Difference between revisions of "Invulnerability"

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== Sources ==
 
== Sources ==
 
* [http://toastytech.com/dooma/alpha4.html Doom 4-2 Alpha] at toastytech.com
 
* [http://toastytech.com/dooma/alpha4.html Doom 4-2 Alpha] at toastytech.com
* [http://groups.google.com/group/alt.games.doom/msg/55cac0778658fa8d?hl=en& alt.games.doom post about creating weapons that can kill invulnerable players], via [http://groups.google.com Google Groups]
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* [https://groups.google.com/group/alt.games.doom/msg/55cac0778658fa8d?hl=en& alt.games.doom post about creating weapons that can kill invulnerable players], via [https://groups.google.com Google Groups]
* [http://groups.google.com/group/rec.games.computer.doom.editing/msg/4e57a0c1446f8be3?hl=en& rec.games.computer.doom.editing post about creating weapons that can kill invulnerable players], via [http://groups.google.com Google Groups]
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* [https://groups.google.com/group/rec.games.computer.doom.editing/msg/4e57a0c1446f8be3?hl=en& rec.games.computer.doom.editing post about creating weapons that can kill invulnerable players], via [https://groups.google.com Google Groups]
  
 
{{Doom items}}
 
{{Doom items}}

Revision as of 18:36, 28 June 2017

An invulnerability found in Doom II MAP08: Tricks and Traps.

The invulnerability is a powerup that makes the player generally impervious to damage. The player is not protected from telefrags, and will still recoil from a successful attack. The powerup looks like a green sphere with a grinning red-eyed head inside. While it is active, the colors in the player's view change to inverse monochrome, and the eyes of the status bar face glow yellow (STFGOD0), making them look similar to the demon's. The inverted monochrome display makes the game effectively fully bright, and the player will be able to see every detail even in the darkest areas. Spectres in particular become much more visible under its effects.

Invulnerability lasts for 30 seconds; in the last few seconds the display will begin blinking back to its original colors. Picking up an invulnerability before a previous one has expired resets the duration to 30 seconds.

Invulnerability can also be activated with the cheat code idbeholdv.

In deathmatch mode of vanilla Doom, invulnerabilities and blur artifacts never respawn. Some source ports allow flags to be set to cause them to respawn.

Invulnerabilities are included in the items percentage displayed at the end of each level.

Technical

According to the function P_DamageMobj in p_inter.c, invulnerability only protects the player from attacks doing less than 1000 points of damage; while no monster in the game can do nearly that much damage in one attack, a telefrag inflicts 10000 points (and indeed will kill even an otherwise invulnerable player). This also means that DeHackEd can be used to circumvent the invulnerability powerup by creating incredibly powerful weapons.

Data

Invulnerability data
Thing type 2022 (decimal), 7E6 (hex)
Appears in Registered Doom
The Ultimate Doom
Doom II/Final Doom
Radius 20
Height 16
Sprite PINV
Class Item
Pickup

Appearance statistics

In the IWADs the invulnerability is first encountered on these maps per skill level:

The IWADs contain the following numbers of invulnerabilities per skill level:

Notes

The early invulnerability powerup, as seen in MBF's emulation of the Doom press release beta.
  • The grinning face inside the sphere appears to be derived from the lost soul sprite in Doom 0.4. Oddly enough, the invulnerability sphere in that version of the game was invisible and had an unused sprite in the IWAD which looked like a giant health bonus.
  • Due to a limitation of the engine, the invulnerability artifact lights up all the areas in the game similar to the light amplification visor. Otherwise it would require an entire table of 32 shades for a proper effect.

See also

Sources