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Notes.md

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Implementation Notes

Note

For the most part, NMS and related libraries and source code will be referenced using their full path.

Our code will be referenced without a path.

Checks and Values

Targetable

A target is considered targetable if the enemy can lock on them and attempt attacks on the player.

net.minecraft.world.entity.LivingEntity::canAttack(LivingEntity, TargetingConditions)

  • Using TargetingConditions.forCombat(), the checks are...
    • Will not attack itself.
    • Target is not in spectator and is alive.
    • Target is not the player in Peaceful mode.
    • Target is not invulnerable.
    • Attacker can attack the Target's Entity Type.
    • Target is not the Attacker's Ally.
    • Attacker has some positive range and passes calculation regarding invisibility detection.
      • Some mobs will ignore invisibility like the Evoker.
    • If line of sight needs to be checked and the Attacker is a Mob, check for line of sight to the Target.
      • Ignoring line of sight occurs with mobs like the Vex and Evoker.
    • The targeting conditions can be modified with the additional methods provided by the class.

Attackable

A target is considered attackable if it is targetable and has the potential to be hit.

  • Attackers without any ranged attacks must resort to melee attacks.
  • Attackers with ranged attacks should consider a target attackable if they can fire towards the target successfully.
    • This does not necessarily mean the target can be hit, just that the projectile is fired towards the target.
      • May pose an issue since Skeletons and Pillagers both shoot even if the arrow cannot possibly hit the target.

canMeleeAttack() incorporates parts of the MeleeAttackGoal.

  • net.minecraft.world.entity.ai.goal.MeleeAttackGoal::getAttackReachSqr(LivingEntity)
    • This function is modified for our use.
  • net.minecraft.world.entity.ai.goal.MeleeAttackGoal::canUse()
    • This function contains a check for the attackable region around the Attacker.

Reachable

A target is considered reachable if the attacker can pathfind close enough to attack.

  • Attackers without any ranged attacks must be able to close the distance to the Target.
  • This does not really concern ranged attackers as much, but since ranged attacks have a maximum distance, may be worth looking to if it poses as an issue.

Environmental Damage

Damage is considered environmental if it is one of the configured blacklisted damage reasons. This should prevent bringing a mob's health down to a level where they can be killed with very little effort