# Findosg

Finds the core OpenSceneGraph osg library (`libosg`).

Note

In most cases, it's recommended to use the `FindOpenSceneGraph` module instead, which automatically finds the osg core library along with its required dependencies like OpenThreads:

    find_package(OpenSceneGraph)

This module is used internally by `FindOpenSceneGraph` to find the osg library. It is not intended to be included directly during typical use of the `find_package()` command. However, it is available as a standalone module for advanced use cases where finer control over detection is needed, such as explicitly finding osg library or bypassing automatic component detection:

    find_package(osg)

OpenSceneGraph core library headers are intended to be included in C++ project source code as:

`example.cxx`

    #include <osg/PositionAttitudeTransform>

When working with the OpenSceneGraph toolkit, other libraries such as OpenGL may also be required.

## Result Variables

This module defines the following variables:

`osg_FOUND`

  Boolean indicating whether osg library is found. For backward compatibility, the `OSG_FOUND` variable is also set to the same value.

`OSG_LIBRARIES`

  The libraries needed to link against to use osg library.

`OSG_LIBRARY`

  A result variable that is set to the same value as the `OSG_LIBRARIES` variable.

## Cache Variables

The following cache variables may also be set:

`OSG_INCLUDE_DIR`

  The include directory containing headers needed to use osg library.

`OSG_LIBRARY_DEBUG`

  The path to the osg debug library.

## Hints

This module accepts the following variables:

`OSGDIR`

  Environment variable that can be set to help locate the OpenSceneGraph toolkit, including its osg library, when installed in a custom location. It should point to the OpenSceneGraph installation prefix used when it was configured, built, and installed: `./configure --prefix=$OSGDIR`.

## Examples

Finding the osg library explicitly with this module and creating an interface imported target that encapsulates its usage requirements for linking it to a project target:

    find_package(osg)

    if(osg_FOUND AND NOT TARGET osg::osg)
      add_library(osg::osg INTERFACE IMPORTED)
      set_target_properties(
        osg::osg
        PROPERTIES
          INTERFACE_INCLUDE_DIRECTORIES "${OSG_INCLUDE_DIR}"
          INTERFACE_LINK_LIBRARIES "${OSG_LIBRARIES}"
      )
    endif()

    target_link_libraries(example PRIVATE osg::osg)

## See Also

- The `FindOpenSceneGraph` module to find OpenSceneGraph toolkit.