HFSM2: High-Performance Hierarchical Finite State Machine Framework

Header-only heriarchical FSM framework in C++14, with fully statically-defined structure (no dynamic allocations), built with variadic templates.

Compiler Support

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

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Tutorial

Check Wiki for basic usage and more info.

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Feature Highlights

• Permissive MIT License
• Written in widely-supported modern(ish) C++14
• Header-only
• Fully static, no dynamic allocations
• Uses inline-friendly compile-time pylymorphism, no virtual methods were harmed
• Type-safe transitions: FSM.changeTo<TargetState>()
• 100% NoUML-compliant
• 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()
• Dynamic planning support
• Utility theory support (both max score and ranked weighted random)
• Scaleable, supports robust state re-use via state injections
• Debug-assisted, includes automatic structure and activity visualization API with #define HFSM_ENABLE_STRUCTURE_REPORT
• Built-in logging support
• Convenient, minimal boilerplate

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3rd Party Libraries

• Catch2 unit testing framework
• XoShiRo pseuto-random number generators

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Get Updates

• Blog
• Twitter

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Special Thanks

• Kevin Greene

• Mehdi Houshmand

• Phil Nash

• Romain Cheminade

• Tristan Brindle

• C++::London meetup

• programming community at Splash Damage