Double damage - Revision history

Tomsod: /* Description */ pet-relevant info

2025-12-15T18:58:18Z

‎Description: pet-relevant info

Umbire the Phantom: send some parked stuff before I restart - copyedit and spacing here

2024-06-14T21:01:11Z

send some parked stuff before I restart - copyedit and spacing here

Furey: /* History */ move steelypips weap-343.txt into history.

2024-06-07T05:03:48Z

‎History: move steelypips weap-343.txt into history.

Furey: /* Step 1: base damage, enchantment bonus */ oops, fix a placeholder refsrc.

2024-06-07T04:54:16Z

‎Step 1: base damage, enchantment bonus: oops, fix a placeholder refsrc.

Furey: /* Strategy */ Mention erosion.

2024-06-07T04:50:30Z

‎Strategy: Mention erosion.

Furey: /* What gets doubled */ tweak refs. poison comes before jousting.

2024-06-07T04:48:29Z

‎What gets doubled: tweak refs. poison comes before jousting.

Furey: Update the detailed calculation from 3.6.0 to 3.6.7. Copy edit it to a more expanded explanation. Bump version template.

2024-06-07T04:39:31Z

Update the detailed calculation from 3.6.0 to 3.6.7. Copy edit it to a more expanded explanation. Bump version template.

Furey: First pass. Remove the table of weapons; refer to Artifact#Artifact_weapons, which is authoritative. Some copy editing.

2024-06-06T19:50:15Z

First pass. Remove the table of weapons; refer to Artifact#Artifact_weapons, which is authoritative. Some copy editing.

Furey: First pass. Copy edit. r

2024-06-06T19:48:08Z

First pass. Copy edit. r

Umbire the Phantom: chance to:opportunity::chance of:probability

2023-10-29T10:00:32Z

chance to:opportunity::chance of:probability

@@ Line 8: / Line 8: @@
 * The [[Enchantment#Weapons|enchantment]] damage bonus (or penalty)
 * The penalty for [[erosion]]
-* [[Rogue]] [[backstab]] damage.
+* [[Rogue]] [[backstab]] damage
 Double damage does not double the following:

@@ Line 1: / Line 1: @@
 {{Tocright}}
-'''Double damage''' is a weapon property.
+==Description==
+When the double damage property activates, the following damage rolls have their result doubled:
 * The weapon's base damage
@@ Line 14: / Line 10: @@
 * [[Rogue]] [[backstab]] damage.
-Double damage does not double these things:
+Double damage does not double the following:
 * bonus for using a [[blessed]] weapon against [[undead]]
@@ Line 26: / Line 22: @@
 * bonus for [[joust]]ing
-== Strategy ==
+==Strategy==
 Enchanting double-damage artifact weapons yields higher returns compared to their standard counterparts. So does fixing erosion.
-== Source dive, step by step ==
+==Source dive, step by step==
 This algorithm is from [[NetHack 3.6.7]].

@@ Line 90: / Line 90: @@
 Note that these effects may be calculated differently from the vanilla mechanics described above.
-== See also ==
+== History ==
-See http://www.steelypips.org/nethack/343/weap-343.txt, the weapons spoiler by Kevin Hugo at steelypips for a run down on NetHack's entire damage calculation process.
 == References ==

@@ Line 40: / Line 40: @@
 === Step 1: base damage, enchantment bonus ===
-<tt>hmon_hitmon</tt> calls <tt>dmgval</tt>.{{refsrc|src/uhitm.c|767|nethack=3.6.7}}{{refsrc|src/weapon.c|1|nethack=3.6.7}}
+<tt>hmon_hitmon</tt> calls <tt>dmgval</tt>.{{refsrc|src/uhitm.c|767|nethack=3.6.7}}{{refsrc|src/weapon.c|204|nethack=3.6.7}}
 First, <tt>dmgval</tt> calculates:

@@ Line 28: / Line 28: @@
 == Strategy ==
-Enchanting double-damage artifact weapons yields higher returns compared to their standard counterparts.
+Enchanting double-damage artifact weapons yields higher returns compared to their standard counterparts. So does fixing erosion.
 == Source dive, step by step ==

@@ Line 22: / Line 22: @@
 * bonuses for [[ring of increase damage|rings of increase damage]] (both worn and eaten)
 * bonus for weapon [[skill]]
-* bonus for [[Attribute#Strength|strengh]]
+* bonus for [[Strength]]
 * bonus for [[joust]]ing
 == Strategy ==

@@ Line 1: / Line 1: @@
-'''Double damage''' is a weapon property that doubles the base [[damage]] of the weapon.
+{{Tocright}}
-Several artifact weapons do double damage, some against specific types of monsters, some against broad groups of monsters, and some against every monster. See [[Artifact#Artifact_weapons]] for a detailed list.
+'''Double damage''' is a weapon property.
-== Details ==
+Several artifact weapons do double damage: some against specific types of monsters, some against broad groups of monsters, and some against every monster. See [[Artifact#Artifact_weapons]] for a detailed list.
-When the double damage property activates, it affects the following components of a weapon's damage:
+== What gets doubled ==
-* The weapon's base damage.
+When the double damage property activates, it doubles these things:
-Double damage does not affect the following:
+* The weapon's base damage
-* The extra d4 for using a [[blessed]] weapon against [[undead]].
+Double damage does not double these things:
-Enchanting double-damage artifact weapons generally yields higher returns compared to their standard counterparts, though negative enchantments also result in much weaker damage.
+* bonus for using a [[blessed]] weapon against [[undead]]
-== Calculation ==
+== Strategy ==
-{{merge|damage}}
+Enchanting double-damage artifact weapons yields higher returns compared to their standard counterparts.
-hmon_hitmon in uhitm.c is called once for each melee hit on a monster, whether the hit is barehanded, with a weapon, with a weapon tool, or with something else (silver wand, cream pie, or cockatrice corpse for instance). If twoweaponing, it is called once for each of the two weapons or weapon-tools in use.{{refsrc|src/uhitm.c|504|nethack=3.6.0|comment=hitum calls known_hitum}}{{refsrc|src/uhitm.c|464|nethack=3.6.0|comment=first call to hmon}}{{refsrc|src/uhitm.c|512|nethack=3.6.0|comment=second call to known_hitum for second weapon}}{{refsrc|src/uhitm.c|531|nethack=3.6.0|comment=hmon calls hmon_hitmon}}
+== Source dive, step by step ==
-Reading hmon_hitmon and its sub-functions gives us the order in which bonuses are applied, and thus tells us which of these bonuses will be affected by double damage.
+This algorithm is from [[NetHack 3.6.7]].
-Inside hmon_hitmon, the weapon/item in question is stored in the variable obj. The damage is stored in tmp, and this variable is modified as the function progresses, adding layer upon layer of NetHack combat functionality. hmon_hitman calls dmgval in weapon.c to get the base damage, enchantment bonus, and situation bonuses for the weapon.{{refsrc|src/uhitm.c|643|nethack=3.6.0}}. dmgval adds bonuses for using blessed weapons against undead, axes against wooden monsters, and silver against silver hating monsters, but tests to see if the weapon will do double damage and divides these values by two in that case (so the bonuses are not doubled).{{refsrc|src/weapon.c|332|nethack=3.6.0|comment=bonuses calculated and fiddled with}}. dmgval also subtracts damage due to erosion.{{refsrc|src/weapon.c|346|nethack=3.6.0}}
+Each time the hero hits a monster in melee, the game calls <tt>hmon_hitmon</tt>.{{refsrc|src/uhitm.c|667|nethack=3.6.7}}. If the hero is [[twoweapon]]ing, the game calls <tt>hmon_hitmon</tt> twice, once for each hit.
-hmon_hitmon then considers backstab damage.{{refsrc|src/uhitm.c|648|nethack=3.6.0|comment=back stab damage section}}.
+<tt>hmon_hitmon</tt> has numerous cases, such as bare-handed attacks, hitting with a wielded bow, hitting with a corpse, and so on. We are going to follow the case for hitting with an artifact weapon that may do double damage.
-Double damage and other special artifact effects (like Magicbane's specials and the Tsurugi's special, which could itself by double damage) are added in by artifact_hit in artifact.c.{{refsrc|src/uhitm.c|685|nethack=3.6.0|comment=hmon_hitmon calls artifact_hit}}.
+=== Step 1: base damage, enchantment bonus ===
-Finally, hmon_hitmon adds on intrinsic damage bonuses and damage bonuses from rings of increase damage{{refsrc|src/uhitm.c|962|nethack=3.6.0|comment=damage bonus added}}; followed by the bonus for skill in the weapon's class {{refsrc|src/uhitm.c|976|nethack=3.6.0|comment=weapon skill bonus}}; and lastly, poison damage is potentially added {{refsrc|src/uhitm.c|1003|nethack=3.6.0|comment=poison damage}}. Bare-hands or martial arts skill only grant their damage bonus if the d2 or d4 base damage is at least two -- effectively you are at unskilled 50% or 25% of the time.{{refsrc|src/uhitm.c|464|nethack=3.6.0|comment=bare-handed start}}{{refsrc|src/uhitm.c|976|nethack=3.6.0|comment=weapon_dam_bonus call}}{{refsrc|src/weapon.c|1395|nethack=3.6.0|comment=bare-handed calculation}}
+<tt>hmon_hitmon</tt> calls <tt>dmgval</tt>.{{refsrc|src/uhitm.c|767|nethack=3.6.7}}{{refsrc|src/weapon.c|1|nethack=3.6.7}}
-(tmp, the damage, is subtracted from the monster's hp, mon->mhp on line 1064{{refsrc|src/uhitm.c|1064|nethack=3.6.0|comment=tmp subtracted from mon->mhp}}.)
+First, <tt>dmgval</tt> calculates:
-==SLASH'EM==
+=== Step 2: situation bonuses ===
 A number of [[SLASH'EM]] [[technique]]s grant temporary double damage: [[Samurai]]'s [[Kiii]] doubles all weapon damage, while [[Missile flurry]], for [[Drow (starting race)|droven]] [[Ranger]]s only, doubles the damage done with their racial bow and arrows.  Finally, [[Caveman]]'s [[Primal roar]] grants double damage to [[pet]]s.
 Note that these effects may be calculated differently from the vanilla mechanics described above.
-==See also==
+== See also ==
 See http://www.steelypips.org/nethack/343/weap-343.txt, the weapons spoiler by Kevin Hugo at steelypips for a run down on NetHack's entire damage calculation process.
-==References==
+== References ==
 <references/>
-{{nethack-360}}
+{{nethack-367}}
 [[Category:Weapons]]

@@ Line 18: / Line 18: @@
 * [[The Sceptre of Might]] against [[alignment|cross-aligned]] monsters.
 * The [[Staff of Aesculapius]] against monsters without [[drain resistance]].
-* The [[Tsurugi of Muramasa]] has a 5% chance to deal double-damage against [[Physical size|large]] [[monster]]s - this is of a different nature compared to the others, but is calculated at effectively the same time and in the same way.
+* The [[Tsurugi of Muramasa]] has a 5% chance of dealing double-damage against [[Physical size|large]] [[monster]]s - this is of a different nature compared to the others, but is calculated at effectively the same time and in the same way.
 * [[Fire Brand]], against those without [[fire resistance]].
 * [[Frost Brand]] against monsters without [[cold resistance]].