Extra extra8 - Revision history

Doom64hunter at 09:26, 6 February 2022

2022-02-06T09:26:12Z

← Older revision		Revision as of 02:26, 6 February 2022
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	~~This variable~~ tracks ~~additional~~, ~~fractional~~ damage which is to be applied to the player. This value is initialized to zero.		[[extra_extra8]] tracks fractional, or timed damage which is to be applied to the player once the stored value is greater or equal to 256. This value is initialized to zero at map start, and is reset to 0 every time the damage is applied to the player's health.

	~~The damage will only be applied as soon as~~ the ~~stored~~ value is ~~greater or equal to 256~~. ~~If this is the case~~, ~~the~~ value ~~will be reset~~ to 0.		Internally, the value of <code>extra_extra8</code> is right shifted by 8, and then subtracted from the player's HP. Therefore, a value of 256 is equal to 1 unit of HP.

	The only hardcoded use for [[extra_extra8]] is to track the amount of drowning damage the player has taken.		The only current hardcoded use for <code>extra_extra8</code> is to track the amount of drowning damage the player has taken. Drowning damage is incremented in <code>extra_extra8</code> by 32 each tic, hence the player will have his health subtracted by 1 every 8 tics.

	~~The value is~~ used in the ~~function~~ <code>~~P_IncurDamage~~</code>~~, which corresponds~~ to the ~~event [[EVENT_INCURDAMAGE]]. If [[extra_extra8]] is negative, it will heal~~ the player~~, but [[extra_extra8]] will not be reset to 0~~.		In the beta versions this was also used for burning damage when the player is set on fire. Mods can apply a similar increment to <code>extra_extra8</code> to apply the same kind of timed damage to the player.

	~~The actual~~ damage applied ~~to the player is~~ modified by [[shield_amount]]. ~~This behavior can be intercepted~~ in ~~the~~ [[~~EVENT_INCURDAMAGE~~]] [[~~events\|event~~]]		If <code>extra_extra8</code> is greater than 256, then the damage applied through this variable will also be modified by [[shield_amount]].

			It is possible to prevent applying the damage accumulated in <code>extra_extra8</code> by setting [[RETURN]] to -1 in the [[EVENT_INCURDAMAGE]] event. This will not prevent the damage from being accumulated in the variable, therefore this makes it possible to modify how drowning damage is applied to the player.

			== Negative Values ==

			'''IMPORTANT:''' Setting <code>extra_extra8</code> to a negative value will not work as expected!

			Negative values cause the player to be healed by at least 1 HP each tic. This occurs because right shifting a negative value will result in -1, not 0, if the absolute value of <code>extra_extra8</code> is smaller than 256.

			Due to a quirk in the engine, it will also not be reset to 0 after the healing is applied either, as such the healing will be continuous.

	[[Category:Player structure members]]		[[Category:Player structure members]]

Doom64hunter at 21:06, 5 February 2022

2022-02-05T21:06:10Z

← Older revision		Revision as of 14:06, 5 February 2022
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	This is initialized to zero. The [[~~player~~]] is ~~given this~~ amount of damage ~~divded by 256 (shift right by 8)~~. If ~~no actual damage~~ is ~~done~~, ~~then~~ the ~~value is~~ not ~~cleared~~. The actual damage applied to the player is modified by [[shield_amount]]. This behavior can be intercepted in the [[EVENT_INCURDAMAGE]] [[events\|event]]		This variable tracks additional, fractional damage which is to be applied to the player. This value is initialized to zero.

			The damage will only be applied as soon as the stored value is greater or equal to 256. If this is the case, the value will be reset to 0.

			The only hardcoded use for [[extra_extra8]] is to track the amount of drowning damage the player has taken.

			The value is used in the function <code>P_IncurDamage</code>, which corresponds to the event [[EVENT_INCURDAMAGE]]. If [[extra_extra8]] is negative, it will heal the player, but [[extra_extra8]] will not be reset to 0.

			The actual damage applied to the player is modified by [[shield_amount]]. This behavior can be intercepted in the [[EVENT_INCURDAMAGE]] [[events\|event]]

	[[Category:Player structure members]]		[[Category:Player structure members]]

LordMisfit at 22:41, 4 November 2007

2007-11-04T22:41:23Z

← Older revision		Revision as of 15:41, 4 November 2007
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	This is initialized to zero. The [[player]] is given this amount of damage divded by 256 (shift right by 8). If no actual damage is done, then the value is not cleared. The actual damage applied to the player is modified by [[shield_amount]]. This behavior can be intercepted in the EVENT_INCURDAMAGE [[events\|event]]		This is initialized to zero. The [[player]] is given this amount of damage divded by 256 (shift right by 8). If no actual damage is done, then the value is not cleared. The actual damage applied to the player is modified by [[shield_amount]]. This behavior can be intercepted in the [[EVENT_INCURDAMAGE]] [[events\|event]]

	[[Category:Player structure members]]		[[Category:Player structure members]]

TX at 23:32, 24 September 2005

2005-09-24T23:32:16Z

← Older revision		Revision as of 16:32, 24 September 2005
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	This is initialized to zero. The [[player]] is given this amount of damage divded by 256 (shift right by 8). If no actual damage is done, then the value is not cleared. The actual damage applied to the player is modified by [[shield_amount]]. This behavior can be intercepted in the EVENT_INCURDAMAGE [[events\|event]]		This is initialized to zero. The [[player]] is given this amount of damage divded by 256 (shift right by 8). If no actual damage is done, then the value is not cleared. The actual damage applied to the player is modified by [[shield_amount]]. This behavior can be intercepted in the EVENT_INCURDAMAGE [[events\|event]]

			[[Category:Player structure members]]

TX at 03:08, 11 February 2005

2005-02-11T03:08:26Z

← Older revision		Revision as of 20:08, 10 February 2005
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	This is initialized to zero. The [[player]] is given this amount of damage divded by 256 (shift right by 8). If no actual damage is done, then the value is not cleared. The actual damage applied to the player is modified by [[shield_amount]].		This is initialized to zero. The [[player]] is given this amount of damage divded by 256 (shift right by 8). If no actual damage is done, then the value is not cleared. The actual damage applied to the player is modified by [[shield_amount]]. This behavior can be intercepted in the EVENT_INCURDAMAGE [[events\|event]]

Matteus at 01:17, 11 February 2005

2005-02-11T01:17:11Z

New page

This is initialized to zero. The [[player]] is given this amount of damage divded by 256 (shift right by 8). If no actual damage is done, then the value is not cleared. The actual damage applied to the player is modified by [[shield_amount]].