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Snow: Difference between revisions
Update with screenshots showing modern snow controls
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[[File: | [[File:Bell_412_over_a_snowcapped_Mount_Etna_in_Sicily_in_winter_(Flightgear_2019.x)_02.jpg|thumb|270px|Patchy snow lit by golden light from a low sun]] | ||
[[File:SOTM_2018-11_Morning_Mountain_flight_by_StuartC.jpg|thumb|270px|Snow in mountains - snow accumulates more on less steep slope surfaces, including roofs of houses and buildings (Flightgear 2018.x)]] | |||
As of [[FlightGear]] 2.6.0, the '''snow line''' is based on a user selectable elevation (<tt>Environment > Global Weather</tt> dialog) and the nearest [[METAR]] station's report. If the METAR reports snow and the station is below the level set by the user, the snow line will be set to the station's altitude. | As of [[FlightGear]] 2.6.0, the '''snow line''' is based on a user selectable elevation (<tt>Environment > Global Weather</tt> dialog) and the nearest [[METAR]] station's report. If the METAR reports snow and the station is below the level set by the user, the snow line will be set to the station's altitude. | ||
Although this is better than the former behaviour (only user setting), it's still not realistic. The purpose of this document is to collect ideas and info on how to automate the snow line calculations. | |||
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== Snow line == | == Snow line == | ||
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* [[#Climatic|Climatic]]: the point above which snow and ice cover the ground throughout the year.<ref>[http://en.wikipedia.org/wiki/Snow_line Snow line] (Wikipedia)</ref> | * [[#Climatic|Climatic]]: the point above which snow and ice cover the ground throughout the year.<ref>[http://en.wikipedia.org/wiki/Snow_line Snow line] (Wikipedia)</ref> | ||
* [[#Actual|Actual]]: the actual point at which snow is currently present. In summer, this is often equal to the climatic snow line. | * [[#Actual|Actual]]: the actual point at which snow is currently present. In summer, this is often equal to the climatic snow line. | ||
[[File:SOTM_2019-06_Ice_and_fire_by_vnts.jpg|thumb|center|700px|The snow line on Mt Etna in winter. Note the gradual transition. The snow thickness was turned down as shown by the slightly patchy or dirty look. The snow deposits on trees are determined by the season slider (Flightgear 2018)]] | |||
=== Climatic === | === Climatic === | ||