Status bar face

In the center of the status bar, a player may see his character's face. It reacts to the environment in the game, as follows:


 * The face bleeds as the player's health diminishes. The health ranges corresponding to each face type are as follows:


 * Note that in the Sega Genesis 32X and Game Boy Advance ports, the status bar face does not bleed at all, although the rest of the features of damage (progressively messier hair, closed eyes when dead, etc.) are there.


 * In most versions, should the player die, the head becomes bowed, hair completely disheveled, eyes closed, and about as bloody as the 1% - 19% face. The face explodes when the player dies in the 3DO port, and when the player experiences a gibbing death in the Playstation 1 port.


 * The player turns to look in the direction from which a damaging hit originates. This gives a helpful visual cue as to the direction attacks are coming from.


 * If the player picks up a new weapon, the face displays a semi-evil grin momentarily.


 * If the player keeps firing a weapon repeatedly, or is taking damage, the face grits its teeth.


 * If the player is hurt, yet has a net gain of more than 20% health during the damaging event, a rarely displayed "ouch face" expression of shock and pain is shown (originally intended to represent a net loss of 20% health or more).


 * If the player is invulnerable (because "god mode" is active or the player has picked up an invulnerability artifact), the player has glowing golden eyes, similar to the Demon's.

Technical
The names of the face graphics have the form STF[type][health][frame], where the text [type] represents one of several conditions currently being experienced by the player, [health] is a digit denoting his approximate current health, and [frame] is an optional extra digit signifying a repeating animation sequence.

The possible values of [type] are:

Additionally, STFGOD0 appears while an invulnerability powerup or the iddqd cheat code is in effect. Note that in vanilla Doom, STFOUCH4 is never actually displayed due to the ouch face bug (the player cannot pick up objects after being killed, so he cannot gain more than 20% health and end up in the 1% - 19% range).

The number [health] can take on the following values:

The graphic STFDEAD0 takes over when the player is killed.

Trivia
Did you know that the face in Doom status bar is a Wolfenstein 3D reference?