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########################################################
# routines to set up, transform and manage weather tiles
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# Thorsten Renk, July 2010
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########################################################
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# function purpose
#
# tile_management_loop to decide if a tile is created, removed or considered current
# generate_tile to decide on orientation and type and set up all information for tile creation
# remove_tile to delete a tile by index
# change_active_tile to change the tile the aircraft is currently in and to generate neighbour info
# copy_entry to copy tile information from one node to another
# create_neighbour to set up information for a new neighbouring tile
# create_neighbours to initialize the 8 neighbours of the initial tile
# calc_geo to get local Cartesian geometry for latitude conversion
# get_lat to get latitude from Cartesian coordinates
# get_lon to get longitude from Cartesian coordinates
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###################################
# tile management loop
###################################
var tile_management_loop = func {
var tNode = props.globals.getNode(lw~"tiles", 1).getChildren("tile");
var viewpos = geo.aircraft_position(); # using viewpos here triggers massive tile ops for tower view...
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var code = getprop(lw~"tiles/tile[4]/code");
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var i = 0;
var d_min = 100000.0;
var i_min = 0;
var distance_to_load = getprop(lw~"config/distance-to-load-tile-m");
var distance_to_remove = getprop(lw~"config/distance-to-remove-tile-m");
var current_heading = getprop("orientation/heading-deg");
var loading_flag = getprop(lw~"tmp/asymmetric-tile-loading-flag");
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var this_frame_generated_flag = 0; # use this flag to avoid overlapping tile generation calls
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foreach (var t; tNode) {
var tpos = geo.Coord.new();
tpos.set_latlon(t.getNode("latitude-deg").getValue(),t.getNode("longitude-deg").getValue(),0.0);
var d = viewpos.distance_to(tpos);
if (d < d_min) {d_min = d; i_min = i;}
var flag = t.getNode("generated-flag").getValue();
var dir = viewpos.course_to(tpos);
var d_load = distance_to_load;
var d_remove = distance_to_remove;
if (loading_flag == 1)
{
if ((abs(dir-current_heading) > 135.0) and (abs(dir-current_heading) < 225.0))
{
d_load = 0.7 * d_load;
d_remove = 0.7 * d_remove;
}
}
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# the tile needs to be generated, unless it already has been
# and if no other tile has been generated in this loop cycle
# and the thread and convective system are idle
# (we want to avoid overlapping tile generation)
if ((d < distance_to_load) and (flag==0) and (this_frame_generated_flag == 0) and (getprop(lw~"tmp/thread-status") == "idle") and (getprop(lw~"tmp/convective-status") == "idle"))
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{
setprop(lw~"tiles/tile-counter",getprop(lw~"tiles/tile-counter")+1);
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print("Building tile unique index ",getprop(lw~"tiles/tile-counter"), " in direction ",i);
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generate_tile(code, tpos.lat(), tpos.lon(),i);
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if (getprop(lw~"config/dynamics-flag") == 1)
{
var quadtree = [];
weather_dynamics.generate_quadtree_structure(0, quadtree);
append(weather_dynamics.cloudQuadtrees,quadtree);
}
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t.getNode("generated-flag").setValue(1);
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t.getNode("timestamp-sec").setValue(weather_dynamics.time_lw);
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t.getNode("tile-index",1).setValue(getprop(lw~"tiles/tile-counter"));
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this_frame_generated_flag = 1;
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}
if ((d > distance_to_remove) and (flag==1)) # the tile needs to be deleted if it exists
{
print("Removing tile, unique index ", t.getNode("tile-index").getValue());
remove_tile(t.getNode("tile-index").getValue());
t.getNode("generated-flag").setValue(0);
}
i = i + 1;
} # end foreach
#print("Minimum distance to: ",i_min);
if (i_min != 4) # we've entered a different tile
{
print("Changing active tile to direction ", i_min);
change_active_tile(i_min);
}
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if (getprop(lw~"tile-loop-flag") ==1) {settimer(tile_management_loop, 5.0);}
}
###################################
# tile generation call
###################################
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var generate_tile = func (code, lat, lon, dir_index) {
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# make sure the last tile call has finished, otherwise put on hold
#if ((getprop(lw~"tmp/thread-status") != "idle") or (getprop(lw~"tmp/convective-status") != "idle"))
# {
# print("Tile generation overlap, delaying...");
# settimer( func {generate_tile(code, lat, lon, dir_index);}, 1);
# }
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setprop(lw~"tiles/tmp/latitude-deg", lat);
setprop(lw~"tiles/tmp/longitude-deg",lon);
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setprop(lw~"tiles/tmp/code",code);
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# do windspeed and orientation before presampling check, but test not to do it again
if (((getprop(lw~"tmp/presampling-flag") == 1) and (getprop(lw~"tmp/presampling-status") == "idle")) or (getprop(lw~"tmp/presampling-flag") == 0))
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{
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var alpha = getprop(lw~"tmp/tile-orientation-deg");
if ((local_weather.wind_model_flag == 2) or (local_weather.wind_model_flag ==4))
{
alpha = alpha + 2.0 * (rand()-0.5) * 10.0;
# account for the systematic spin of weather systems around a low pressure
# core dependent on hemisphere
if (lat >0.0) {alpha = alpha -3.0;}
else {alpha = alpha +3.0;}
setprop(lw~"tmp/tile-orientation-deg",alpha);
# compute the new windspeed
var windspeed = getprop(lw~"tmp/windspeed-kt");
windspeed = windspeed + 2.0 * (rand()-0.5) * 2.0;
if (windspeed < 0) {windspeed = rand();}
setprop(lw~"tmp/windspeed-kt");
# store the tile orientation and wind strength in an array for fast processing
append(weather_dynamics.tile_wind_direction, alpha);
append(weather_dynamics.tile_wind_speed, windspeed);
}
else if (local_weather.wind_model_flag ==5) # alpha and windspeed are calculated
{
var res = local_weather.wind_interpolation(lat,lon,0.0);
alpha = res[0];
setprop(lw~"tmp/tile-orientation-deg",alpha);
var windspeed = res[1];
setprop(lw~"tmp/windspeed-kt",windspeed);
append(weather_dynamics.tile_wind_direction,res[0]);
append(weather_dynamics.tile_wind_speed,res[1]);
}
props.globals.getNode(lw~"tiles").getChild("tile",dir_index).getNode("orientation-deg").setValue(alpha);
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}
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# now see if we need to presample the terrain
if ((getprop(lw~"tmp/presampling-flag") == 1) and (getprop(lw~"tmp/presampling-status") == "idle"))
{
local_weather.terrain_presampling_start(lat, lon, 1000, 40000, getprop(lw~"tmp/tile-orientation-deg"));
setprop(lw~"tiles/tmp/dir-index",dir_index);
return;
}
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print("Current tile type: ", code);
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if (getprop(lw~"tmp/tile-management") == "repeat tile")
{
if (code == "altocumulus_sky"){weather_tiles.set_altocumulus_tile();}
else if (code == "broken_layers") {weather_tiles.set_broken_layers_tile();}
else if (code == "stratus") {weather_tiles.set_overcast_stratus_tile();}
else if (code == "cumulus_sky") {weather_tiles.set_fair_weather_tile();}
else if (code == "gliders_sky") {weather_tiles.set_gliders_sky_tile();}
else if (code == "blue_thermals") {weather_tiles.set_blue_thermals_tile();}
else if (code == "summer_rain") {weather_tiles.set_summer_rain_tile();}
else if (code == "high_pressure_core") {weather_tiles.set_high_pressure_core_tile();}
else if (code == "high_pressure") {weather_tiles.set_high_pressure_tile();}
else if (code == "high_pressure_border") {weather_tiles.set_high_pressure_border_tile();}
else if (code == "low_pressure_border") {weather_tiles.set_low_pressure_border_tile();}
else if (code == "low_pressure") {weather_tiles.set_low_pressure_tile();}
else if (code == "low_pressure_core") {weather_tiles.set_low_pressure_core_tile();}
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else if (code == "cold_sector") {weather_tiles.set_cold_sector_tile();}
else if (code == "warm_sector") {weather_tiles.set_warm_sector_tile();}
else if (code == "tropical_weather") {weather_tiles.set_tropical_weather_tile();}
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else {print("Repeat tile not implemented with this tile type!");}
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}
else if (getprop(lw~"tmp/tile-management") == "realistic weather")
{
var rn = rand();
if (code == "low_pressure_core")
{
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if (rn > 0.2) {weather_tiles.set_low_pressure_core_tile();}
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else {weather_tiles.set_low_pressure_tile();}
}
else if (code == "low_pressure")
{
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if (rn > 0.2) {weather_tiles.set_low_pressure_tile();}
else if (rn > 0.1) {weather_tiles.set_low_pressure_core_tile();}
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else {weather_tiles.set_low_pressure_border_tile();}
}
else if (code == "low_pressure_border")
{
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if (rn > 0.4) {weather_tiles.set_low_pressure_border_tile();}
else if (rn > 0.3) {weather_tiles.set_cold_sector_tile();}
else if (rn > 0.2) {weather_tiles.set_warm_sector_tile();}
else if (rn > 0.1) {weather_tiles.set_low_pressure_tile();}
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else {weather_tiles.set_high_pressure_border_tile();}
}
else if (code == "high_pressure_border")
{
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if (rn > 0.4) {weather_tiles.set_high_pressure_border_tile();}
else if (rn > 0.3) {weather_tiles.set_cold_sector_tile();}
else if (rn > 0.2) {weather_tiles.set_warm_sector_tile();}
else if (rn > 0.1) {weather_tiles.set_high_pressure_tile();}
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else {weather_tiles.set_low_pressure_border_tile();}
}
else if (code == "high_pressure")
{
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if (rn > 0.2) {weather_tiles.set_high_pressure_tile();}
else if (rn > 0.1) {weather_tiles.set_high_pressure_border_tile();}
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else {weather_tiles.set_high_pressure_core_tile();}
}
else if (code == "high_pressure_core")
{
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if (rn > 0.2) {weather_tiles.set_high_pressure_core_tile();}
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else {weather_tiles.set_high_pressure_tile();}
}
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else if (code == "cold_sector")
{
if (rn > 0.3) {weather_tiles.set_cold_sector_tile();}
else if (rn > 0.2)
{
if ((dir_index ==0) or (dir_index ==1) or (dir_index==2))
{weather_tiles.set_warmfront1_tile();}
else if ((dir_index ==3) or (dir_index ==5))
{weather_tiles.set_cold_sector_tile();}
else if ((dir_index ==6) or (dir_index ==7) or (dir_index==8))
{weather_tiles.set_coldfront_tile();}
}
else if (rn > 0.1) {weather_tiles.set_low_pressure_border_tile();}
else {weather_tiles.set_high_pressure_border_tile();}
}
else if (code == "warm_sector")
{
if (rn > 0.3) {weather_tiles.set_warm_sector_tile();}
else if (rn > 0.2)
{
if ((dir_index ==0) or (dir_index ==1) or (dir_index==2))
{weather_tiles.set_coldfront_tile();}
else if ((dir_index ==3) or (dir_index ==5))
{weather_tiles.set_warm_sector_tile();}
else if ((dir_index ==6) or (dir_index ==7) or (dir_index==8))
{weather_tiles.set_warmfront4_tile();}
}
else if (rn > 0.1) {weather_tiles.set_low_pressure_border_tile();}
else {weather_tiles.set_high_pressure_border_tile();}
}
else if (code == "warmfront1")
{
if ((dir_index ==0) or (dir_index ==1) or (dir_index==2))
{weather_tiles.set_warmfront2_tile();}
else if ((dir_index ==3) or (dir_index ==5))
{weather_tiles.set_warmfront1_tile();}
else if ((dir_index ==6) or (dir_index ==7) or (dir_index==8))
{weather_tiles.set_cold_sector_tile();}
}
else if (code == "warmfront2")
{
if ((dir_index ==0) or (dir_index ==1) or (dir_index==2))
{weather_tiles.set_warmfront3_tile();}
if ((dir_index ==3) or (dir_index ==5))
{weather_tiles.set_warmfront2_tile();}
if ((dir_index ==6) or (dir_index ==7) or (dir_index==8))
{weather_tiles.set_warmfront1_tile();}
}
else if (code == "warmfront3")
{
if ((dir_index ==0) or (dir_index ==1) or (dir_index==2))
{weather_tiles.set_warmfront4_tile();}
if ((dir_index ==3) or (dir_index ==5))
{weather_tiles.set_warmfront3_tile();}
if ((dir_index ==6) or (dir_index ==7) or (dir_index==8))
{weather_tiles.set_warmfront2_tile();}
}
else if (code == "warmfront4")
{
if ((dir_index ==0) or (dir_index ==1) or (dir_index==2))
{weather_tiles.set_warm_sector_tile();}
if ((dir_index ==3) or (dir_index ==5))
{weather_tiles.set_warmfront4_tile();}
if ((dir_index ==6) or (dir_index ==7) or (dir_index==8))
{weather_tiles.set_warmfront3_tile();}
}
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else if (code == "coldfront")
{
if ((dir_index ==0) or (dir_index ==1) or (dir_index==2))
{weather_tiles.set_cold_sector_tile();}
else if ((dir_index ==3) or (dir_index ==5))
{weather_tiles.set_coldfront_tile();}
else if ((dir_index ==6) or (dir_index ==7) or (dir_index==8))
{weather_tiles.set_warm_sector_tile();}
}
else
{
print("Realistic weather not implemented with this tile type!");
}
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} # end if mode == realistic weather
}
###################################
# tile removal call
###################################
var remove_tile = func (index) {
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compat_layer.remove_clouds(index);
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var effectNode = props.globals.getNode("local-weather/effect-volumes").getChildren("effect-volume");
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var ecount = 0;
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foreach (var e; effectNode)
{
if (e.getNode("tile-index").getValue() == index)
{
e.remove();
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ecount = ecount + 1;
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}
}
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setprop(lw~"effect-volumes/number",getprop(lw~"effect-volumes/number")- ecount);
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# set placement indices to zero to reinitiate search for free positions
setprop(lw~"clouds/placement-index",0);
setprop(lw~"clouds/model-placement-index",0);
setprop(lw~"effect-volumes/effect-placement-index",0);
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# remove quadtree structures
if (getprop(lw~"config/dynamics-flag") ==1)
{
setsize(weather_dynamics.cloudQuadtrees[index-1],0);
}
# rebuild effect volume vector
local_weather.assemble_effect_array();
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}
###################################
# active tile change and neighbour
# recomputation
###################################
var change_active_tile = func (index) {
var t = props.globals.getNode(lw~"tiles").getChild("tile",index,0);
var lat = t.getNode("latitude-deg").getValue();
var lon = t.getNode("longitude-deg").getValue();
var alpha = getprop(lw~"tmp/tile-orientation-deg");
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if (index == 0)
{
copy_entry(4,8);
copy_entry(3,7);
copy_entry(1,5);
copy_entry(0,4);
create_neighbour(lat,lon,0,alpha);
create_neighbour(lat,lon,1,alpha);
create_neighbour(lat,lon,2,alpha);
create_neighbour(lat,lon,3,alpha);
create_neighbour(lat,lon,6,alpha);
}
else if (index == 1)
{
copy_entry(3,6);
copy_entry(4,7);
copy_entry(5,8);
copy_entry(0,3);
copy_entry(1,4);
copy_entry(2,5);
create_neighbour(lat,lon,0,alpha);
create_neighbour(lat,lon,1,alpha);
create_neighbour(lat,lon,2,alpha);
}
else if (index == 2)
{
copy_entry(4,6);
copy_entry(1,3);
copy_entry(2,4);
copy_entry(5,7);
create_neighbour(lat,lon,0,alpha);
create_neighbour(lat,lon,1,alpha);
create_neighbour(lat,lon,2,alpha);
create_neighbour(lat,lon,5,alpha);
create_neighbour(lat,lon,8,alpha);
}
else if (index == 3)
{
copy_entry(1,2);
copy_entry(4,5);
copy_entry(7,8);
copy_entry(0,1);
copy_entry(3,4);
copy_entry(6,7);
create_neighbour(lat,lon,0,alpha);
create_neighbour(lat,lon,3,alpha);
create_neighbour(lat,lon,6,alpha);
}
else if (index == 5)
{
copy_entry(1,0);
copy_entry(4,3);
copy_entry(7,6);
copy_entry(2,1);
copy_entry(5,4);
copy_entry(8,7);
create_neighbour(lat,lon,2,alpha);
create_neighbour(lat,lon,5,alpha);
create_neighbour(lat,lon,8,alpha);
}
else if (index == 6)
{
copy_entry(4,2);
copy_entry(3,1);
copy_entry(6,4);
copy_entry(7,5);
create_neighbour(lat,lon,0,alpha);
create_neighbour(lat,lon,3,alpha);
create_neighbour(lat,lon,6,alpha);
create_neighbour(lat,lon,7,alpha);
create_neighbour(lat,lon,8,alpha);
}
else if (index == 7)
{
copy_entry(3,0);
copy_entry(4,1);
copy_entry(5,2);
copy_entry(6,3);
copy_entry(7,4);
copy_entry(8,5);
create_neighbour(lat,lon,6,alpha);
create_neighbour(lat,lon,7,alpha);
create_neighbour(lat,lon,8,alpha);
}
else if (index == 8)
{
copy_entry(4,0);
copy_entry(7,3);
copy_entry(8,4);
copy_entry(5,1);
create_neighbour(lat,lon,2,alpha);
create_neighbour(lat,lon,5,alpha);
create_neighbour(lat,lon,6,alpha);
create_neighbour(lat,lon,7,alpha);
create_neighbour(lat,lon,8,alpha);
}
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}
#####################################
# copy tile info in neighbour matrix
#####################################
var copy_entry = func (from_index, to_index) {
var tNode = props.globals.getNode(lw~"tiles");
var f = tNode.getChild("tile",from_index,0);
var t = tNode.getChild("tile",to_index,0);
t.getNode("latitude-deg").setValue(f.getNode("latitude-deg").getValue());
t.getNode("longitude-deg").setValue(f.getNode("longitude-deg").getValue());
t.getNode("generated-flag").setValue(f.getNode("generated-flag").getValue());
t.getNode("tile-index").setValue(f.getNode("tile-index").getValue());
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t.getNode("code").setValue(f.getNode("code").getValue());
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t.getNode("timestamp-sec").setValue(f.getNode("timestamp-sec").getValue());
t.getNode("orientation-deg").setValue(f.getNode("orientation-deg").getValue());
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}
#####################################
# create adjacent tile coordinates
#####################################
var create_neighbour = func (blat, blon, index, alpha) {
var x = 0.0;
var y = 0.0;
var phi = alpha * math.pi/180.0;
calc_geo(blat);
if ((index == 0) or (index == 3) or (index == 6)) {x =-40000.0;}
if ((index == 2) or (index == 5) or (index == 8)) {x = 40000.0;}
if ((index == 0) or (index == 1) or (index == 2)) {y = 40000.0;}
if ((index == 6) or (index == 7) or (index == 8)) {y = -40000.0;}
var t = props.globals.getNode(lw~"tiles").getChild("tile",index,0);
t.getNode("latitude-deg",1).setValue(blat + get_lat(x,y,phi));
t.getNode("longitude-deg",1).setValue(blon + get_lon(x,y,phi));
t.getNode("generated-flag",1).setValue(0);
t.getNode("tile-index",1).setValue(-1);
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t.getNode("code",1).setValue("");
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t.getNode("timestamp-sec",1).setValue(weather_dynamics.time_lw);
t.getNode("orientation-deg",1).setValue(0.0);
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}
#####################################
# find the 8 adjacent tile coordinates
# after the initial setup call
#####################################
var create_neighbours = func (blat, blon, alpha) {
var x = 0.0;
var y = 0.0;
var phi = alpha * math.pi/180.0;
calc_geo(blat);
x = -40000.0; y = 40000.0;
setprop(lw~"tiles/tile[0]/latitude-deg",blat + get_lat(x,y,phi));
setprop(lw~"tiles/tile[0]/longitude-deg",blon + get_lon(x,y,phi));
setprop(lw~"tiles/tile[0]/generated-flag",0);
setprop(lw~"tiles/tile[0]/tile-index",-1);
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setprop(lw~"tiles/tile[0]/code","");
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setprop(lw~"tiles/tile[0]/timestamp-sec",weather_dynamics.time_lw);
setprop(lw~"tiles/tile[0]/orientation-deg",0.0);
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x = 0.0; y = 40000.0;
setprop(lw~"tiles/tile[1]/latitude-deg",blat + get_lat(x,y,phi));
setprop(lw~"tiles/tile[1]/longitude-deg",blon + get_lon(x,y,phi));
setprop(lw~"tiles/tile[1]/generated-flag",0);
setprop(lw~"tiles/tile[1]/tile-index",-1);
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setprop(lw~"tiles/tile[1]/code","");
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setprop(lw~"tiles/tile[1]/timestamp-sec",weather_dynamics.time_lw);
setprop(lw~"tiles/tile[1]/orientation-deg",0.0);
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x = 40000.0; y = 40000.0;
setprop(lw~"tiles/tile[2]/latitude-deg",blat + get_lat(x,y,phi));
setprop(lw~"tiles/tile[2]/longitude-deg",blon + get_lon(x,y,phi));
setprop(lw~"tiles/tile[2]/generated-flag",0);
setprop(lw~"tiles/tile[2]/tile-index",-1);
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setprop(lw~"tiles/tile[2]/code","");
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setprop(lw~"tiles/tile[2]/timestamp-sec",weather_dynamics.time_lw);
setprop(lw~"tiles/tile[2]/orientation-deg",0.0);
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x = -40000.0; y = 0.0;
setprop(lw~"tiles/tile[3]/latitude-deg",blat + get_lat(x,y,phi));
setprop(lw~"tiles/tile[3]/longitude-deg",blon + get_lon(x,y,phi));
setprop(lw~"tiles/tile[3]/generated-flag",0);
setprop(lw~"tiles/tile[3]/tile-index",-1);
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setprop(lw~"tiles/tile[3]/code","");
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setprop(lw~"tiles/tile[3]/timestamp-sec",weather_dynamics.time_lw);
setprop(lw~"tiles/tile[3]/orientation-deg",0.0);
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# this is the current tile
x = 0.0; y = 0.0;
setprop(lw~"tiles/tile[4]/latitude-deg",blat + get_lat(x,y,phi));
setprop(lw~"tiles/tile[4]/longitude-deg",blon + get_lon(x,y,phi));
setprop(lw~"tiles/tile[4]/generated-flag",1);
setprop(lw~"tiles/tile[4]/tile-index",1);
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setprop(lw~"tiles/tile[4]/code","");
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setprop(lw~"tiles/tile[4]/timestamp-sec",weather_dynamics.time_lw);
setprop(lw~"tiles/tile[4]/orientation-deg",getprop(lw~"tmp/tile-orientation-deg"));
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x = 40000.0; y = 0.0;
setprop(lw~"tiles/tile[5]/latitude-deg",blat + get_lat(x,y,phi));
setprop(lw~"tiles/tile[5]/longitude-deg",blon + get_lon(x,y,phi));
setprop(lw~"tiles/tile[5]/generated-flag",0);
setprop(lw~"tiles/tile[5]/tile-index",-1);
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setprop(lw~"tiles/tile[5]/code","");
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setprop(lw~"tiles/tile[5]/timestamp-sec",weather_dynamics.time_lw);
setprop(lw~"tiles/tile[5]/orientation-deg",0.0);
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x = -40000.0; y = -40000.0;
setprop(lw~"tiles/tile[6]/latitude-deg",blat + get_lat(x,y,phi));
setprop(lw~"tiles/tile[6]/longitude-deg",blon + get_lon(x,y,phi));
setprop(lw~"tiles/tile[6]/generated-flag",0);
setprop(lw~"tiles/tile[6]/tile-index",-1);
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setprop(lw~"tiles/tile[6]/code","");
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setprop(lw~"tiles/tile[6]/timestamp-sec",weather_dynamics.time_lw);
setprop(lw~"tiles/tile[6]/orientation-deg",0.0);
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x = 0.0; y = -40000.0;
setprop(lw~"tiles/tile[7]/latitude-deg",blat + get_lat(x,y,phi));
setprop(lw~"tiles/tile[7]/longitude-deg",blon + get_lon(x,y,phi));
setprop(lw~"tiles/tile[7]/generated-flag",0);
setprop(lw~"tiles/tile[7]/tile-index",-1);
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setprop(lw~"tiles/tile[7]/code","");
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setprop(lw~"tiles/tile[7]/timestamp-sec",weather_dynamics.time_lw);
setprop(lw~"tiles/tile[7]/orientation-deg",0.0);
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x = 40000.0; y = -40000.0;
setprop(lw~"tiles/tile[8]/latitude-deg",blat + get_lat(x,y,phi));
setprop(lw~"tiles/tile[8]/longitude-deg",blon + get_lon(x,y,phi));
setprop(lw~"tiles/tile[8]/generated-flag",0);
setprop(lw~"tiles/tile[8]/tile-index",-1);
2010-06-15 18:54:44 +00:00
setprop(lw~"tiles/tile[8]/code","");
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setprop(lw~"tiles/tile[8]/timestamp-sec",weather_dynamics.time_lw);
setprop(lw~"tiles/tile[8]/orientation-deg",0.0);
2010-06-04 21:05:32 +00:00
}
###################
# global variables
###################
# these already exist in different namespace, but for ease of typing we define them here as well
var lat_to_m = 110952.0; # latitude degrees to meters
var m_to_lat = 9.01290648208234e-06; # meters to latitude degrees
var ft_to_m = 0.30480;
var m_to_ft = 1.0/ft_to_m;
var inhg_to_hp = 33.76389;
var hp_to_inhg = 1.0/inhg_to_hp;
var lon_to_m = 0.0; #local_weather.lon_to_m;
var m_to_lon = 0.0; # local_weather.m_to_lon;
var lw = "/local-weather/";
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var modelArrays = [];
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###################
# helper functions
###################
var calc_geo = func(clat) {
lon_to_m = math.cos(clat*math.pi/180.0) * lat_to_m;
m_to_lon = 1.0/lon_to_m;
}
var get_lat = func (x,y,phi) {
return (y * math.cos(phi) - x * math.sin(phi)) * m_to_lat;
}
var get_lon = func (x,y,phi) {
return (x * math.cos(phi) + y * math.sin(phi)) * m_to_lon;
}
