CMake error

[ncrasta]

When I try to build it on ubuntu 18.04, I get the following error. Any suggestion to fix it? Thanks.

CMake Error at /usr/share/cmake-3.10/Modules/FindPackageHandleStandardArgs.cmake:137 (message):
Could NOT find osg (missing: OSG_LIBRARY OSG_INCLUDE_DIR)
Call Stack (most recent call first):
/usr/share/cmake-3.10/Modules/FindPackageHandleStandardArgs.cmake:378 (_FPHSA_FAILURE_MESSAGE)
/usr/share/cmake-3.10/Modules/Findosg.cmake:50 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
CMakeLists.txt:26 (find_package)

-- Configuring incomplete, errors occurred!

[as-flow]

Looks like cmake isn't able to find the OpenSceneGraph build location.
Try doing cmake -DCMAKE_SYSTEM_PREFIX_PATH=<path to osg>