Launching the Unreal Engine view client

Navigate to:

sdk-folder/Samples/PathfindingSample/tools/cloud

1. Run one of the following commands:

   • Docker: python quick-start.py

   • WSL: python quick-start.py --al2

2. Get the IP address and “Actual” port number. These will be in the console output from running quick-start.py, or get them by following the procedures at Get the IP address and port number of a custom app.

3. Navigate to:

   sdk-folder/Clients/TCP/UnrealClient/lib

4. Run the following commands to build the NNG library:

   cmake -S . -B build 
   cmake --build build --config RelWithDebInfo 
   cmake --install build

5. In a text editor, open view_app_url.txt.

6. Update the URL with the IP address and port number for your view app: tcp://ip-address:actual-port-number (it should look like tcp://198.51.100.135:1234).

7. In Unreal editor, choose play.

Troubleshooting

• NNG CMake install step fails with “Maybe need administrative privileges“:

  CMake Error at build/_deps/nng-build/src/cmake_install.cmake:39 (file):
    file cannot create directory: C:/Program Files
    (x86)/ThirdPartyNngBuild/lib.  Maybe need administrative privileges.
  Call Stack (most recent call first):
    build/_deps/nng-build/cmake_install.cmake:37 (include)
    build/cmake_install.cmake:73 (include)

  • Resolution: If nng.lib or nng.so exist in the UnrealClient/lib directory, this error can be safely ignored. If not, then try running the cmake build commands in a terminal with administrator privileges.

• “CMake to find a package configuration file provided by nng”:

  CMake Error at CMakeLists.txt:23 (find_package):
  By not providing "Findnng.cmake" in CMAKE_MODULE_PATH this project has
   asked CMake to find a package configuration file provided by "nng", but
   CMake did not find one.

  • Resolution: CMake is having trouble finding the Findnng.cmake file. When building with CMake, add the argument -DTHIRD_PARTY_LIB_PATH sdk-folder/ThirdParty. Ensure the Findnng.cmake file is still in the ThirdParty directory before rerunning the CMake build.

    cmake -S . -B build -DTHIRD_PARTY_LIB_PATH sdk-folder/ThirdParty
    cmake --build build --config RelWithDebInfo 
    cmake --install build