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FlightGear Newsletter August 2015: Difference between revisions
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FlightGear Newsletter August 2015 (view source)
Revision as of 17:42, 11 August 2015
, 11 August 2015→Atmospheric Light Scattering
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=== Atmospheric Light Scattering === | === Atmospheric Light Scattering === | ||
==== Thunderstorms ==== | |||
In combination with Advanced Weather, ALS now simulates the flashes of lightning illuminating clouds at night during a thunderstorm. The simulation keeps track of all thunderstorms inside the field of view and generates a changing pattern of lightning strikes with variable frequency. | |||
[[File:Lightning04.jpg|600px|Lightning strike]] | |||
At night, dependent on the intensity of the lightning bolt, clouds in a distance of up to 20 kilometers may light up, giving rather stunning visuals of massive clouds suddenly torn out of the darkness. | |||
[[File:Lightning05.jpg|600px|Clouds illuminate at night]] | |||
Since the simulation writes the position of the lightning strike relative to the current eye position into the property tree (/environment/lightning/lightning-pos-x and /environment/lightning/lightning-pos-y), aircraft modelers can use this information as a timing signal to trigger a thunder ambience sound after the sound speed delay. | |||
The lightning bolt simulation will work without ALS, but clouds and rain will not be illuminated. | |||
==== Irradiance maps ==== | ==== Irradiance maps ==== | ||