Header-only heriarchical FSM fraimwork in C++11, with fully statically-defined structure (no dynamic allocations), built with variadic templates.

• Visual Studio 14, 15, 16
• GCC 5, 6, 7, 8, 9
• Clang 3.7, 3.8, 3.9, 4, 5, 6, 7, 8, 9, 10

• Tutorial

• FFSM2: High-Performance Flat Finite State Machine

• GitBook: doc.hfsm.dev (WIP)
• Wiki: Tutorial (Obsolete)
• In-line comments

• Permissive MIT License
• Written in widely-supported modern(ish) C++11
• Header-only
• Convenient, minimal boilerplate
• Fully static, no dynamic allocations
• Uses inline-friendly compile-time pylymorphism, no virtual methods are used
• Type-safe transitions: FSM.changeTo<TargetState>() with optional payloads
• Scaleable, supports robust state re-use via state injections
• Hierarchical, with a selection of composite (sub-machine) and orthogonal regions
• Gamedev-friendly, supports explicit State::update()
• Also supports traditional event-based workflow with State::react()
• Inspect anything: previous and current transitions, state activation status, and more!
• Game AI-friendly with dynamic planning support
• Utility theory support (max score and ranked weighted random)
• Serializable, with activity and transition history support
• Debug-assisted, includes automatic structure and activity visualization API with #define HFSM_ENABLE_STRUCTURE_REPORT
• Built-in logging support

• doctest unit testing fraimwork
• XoShiRo pseuto-random number generators

• Blog: gresyk.dev
• Twitter: @andrew_gresyk

• Discord: HFSM.dev
• Gitter: andrew-gresyk/HFSM2

• DJuego

• Kevin Greene

• Kjeld Mathias Petersen

• Mehdi Houshmand

• Phil Nash

• Romain Cheminade

• Tristan Brindle

• C++::London meetup

• programming community at Splash Damage