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Tentative improvements to AW gust modeling

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Thorsten Renk 2015-11-16 17:41:57 +02:00
parent 9020bda565
commit 04524c0cca
5 changed files with 109 additions and 26 deletions
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2
Environment/local-weather-defaults.xml
View file

@ -19,6 +19,7 @@
<detailed-terrain-interaction-flag type="bool" userarchive="y">0</detailed-terrain-interaction-flag>
<realistic-visibility-flag type="bool" userarchive="y">0</realistic-visibility-flag>
<thread-flag type="bool" userarchive="n">1</thread-flag>
<turbulence-scale type="double" userarchive="y">1.0</turbulence-scale>
<presampling-flag type="bool" userarchive="y">1</presampling-flag>
<fps-control-flag type="bool" userarchive="y">0</fps-control-flag>
<target-framerate type="double" userarchive="y">25.0</target-framerate>
@ -37,6 +38,7 @@
<gust-frequency-hz type="double" userarchive="n">0.0</gust-frequency-hz>
<gust-relative-strength type="double" userarchive="n">0.0</gust-relative-strength>
<gust-angular-variation-deg type="double" userarchive="n">0.0</gust-angular-variation-deg>
<squall-scaling-norm type="double" userarchive="n">1.0</squall-scaling-norm>
<tile-alt-offset-ft type="double" userarchive="n">0.0</tile-alt-offset-ft>
<asymmetric-tile-loading-flag type="bool" userarchive="y">0</asymmetric-tile-loading-flag>
<FL0-wind-from-heading-deg type="double" userarchive="y">260.0</FL0-wind-from-heading-deg>

24
Nasal/local_weather/compat_layer.nas
View file

@ -286,7 +286,9 @@ setprop("/environment/precipitation-control/snow-flake-size", size);
var setTurbulence = func (turbulence) {
setprop("/environment/turbulence/magnitude-norm",turbulence);
var turbulence_scale = getprop("/local-weather/config/turbulence-scale");
setprop("/environment/turbulence/magnitude-norm",turbulence * turbulence_scale);
setprop("/environment/turbulence/rate-hz",3.0);
}
@ -415,10 +417,28 @@ setprop("/environment/clouds/layer[0]/elevation-ft",0.0);
# interpolating across several frames
###########################################################
var smoothDirection = func (dir0, dir1, factor) {
var diff = ( math.mod( dir0 - dir1 + 180 + 360, 360 ) - 180 );
diff *= factor;
return math.mod( 360 + dir1 + ( diff / 2), 360);
}
var setWindSmoothly = func (dir, speed) {
setWind(dir, speed);
var curDir = getprop("/environment/wind-from-heading-deg");
var curSpeed = getprop("/environment/wind-speed-kt");
dir = math.mod(dir, 360);
var newSpeed = (curSpeed * 9 + speed) / 10;
var newDir = smoothDirection(dir, curDir, 0.2);
setWind(newDir, newSpeed);
#setWind(dir, speed);
}

19
Nasal/local_weather/local_weather.nas
View file

@ -926,13 +926,30 @@ if (gust_frequency > 0.0)
# expected mean number of gusts in time interval (should be < 1)
var p_gust = gust_frequency * interpolation_loop_time;
# real time series show a ~10-30 second modulation as well
var p_squall = gust_frequency * 0.1 * interpolation_loop_time;
var squall_scale = getprop("/local-weather/tmp/squall-scaling-norm");
if (rand() < p_squall)
{
squall_scale = rand();
# prefer large changes
if ((squall_scale > 0.3) and (squall_scale < 0.7))
{squall_scale = rand();}
setprop("/local-weather/tmp/squall-scaling-norm", squall_scale);
}
winddir_change = 0.0;
if (rand() < p_gust) # we change the offsets for windspeed and direction
{
var alt_fact = 1.0 - altitude_agl/(boundary_alt * alt_scaling_factor);
if (alt_fact < 0.0) {alt_fact = 0.0};
windspeed_multiplier = (1.0 + ((rand()) * gust_relative_strength * alt_fact));
var random_factor = 0.3 * rand() + 0.7 * squall_scale;
windspeed_multiplier = (1.0 + (random_factor * gust_relative_strength * alt_fact));
winddir_change = alt_fact * (1.0 - 2.0 * rand()) * gust_angvar;
winddir_change = winddir_change * 0.2; # Markov chain parameter, max. change per frame is 1/5

15
Nasal/local_weather/weather_tile_management.nas
View file

@ -1493,7 +1493,14 @@ settimer( func {shadow_management_loop(i)}, 0);
var watchdog_loop = func {
var tNode = props.globals.getNode(lw~"tiles", 1).getChildren("tile");
var winddir = getprop("/environment/wind-from-heading-deg");
var windspeed = getprop("/environment/wind-speed-kt");
print (windspeed, " ", winddir);
if (0==1)
{var tNode = props.globals.getNode(lw~"tiles", 1).getChildren("tile");
var i = 0;
@ -1536,6 +1543,8 @@ for (var i = 0; i < wsize; i=i+1) {
}
print("dir_int: ", sum_wind[0], " speed_int: ", sum_wind[1]/sum_norm);
}
if (0==1)
{
@ -1589,9 +1598,9 @@ print("Mismatch: ", relangle(res[0], getprop(lw~"tiles/tile[4]/orientation-deg")
}
print("====================");
#print("====================");
settimer(watchdog_loop, 10.0);
settimer(watchdog_loop, 4.0);
}

67
gui/dialogs/local_weather_tiles.xml
View file

@ -214,7 +214,7 @@
<col>1</col>
<halign>fill</halign>
<min>0.0</min>
<max>2.0</max>
<max>1.0</max>
<property>/local-weather/tmp/gust-frequency-hz</property>
<binding>
<command>dialog-apply</command>
@ -441,23 +441,58 @@
<label>low convection</label>
</text>
<text>
<row>3</row>
<col>0</col>
<halign>right</halign>
<label>Ground Haze:</label>
<label> Turbulence:</label>
</text>
<text>
<row>3</row>
<col>1</col>
<halign>right</halign>
<label>thick</label>
<label>weak</label>
</text>
<slider>
<row>3</row>
<col>2</col>
<min>0.0</min>
<max>1.5</max>
<property>/local-weather/config/turbulence-scale</property>
<binding>
<command>dialog-apply</command>
</binding>
</slider>
<text>
<row>3</row>
<col>3</col>
<halign>left</halign>
<label>strong</label>
</text>
<text>
<row>4</row>
<col>0</col>
<halign>right</halign>
<label>Ground Haze:</label>
</text>
<text>
<row>4</row>
<col>1</col>
<halign>right</halign>
<label>thick</label>
</text>
<slider>
<row>4</row>
<col>2</col>
<min>0.1</min>
<max>1.0</max>
<property>/local-weather/config/ground-haze-factor</property>
@ -467,28 +502,28 @@
</slider>
<text>
<row>3</row>
<row>4</row>
<col>3</col>
<halign>left</halign>
<label>thin</label>
</text>
<text>
<row>4</row>
<row>5</row>
<col>0</col>
<halign>right</halign>
<label>Air Pollution:</label>
</text>
<text>
<row>4</row>
<row>5</row>
<col>1</col>
<halign>right</halign>
<label>clean</label>
</text>
<slider>
<row>4</row>
<row>5</row>
<col>2</col>
<min>0.0</min>
<max>1.0</max>
@ -499,28 +534,28 @@
</slider>
<text>
<row>4</row>
<row>5</row>
<col>3</col>
<halign>left</halign>
<label>smog</label>
</text>
<text>
<row>5</row>
<row>6</row>
<col>0</col>
<halign>right</halign>
<label>Fog Properties:</label>
</text>
<text>
<row>5</row>
<row>6</row>
<col>1</col>
<halign>right</halign>
<label>smooth</label>
</text>
<slider>
<row>5</row>
<row>6</row>
<col>2</col>
<min>0.0</min>
<max>12.0</max>
@ -531,14 +566,14 @@
</slider>
<text>
<row>5</row>
<row>6</row>
<col>3</col>
<halign>left</halign>
<label>structured</label>
</text>
<text>
<row>6</row>
<row>7</row>
<col>0</col>
<halign>right</halign>
<!--<enable>
@ -551,14 +586,14 @@
</text>
<text>
<row>6</row>
<row>7</row>
<col>1</col>
<halign>right</halign>
<label>20 km</label>
</text>
<slider>
<row>6</row>
<row>7</row>
<col>2</col>
<!--<enable>
<equals>
@ -575,7 +610,7 @@
</slider>
<text>
<row>6</row>
<row>7</row>
<col>3</col>
<halign>left</halign>
<!--<enable>