, d, data[d][0]];
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},
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pool: {
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ESSO1: ["040X", rand()], ESSO2: ["041X", rand()], ESSO3: ["042X", rand()],
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TEXACO1: ["050X", rand()], TEXACO2: ["051X", rand()], TEXACO3: ["052X", rand()],
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MOBIL1: ["060X", rand()], MOBIL2: ["061X", rand()], MOBIL3: ["062X", rand()],
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},
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};
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var Tanker = {
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new: func(aiid, callsign, tacan, type, model, kias, maxfuel, pattern, contacts, heading, coord) {
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var m = { parents: [Tanker] };
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m.callsign = callsign;
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m.tacan = tacan;
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m.kias = kias;
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m.heading = m.course = m.track_course = heading;
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m.out_of_range_time = 0;
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m.interval = 10;
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m.length = pattern;
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m.contacts = contacts;
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m.roll = 0;
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m.coord = geo.Coord.new(coord);
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m.anchor = geo.Coord.new(coord).apply_course_distance(m.track_course, m.length); # ARCP
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m.goal = [nil, m.anchor];
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m.lastmode = "none";
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m.mode = "leg";
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m.rollrate = 2; # deg/s
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m.maxbank = 25;
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var n = props.globals.getNode("models", 1);
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for (var i = 0; 1; i += 1)
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if (n.getChild("model", i, 0) == nil)
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break;
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m.model = n.getChild("model", i, 1);
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var n = props.globals.getNode("ai/models", 1);
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for (var i = 0; 1; i += 1)
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if (n.getChild("tanker", i, 0) == nil)
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break;
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m.ai = n.getChild("tanker", i, 1);
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m.ai.getNode("id", 1).setIntValue(aiid);
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m.ai.getNode("callsign", 1).setValue(m.callsign ~ "");
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m.ai.getNode("tanker", 1).setBoolValue(1);
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m.ai.getNode("valid", 1).setBoolValue(1);
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m.ai.getNode("navaids/tacan/channel-ID", 1).setValue(m.tacan);
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m.ai.getNode("refuel/type", 1).setValue(type);
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m.ai.getNode("refuel/max-fuel-transfer-lbs-min", 1).setValue(maxfuel);
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m.ai.getNode("refuel/contact", 1).setBoolValue(0);
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m.ai.getNode("radar/in-range", 1).setBoolValue(1);
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m.latN = m.ai.getNode("position/latitude-deg", 1);
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m.lonN = m.ai.getNode("position/longitude-deg", 1);
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m.altN = m.ai.getNode("position/altitude-ft", 1);
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m.hdgN = m.ai.getNode("orientation/true-heading-deg", 1);
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m.pitchN = m.ai.getNode("orientation/pitch-deg", 1);
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m.rollN = m.ai.getNode("orientation/roll-deg", 1);
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m.ktasN = m.ai.getNode("velocities/true-airspeed-kt", 1);
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m.vertN = m.ai.getNode("velocities/vertical-speed-fps", 1);
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m.rangeN = m.ai.getNode("radar/range-nm", 1);
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m.brgN = m.ai.getNode("radar/bearing-deg", 1);
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m.elevN = m.ai.getNode("radar/elevation-deg", 1);
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m.contactN = m.ai.getNode("refuel/contact", 1);
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m.hOffsetN = m.ai.getNode("radar/h-offset", 1);
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m.vOffsetN = m.ai.getNode("radar/v-offset", 1);
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m.update();
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m.model.getNode("path", 1).setValue(model);
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m.model.getNode("latitude-deg-prop", 1).setValue(m.latN.getPath());
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m.model.getNode("longitude-deg-prop", 1).setValue(m.lonN.getPath());
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m.model.getNode("elevation-ft-prop", 1).setValue(m.altN.getPath());
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m.model.getNode("heading-deg-prop", 1).setValue(m.hdgN.getPath());
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m.model.getNode("pitch-deg-prop", 1).setValue(m.pitchN.getPath());
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m.model.getNode("roll-deg-prop", 1).setValue(m.rollN.getPath());
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m.model.getNode("load", 1).remove();
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m.identify();
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return Tanker.active[m.callsign] = m;
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},
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del: func {
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tanker_msg(me.callsign ~ " returns to base");
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me.model.remove();
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me.ai.remove();
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delete(Tanker.active, me.callsign);
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},
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update: func {
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var dt = getprop("sim/time/delta-sec");
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var alt = me.coord.alt();
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if ((me.interval += dt) >= 5) {
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me.interval -= 5;
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me.headwind = aircraft.wind_speed_from(me.course);
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me.ktas = aircraft.kias_to_ktas(me.kias, alt);
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}
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var distance = dt * (me.ktas - me.headwind) * NM2M / 3600;
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var deviation = me.roll ? dt * 1085.941 * math.tan(me.roll * D2R) / me.ktas : 0;
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if (me.mode == "leg") {
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if (me.lastmode != "leg") {
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me.lastmode = "leg";
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# swap ARCP anchor and tanker exit point as leg end points
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var g = me.goal[0];
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me.goal[0] = me.goal[1];
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me.goal[1] = g;
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me.course = me.coord.course_to(me.goal[0]);
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me.leg_remaining = me.coord.distance_to(me.goal[0]);
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me.roll_target = 0;
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me.leg_warning = 0;
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}
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if ((me.leg_remaining -= distance) < 0)
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me.mode = "turn";
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} else { # me.mode == "turn"
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if (me.lastmode != "turn") {
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me.lastmode = "turn";
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me.full_bank_turn_angle = 0;
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me.turn_remaining = 180;
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me.roll_target = 25;
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}
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if (!me.full_bank_turn_angle and me.roll >= me.roll_target)
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me.full_bank_turn_angle = geo.normdeg(180 - me.turn_remaining);
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if (me.turn_remaining < me.full_bank_turn_angle)
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me.roll_target = 0;
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if ((me.turn_remaining -= deviation) < 0) {
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if (me.goal[1] == nil) # define tanker exit point (opposite of anchor point/ARCP)
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me.goal[1] = geo.Coord.new(me.coord).apply_course_distance(me.track_course - 180,
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me.length);
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me.mode = "leg";
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}
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}
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me.coord.apply_course_distance(me.course -= deviation, distance);
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me.ac = geo.aircraft_position();
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me.distance = me.ac.distance_to(me.coord);
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me.bearing = me.ac.course_to(me.coord);
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var dalt = alt - me.ac.alt();
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var ac_hdg = getprop("/orientation/heading-deg");
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var ac_pitch = getprop("/orientation/pitch-deg");
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var ac_contact_dist = getprop("/systems/refuel/contact-radius-m");
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var elev = math.atan2(dalt, me.distance) * R2D;
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me.latN.setDoubleValue(me.coord.lat());
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me.lonN.setDoubleValue(me.coord.lon());
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me.altN.setDoubleValue(alt * M2FT);
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me.hdgN.setDoubleValue(me.heading = me.course);
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me.pitchN.setDoubleValue(0);
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me.rollN.setDoubleValue(-me.roll);
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me.ktasN.setDoubleValue(me.ktas);
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me.vertN.setDoubleValue(0);
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me.rangeN.setDoubleValue(me.distance * M2NM);
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me.brgN.setDoubleValue(me.bearing);
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me.elevN.setDoubleValue(elev);
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# Determine if any of the contact points are in contact
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var offset_x = getprop("/systems/refuel/offset-x-m") or 0;
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var offset_y = getprop("/systems/refuel/offset-y-m") or 0;
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var offset_z = getprop("/systems/refuel/offset-z-m") or 0;
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var roll = getprop("/orientation/roll-deg") * globals.D2R;
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# Determine contact position
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var probe_pos = geo.Coord.new(me.ac);
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probe_pos.apply_course_distance(ac_hdg, offset_x);
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probe_pos.apply_course_distance(ac_hdg + 90, offset_y * math.cos(roll) + offset_z * math.sin(roll));
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probe_pos.set_alt(me.ac.alt() + offset_z * math.cos(roll) - offset_y * math.sin(roll));
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me.contactN.setBoolValue(0);
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foreach (var c; me.contacts) {
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var drogue_pos = geo.Coord.new(me.coord);
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# Offset longitudonally
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drogue_pos.apply_course_distance(me.course, c.x);
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var r = me.roll * globals.D2R;
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# Offset laterally, taking into account any roll
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drogue_pos.apply_course_distance(me.course +90, c.y * math.cos(r) + c.z * math.sin(r));
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# Offset vertically, again, taking into account any roll
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drogue_pos.set_alt(drogue_pos.alt() + c.z * math.cos(r) - c.y * math.sin(r));
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#print("Distance: " ~ probe_pos.distance_to(drogue_pos) ~ " vs. " ~ me.distance);
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if (probe_pos.distance_to(drogue_pos) < ac_contact_dist and
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abs(view.normdeg(me.course - ac_hdg)) < 20) {
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# Contact!
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me.contactN.setBoolValue(1);
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}
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}
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me.hOffsetN.setDoubleValue(view.normdeg(me.bearing - ac_hdg));
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me.vOffsetN.setDoubleValue(view.normdeg(elev - ac_pitch));
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var droll = me.roll_target - me.roll;
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if (droll > 0) {
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me.roll += me.rollrate * dt;
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if (me.roll > me.roll_target)
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me.roll = me.roll_target;
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} elsif (droll < 0) {
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me.roll -= me.rollrate * dt;
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if (me.roll < me.roll_target)
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me.roll = me.roll_target;
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}
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if (!me.leg_warning and me.leg_remaining < NM2M) {
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tanker_msg(me.callsign ~ ", turn in one mile");
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me.leg_warning = 1;
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}
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me.now = getprop("/sim/time/elapsed-sec");
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if (me.distance < 90000)
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me.out_of_range_time = me.now;
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elsif (me.now - me.out_of_range_time > 600)
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return me.del();
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settimer(func me.update(), 0);
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},
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identify: func {
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me.out_of_range_time = me.now;
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var alt = int((me.coord.alt() * M2FT + 50) / 100) * 100;
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tanker_msg("%s at %.0f, heading %.0f with %.0f knots, TACAN %s",
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me.callsign, alt, me.course, me.kias, me.tacan);
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},
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report: func {
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me.out_of_range_time = me.now;
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var dist = int(me.distance * M2NM);
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var hdg = getprop("orientation/heading-deg");
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var diff = (me.coord.alt() - me.ac.alt()) * M2FT;
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var qual = diff > 3000 ? " well" : abs(diff) > 1000 ? " slightly" : "";
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var rel = diff > 1000 ? " above" : diff < -1000 ? " below" : "";
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atc_msg("Tanker %s is at %s o'clock%s",
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me.callsign, oclock(me.ac.course_to(me.coord) - hdg),
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qual ~ rel);
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},
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active: {},
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};
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# Factory methods
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# Create a tanker based on a given /sim/ai/tankers/tanker property node
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var create_tanker = func(tanker_node, course) {
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var (aiid, callsign, tacanid) =_= identity.get();
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var model = tanker_node.getNode("model", 1).getValue();
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var type = tanker_node.getNode("type", 1).getValue();
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var spd = tanker_node.getNode("speed-kts", 1).getValue() or 250;
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var pattern = (tanker_node.getNode("pattern-length-nm", 1).getValue() or 50) * NM2M;
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var maxfuel = tanker_node.getNode("max-fuel-transfer-lbs-min", 1).getValue() or 6000;
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var contacts = [];
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foreach (var contact; tanker_node.getChildren("contact")) {
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var x = (contact.getNode("x-m") != nil) ? contact.getNode("x-m").getValue() : 0;
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var y = (contact.getNode("y-m") != nil) ? contact.getNode("y-m").getValue() : 0;
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var z = (contact.getNode("z-m") != nil) ? contact.getNode("z-m").getValue() : 0;
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append(contacts, { "x" : x, "y" : y, "z" : z });
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}
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if (size(contacts) == 0) {
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append(contacts, {x: 0, y:0, z:0});
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}
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var alt = int(10 + rand() * 15) * 1000; # FL100--FL250
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alt = skip_cloud_layer(alt * FT2M);
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var dist = 6000 + rand() * 4000;
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var coord = geo.aircraft_position().apply_course_distance(course, dist).set_alt(alt);
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Tanker.new(aiid, callsign, tacanid, type, model, spd, maxfuel, pattern, contacts, course, coord);
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}
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# Request a new tanker
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var request_new = func(tanker_node=nil) {
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var tanker = values(Tanker.active);
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if (size(tanker)) tanker[0].del();
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request(tanker_node);
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}
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var request = func(tanker_node=nil) {
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var tanker = values(Tanker.active);
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if (size(tanker))
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return tanker[0].identify();
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if (tanker_node == nil) {
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var type = props.globals.getNode("systems/refuel", 1).getChildren("type");
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if (!size(type))
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return;
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type = type[rand() * size(type)].getValue();
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var tankers = props.globals.getNode("/sim/ai/tankers", 1).getChildren("tanker");
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foreach (var tanker; tankers) {
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if (tanker.getNode("type", 1).getValue() == type) {
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tanker_node = tanker;
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break;
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}
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}
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}
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var hdg = getprop("orientation/heading-deg");
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var course = hdg + (rand() - 0.5) * 60;
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create_tanker(tanker_node, course);
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}
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var request_random = func(tanker_node=nil) {
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var tanker = values(Tanker.active);
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if (size(tanker))
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return tanker[0].identify();
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if (tanker_node == nil) {
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var type = props.globals.getNode("systems/refuel", 1).getChildren("type");
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if (!size(type))
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return;
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type = type[rand() * size(type)].getValue();
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var tankers = props.globals.getNode("/sim/ai/tankers", 1).getChildren("tanker");
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foreach (var tanker; tankers) {
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if (tanker.getNode("type", 1).getValue() == type) {
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tanker_node = tanker;
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break;
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}
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}
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}
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var course = rand() * 360;
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create_tanker(tanker_node, course);
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}
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var report = func {
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var tanker = values(Tanker.active);
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if (size(tanker))
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tanker[0].report();
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}
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var reinit = func {
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foreach (var t; values(Tanker.active))
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t.del();
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}
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_setlistener("/sim/signals/nasal-dir-initialized", func {
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var aar_capable = size(props.globals.getNode("systems/refuel", 1).getChildren("type"));
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gui.menuEnable("tanker", aar_capable);
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if (!aar_capable)
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request = func { atc_msg("no tanker in range") }; # braces mandatory
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setlistener("/sim/signals/reinit", reinit, 1);
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});
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