This is part of the Findosg* suite used to find OpenSceneGraph components. Each component is separate and you must opt in to each module. You must also opt into OpenGL and OpenThreads (and Producer if needed) as these modules won't do it for you. This is to allow you control over your own system piece by piece in case you need to opt out of certain components or change the Find behavior for a particular module (perhaps because the default FindOpenGL module doesn't work with your system as an example). If you want to use a more convenient module that includes everything, use the FindOpenSceneGraph instead of the Findosg*.cmake modules.
Locate osgTerrain This module defines:
OSGTERRAIN_FOUND Was osgTerrain found?
OSGTERRAIN_INCLUDE_DIR Where to find the headers
OSGTERRAIN_LIBRARIES The libraries to link for osgTerrain (use this)
OSGTERRAIN_LIBRARY The osgTerrain library
OSGTERRAIN_LIBRARY_DEBUG The osgTerrain debug library
$OSGDIR is an environment variable that would correspond to:
./configure --prefix=$OSGDIR
used in building osg.
Created by Eric Wing.
© 2000–2024 Kitware, Inc. and Contributors
Licensed under the BSD 3-clause License.
https://cmake.org/cmake/help/v3.31/module/FindosgTerrain.html