For Blueprint in the content, right clic on it, migrate.
For source code, you can:
Simple Way
Copy past the directory inside [Source/YourOldProject], add YourOldProject to Source/YourNewProject.Target > ExtraModuleName.AddRange && to YourNewProject.uproject add
« Modules »: [
{
« Name »: « YourOldProject »,
« Type »: « Runtime »,
« LoadingPhase »: « Default »
}
Don’t forget IMPLEMENT_PRIMARY_GAME_MODULE that become IMPLEMENT_GAME_MODULE
Fully Integrated Way
Copy your source into your new project source folder. inside theses .h sources, rename YOUROLDPROJECT_API to YOURNEWPROJECT_API.
If your blueprint reference to theses source, add inside Config/DefaultEngine.ini
+ActiveGameNameRedirects=(OldGameName= »/Script/OldName », NewGameName= »/Script/NewName »)
+ActiveGameNameRedirects=(OldGameName= »/Script/YourOldProject.OldSource », NewGameName= »/Script/YourNewProject.OldSource »)