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Howto:Shader programming in FlightGear: Difference between revisions
Howto:Shader programming in FlightGear (view source)
Revision as of 22:01, 12 October 2014
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===Preferences/Nasal/XML=== | ===Preferences/Nasal/XML=== | ||
{{Note|need link to Preferences, Nasal and XML Docs here}} | |||
Any combination of Preferences, Nasal or XML manipulates data in the property tree. | Any combination of Preferences, Nasal or XML manipulates data in the property tree. | ||
In this case the switch to turn on the landing or spot light and a couple other needed data containers are defined in $FG_ROOT/preferences.xml with the following lines. | In this case the switch to turn on the landing or spot light and a couple other needed data containers are defined in $FG_ROOT/preferences.xml with the following lines. | ||
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<landing-light2-offset-deg type="float">0.0</landing-light2-offset-deg> | <landing-light2-offset-deg type="float">0.0</landing-light2-offset-deg> | ||
</als-secondary-lights> | </als-secondary-lights> | ||
They show up in the Property Tree under sim/rendering/als-secondary-lights and can be activated or manipulated by normal Nasal calls or XML. | |||
===Effects File=== | ===Effects File=== | ||
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<tquality_level><use>/sim/rendering/shaders/transition</use></tquality_level> | <tquality_level><use>/sim/rendering/shaders/transition</use></tquality_level> | ||
</small> | </small> | ||
Note the "use-searchlight" entry, it is pointing to the use-searchlight entry in the property tree under "sim/rendering/als-secondary-lights" that was defined in preferences.xml. | |||
Some of this data may play a duel role inside the shader program. In other words it might be used to control other functions in addition to ALS Lights. | Some of this data may play a duel role inside the shader program. In other words it might be used to control other functions in addition to ALS Lights. | ||