Editing Talk:Projectile (section)

== Reverse engineering ==

Behaviors common to all projectiles:

* ''GetGravity'' - Gravity is always treated as 1.0 unless the projectile is a Missile (or arrow, given that arrows subclass missiles?).

The different projectile types override these virtual functions on the base ''Projectile'' class:

* Arrow
** ''ProcessImpacts''
** ''GetGravity'': <code>return fArrowWeakGravity - (this->power * (fArrowWeakGravity - Projectile::GetGravity())))</code>. This computes to ''power'' &times; (''gravity'' - ''weak gravity'') + ''weak gravity''. Of course, the projectile's type is "arrow;" if that doesn't count as being a missile, then ''gravity'' should always be 1.0, so this would work out to ''weak gravity'' - (''power'' &times; ''weak gravity'').
** ''ShouldBeLimited'': True if the internal ''kProcessedImpacts'' flag is set on the projectile instance.
** ''AddImpact'': Among other things, tests whether the actor can be hit by the given projectile (e.g. they're not flagged as a "ghost"), and handles the Mod Shield Deflect Arrow Chance and Apply Combat Hit Spell [[Perk Entry Points|perk entry points]].
* Barrier
** ''ProcessImpacts''
** ''GetKillOnCollision'': Always false. (The default is "always true.")
* Beam
** ''GetKillOnCollision'': Always false.
** ''AddImpact''
* Cone
** ''ProcessImpacts'': No-op if the projectile has faded out or traveled past its range.
** ''GetKillOnCollision'': Always false.
** ''AddImpact''
** ''HandleHits''
* Flame
** ''RunTargetPick'': Alternate logic; differences unknown. Modifies the ''fFlameProjectileLength'' animation graph variable on the projectile.
** ''AddImpact'': Avoids adding an impact if one already exists for the specified target.
* Grenade
** ''ReportHavokDeactivation''
** ''AddImpact''
** ''OnTriggerEnter''
* Missile
** ''ProcessImpacts''
** ''GetKillOnCollision'': True if the projectile's internal "result" value is set to "destroy."
** ''AddImpact'': If an impact is successfully added, sets the projectile's "result" value to the impact's own result value if it's non-"none," or to "destroy" otherwise.

Out of energy to keep digging, for now.

[[User:DavidJCobb|DavidJCobb]] ([[User talk:DavidJCobb|talk]]) 19:25, 16 August 2026 (EDT)