high/low aircraft relative altitude modes

Models/Instruments/ND/canvas/map/TERRAIN.symbol

@@ -10,7 +10,11 @@ var element_type = "group";
 var terrain_minalt = props.globals.initNode("/custom/terrain/min-altitude", 0,"INT");
 var terrain_maxalt = props.globals.initNode("/custom/terrain/max-altitude", -9999,"INT");
 
-var tile_list = ["*black*","tile_01.png","tile_02.png","tile_03.png","tile_04.png","tile_06.png","tile_09.png","tile_s1.png"];
+var tile_list = [
+				nil,"tile_gl.png","tile_gh.png","tile_yl.png","tile_yh.png","tile_rh.png", # 0-5  low alt
+				"tile_gl.png","tile_gh.png","tile_gs.png",nil, # 6-9 hi alt
+				"tile_ml.png","tile_cl.png"  # 10 magenta - 11 cyan (water)
+				];
 
 var is_terrain = 0;
 
@@ -36,6 +40,7 @@ var updateTerrain = func {
 	if (me.request_clear == 1) {
 		me.request_clear = 0;
 		me.clear();
+		me.group.setVisible(1);
 	}
 
 	var RAD2DEG = 57.2957795;
@@ -44,15 +49,17 @@ var updateTerrain = func {
 	var pos_lat = me.reference.lat();
 	var pos_lon = me.reference.lon();
 	
-	var heading = me.reference.heading;
-	var altitudeft = me.reference.altitudeft;
+	var heading = me.refheading;
+	var altitudeft = me.refaltitudeft;
+	var lowaltft = me.reflowaltft;
+	var basealtft = me.basealtitudeft;
 
 	var side = (math.mod(me.radar_beacon,2)==0) ? "L" : "R";
 	var a = int(me.radar_beacon/2);
-    var col = a;
+    var col = a + 0.5;
 
 	if (side == "R") {
-		col = -1 + (-1 * a);
+		col = -col;
 	}
 
 	var trn = me.terrlayer[side ~ a];
@@ -67,6 +74,8 @@ var updateTerrain = func {
 
 	var elevft = [];
 
+	me.radar_cleared = 0;
+
 	for (var row = 0; row < len; row += 1) {
 
 		if (trn[row] == nil) {
@@ -80,36 +89,44 @@ var updateTerrain = func {
 		var elev = me.get_elevation(point_lat, point_lon);
 		var grad = 0; #black
 		if (elev != nil) {
+			if (elev<me.min_altitude) me.min_altitude = elev;
+			else if (elev>me.max_altitude) me.max_altitude = elev;
 			if (me.is_terrain) {	
-				if (elev<me.min_altitude) me.min_altitude = elev;
-				else if (elev>me.max_altitude) me.max_altitude = elev;
-				if (elev < me.basealtitudeft) grad = 0; # < 400 near runway use blank
+				if (elev < basealtft) grad = 0; # < 400 near runway use blank
 				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;
+						if (me.hialtmode == 0) {
+							if (diff>=lowaltft) grad = 3; # lite yellow
+							else {
+								grad = 2 + int(diff/1000);
+								if (grad<0) grad = 0;
+							}						
+						} else {
+							if (diff>=lowaltft) grad = 3; # lite yellow
+							else {
+							    if (me.bands_range > 0 and elev > me.bands_minalt) {
+									elev -= me.bands_minalt;
+									grad = int(elev / (me.bands_range / 3)) + 6;
+									if (grad>8) grad = 8; # solid green
+								}
+							}
 						}
 					}
 				}
 			} else {
-				var diff = elev - altitudeft;
-				if (diff>=-2000) grad = 7; #sea
+				grad = 11; #water
 			}
 			append(elevft,grad); # 0-5
 		} else {
-			append(elevft,6);  # magenta
+			append(elevft,0);  # no data - black (magenta)
 		}
 		
 	}
 
-	me.radar_cleared = 0;
-
 	for (var r=0; r < len; r+=1) {
 		var imgx = elevft[r];
 		if (imgx == -1) continue;			
@@ -123,20 +140,30 @@ var updateTerrain = func {
 		me.restart_beacon();
 	}
 	
-	#me.last_request = getprop("sim/time/elapsed-sec");
 	me.fetching = 0;
 };
 
 var update_altitudes = func {
 	me.terrain_minalt.setValue(me.min_altitude);
 	me.terrain_maxalt.setValue(me.max_altitude);
+
+	if (me.max_altitude < me.refaltitudeft) {
+		me.hialtmode = 1;
+	} else {
+		me.hialtmode = 0;
+	}
+	
 }
 
 var restart_beacon = func {
 	me.radar_beacon = 0;
 	me.radar_cycle += 1;
-	me.min_altitude = 9999;
+	me.bands_minalt = me.min_altitude;
+	me.bands_maxalt = math.max(1000,me.max_altitude); # band min limit to 1000 ft - trivial
+	me.bands_range = me.bands_maxalt - me.bands_minalt;
+ 	me.min_altitude = 9999;
 	me.max_altitude = -9999;
+	me.reference = nil;
 };
 
 var init = func {
@@ -155,9 +182,13 @@ var init = func {
 	me.visible = 0;
 	me.min_altitude = 9999;
 	me.max_altitude = -9999;
+	me.bands_minalt = 0;
+	me.bands_maxalt = 0;
+	me.bands_range = 0;
 	me.basealtitudeft = nil;
 	me.reference = nil;
 	me.onfailure = 0;
+	me.hialtmode = 0; # high aircraft relative altitude mode
 
 	var tile = me.tile;
 
@@ -197,13 +228,9 @@ var init = func {
 		me.terrlayer["R" ~ c] = grprx;
 	}
 
-	setlistener("/controls/switches/terr_on_nd_l", func{
-		me.request_clear = 1;
-	});
-
-	setlistener("/ECAM/warnings/timer/nav-gpws-terr-fault", func{
-		me.onfailure = getprop("/ECAM/warnings/timer/nav-gpws-terr-fault");
-	});
+	#setlistener("/ECAM/warnings/timer/nav-gpws-terr-fault", func{   # TODO need further investigations
+	#	me.onfailure = getprop("/ECAM/warnings/timer/nav-gpws-terr-fault");
+	#});
 
 };
 
@@ -236,19 +263,20 @@ var draw = func {
 		return;
 	}
 
-	if (me.radar_beacon == 0) {  # update aircraft reference
+	if (me.reference == nil) {  # update aircraft reference
 
 		var ref = geo.aircraft_position();
 		me.reference = ref;
 		if (ref != nil) {
-			me.reference.heading = getprop("orientation/heading-magnetic-deg");
-			me.reference.altitudeft = ref.alt() * 3.2808399;
+			me.refheading = getprop("orientation/heading-magnetic-deg");
 
-			if (me.basealtitudeft == nil) {
+			var refalt = ref.alt() * 3.2808399;
+			me.refaltitudeft = refalt;
+			me.reflowaltft = (pts.Gear.position[1].getValue()) ? -250 : -500;
+			
+			if (fmgc.FMGCInternal.phase<2) {			
 				#var basealtft = me.get_elevation(ref.lat,ref.lon);
-				var basealtft = ref.alt() * 3.2808399;
-				if (basealtft == nil) basealtft = 0;
-				me.basealtitudeft = basealtft + 400;
+				me.basealtitudeft = refalt + 400;
 			}
 
 			#if (fmgc.FMGCInternal.phase >= 5 and me.basealtitudeft == 0) {
@@ -260,19 +288,26 @@ var draw = func {
 			#else if ((fmgc.FMGCInternal.phase > 1 and fmgc.FMGCInternal.phase < 5) and (me.basealtitudeft != 0)) {
 			#	me.basealtitudeft = 0;
 			#}
-
 		}
+
+	} else {
+
+		if (me.layer.display_changed == 1) {
+			me.layer.display_changed = 0;
+			me.request_clear = 1;
+		}
+
+		var range = me.layer.map.getRange(); # Range of Navigation Display
+		var update_size = (range != me.range);
+		me.range = range;
+
+		if(update_size){
+			me.request_clear = 1;
+		}
+
+		me.updateTerrain(); # left
+		if (math.mod(me.radar_beacon,2)==1) me.updateTerrain(); # right
+
 	}
 
-	var range = me.layer.map.getRange(); # Range of Navigation Display
-	var update_size = (range != me.range);
-	me.range = range;
-
-	if(update_size){
-		me.request_clear = 1;
-	}
-
-	me.updateTerrain(); # left
-	if (math.mod(me.radar_beacon,2)==1) me.updateTerrain(); # right
-
 };

Models/Instruments/ND/canvas/style.nas

@@ -97,6 +97,8 @@ canvas.NDStyles["Airbus"] = {
 					(nd.adirs_property.getValue() == 1 or (adirs_3.getValue()  == 1 and att_switch.getValue() == nd.attitude_heading_setting));				
 				if (visible) {
 					layer.update(); 
+				} else {
+					layer.display_changed = 1;
 				}
 				layer.group.setVisible(visible);
 			}, # end of layer update predicate