Volcano

Contract

ANvc is TFT-only CAbilityVolcano (parent AAsm). ROC AbilityData.slk has no row. It is a point-target channeled hero spell (AB_SPELL | AB_CHANNEL, SPELL_TARGET_POINT). The Firelord must keep channeling; movement or stun cancels remaining waves through the shared spell_run_frame / S_SpellChannelActive path.

WorldEdit AbilityMetaData labels (WESTRING_AEVAL_NVC* / NVCU):

Field	Stock TFT	AbilityMetaData	Runtime use
DataA	3	Rock Ring Count	presentation only (molten-rock missiles per wave); no separate blocking-rock / impact-point contract without projectile helpers
DataB	8	Wave Count	number of damage pulses
DataC	5	Wave Interval (seconds)	delay between pulses
DataD	2	Building Damage Factor	buildings take wave damage × DataD
DataE	100	Full Damage Amount	per-wave unit damage inside Area/2
DataF	0.5	Half Damage Factor	past Area/2 (to Area) take DataE * DataF
Dur / HeroDur	2 / 1	—	stun lengths only
Area	500	—	outer blast radius; full-damage radius is Area/2
UnitID	Volc	Destructible ID	volcano doodad at the channel point (G_CreateDestructable)
BuffID	BNvc,BNva	—	presentation; stun uses Bstu
targs	ground,structure,notself,tree,debris	—	living ground/structure + tree/debris destructibles

Ubertip duration “Lasts 35 seconds” is channel length from the wave schedule: first wave at t=0, then every DataC seconds for DataB waves (8 * 5s → last wave at 35s). Do not treat Dur/HeroDur as channel lifetime.

Ubertip only names DataE for damage; it does not mention half damage. The Full Damage Amount / Half Damage Factor AbilityMetaData pair still requires a radial split. No separate full-damage radius field exists on ANvc, so the inner half of Area takes full DataE and the outer ring takes DataE * DataF (same inner-full / outer-partial shape as Self Destruct when only one Area is authored). Buildings still multiply by DataD after that split.

DataA Rock Ring Count is the authored molten-rock missile count used by the retail presentation. This engine applies each wave as a uniform Area pulse; do not invent blocking rock rings or per-missile targeting until a shared rock projectile helper exists.

Data Flow

AbilityData.slk (ANvc, TFT only)
  -> DataB/C/D/E/F, Area, Dur/HeroDur, UnitID, targs, Cost, Rng
CAbilityVolcano + S_SpellChannelThinker
  -> G_CreateDestructable(UnitID) at point (Volc doodad)
  -> volcano_think pulses while S_SpellChannelActive
T_Damage / G_DestructableApplyDamage
  -> units: DAMAGE_TYPE_NORMAL path (hits spell-immune; not S_SpellDamage)
  -> trees/debris in Area take the same wave damage
unit_addtimedstatus(Bstu)
  -> Dur for non-heroes, HeroDur for heroes (same as Storm Bolt)

Known Pitfalls

A prior “finish Volcano coverage” test was reverted because it invented field meanings (notably treating DataF=40 as damage). Always map fields from AbilityMetaData / the ubertip, not from guessed numeric coincidences.

Do not treat DataF as a flat damage number. Do not treat Dur as channel lifetime.

Diagnostic Workflow

build/bin/ability_audit -data 'data/Warcraft III' -raw ANvc
build/bin/ability_audit -data 'data/Warcraft III' -tft -raw ANvc

ROC prints AbilityData: not found; TFT prints the row above. AbilityMetaData strings: WESTRING_AEVAL_NVC1…NVC6, NVCU.

Verification

make test-wc3-engine WC3_PATTERN='wc3_spell.volcano*'

Focused tests use non-stock DataB=2, DataC=1, DataE=40, DataD=3, DataF=0.25, UnitID=Vtst so they cannot pass on hardcoded retail constants. They cover first-wave damage and building factor, outer-ring half damage, Bstu Dur vs HeroDur, tree/debris destruction, Volc doodad spawn, the second pulse via G_RunEntities, caster-move cancel, and out-of-area immunity.