Building Open3D as a git submodule

cd d:\OberserverPattern
git submodule add https://github.com/isl-org/Open3D.git Open3D
git submodule update --init --recursive
cd .\Open3D\
mkdir build
cd .\build\
cmake -G "Visual Studio 17 2022" -A x64 -DCMAKE_INSTALL_PREFIX="<open3d_install_directory>" ..
cmake --build . --config Release --target ALL_BUILD

More information

https://www.open3d.org/docs/release/compilation.html