cmake OSG examples

fzi-forschungszentrum-informatik/gpu-voxels icmaker/CorePackages.cmake :144 

FIND_PACKAGE(osg)

PDAL/PDAL cmake/openscenegraph.cmake :5 

find_package(OSG QUIET REQUIRED)

joschu/trajopt src/osgviewer/CMakeLists.txt :3 

find_package( osg )

delta3d/delta3d CMakeLists.txt :230 

FIND_PACKAGE(OSG REQUIRED)