Psionic Equations - Revision history

Magic9mushroom: /* Distance */ Wrong sign.

2016-05-11T05:04:26Z

Distance: Wrong sign.

← Older revision		Revision as of 05:04, 11 May 2016
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	Distance for 0% MC = AS - DS - 0 + 25 = '''AS - DS + 25'''		Distance for 0% MC = AS - DS - 0 + 25 = '''AS - DS + 25'''

	For Panic instead of MC, ~~'''subtract'''~~ 20. (The "concentric rings" for Panic success are 20 tiles ~~closer to~~ the attacker.)		For Panic instead of MC, add 20. (The "concentric rings" for Panic success are 20 tiles further from the attacker.)

	As you may have guessed, the outer distance/radius is '''''R'''''+56. In other words, the outer, 0% circle is 56 tiles radius farther than the inner circle of 100%. Compare that a 5x5 tileset map is only 75 tiles across at its widest diagional... there's a ''huge'' area within the inner and outer circles!		As you may have guessed, the outer distance/radius is '''''R'''''+56. In other words, the outer, 0% circle is 56 tiles radius farther than the inner circle of 100%. Compare that a 5x5 tileset map is only 75 tiles across at its widest diagional... there's a ''huge'' area within the inner and outer circles!


	= Psi Stats versus Psi Strengths =		= Psi Stats versus Psi Strengths =

Magic9mushroom: /* The OSG Speaks */ corrected mixup

2015-05-05T04:30:07Z

The OSG Speaks: corrected mixup

← Older revision		Revision as of 04:30, 5 May 2015
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	*The slope factor ('''100/56''') is missing		*The slope factor ('''100/56''') is missing
	*The '''distance''' factor was not shown (1 per tile)		*The '''distance''' factor was not shown (1 per tile)
	*The '''constants''' (OSG 10 ~~and 30~~ versus actual values of 25 and 45) are 15 points low. Also, as presented (as part of the Defense Strength which is subtracted), they result in ''negative'' values which are ''subtracted'', when the constant should be ''added''. This leads to a final variance of '''-35''' for Panic attacks (+25 missing, then -10 more) and '''-75''' for MC (+45 missing, then -30 more), versus the correct results.		*The '''constants''' (OSG -30 and -10 versus actual values of 25 and 45) are 55 points low.
	The absence of the 50 AS divisor was probably the most egregious omission (a.k.a., "these numbers don't make a bit of sense!"), although the constants being so far off didn't help one bit. One could've gotten a close approximation (results that at least made some sense in the game) if only the slope and distance factors had been omitted. But notice how the OSG author himself (David Ellis) lists an incorrect example - how'd he ever get 950 for a Defense Strength?		The absence of the 50 AS divisor was probably the most egregious omission (a.k.a., "these numbers don't make a bit of sense!"), although the constants being so far off didn't help one bit. One could've gotten a close approximation (results that at least made some sense in the game) if only the slope and distance factors had been omitted. But notice how the OSG author himself (David Ellis) lists an incorrect example - how'd he ever get 950 for a Defense Strength?

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	Be that as it may... due to incompleteness, the OSG's psi equations have long frustrated players attempting to use them.		Be that as it may... due to incompleteness, the OSG's psi equations have long frustrated players attempting to use them.


	= Note =		= Note =

Hobbes at 04:03, 23 July 2013

2013-07-23T04:03:10Z

← Older revision		Revision as of 04:03, 23 July 2013
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	[[Category:Soldiers]]		[[Category:Soldiers]]
			[[Category:Enemy Unknown/UFO Defense]]

MikeTheRed: /* X-COM Vs. Aliens */ more explanation for this graphic

2012-09-12T16:16:57Z

X-COM Vs. Aliens: more explanation for this graphic

← Older revision		Revision as of 16:16, 12 September 2012
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	= X-COM Vs. Aliens =		= X-COM Vs. Aliens =

	[[image:PsiStatsVersusMuton.png\|right\|thumb\|200px\|Surface chart of X-COM PST and PSK for chance of MC on a muton (DS 25) at distance 25]]For every alien at a given distance, a surface (3D) graph of the PST and PSK needed to psionically attack can be made (see inset). But due to the fact that Psi Strength never changes for a given soldier, it's probably easier to consider PST as fixed, in which case only Psi Skill varies - which makes for a simple line equation (Psi Skill vs. Attack Strength, where AS equals percent Panic or MC success).		[[image:PsiStatsVersusMuton.png\|right\|thumb\|200px\|Surface chart of X-COM PST and PSK for chance of MC on a muton (DS 25) at distance 25. If PST and PSK are both low, there's no chance (the red in the spreadsheet). If they're both high, then it's guaranteed (blue).]]For every alien at a given distance, a surface (3D) graph of the PST and PSK needed to psionically attack can be made (see inset). But due to the fact that Psi Strength never changes for a given soldier, it's probably easier to consider PST as fixed, in which case only Psi Skill varies - which makes for a simple line equation (Psi Skill vs. Attack Strength, where AS equals percent Panic or MC success).

	Along these lines, a table can be made that shows the Psi Skill that a soldier with high Psi Strength (PST 90) needs for a guaranteed (100% AS) chance to Mind Control an alien. Because Psi Strength is [[Raw_recruit_statistical_likelihood\|randomly determined for recruits]], 10% of your soldiers will have PST 90 or higher.		Along these lines, a table can be made that shows the Psi Skill that a soldier with high Psi Strength (PST 90) needs for a guaranteed (100% AS) chance to Mind Control an alien. Because Psi Strength is [[Raw_recruit_statistical_likelihood\|randomly determined for recruits]], 10% of your soldiers will have PST 90 or higher.

MikeTheRed: /* X-COM Vs. Aliens */

2009-07-03T00:34:56Z

X-COM Vs. Aliens

← Older revision		Revision as of 00:34, 3 July 2009
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	'''* "=PSK"''' is the Psi Skill needed for 100% MC, for a soldier with PST 90.		'''* "=PSK"''' is the Psi Skill needed for 100% MC, for a soldier with PST 90.

			: 207 Psi Attack Strength is the upper critical value. Psi Strength x Psi Skill = 10350, so 100 psi strength and 104 psi skill, or some similiar combinations will do it. This figure will give a soldier 100% chance to mind control a Superhuman Sectopod/Cyberdisk from 90 tiles away... which is the maximum in the game (from 1 base corner tile to the opposite corner tile)
			::Hi Jasonred, sorry for delay in responding. The farthest distance is 75 using the [[Explosions#Distance_from_Ground_Zero\|Walking TUs]] method, which needs a 222 Attack Strength for a 100% MC chance on the Cyberdisk or Sectopod. Unless I am missing something about XCOM distances or the Psi formula... in which case, please let me know! Otherwise we might remove these two comments. I like your next paragraph, though... I never thought of that, but it's true (and interesting). "Psi retard"... hehehe -[[User:MikeTheRed\|MikeTheRed]] 20:34, 2 July 2009 (EDT)

	: 207 Psi Attack Strength is the upper critical value. Psi Strength x Psi Skill = 10350, so 100 psi strength and 104 psi skill, or some similiar combinations will do it. This figure will give a soldier 100% chance to mind control a Superhuman Sectopod/Cyberdisk from 90 tiles away... which is the maximum in the game (from 1 base corner tile to the opposite corner tile)		Even a soldier with theoretical 0 AS aka ZERO psi skill/strength/attack has a 29% chance to panic a Muton from a distance of zero (directly above or below). He can't activate a Psi-Amp without at least 1 Psi Skill; assuming 1 Psi Strength and 1 Psi Skill (impossible under normal gameplay since the first month of psi training gives more than 10 skill - but the difference is negligible in this example), even this Psi retarded individual has a 1.8% chance of panicking a Muton at 15 distance for superhuman, and 19 distance on beginner.
	~~According to the above formula, even~~ a soldier with 0 AS aka ZERO psi skill/strength/ attack has a 29% chance to panic a Muton from a distance of zero. (directly above or below). ~~But he~~ can't activate a Psi-Amp without at least 1 Psi Skill~~. Assuming~~ 1 Psi Strength and 1 Psi Skill (impossible under normal gameplay since the first month of psi training gives more than 10 skill~~...~~ but the difference is negligible in this example~~...~~), even this Psi retarded individual has a 1.8% chance of panicking a Muton at~~...~~ 15 distance for superhuman, and 19 distance on beginner.

	= Aliens Vs. X-COM =		= Aliens Vs. X-COM =

Jasonred: /* X-COM Vs. Aliens */

2009-03-23T09:49:24Z

X-COM Vs. Aliens

← Older revision		Revision as of 09:49, 23 March 2009
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	'''* "=PSK"''' is the Psi Skill needed for 100% MC, for a soldier with PST 90.		'''* "=PSK"''' is the Psi Skill needed for 100% MC, for a soldier with PST 90.


			: 207 Psi Attack Strength is the upper critical value. Psi Strength x Psi Skill = 10350, so 100 psi strength and 104 psi skill, or some similiar combinations will do it. This figure will give a soldier 100% chance to mind control a Superhuman Sectopod/Cyberdisk from 90 tiles away... which is the maximum in the game (from 1 base corner tile to the opposite corner tile)
			According to the above formula, even a soldier with 0 AS aka ZERO psi skill/strength/ attack has a 29% chance to panic a Muton from a distance of zero. (directly above or below). But he can't activate a Psi-Amp without at least 1 Psi Skill. Assuming 1 Psi Strength and 1 Psi Skill (impossible under normal gameplay since the first month of psi training gives more than 10 skill... but the difference is negligible in this example...), even this Psi retarded individual has a 1.8% chance of panicking a Muton at... 15 distance for superhuman, and 19 distance on beginner.

	= Aliens Vs. X-COM =		= Aliens Vs. X-COM =

Zombie: /* See Also */ Relinking.

2009-01-02T02:56:39Z

Zombie: /* See Also */ Relinking.

2009-01-02T02:34:28Z

Zombie: /* Aliens Vs. X-COM */ Relinking.

2008-12-17T21:13:45Z

Aliens Vs. X-COM: Relinking.

← Older revision		Revision as of 21:13, 17 December 2008
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	Additional notes:		Additional notes:
	*The DS 0 to DS 100 columns reflect the distribution of Defense Strength for psi-locked [[Raw recruit statistical likelihood\|soldiers]].		*The DS 0 to DS 100 columns reflect the distribution of Defense Strength for psi-locked [[Raw recruit statistical likelihood\|soldiers]].
	*Elevation does not affect psionics. On a number of [[UFOs]] ([[Abductor]], [[Harvester]], and [[Supply Ship]]), you are very "close" to aliens on the bridge as you enter the ship. Indeed, if you are directly under them, you are at '''''distance 0''''', even if they're on the third floor. None of the information on this page directly addresses distances of 0... you'd actually need a DS of 112 to be invulnerable to MC if directly under (or over) an Ethereal Commander.		*Elevation does not affect psionics. On a number of [[UFOs]] ([[Abductor]], [[Harvester]], and [[Supply ship\|Supply Ship]]), you are very "close" to aliens on the bridge as you enter the ship. Indeed, if you are directly under them, you are at '''''distance 0''''', even if they're on the third floor. None of the information on this page directly addresses distances of 0... you'd actually need a DS of 112 to be invulnerable to MC if directly under (or over) an Ethereal Commander.
	*In the early days - before you get psi - only about 10% of your crew will be invulnerable to MC by Sectoid Leaders. So if you have 20 soldiers, only about 2 will never lose their wits. Still, it takes a DS 40 to be 100% vulnerable... over half your crew will be better than this. Furthermore...		*In the early days - before you get psi - only about 10% of your crew will be invulnerable to MC by Sectoid Leaders. So if you have 20 soldiers, only about 2 will never lose their wits. Still, it takes a DS 40 to be 100% vulnerable... over half your crew will be better than this. Furthermore...
	*Psi-active aliens like to waste their TUs on your wimpiest soldiers, leaving the others free to act.		*Psi-active aliens like to waste their TUs on your wimpiest soldiers, leaving the others free to act.

Zombie: /* Aliens Vs. X-COM */ Redirecting.

2007-02-01T16:10:00Z

Aliens Vs. X-COM: Redirecting.

← Older revision		Revision as of 16:10, 1 February 2007
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	Additional notes:		Additional notes:
	*The DS 0 to DS 100 columns reflect the distribution of Defense Strength for psi-locked [[Raw recruit statistical likelihood\|soldiers]].		*The DS 0 to DS 100 columns reflect the distribution of Defense Strength for psi-locked [[Raw recruit statistical likelihood\|soldiers]].
	*Elevation does not affect psionics. On a number of [[~~UFO (UFO Defense)\|~~UFOs]] ([[Abductor]], [[Harvester]], and [[Supply Ship]]), you are very "close" to aliens on the bridge as you enter the ship. Indeed, if you are directly under them, you are at '''''distance 0''''', even if they're on the third floor. None of the information on this page directly addresses distances of 0... you'd actually need a DS of 112 to be invulnerable to MC if directly under (or over) an Ethereal Commander.		*Elevation does not affect psionics. On a number of [[UFOs]] ([[Abductor]], [[Harvester]], and [[Supply Ship]]), you are very "close" to aliens on the bridge as you enter the ship. Indeed, if you are directly under them, you are at '''''distance 0''''', even if they're on the third floor. None of the information on this page directly addresses distances of 0... you'd actually need a DS of 112 to be invulnerable to MC if directly under (or over) an Ethereal Commander.
	*In the early days - before you get psi - only about 10% of your crew will be invulnerable to MC by Sectoid Leaders. So if you have 20 soldiers, only about 2 will never lose their wits. Still, it takes a DS 40 to be 100% vulnerable... over half your crew will be better than this. Furthermore...		*In the early days - before you get psi - only about 10% of your crew will be invulnerable to MC by Sectoid Leaders. So if you have 20 soldiers, only about 2 will never lose their wits. Still, it takes a DS 40 to be 100% vulnerable... over half your crew will be better than this. Furthermore...
	*Psi-active aliens like to waste their TUs on your wimpiest soldiers, leaving the others free to act.		*Psi-active aliens like to waste their TUs on your wimpiest soldiers, leaving the others free to act.
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	While all of this is true, don't forget that you typically have many decent psi-unlocked soldiers pretty soon after getting psi, each of whom will get 2 or 3 psi attempts. Combined with the fact that aliens will be going for your wimpiest dudes, chances are very good that you can successfully psi attack even Ethereal Commanders before they successfully attack all of your guys, as we've all seen.		While all of this is true, don't forget that you typically have many decent psi-unlocked soldiers pretty soon after getting psi, each of whom will get 2 or 3 psi attempts. Combined with the fact that aliens will be going for your wimpiest dudes, chances are very good that you can successfully psi attack even Ethereal Commanders before they successfully attack all of your guys, as we've all seen.


	= The OSG Speaks =		= The OSG Speaks =

← Older revision		Revision as of 02:56, 2 January 2009
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	*[[Psionics]]		*[[Psionics]]
	*[[Psionic Strength]]		*[[Psionic Strength]]
	*[[~~Psi_Skill~~]]		*[[Psionic Skill]]
	*[[Field Manual: Psionics]]		*[[Field Manual: Psionics]]
	*[[Psionic Laboratory\|Psi-Lab]]		*[[Psionic Laboratory\|Psi-Lab]]

← Older revision		Revision as of 02:34, 2 January 2009
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	*[[Psionics]]		*[[Psionics]]
	*[[~~Psi_Strength~~]]		*[[Psionic Strength]]
	*[[Psi_Skill]]		*[[Psi_Skill]]
	*[[Field Manual: Psionics]]		*[[Field Manual: Psionics]]