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A320-family/Models/Instruments/ND/canvas/map/TERRAIN.symbol

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# See: http://wiki.flightgear.org/MapStructure
# Class things:
var name = 'TERRAIN';
var parents = [DotSym];
var __self__ = caller(0)[0];
DotSym.makeinstance( name, __self__ );
var element_type = "group";
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var tile_list = ["*black*","tile_01.png","tile_02.png","tile_03.png","tile_04.png","tile_06.png","tile_09.png"];
var radar_beacon = 0;
var radar_cycle = 0;
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var rader_cleared = 0;
var get_elevation = func (lat, lon) {
var info = geodinfo(lat, lon);
var elevation = 0;
if (info != nil) { elevation = int(info[0] * 3.2808399); }
else { elevation = nil; }
return elevation;
}
var updateTerrain = func(r_scaled){
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if(me.fetching) return;
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me.fetching = 1;
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me.rader_cleared = 0;
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var RAD2DEG = 57.2957795;
var DEG2RAD = 0.016774532925;
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var pos = geo.aircraft_position();
var pos_lat = pos.lat();
var pos_lon = pos.lon();
var heading = getprop("orientation/heading-magnetic-deg");
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var altitudeft = pos.alt() * 3.2808399;
if (me.basealtitudeft == nil) {
var basealtft = me.get_elevation(pos_lat,pos_lon);
if (basealtft == nil) basealtft = 0;
me.basealtitudeft = basealtft + 400;
}
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var side = (math.mod(me.radar_beacon,2)==0) ? "L" : "R";
var a = int(me.radar_beacon/2);
var col = a;
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if (side == "R") {
col = -1 + (-1 * a);
}
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#var col = me.radar_beacon - me.tileradius;
#for (var a=0; a < me.tileradius; a+=1) {
#var trnL = me.terrlayer["L" ~ a];
#var trnR = me.terrlayer["R" ~ a];
var trn = me.terrlayer[side ~ a];
var len = size(trn);
var range = me.range;
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var tiles = me.tile_list;
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var proj_lon = pos_lon + ((col * (range/30) * math.sin(DEG2RAD * (heading - 90))) / 30);
var proj_lat = pos_lat + ((col * (range/30) * math.cos(DEG2RAD * (heading - 90))) / 30);
var elevft = [];
for (var row = 0; row <= len; row += 1) {
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var point_lon = proj_lon + ((row * (range/30) / 30) * math.sin(DEG2RAD * heading));
var point_lat = proj_lat + ((row * (range/30) / 30) * math.cos(DEG2RAD * heading));
var elev = me.get_elevation(point_lat, point_lon);
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var grad = 0; #black
if (elev != nil) {
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if (elev < me.basealtitudeft) grad = 0; # < 400 (at airport) use blank - trivial
else {
var diff = elev - altitudeft;
if (diff>=0) {
grad = int(diff/1000) + 3;
if (grad>5) grad = 5;
} else {
if (diff>-500) grad = 3; # lite yellow
else {
grad = 2 + int(diff/1000);
if (grad<0) grad = 0;
}
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}
}
append(elevft,grad); # 0-5
} else {
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append(elevft,6); # magenta
}
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}
for (var r=0; r < len; r+=1) {
var imgx = elevft[r];
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if (imgx < 1) trn[r].hide();
else trn[r].setFile(me.imgpath ~ me.tile_list[imgx]).show();
#trnR[r].setFile(me.imgpath ~ me.tile_list[2-imgx]).show();
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}
#}
me.radar_beacon += 1;
if (me.radar_beacon >= (me.tileradius*2)) {
me.radar_beacon = 0;
me.radar_cycle += 1;
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}
#me.last_request = getprop("sim/time/elapsed-sec");
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me.fetching = 0;
};
var init = func {
#print('TERRAIN init');
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me.tile = 33; # preferred 34
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me.fetching = 0;
me.timeStamp = nil;
me.fetchRad = me.model.fetchRad; # Radius of radar layer to fetch
me.range = me.model.rangeNm; # Range of Navigation Display
me.viewport_radius = me.getOption('viewport_radius', 670);
me.imgpath = get_local_path('res/terrain/');
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me.rader_cleared = 1;
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me.basealtitudeft = nil;
me.visible = 0;
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var tile = me.tile;
var gx = int(me.viewport_radius / tile);
me.tileradius = gx;
me.terrlayer = {}; #me.element.createChild("image").set("z-index", -100).hide();
var centx = 0; #me.viewport_radius * -0.5;
var centy = -me.viewport_radius;
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var group = me.group.createChild("group").set("z-index", -100); #me.element
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for (var c=0; c<gx; c+=1) {
var hh = c * tile;
var mx = (c == 0) ? gx : int(math.sqrt(gx*gx-c*c) + 0.5);
var py = centy + (gx-1) * tile;
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var pxr = centx+(c*tile);
var pxl = centx-(c*tile)-tile;
var grplx = [];
var grprx = [];
for (var r=0; r<mx; r+=1) {
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append(grplx , group.createChild("image").setSize(tile,tile).setTranslation(pxl,py).hide()); #.set("z-index", -100)
append(grprx , group.createChild("image").setSize(tile,tile).setTranslation(pxr,py).hide()); #.set("z-index", -100)
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py-=tile;
}
me.terrlayer["L" ~ c] = grplx;
me.terrlayer["R" ~ c] = grprx;
}
me.update_interval = 300;
me.last_request = 0;
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#var r_scaled = (me.fetchRad*me.viewport_radius)/me.range;
#me.fetchWXRMap(r_scaled);
#me.timeStamp = nil;
#http.load("https://api.rainviewer.com/public/maps.json").done(func(r) me.timeStamp = processRequest(r));
};
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var clear = func {
if (me.rader_cleared == 0) {
for (var c=0; c<me.tileradius; c+=1 ) {
var rowL = me.terrlayer["L" ~ c];
var rowR = me.terrlayer["R" ~ c];
var len = size(rowL);
for (var r=0; r<len; r+=1) {
rowL[r].hide();
rowR[r].hide();
}
}
me.rader_cleared = 1;
}
}
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var draw = func {
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var range = me.layer.map.getRange(); # Range of Navigation Display
var update_size = (range != me.range);
me.range = range;
me.fetchRad = me.model.fetchRad; # Radius of radar layer to fetch
var r_scaled = (me.fetchRad*me.viewport_radius)/me.range;
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var update_visible = (me.group.getVisible() != me.visible);
if(update_size or update_visible){
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me.clear();
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me.visible = me.group.getVisible();
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}
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#var rot = getprop("orientation/heading-deg");
#rot -= me.layer.map.getHdg();
#me.element.setRotation(rot*D2R);
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me.updateTerrain(r_scaled);
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};