Retro_ML.StreetFighter2Turbo

Street Fighter 2 Turbo plugin

Plugin by Jaewongtongsoup

Training AIs to beat Street Fighter 2 Turbo fights automatically.

Special Thanks

• johnlike728: His list helped to scope the range of attacks.

Configuration

Plugin Configuration

• Internal Clock Tick Length (Frames)
  • The time (in frames) that it takes for the internal clock to move to its next state.
• Internal Clock Length
  • The total amount of nodes the internal clock has.
  • The total time it takes for the clock to do a full cycle is equal to 2^Clock Length * Tick Length frames.
• Frame Skip
• Amount of frames to skip for every AI evaluation

Objectives

• Combat
  • The amount of points to attribute to an AI for its combat prowess at the end of a round.
  • The amount of points depends on the time of the fight and the HP delta between the AI and the enemy.
  • The score given is equal to ScoreMultiplier * HPDelta (can be negative) * (TimeOfTheFight * TimerInfluence + (1.0 - TimerInfluence)).
  • The TimerInfluence is a multiplier between 0 and 1 that represent the weight carried by the time of the fight in the score calculation.
• End Round
  • Points to attribute depending on the outcome of a round. Also influenced by a different multiplier for every outcome (Win, Lose, Draw)
• Stopped Fighting
  • Stops the current fight if the AI has not hit the enemy for a specific amount of frames. Used to speed up training by skipping AIs that don't fight.

Neural Configuration

• Input nodes

  • Player Crouched : If the player is in a crouched stance.
  • Enemy Crouched : If the enemy is in a crouched stance.
  • Player Airborn : If the player is airborn.
  • Enemy Airborn : If the enemy is airborn.
  • Player Attacking : If the player is attacking.
  • Enemy Attacking : If the enemy is attacking.
  • Player Punching : If the player is attacking with a punch.
  • Enemy Punching : If the enemy is attacking with a punch.
  • Player Kicking : If the player is attacking with a kick.
  • Enemy Kicking : If the enemy is attacking with a kick.
  • Player Throwing : If the player is attacking with a throw attack.
  • Enemy Throwing : If the enemy is attacking with a throw attack.
  • Player Blocking : If the player is blocking.
  • Enemy Blocking : If the enemy is blocking.
  • Player Staggered : If the player is in a staggered state. Most of the time it is triggered after receiving an attack.
  • Enemy Staggered : If the enemy is in a staggered state. Most of the time it is triggered after receiving an attack.
  • Player Attack Strength : Value between 0 and 1 that represent the strength of the attack used by the player. 1/3 for a light attack, 2/3 for a medium attack and 1 for a strong attack.
  • Enemy Attack Strength : Value between 0 and 1 that represent the strength of the attack used by the enemy. 1/3 for a light attack, 2/3 for a medium attack and 1 for a strong attack.
  • Player X : Player X position on the stage.
  • Enemy X : Enemy X position on the stage.
  • X Delta : X position delta between the player and the enemy.
  • Y Delta : Y position delta between the player and the enemy.
  • Enemy Direction : Boolean set to 1 if the enemy is facing left. 0 if the enemy is facing right.
  • Player Health : Value between 1 and 0 representing the percentage of health remaining to the player.
  • Enemy Health : Value between 1 and 0 representing the percentage of health remaining to the enemy.
  • Time Left : Value between 1 and 0 representing the percentage of the clock remaining.
  • Internal clock : Timed bias value. See Internal Clock Tick Length (Frames) and Internal Clock Length above
  • Bias : Bias value. Always on.

• Output Nodes

  • The output nodes represent each button on an SNES controller.
  • A : Middle Kick
  • B : Low Kick
  • X : Middle Punch
  • Y : Low Punch
  • Left Shoulder : High Punch
  • Right Shoulder : High Kick
  • Left : Move Left, blocks if moving away from enemy
  • Right : Move Right, blocks if moving away from enemy
  • Up : Jump.
  • Down : Crouch.
  • Start and Select : Useless