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'''Arrow towers''' are special addition to [[combat]] when hero is trying to capture a garrisoned town. A town can have a primary Arrow tower (when [[Citadel]] is built) or one primary and 2 secondary Arrow towers (when [[Castle (structure)|Castle]] is built).
__NOTOC__
 
== Damage calculation ==
=== Structures ===
 
Arrow tower damage depends on the number of "structures" - buildings built in a town. Not all buildings affect the Arrow tower damage, among them:
*All upgrades of [[Creature Dwelling]]s, [[Mage Guild]] and [[Town Hall]].
*[[Horde Building]]s ({{withhota}} except [[Vault of Ashes]]).
*[[Citadel]] and [[Castle (structure)|Castle]], since they are [[Fort]] upgrades.
*A few towns have several Specific buildings which are upgrades of the other buildings (e.g. [[Brotherhood of  the Sword]], [[Fountain of Fortune]])
 
{| cellpadding=0 cellspacing=0 style="background-color:#{{Purple 3}}; border: 1px solid black; text-align:left;"
|- align=center style="background-color:#{{Purple 1}}; color:white; height:25px; border: 2px solid #{{green 1}}"
! width=165 rowspan="2"| Common buildings, which are structures
! rowspan="2"| Town
! width=460 colspan="2"| Town Specific buildings, which are:
|-
! width=200 align=center style="background-color:#{{Purple 1}}; color:white; height:25px" | Structures !! width=160 align=center style="background-color:#{{Purple 1}}; color:white; height:25px" | Not structures
|-
| rowspan="11" style="padding-left:10px;" | [[Blacksmith]],<br />[[Creature Dwelling]]s (x7),<br />[[Grail building]],<br />[[Mage Guild]],<br />[[Marketplace]],<br />[[Resource Silo]],<br />[[Tavern]],<br />[[Town Hall]] || {{town|Castle|noname=}} || [[Lighthouse]], [[Shipyard]], [[Stables]] || [[Brotherhood of the Sword]],<br />[[Griffin Bastion]]
|- style="background-color:#{{Purple 4}}"
| {{town|Rampart|noname=}} || [[Mystic Pond]], [[Treasury]] || [[Fountain of Fortune]],<br />[[Miners' Guild]], [[Dendroid Saplings]]
|-
| {{town|Tower|noname=}} || [[Artifact Merchants]], [[Library]],<br />[[Lookout Tower]], [[Wall of Knowledge]] || [[Sculptor's Wings]]
|- style="background-color:#{{Purple 4}}"
| {{town|Inferno|noname=}} || [[Brimstone Stormclouds]],<br />[[Castle Gate]], [[Order of Fire]] || [[Birthing Pool]], [[Cages]]
|-
| {{town|Necropolis|noname=}} || [[Cover of Darkness]], [[Shipyard]],<br>[[Necromancy Amplifier]], [[Skeleton Transformer]] || [[Unearthed Graves]]
|- style="background-color:#{{Purple 4}}"
| {{town|Dungeon|noname=}} || [[Artifact Merchants]],<br />[[Battle Scholar Academy]], [[Mana Vortex]],<br />[[Portal of Summoning]] || [[Mushroom Rings]]
|-
| {{town|Stronghold|noname=}} || [[Ballista Yard]], [[Escape Tunnel]],<br />[[Freelancer's Guild]], [[Hall of Valhalla]] || [[Mess Hall]]
|- style="background-color:#{{Purple 4}}"
| {{town|Fortress|noname=}} || [[Blood Obelisk]], [[Cage of Warlords]],<br />[[Glyphs of Fear]], [[Shipyard]] || [[Captain's Quarters]]
|-
| {{town|Conflux|noname=}} || [[Artifact Merchants]], [[Magic University]],<br />[[Shipyard]], [[Vault of Ashes]]{{-wh}} || [[Garden of Life]]
|- style="background-color:#{{Purple 4}}"
| {{town|Cove|noname=}}{{wh}}{{---}} || [[Grotto]], [[Shipyard]], [[Thieves' Guild (Cove building)|Thieves' Guild]] || [[Gunpowder Warehouse]],<br />[[Pub]], [[Roost]]
|-
| {{town|Factory|noname=}}{{wh}}{{---}} || [[Artifact Merchants]], [[Bank]],<br />[[Mana Generator]], 8th [[Creature Dwelling]] || [[Pen]]
|}
 
=== Damage ===
The damage of the primary Arrow tower is calculated by the formula:
 
<big>''Damage = Base_Damage + d * N''</big>
 
The damage of the secondary Arrow tower is calculated by the formula:
 
<big>''Damage = Base_Damage + d * N/2''</big>
 
where ''Base_Damage'' - is the base Arrow tower damage, equal to 10..20 points of damage for the primary and 6..12 points for the secondary Arrow towers; ''d'' - additional damage for every structure built, equal to 2..4 points; ''N'' - number of structures built. The result of ''N/2'' is rounded down.
 
As indicated above, different towns have a different number of structures available, therefore, a different maximal Arrow tower damage range.
 
{| cellpadding=0 cellspacing=0 style="background-color:#{{Purple 3}}; border: 1px solid black; text-align:center;"
|- align=center style="background-color:#{{Purple 1}}; color:white; height:25px; border: 2px solid #{{green 1}}"
! Town
! width=100 | Number of structures
! width=150 | Primary Arrow tower damage range
! width=150 | Secondary Arrow tower damage range
|-
| [[File:Town portrait Castle small.gif|link=Castle|40px]] || 17 || 44..88 || 22..44
|- style="background-color:#{{Purple 4}}"
| [[File:Town portrait Rampart small.gif|link=Rampart|40px]] || 16 || 42..84 || 22..44
|-
| [[File:Town portrait Tower small.gif|link=Tower|40px]] || 18 || 46..92 || 24..48
|- style="background-color:#{{Purple 4}}"
| [[File:Town portrait Inferno small.gif|link=Inferno|40px]] || 17 || 44..88 || 22..44
|-
| [[File:Town portrait Necropolis small.gif|link=Necropolis|40px]] || 18 || 46..92 || 24..48
|- style="background-color:#{{Purple 4}}"
| [[File:Town portrait Dungeon small.gif|link=Dungeon|40px]] || 18 || 46..92 || 24..48
|-
| [[File:Town portrait Stronghold small.gif|link=Stronghold|40px]] || 18 || 46..92 || 24..48
|- style="background-color:#{{Purple 4}}"
| [[File:Town portrait Fortress small.gif|link=Fortress|40px]] || 18 || 46..92 || 24..48
|-
| [[File:Town portrait Conflux small.gif|link=Conflux|40px]] || 17<br />''(18{{-wh}})'' || 44..88<br />''(46..92{{-wh}})'' || 22..44<br />''(24..48{{-wh}})''
|- style="background-color:#{{Purple 4}}"
| {{---}}{{-}}{{-}}[[File:Town portrait Cove small.gif|link=Cove|40px]]{{-wh}} || 17 || 44..88 || 22..44
|-
| {{---}}{{-}}{{-}}[[File:Town portrait Factory small.gif|link=Factory|40px]]{{-wh}} || 18 || 46..92 || 24..48
|}
 
The Arrow tower damage cannot be changed by any other damage modificator. The [[Defense]] parameter of their targets is always ignored. Despite the right-click tip says that an Arrow tower has 10 [[Attack]], final damage remains unmodified. [[Archery]] or the [[Artillery]] secondary skills do not affect the damage as well, but a defending hero with [[Artillery]] skill is able to control the Arrow towers during a siege. Arrow towers cannot deliver a [[Luck|lucky strike]].
 
The only exception is a '''bug''', which cause the troops under command of a hero with [[Armorer]] secondary skill take additional damage from the Arrow tower attack. Troops, which are buffed by [[Air Shield]] spell or are [[Petrify|petrified]] take additional damage as well. ''(Fixed in {{hota}}).''
 
== Arrow towers under the AI control ==
'''General observation''': Arrow towers target the enemy troops depending on their "class". The class is assigned for every enemy troop stack based on their opportunities to deliver damage to the defending troops.
 
*''Class A'' - the enemy troop stack can attack immediately when it is its turn to act. [[Ranged]] units, that still can shoot, belong here.
*''Class B'' - enemy troop stack, which can't attack immediately, but can attack its next turn.
*''Class C'' - enemy troop stack, which can't attack immediately and its next turn, but can attack after.


The AI considers the Arrow tower damage equal to 1 (bug), that is why it prefers to target the stacks with 1 unit in it over the stack of the same units with number, let's say, 10 in it.
'''Arrow towers''' are special addition to [[combat]] when hero is trying to capture a town.


There are 2 factors, based on which AI chooses its target. The priority target is calculated separately for each class.
== Damage ==
=== Calculation ===
*All shooters of all towns do the same damage
*If [[Fort]], [[Citadel]] and [[Castle (structure)|Castle]] is built the Base Damage is 15 for the Keep, and approx. the half of it for the other shooters.
*Every Building (dwellings, marketplace etc.) increase the damage of the Keep by 3, which means approx. 6 more damage per round (3 +1,5 +1,5).
*Dwelling and [[Mage Guild]] upgrades do not increase the damage.
*Although there is a range given (rightclick on Keep) it will almost always do the max. Damage (sometimes +1 or 2 points)
*It doesn't matter what is the target, the damage will be the same no matter what.
*[[Secondary Skills]], [[Artifacts]] etc. (especially [[Archery]] or [[Artillery]]) don't have influence to the damage.
''Formula for total damage per round: '''(Keep + Buildings * 3) *2'''''


'''Loss in army power'''
Defending heroes with the [[Artillery]] skill will be able to control the Arrow Towers
*<big>''For class A: priority = 1 * ([[AI Value]] / hp) * 100%''</big>, where 1 is the Arrow tower damage (bug); AI Value - total Value of the stack; hp - total [[Health]] of the stack.
*<big>''For class B: priority = 1 * (AI Value / hp) * 50%''</big>
*<big>''For class C: priority = 1 * (AI Value / hp) * 33%''</big>


'''Loss in army quantity'''
=== Maximum damage ===
*<big>''For class A: priority = 1 / hp * 100%''</big>, where 1 is the Arrow tower damage (bug); hp - total Health of the stack.
*[[Castle]] and [[Conflux]] : 120
*<big>''For class B: priority = 1 / hp * 50%''</big>
*[[Necropolis]], [[Inferno]] and [[Fortress]] : 125
*<big>''For class C: priority = 1 / hp * 33%''</big>
*[[Stronghold]], [[Tower]] and [[Dungeon]] : 130


After the calculations AI chooses a target with the highest calculated priority. If there are several troops with the equal priority, then the AI will choose a stack, which was placed in the rightmost slot of the hero's army.
=== Bugs ===
 
*Heroes with [[Armorer]] skill take additional damage (approx. double).
Knowing this and considering the fact that the AI prefers to target shooters, it might be a good decision to fill your empty rightmost slots with ranged troops with a single unit in each of them. The other possible way of saving the friendly ranged stacks is to move forward, closer to the primary Arrow tower, a powerful stack of tier 1 troops or a [[flying]] stack.
*Creatures with [[Air Shield]] take additional damage (same as above).
 
== Appearance ==
Each faction's arrow towers will appear to be garrisoned by a different creature, typically the lowest-level [[Ranged]] creature available to that town (with a few exceptions: Tower, Dungeon, and Factory). This is purely cosmetic, and the towers do not have any of the effects from their creatures; for example, [[Necropolis]] towers do not have a Death Cloud effect despite appearing to be garrisoned by [[Lich]]es.
 
Here is a list of each creature that appears in Arrow towers:
 
{| cellpadding=0 cellspacing=0 style="background-color:#{{Purple 3}}; border: 1px solid black; text-align:left;"
|- align=center style="background-color:#{{Purple 1}}; color:white; height:25px; border: 2px solid #{{green 1}};"
! Town
! width=165 | Creature
|-
| {{town|Castle|noname=}} || style="padding-left:10px" | {{cn|Archer}}
|- style="background-color:#{{Purple 4}}"
| {{town|Rampart|noname=}} || style="padding-left:10px" | {{cn|Wood Elf}}
|-
| {{town|Tower|noname=}} || style="padding-left:10px" | {{cn|Mage}}
|- style="background-color:#{{Purple 4}}"
| {{town|Inferno|noname=}} || style="padding-left:10px" | {{cn|Gog}}
|-
| {{town|Necropolis|noname=}} || style="padding-left:10px" | {{cn|Lich}}
|- style="background-color:#{{Purple 4}}"
| {{town|Dungeon|noname=}} || style="padding-left:10px" | {{cn|Medusa}}
|-
| {{town|Stronghold|noname=}} || style="padding-left:10px" | {{cn|Orc}}
|- style="background-color:#{{Purple 4}}"
| {{town|Fortress|noname=}} || style="padding-left:10px" | {{cn|Lizardman}}
|-
| {{town|Conflux|noname=}} || style="padding-left:10px" | {{cn|Storm Elemental}}
|- style="background-color:#{{Purple 4}}"
| {{town|Cove|noname=}}{{wh}} || style="padding-left:10px" | {{cn|Corsair}}
|-
| {{town|Factory|noname=}}{{wh}} || style="padding-left:10px" | {{cn|Gunslinger}}
|}
 
== {{hota}} ==
Damage calculation was changed to make Arrow towers more dangerous. Their innate 10 [[Attack]] points now added together with the defending hero Attack skill and increase damage properly, while still ignoring the target's [[Defense]] parameter. [[Archery]] now increase the Arrow tower damage as well. The [[Armorer]], [[Air Shield]] and [[Petrification]] bug has been fixed, so these modificators now properly decrease the Arrow tower damage.


[[Category: Combat]]
[[Category: Combat]]
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