Finite State Machine (FSM) - DerekJi/ngtetris GitHub Wiki

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Finite State Machine

After powered on, the Tetris has 5 states

• NOT_STARTED: play the animations, and then send SET_READY event
• READY: show the screen of READY, waiting for START event
• STARTED: game started.
• PAUSED: game paused.
• COMPLETED: game over. It plays the animations, and then sends RESET event to transit to NOT_STARTED state

@startuml

[*] -[#blue,bold]-> NOT_STARTED
NOT_STARTED -left-> NOT_STARTED: Tick
NOT_STARTED -[#blue,bold]-> READY: SetReady

READY -[#blue,bold]down-> STARTED: Start/Pause
  STARTED -[#gray]-> PAUSED: Start/Pause
  PAUSED -[#gray]-> STARTED: Start/Pause
STARTED -[#blue,bold]-> COMPLETE: Down/Tick/Drop

STARTED -up-> STARTED: LEFT, RIGHT, ROTATE, DOWN, DROP, Tick

STARTED -[#DD33AA]left-> NOT_STARTED: Reset
PAUSED -[#DD33AA]-> NOT_STARTED: Reset
COMPLETE -[#DD33AA]-> NOT_STARTED: Reset

COMPLETE -[#blue,bold]left-> [*]
COMPLETE: Game over

@enduml