* game/AI: Convert SelectAggroTarget to enum class
* game/AI: Rename SelectAggroTarget to SelectTargetMethod
(cherry picked from commit 418c3b1fd50664aad035bd975a65281e82ba2dea)
- PvE combat is now always mutual. UNIT_FLAG_IN_COMBAT is backed by actual references to the units we're in combat with.
- PvP combat is now also tracked, and almost always mutual; spells like Vanish and Feign Death can break this rule. That means we can easily determine a list of players we're fighting.
- By extension, IsInCombatWith now has sensible behavior when invoked on nonplayers.
- Threat and combat systems are no longer the same.
- They still have an enforced relationship (threat implies combat - clearing combat clears threat)...
- ...but we can have combat without threat. A creature (with threat list) isn't considered to be engaged until it has an entry on its threat list...
- ...which means we can now faithfully replicate retail engage behavior. Combat on projectile launch - engagement start on projectile impact. Yay for progress!
- AI method refactor, as already ported in 6113b9d - `JustEngagedWith`, `JustEnteredCombat` and `JustExitedCombat`.
- Vehicle threat is now properly pooled on the main vehicle body (fixes#16542).
- Various edge case bug fixes for threat redirects (Misdirection "cancelling" Vigilance and similar).
- Target re-selection is now significantly faster.
- Fixed a ton of other smaller edge case bugs, probably.
Closes#7951 and #19998.
(cherry picked from commit 532ab1c7f8653d1a2e48aa1f1f8a9ba1041d4bb7)
Core/Spell: The giant CastSpell unclusterfucking (that's a word now) of this generation.
- CastSpell now always takes three arguments - target, spellId, and a struct containing extra arguments
- This struct (CastSpellExtraArgs, see SpellDefines.h) serves as a conglomerate of every previous combination of the 20 billion different CastSpell overloads, all merged into one
- It has some great utility constructors - check them out! All of these can be used to implicitly construct the ExtraArgs object.
- A gajillion refactors to make everything behave the way it always has
(cherry picked from commit d507a7e3388382960108b24143da48e5f912b4a7)
- True blizzlike creature spawn/respawn behavior - new creature = new object
- Toggleable spawn groups (with C++/SAI/command options to use them)
- Custom feature: dynamic spawn rate scaling. Accelerates respawn rate based on players in the zone.
- Backward compatibility mode (set via group and for summons)
to support creatures/gos that currently don't work well with this
(this should be removed once the exceptions are fixed)
Fixes and closes#2858
Tags #8661 as fixable.
Fixes and closes#13787Fixes#15222.
(cherry picked from commit 59db2eeea0a35028779fd76372ae06cc98c8086f)
* Combat/Threat rewrite (PR #19930) prep work. Mostly refactors, and a compatibility layer on ThreatManager/HostileReference that allows scripts to be changed already.
(cherry picked from commit e2a1ccd118d129b96e09ff1a15ed0adb1d4a3897)
* Mostly aimed at removing Log/DatabaseEnv includes from other headers
* Fix most packet headers including other packet headers - moved common structures such as ItemInstance to their own files
* Moved SAI function definitions to source files (massive or requiring many different dependencies)
Shauren