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add layman's description from the forum: https://forum.flightgear.org/viewtopic.php?p=353286#p353286
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The OSGText animation (README.osgtext) doesn't play nice with shaders.<ref>https://forum.flightgear.org/viewtopic.php?f=87&t=37429&p=376110#p376110</ref> | |||
The problem looks to be the known OSGText coloration problem seen with newer versions of OSG... OSG changed the way that it does the colors and the old OpenGL style is no longer used by OSG... FG simply hasn't kept up with all the changes in OSG... this problem has been around since i came to the project 4 or so years back... none of the devs have had the time to refactor the way FG handles OSGText so here we are... someone will get to it one day... for now the main project uses an older version of OSG with the breaking commit reverted... the PPA does not and neither do most of us building our own binaries..<ref>https://forum.flightgear.org/viewtopic.php?p=353286#p353286</ref> | |||
So we need to do some Real Work (TM) to support Canvas with osgText 3.6 and upwards, unfortunately.<ref>https://sourceforge.net/p/flightgear/mailman/message/36730965/</ref> | |||
Currently, osgText doesn't work under the ALS pipeline. That's a big issue for someone wanting to fly an airliner that uses osgText (to the point of being practically unflyable). It's not a breaking change for other developers, but it is for someone wanting to actually use the simulator. That should be the most important criteria when judging if something goes on next.<ref>https://sourceforge.net/p/flightgear/mailman/message/37042335/</ref> | |||
Some aircraft developers have switched to canvas /because/ of the always white OSGText problem<ref>https://sourceforge.net/p/flightgear/mailman/message/36731025/</ref> | |||
The OSGText issue is more that the world is moving forwards, and our text-animation element has not. (Shaders required, can’t rely on OpenGL 1.1 built-in lighting)<ref>https://sourceforge.net/p/flightgear/mailman/message/36731031/</ref> | The OSGText issue is more that the world is moving forwards, and our text-animation element has not. (Shaders required, can’t rely on OpenGL 1.1 built-in lighting)<ref>https://sourceforge.net/p/flightgear/mailman/message/36731031/</ref> | ||