Skyrim Mod:Mod File Format/WEAP

WEAP records hold information about weapons.

C	V	Field	Name	Type/Size	Info
-		BAMT	unknown	formID	Alternate block material. Points to a MATT.
-		BIDS	unknown	formID	Block bash impact data set. Points to a IPDS.
-		CNAM	template	formID	Points to another WEAP record to use as a template
?		CRDT	Critical Damage	struct	16 byte struct uint16 - Critical Damage (0-13) uint16 - Unused float32 - Critical % Mult (0-1.5) uint32 - Flags 0x01 Critical Effect on Death formID - Critical Spell Effect (SPEL) SSE version: 24 byte struct uint16 - Critical Damage uint16 - Unknown float32 - Critical % Mult uint32 - Flags 0x01 Critical Effect on Death uint32 - Unknown formID - Critical Spell Effect (SPEL) uint32 - Unknown
+		DATA	data	struct[10]
			value	int32
			weight	float
			damage	int16	Base damage.
+		DESC	description	lstring
+		DNAM	Weapon data	struct[100]
			00:Anim Type	uint8	Lookup: 0=Other, 1=OneHandSword, 2=OneHandDagger, 3=OneHandAxe, 4=OneHandMace, 5=TwoHandSword, 6=TwoHandAxe, 7=Bow, 8=Staff, 9=Crossbow 0 is used by the "Unarmed" weapon, the weapon versions of the knife and fork, and the unpatched woodcutter's axe.
			01	int8	unknown
			02	in16	unknown
			04:Speed	float	Speed of weapon.
			08:Reach	float	For melee weapons, this is a multiplier used in the reach formula: fCombatDistance * NPCScale * WeaponReach (where fCombatDistance is a gamesetting).
			0C:Flags	uint16	Flags. Known flag values include: 0x01: Ignores Normal Weapon Resistance (probably an obsolete holdover from Oblivion) 0x02: Automatic 0x04: Has Scope 0x08: Can't Drop 0x10: Hide Backpack 0x20: Embedded Weapon 0x40: Don't Use 1st Person IS Animations (or Don't Use 3rd Person IS Animations -- always paired with 0x100 in third set of flags) 0x80: Unplayable (The checkbox display in the CK is "Playable", i.e. the inverse of this flag's value)
			0E:Flags?	uint16	Possibly more flags, but has a constant value of 145 (0x91) in all records
			10:Sight FOV	float	(deprecated?) The angle of view when using Iron Sights. Done by zooming in.
			14:Blank	uint32	0 in all records
			18:VATS to hit	uint8	Base VATS To-Hit Chance (possibly obsolete). Only values are 0 and 5
			19:Unknown	int8	-1 in all records
			1A:Projectiles	uint8	Number of projectiles per single ammo object (possibly obsolete). 1 in all records
			1B	int8	Embedded Weapon: Actor Value, adding 46 to the stored value gives the actor value index, CK allows (0 PerceptionCondition through 6 BrainCondition), only valid if Embedded Weapon flag is set
			1C:Min Range	float	Tells combat AI they don't need to be closer than this value.
			20:Max Range	float	Tells combat AI they don't want to be any further away than this value.
			24:Unknown	uint32	0 in all records
			28:Flags	uint32	Flags. Known flag values include: 0x01: Player Only 0x02: NPCs Use Ammo 0x04: No Jam After Reload 0x10: Minor Crime 0x20: Fixed Range 0x40: Not Used in Normal Combat 0x100: Don't Use 3rd Person IS Animations (or Don't Use 1st Person IS Animations -- always paired with 0x40 in first set of flags) 0x200: Burst Shot 0x400: Alternate Rumble 0x800: Long bursts 0x1000: Non-hostile 0x2000: Bound Weapon
			2C:Unknown	float	1 in all records
			30:Unknown	float	Values range from 0.1 to 5, but is not displayed in CK
			34:Rumble left	float	Rumble: left motor strength
			38:Rumble right	float	Rumble: right motor strength
			3C:Rumble duration	float	Rumble: duration
			40:Blank	uint32	0 in all records
			44:Blank	uint32	0 in all records
			48:Blank	uint32	0 in all records
			4C:Skill	int32	Skill governing weapon's use (for staves, this is a magic skill, not a weapon skill, but apparently ignored in that case). Provided as an actor value; -1 for weapons without a governing skill
			50:Blank	uint32	0 in all records
			54:Blank	uint32	0 in all records
			58:Resist	int32	Actor Value, CK allows 39 DamageResist through 44 MagicResist or -1 for None (always -1 in original files)
			5C:Blank	uint32	0 in all records
			60:Stagger	float	Stagger
-		EAMT	Enchantment Charge Amount	uint16
+		EDID	editorID	zstring	Max 0x200 bytes, including null terminator.
-		EITM	Enchantment	formID	Points to a ENCH.
-		ETYP	Equip Type	formID	Specifies which equipment slot is used by the weapon (typically "BothHands" or "EitherHand"). Points to a EQUP.
+		FULL	Name	lstring
-		INAM	unknown	formID	Normal weapon swing impact set. Points to a IPDS.
-		KSIZ	keywordCount	uint32
-		KWDA	keywords	formID[KSIZ.keywordCount]
+		OBND	objectBounds	OBND
+		MODL	Model File Name	zstring
-		MODS	Alternate textures	Alternate Textures	Used when overriding textures in a nif file with texture sets
-		MODT	unknown	Model Textures
-		NAM7	unknown	formID	Attack Loop Sound (SNDR) Not found in original files
-		NAM8	unknown	formID	UnEquip Sound (SNDR)
-		NAM9	unknown	formID	Equip Sound (SNDR).
-		NNAM	unknown	zstring	Embedded Weapon Node
-		SNAM	unknown	formID	Attack Sound (Trap Fire) (SNDR)
-		TNAM	unknown	formID	Attack Fail Sound (SNDR).
-		UNAM	unknown	formID	Idle Sound (SNDR)
-		VMAD	unknown	VMAD
+		VNAM	Sound Detection Level	uint32	The amount of sound using the weapon generates, seems to be used in determining nearby NPCs detection of the actor using the weapon. 2(0x02) = Silent, 1(0x01) = Normal, 0(0x00) = Loud, 3(0x03) = Very Loud.
-		WNAM	unknown	formID	1st Person Model Object. Points to a STAT. Affects the Inventory Item display.
-		XNAM	unknown	formID	Attack Sound (2D) (SNDR) found in Dawnguard.esm
-		YNAM	unknown	formID	Pickup Sound (SNDR) not found in original files
-		ZNAM	unknown	formID	Putdown Sound (SNDR) not found in original files

The skill influencing the weapon damage and receiving xp is found in DNAM.Skill .

The use cost for staves (per use or per second) and enchanted weapons is the enchantment_cost. It is modified by the skills found in the effects of the enchantment (DATA.Skill), which may be none.

For unenchanted weapons the gold value is found in DATA.Value - called base_value in the following. For enchanted weapons the CK shows only the base_value, but that's not what's used ingame:

 gold_value = base_value + [0.12*EAMT + 8*enchantment_cost]

A missing EAMT field is treated as 0.

The following game settings can be changed to modify that formula:
fEnchantmentPointsMult = 0.12
fEnchantmentEffectPointsMult = 8

Notes

• What skill governs a weapon is set separately (under Weapon Data: 4C: Skill) from its Anim Type (Weapon Data: 00: Anim Type) which is separate from its ETYP which is separate from its keywords, such as "WeapTypeBattleaxe".
  • Skill determines what skill governs the weapon.
  • Perks, magic effects, etc can check whatever they want to in general to apply to something, but they usually check keywords.
  • ETYP is purely how many hands the weapon needs; for example, the unpatched Ebony Blade and Headsman's Axe were both one-handed weapons with an ETYP of both hands.
• Keywords can also specify the weapon material (e.g., "WeapMaterialIron"), which is primarily used for smithing and matching set purposes, and whether the weapon is sold by merchants ("VendorItemWeapon").