= A Practical Application in [[Flightgear]] =
== ALS Landing Lights ==
[[File:als secondary light.png|640px|thumbnail|Proof of Concept]]
The ALS Landing Lights
/Spotlight is a good example for showing how to incorporate a shader effect into [[Flightgear]] as it touches many parts of the visuals we see and many parts of the coding pipeline.
===Program Flow Simplified===
Parameter entries defined in the Effect file correspond to a property tree data container (static or variable). They will contain the data needed by the shader program to perform its magic. The type of information contained in the property tree might be program control data or variable/static data that the shader program can manipulate prior to sending on to render.
In the case of