#概要
この記事はUE4でVSCodeを使おうとしてIntellisenseがうまく働かず挫折した人たちへの記事です。
#導入
UE4におけるVSCodeの導入に関しては先人の素晴らしい記事があるので参考にしてみてください。
UE4 Visual StudioなしでVisual Studio CodeからC++プロジェクトを実行する
【UE4】MacからVSCodeを用いてUE4プロジェクトをビルド・デバッグをする方法
Visual Stadio 2019のものでインストールしましたが、大差ありませんでした。
#挫折
さて、上記の導入方法に従ってVSCodeを立ち上げたはいいものの、
IntelliSenseくんが一向にコード補完を行ってくれないという現象にぶつかった方は少なくないのではないでしょうか。
自分もかく言うその一人で、結局VSCodeによるC++開発を諦めるに至りました（だからUE4 C++の記事少ないんじゃないかと思っています…。
具体的には以下のようになります。
上記の画像ではFVector::ZeroVectorが表示されてくれません。
こんな感じで欲しいメソッドや定数が補完候補に表示されなかったりします。
他にも#include部分に警告が出てパスを追加しても解決しなかったり、ということもあると思います。
#対処法
対処法としてプロジェクト直下の.vscodeフォルダにあるc_cpp_properties.jsonの"configurations"に以下の記述を追加してください。
"defines": [
"IS_PROGRAM=0",
"UE_EDITOR=1",
"ENABLE_PGO_PROFILE=0",
"USE_VORBIS_FOR_STREAMING=1",
"USE_XMA2_FOR_STREAMING=1",
"WITH_DEV_AUTOMATION_TESTS=1",
"WITH_PERF_AUTOMATION_TESTS=1",
"UNICODE",
"_UNICODE",
"__UNREAL__",
"IS_MONOLITHIC=0",
"WITH_ENGINE=1",
"WITH_UNREAL_DEVELOPER_TOOLS=1",
"WITH_APPLICATION_CORE=1",
"WITH_COREUOBJECT=1",
"USE_STATS_WITHOUT_ENGINE=0",
"WITH_PLUGIN_SUPPORT=0",
"WITH_ACCESSIBILITY=1",
"WITH_PERFCOUNTERS=1",
"USE_LOGGING_IN_SHIPPING=0",
"WITH_LOGGING_TO_MEMORY=0",
"USE_CACHE_FREED_OS_ALLOCS=1",
"USE_CHECKS_IN_SHIPPING=0",
"WITH_EDITOR=1",
"WITH_SERVER_CODE=1",
"WITH_CEF3=1",
"WITH_LIVE_CODING=1",
"WITH_XGE_CONTROLLER=1",
"UBT_MODULE_MANIFEST=\"UE4Editor.modules\"",
"UBT_MODULE_MANIFEST_DEBUGGAME=\"UE4Editor-Win64-DebugGame.modules\"",
"UBT_COMPILED_PLATFORM=Win64",
"UBT_COMPILED_TARGET=Editor",
"UE_APP_NAME=\"UE4Editor\"",
"NDIS_MINIPORT_MAJOR_VERSION=0",
"WIN32=1",
"_WIN32_WINNT=0x0601",
"WINVER=0x0601",
"PLATFORM_WINDOWS=1",
"OVERRIDE_PLATFORM_HEADER_NAME=Windows",
"NDEBUG=1",
"UE_BUILD_DEVELOPMENT=1",
"UE_IS_ENGINE_MODULE=0",
"IMPLEMENT_ENCRYPTION_KEY_REGISTRATION()=",
"IMPLEMENT_SIGNING_KEY_REGISTRATION()=",
"DEPRECATED_FORGAME=DEPRECATED",
"UE_DEPRECATED_FORGAME=UE_DEPRECATED",
"INCLUDE_CHAOS=0",
"WITH_PHYSX=1",
"WITH_CHAOS=0",
"WITH_CHAOS_CLOTHING=0",
"WITH_CHAOS_NEEDS_TO_BE_FIXED=0",
"PHYSICS_INTERFACE_PHYSX=1",
"WITH_APEX=1",
"WITH_APEX_CLOTHING=1",
"WITH_CLOTH_COLLISION_DETECTION=1",
"WITH_PHYSX_COOKING=1",
"WITH_NVCLOTH=1",
"WITH_CUSTOM_SQ_STRUCTURE=0",
"WITH_IMMEDIATE_PHYSX=0",
"GPUPARTICLE_LOCAL_VF_ONLY=0",
"ENGINE_VTABLE=DLLIMPORT_VTABLE",
"ENGINE_API=",
"UE_ENABLE_ICU=1",
"WITH_VS_PERF_PROFILER=0",
"WITH_DIRECTXMATH=0",
"WITH_MALLOC_STOMP=1",
"CORE_VTABLE=DLLIMPORT_VTABLE",
"CORE_API=",
"TRACELOG_VTABLE=DLLIMPORT_VTABLE",
"TRACELOG_API=",
"COREUOBJECT_VTABLE=DLLIMPORT_VTABLE",
"COREUOBJECT_API=",
"NETCORE_VTABLE=DLLIMPORT_VTABLE",
"NETCORE_API=",
"APPLICATIONCORE_VTABLE=DLLIMPORT_VTABLE",
"APPLICATIONCORE_API=",
"RHI_VTABLE=DLLIMPORT_VTABLE",
"RHI_API=",
"JSON_VTABLE=DLLIMPORT_VTABLE",
"JSON_API=",
"WITH_FREETYPE=1",
"SLATECORE_VTABLE=DLLIMPORT_VTABLE",
"SLATECORE_API=",
"INPUTCORE_VTABLE=DLLIMPORT_VTABLE",
"INPUTCORE_API=",
"SLATE_VTABLE=DLLIMPORT_VTABLE",
"SLATE_API=",
"WITH_UNREALPNG=1",
"WITH_UNREALJPEG=1",
"WITH_UNREALEXR=1",
"IMAGEWRAPPER_VTABLE=DLLIMPORT_VTABLE",
"IMAGEWRAPPER_API=",
"MESSAGING_VTABLE=DLLIMPORT_VTABLE",
"MESSAGING_API=",
"MESSAGINGCOMMON_VTABLE=DLLIMPORT_VTABLE",
"MESSAGINGCOMMON_API=",
"RENDERCORE_VTABLE=DLLIMPORT_VTABLE",
"RENDERCORE_API=",
"SOCKETS_PACKAGE=1",
"SOCKETS_VTABLE=DLLIMPORT_VTABLE",
"SOCKETS_API=",
"ASSETREGISTRY_VTABLE=DLLIMPORT_VTABLE",
"ASSETREGISTRY_API=",
"ENGINEMESSAGES_VTABLE=DLLIMPORT_VTABLE",
"ENGINEMESSAGES_API=",
"ENGINESETTINGS_VTABLE=DLLIMPORT_VTABLE",
"ENGINESETTINGS_API=",
"SYNTHBENCHMARK_VTABLE=DLLIMPORT_VTABLE",
"SYNTHBENCHMARK_API=",
"RENDERER_VTABLE=DLLIMPORT_VTABLE",
"RENDERER_API=",
"GAMEPLAYTAGS_VTABLE=DLLIMPORT_VTABLE",
"GAMEPLAYTAGS_API=",
"PACKETHANDLER_VTABLE=DLLIMPORT_VTABLE",
"PACKETHANDLER_API=",
"RELIABILITYHANDLERCOMPONENT_VTABLE=DLLIMPORT_VTABLE",
"RELIABILITYHANDLERCOMPONENT_API=",
"AUDIOPLATFORMCONFIGURATION_VTABLE=DLLIMPORT_VTABLE",
"AUDIOPLATFORMCONFIGURATION_API=",
"MESHDESCRIPTION_VTABLE=DLLIMPORT_VTABLE",
"MESHDESCRIPTION_API=",
"STATICMESHDESCRIPTION_VTABLE=DLLIMPORT_VTABLE",
"STATICMESHDESCRIPTION_API=",
"PAKFILE_VTABLE=DLLIMPORT_VTABLE",
"PAKFILE_API=",
"RSA_VTABLE=DLLIMPORT_VTABLE",
"RSA_API=",
"NETWORKREPLAYSTREAMING_VTABLE=DLLIMPORT_VTABLE",
"NETWORKREPLAYSTREAMING_API=",
"PHYSICSCORE_VTABLE=DLLIMPORT_VTABLE",
"PHYSICSCORE_API=",
"COMPILE_WITHOUT_UNREAL_SUPPORT=0",
"CHAOS_MEMORY_TRACKING=0",
"CHAOS_VTABLE=DLLIMPORT_VTABLE",
"CHAOS_API=",
"CHAOS_CHECKED=0",
"CHAOSCORE_VTABLE=DLLIMPORT_VTABLE",
"CHAOSCORE_API=",
"INTEL_ISPC=1",
"VORONOI_VTABLE=DLLIMPORT_VTABLE",
"VORONOI_API=",
"FIELDSYSTEMCORE_VTABLE=DLLIMPORT_VTABLE",
"FIELDSYSTEMCORE_API=",
"WITH_PHYSX_RELEASE=0",
"UE_PHYSX_SUFFIX=PROFILE",
"UE_APEX_SUFFIX=PROFILE",
"APEX_UE4=1",
"APEX_STATICALLY_LINKED=0",
"WITH_APEX_LEGACY=1",
"SIGNALPROCESSING_VTABLE=DLLIMPORT_VTABLE",
"SIGNALPROCESSING_API=",
"WITH_RECAST=1",
"UNREALED_VTABLE=DLLIMPORT_VTABLE",
"UNREALED_API=",
"BSPMODE_VTABLE=DLLIMPORT_VTABLE",
"BSPMODE_API=",
"DIRECTORYWATCHER_VTABLE=DLLIMPORT_VTABLE",
"DIRECTORYWATCHER_API=",
"DOCUMENTATION_VTABLE=DLLIMPORT_VTABLE",
"DOCUMENTATION_API=",
"LOAD_PLUGINS_FOR_TARGET_PLATFORMS=1",
"PROJECTS_VTABLE=DLLIMPORT_VTABLE",
"PROJECTS_API=",
"SANDBOXFILE_VTABLE=DLLIMPORT_VTABLE",
"SANDBOXFILE_API=",
"EDITORSTYLE_VTABLE=DLLIMPORT_VTABLE",
"EDITORSTYLE_API=",
"SOURCE_CONTROL_WITH_SLATE=1",
"SOURCECONTROL_VTABLE=DLLIMPORT_VTABLE",
"SOURCECONTROL_API=",
"UNREALEDMESSAGES_VTABLE=DLLIMPORT_VTABLE",
"UNREALEDMESSAGES_API=",
"GAMEPLAYDEBUGGER_VTABLE=DLLIMPORT_VTABLE",
"GAMEPLAYDEBUGGER_API=",
"BLUEPRINTGRAPH_VTABLE=DLLIMPORT_VTABLE",
"BLUEPRINTGRAPH_API=",
"EDITORSUBSYSTEM_VTABLE=DLLIMPORT_VTABLE",
"EDITORSUBSYSTEM_API=",
"HTTP_PACKAGE=1",
"CURL_ENABLE_DEBUG_CALLBACK=1",
"CURL_ENABLE_NO_TIMEOUTS_OPTION=1",
"HTTP_VTABLE=DLLIMPORT_VTABLE",
"HTTP_API=",
"UNREALAUDIO_VTABLE=DLLIMPORT_VTABLE",
"UNREALAUDIO_API=",
"FUNCTIONALTESTING_VTABLE=DLLIMPORT_VTABLE",
"FUNCTIONALTESTING_API=",
"AUTOMATIONCONTROLLER_VTABLE=DLLIMPORT_VTABLE",
"AUTOMATIONCONTROLLER_API=",
"LOCALIZATION_VTABLE=DLLIMPORT_VTABLE",
"LOCALIZATION_API=",
"WITH_SNDFILE_IO=1",
"AUDIOEDITOR_VTABLE=DLLIMPORT_VTABLE",
"AUDIOEDITOR_API=",
"AUDIOMIXER_VTABLE=DLLIMPORT_VTABLE",
"AUDIOMIXER_API=",
"TARGETPLATFORM_VTABLE=DLLIMPORT_VTABLE",
"TARGETPLATFORM_API=",
"UELIBSAMPLERATE_VTABLE=DLLIMPORT_VTABLE",
"UELIBSAMPLERATE_API=",
"LEVELEDITOR_VTABLE=DLLIMPORT_VTABLE",
"LEVELEDITOR_API=",
"SETTINGS_VTABLE=DLLIMPORT_VTABLE",
"SETTINGS_API=",
"INTROTUTORIALS_VTABLE=DLLIMPORT_VTABLE",
"INTROTUTORIALS_API=",
"HEADMOUNTEDDISPLAY_VTABLE=DLLIMPORT_VTABLE",
"HEADMOUNTEDDISPLAY_API=",
"VREDITOR_VTABLE=DLLIMPORT_VTABLE",
"VREDITOR_API=",
"COMMONMENUEXTENSIONS_VTABLE=DLLIMPORT_VTABLE",
"COMMONMENUEXTENSIONS_API=",
"LANDSCAPE_VTABLE=DLLIMPORT_VTABLE",
"LANDSCAPE_API=",
"PROPERTYEDITOR_VTABLE=DLLIMPORT_VTABLE",
"PROPERTYEDITOR_API=",
"ACTORPICKERMODE_VTABLE=DLLIMPORT_VTABLE",
"ACTORPICKERMODE_API=",
"SCENEDEPTHPICKERMODE_VTABLE=DLLIMPORT_VTABLE",
"SCENEDEPTHPICKERMODE_API=",
"DETAILCUSTOMIZATIONS_VTABLE=DLLIMPORT_VTABLE",
"DETAILCUSTOMIZATIONS_API=",
"CLASSVIEWER_VTABLE=DLLIMPORT_VTABLE",
"CLASSVIEWER_API=",
"GRAPHEDITOR_VTABLE=DLLIMPORT_VTABLE",
"GRAPHEDITOR_API=",
"STRUCTVIEWER_VTABLE=DLLIMPORT_VTABLE",
"STRUCTVIEWER_API=",
"CONTENTBROWSER_VTABLE=DLLIMPORT_VTABLE",
"CONTENTBROWSER_API=",
"ENABLE_HTTP_FOR_NFS=1",
"NETWORKFILESYSTEM_VTABLE=DLLIMPORT_VTABLE",
"NETWORKFILESYSTEM_API=",
"UMG_VTABLE=DLLIMPORT_VTABLE",
"UMG_API=",
"MOVIESCENE_VTABLE=DLLIMPORT_VTABLE",
"MOVIESCENE_API=",
"TIMEMANAGEMENT_VTABLE=DLLIMPORT_VTABLE",
"TIMEMANAGEMENT_API=",
"MOVIESCENETRACKS_VTABLE=DLLIMPORT_VTABLE",
"MOVIESCENETRACKS_API=",
"ANIMATIONCORE_VTABLE=DLLIMPORT_VTABLE",
"ANIMATIONCORE_API=",
"PROPERTYPATH_VTABLE=DLLIMPORT_VTABLE",
"PROPERTYPATH_API=",
"NAVIGATIONSYSTEM_VTABLE=DLLIMPORT_VTABLE",
"NAVIGATIONSYSTEM_API=",
"MESHDESCRIPTIONOPERATIONS_VTABLE=DLLIMPORT_VTABLE",
"MESHDESCRIPTIONOPERATIONS_API=",
"MESHBUILDER_VTABLE=DLLIMPORT_VTABLE",
"MESHBUILDER_API=",
"MATERIALSHADERQUALITYSETTINGS_VTABLE=DLLIMPORT_VTABLE",
"MATERIALSHADERQUALITYSETTINGS_API=",
"INTERACTIVETOOLSFRAMEWORK_VTABLE=DLLIMPORT_VTABLE",
"INTERACTIVETOOLSFRAMEWORK_API=",
"TOOLMENUSEDITOR_VTABLE=DLLIMPORT_VTABLE",
"TOOLMENUSEDITOR_API=",
"WITH_OGGVORBIS=1",
"XAUDIO2_VTABLE=DLLIMPORT_VTABLE",
"XAUDIO2_API=",
"AUDIOMIXERXAUDIO2_VTABLE=DLLIMPORT_VTABLE",
"AUDIOMIXERXAUDIO2_API=",
"ASSETTAGSEDITOR_VTABLE=DLLIMPORT_VTABLE",
"ASSETTAGSEDITOR_API=",
"COLLECTIONMANAGER_VTABLE=DLLIMPORT_VTABLE",
"COLLECTIONMANAGER_API=",
"ADDCONTENTDIALOG_VTABLE=DLLIMPORT_VTABLE",
"ADDCONTENTDIALOG_API=",
"USE_EMBREE=1",
"MESHUTILITIES_VTABLE=DLLIMPORT_VTABLE",
"MESHUTILITIES_API=",
"MESHMERGEUTILITIES_VTABLE=DLLIMPORT_VTABLE",
"MESHMERGEUTILITIES_API=",
"HIERARCHICALLODUTILITIES_VTABLE=DLLIMPORT_VTABLE",
"HIERARCHICALLODUTILITIES_API=",
"MESHREDUCTIONINTERFACE_VTABLE=DLLIMPORT_VTABLE",
"MESHREDUCTIONINTERFACE_API=",
"ASSETTOOLS_VTABLE=DLLIMPORT_VTABLE",
"ASSETTOOLS_API=",
"KISMETCOMPILER_VTABLE=DLLIMPORT_VTABLE",
"KISMETCOMPILER_API=",
"GAMEPLAYTASKS_VTABLE=DLLIMPORT_VTABLE",
"GAMEPLAYTASKS_API=",
"WITH_GAMEPLAY_DEBUGGER=1",
"AIMODULE_VTABLE=DLLIMPORT_VTABLE",
"AIMODULE_API=",
"KISMET_VTABLE=DLLIMPORT_VTABLE",
"KISMET_API=",
"PHYSICSSQ_VTABLE=DLLIMPORT_VTABLE",
"PHYSICSSQ_API=",
"CHAOSSOLVERS_VTABLE=DLLIMPORT_VTABLE",
"CHAOSSOLVERS_API=",
"GEOMETRYCOLLECTIONCORE_VTABLE=DLLIMPORT_VTABLE",
"GEOMETRYCOLLECTIONCORE_API=",
"GEOMETRYCOLLECTIONSIMULATIONCORE_VTABLE=DLLIMPORT_VTABLE",
"GEOMETRYCOLLECTIONSIMULATIONCORE_API=",
"CLOTHINGSYSTEMRUNTIMEINTERFACE_VTABLE=DLLIMPORT_VTABLE",
"CLOTHINGSYSTEMRUNTIMEINTERFACE_API=",
"AUDIOMIXERCORE_VTABLE=DLLIMPORT_VTABLE",
"AUDIOMIXERCORE_API=",
"UE_PROJECT_NAME=MyProject",
"MYPROJECT_VTABLE=DLLEXPORT_VTABLE",
"MYPROJECT_API="
],
最後の3行の箇所をプロジェクトの名前に書き換えます。
"UE_PROJECT_NAME=MyProject",
"MYPROJECT_VTABLE=DLLEXPORT_VTABLE",
"MYPROJECT_API="
プロジェクトの名前がTestProjectであれば
"UE_PROJECT_NAME=TestProject",
"TESTPROJECT_VTABLE=DLLEXPORT_VTABLE",
"TESTPROJECT_API="
といった感じです。
これによってIntellisenceが正しく動作するようになりました。
#参考
Unreal Engine 4.25 & VS Code | Intellisense Bug & Include Errors Fix
#余談
対策方法を探していたら以下の記事にたどり着きました。
VSCode Project creation changes/fixes
内容は割愛しますが、書いてあることを試してみたところあまりうまくいきませんでした。
'C_Cpp.default.defines'の設定が省略されてしまっているので、その部分がわかればうまくいくかもしれません。
下のコメントを見ると4.26になると設定が不要になるとか？
#最後に
自分はIntellisenceについての知識はそれほどありません。
試してみたらうまく行ったみたいな内容ではありますが、参考になれば幸いです。