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In FlightGear, many shaders are used through the so called "effects" framework, to learn more about that, see $FG_ROOT/Docs/README.effects | In FlightGear, many shaders are used through the so called "effects" framework, to learn more about that, see $FG_ROOT/Docs/README.effects | ||
GLSL shaders are compiled 'as needed' - a bit simplified, the very frame an object using a shader (at your current quality level setting) comes into view the shader is compiled. | |||
(Which, incidentially, is why definitions are repeated in any shader - each shader must be a standalone object because it can't rely on other shaders being compiled or running or exchanging information. GLSL is basically the most parallel processing environment you can thing of where no part of the ongoing computation talks much to any other - one pixel doesn't know what any other pixel does) | |||
effects can be used, edited and customized even without understanding GLSL - those are just XML files, see README.effects in $FG_ROOT/Docs | effects can be used, edited and customized even without understanding GLSL - those are just XML files, see README.effects in $FG_ROOT/Docs | ||