Unreal Engine Flecs Integration

Unreal-Flecs Discord: https://discord.gg/Q6EWgd8tFK

Flecs Discord: https://discord.gg/WRn8QSfVvx

Note:

Many Features are not complete

Only tested on Version: UE 5.8 MSVC/partially Clang

Contributors to Unreal-Flecs:

@Megafunk
@ronaldburns

For Full Performance benefits make sure to use LTO/PGO in shipping builds.

Wiki/Documentation coming soon

Features:

Universalized Component Type Registration CPP <--> Meta Type, Works with USTRUCT, UENUM, and UCLASS

OS-API implementation for Unreal

Modular Game Loop Implementation to allow for any pipeline setup (also works with module dependencies)

Partial Natvis support for different flecs types

Modifications to Flecs:

New Component Registration in Source/FlecsLibrary/Public/flecs/addons/cpp/component.hpp Disabled flecs Auto Component Registration (do not re-enable) set_symbol in Source/FlecsLibrary/Public/flecs/addons/cpp/mixins/entity/builder.hpp

to_constant in Source/FlecsLibrary/Public/flecs/addons/cpp/mixins/enum/impl.hpp and Source/FlecsLibrary/Public/flecs/addons/cpp/mixins/enum/entity\_view.inl

enum_data::entity(underlying_type_t value) in Source/FlecsLibrary/Public/flecs/addons/cpp/impl/world.hpp

EcsFirstUserComponentId is set to 9

added bUseLowId bool paramn to untyped_component(flecs::world_t *world, const char *name) constructor in Source/FlecsLibrary/Public/flecs/addons/cpp/component.hpp

ensure in the Entity CPP-API is renamed to obtain to be compatible with Unreal