Talk:Accuracy formula - Revision history

NKF: /* Most recent edit */

2015-08-17T09:52:49Z

Most recent edit

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	Oh, I think I see what's going on. The stats screen of a unit reports Firing Accuracy as being penalised by that "current health/max health" factor, while the shot selection screen when you're using a weapon (and, I'm pretty sure, the actual firing algorithm) uses "0.75 + 0.25 * current health/max health". [[Known Bugs]] material, you think? [[User:Magic9mushroom\|Magic9mushroom]] ([[User talk:Magic9mushroom\|talk]]) 05:03, 17 August 2015 (EDT)		Oh, I think I see what's going on. The stats screen of a unit reports Firing Accuracy as being penalised by that "current health/max health" factor, while the shot selection screen when you're using a weapon (and, I'm pretty sure, the actual firing algorithm) uses "0.75 + 0.25 * current health/max health". [[Known Bugs]] material, you think? [[User:Magic9mushroom\|Magic9mushroom]] ([[User talk:Magic9mushroom\|talk]]) 05:03, 17 August 2015 (EDT)

			: Definitely. The game has a number of information screens with erroneous or omitted data, so we appear to have another one. [[User:NKF\|NKF]] ([[User talk:NKF\|talk]]) 05:52, 17 August 2015 (EDT)

Magic9mushroom: /* Most recent edit */

2015-08-17T09:03:08Z

Most recent edit

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	: The health multiplier is indeed 0.75 + (0.25 * current health/max health). The simpler health/max health formula was what we worked out originally until we learned more about how health relates to accuracy. Let's fix that. [[User:NKF\|NKF]] ([[User talk:NKF\|talk]]) 03:42, 17 August 2015 (EDT)		: The health multiplier is indeed 0.75 + (0.25 * current health/max health). The simpler health/max health formula was what we worked out originally until we learned more about how health relates to accuracy. Let's fix that. [[User:NKF\|NKF]] ([[User talk:NKF\|talk]]) 03:42, 17 August 2015 (EDT)

			Oh, I think I see what's going on. The stats screen of a unit reports Firing Accuracy as being penalised by that "current health/max health" factor, while the shot selection screen when you're using a weapon (and, I'm pretty sure, the actual firing algorithm) uses "0.75 + 0.25 * current health/max health". [[Known Bugs]] material, you think? [[User:Magic9mushroom\|Magic9mushroom]] ([[User talk:Magic9mushroom\|talk]]) 05:03, 17 August 2015 (EDT)

NKF: /* Most recent edit */

2015-08-17T07:42:16Z

Most recent edit

← Older revision		Revision as of 07:42, 17 August 2015
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	Could someone with some more knowledge than myself comment on this? [[User:Magic9mushroom\|Magic9mushroom]] ([[User talk:Magic9mushroom\|talk]]) 03:11, 17 August 2015 (EDT)		Could someone with some more knowledge than myself comment on this? [[User:Magic9mushroom\|Magic9mushroom]] ([[User talk:Magic9mushroom\|talk]]) 03:11, 17 August 2015 (EDT)

			: The health multiplier is indeed 0.75 + (0.25 * current health/max health). The simpler health/max health formula was what we worked out originally until we learned more about how health relates to accuracy. Let's fix that. [[User:NKF\|NKF]] ([[User talk:NKF\|talk]]) 03:42, 17 August 2015 (EDT)

Magic9mushroom: /* Most recent edit */ new section

2015-08-17T07:11:07Z

Most recent edit: new section

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	--[[User:Volutar\|Volutar]] 07:47, 11 November 2013 (EST)		--[[User:Volutar\|Volutar]] 07:47, 11 November 2013 (EST)

			== Most recent edit ==

			The most recent edit to this article (in 2013) changed the "health modifier" to a simple "current health/max health".

			I know this is wrong, because I've had soldiers on 1 HP (which is logically at most 4% of their maximum) with displayed double-digit chances to hit. I don't know if the previously-listed "0.75 + 0.25*current health/max health" is correct or not, but I know that the one up there at the moment can't possibly be right.

			Could someone with some more knowledge than myself comment on this? [[User:Magic9mushroom\|Magic9mushroom]] ([[User talk:Magic9mushroom\|talk]]) 03:11, 17 August 2015 (EDT)

Volutar: deviation non uniformity

2013-11-11T12:47:43Z

deviation non uniformity

← Older revision		Revision as of 12:47, 11 November 2013
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	[[User:EsTeR\|EsTeR]] 07:08, 22 March 2012 (EDT)		[[User:EsTeR\|EsTeR]] 07:08, 22 March 2012 (EDT)

			===non-uniform spreading===
			It's clearly that shooting along X axis has lower accuracy than shooting along Y axis. Diagonal shoots are also wide spreaded.
			There are 2 kinds of areas in these sets:
			A) hit area - almost doesn't have any deviations.
			B) miss area - is quite deviated, depends on distance and angle (non uniform).
			For accuracy 0 there's no hit area - everything is covered by miss area, though it doesn't mean it can't hit at all. There are small chances.
			For accuracy 109 there's no miss area (doesn't matter if it gone beyond109). Though "hit" spot has size 2x2x2 voxels, so it's possible that projectile will hit obstacle with chance.
			Vertical (z) spread is 1/2 of x/y.
			There's also some x/y spreading addition when Z of origin and Z of target are differ. And the more difference of Z, the more x/y addition it has.

			[[File:Accuracy_areas_above.gif]]

			--[[User:Volutar\|Volutar]] 07:47, 11 November 2013 (EST)

EsTeR: oops

2012-03-22T11:09:40Z

oops

← Older revision		Revision as of 11:09, 22 March 2012
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	Used: Xcom 1 CE pure, win98 (no dosbox)		Used: Xcom 1 CE pure, win98 (no dosbox)

	Editor Weapon: UFOMOD v1.0 (Chris Voss)		Editor Weapon: UFOMOD v1.0 (Chris Voss)

	Editor Soldier: UFOSAVED v2.3 {Victor Fernandez Martinez}		Editor Soldier: UFOSAVED v2.3 {Victor Fernandez Martinez}
	~~[[User:EsTeR\|EsTeR]] 07:08, 22 March 2012 (EDT)~~
	[[User:EsTeR\|EsTeR]] 07:08, 22 March 2012 (EDT)		[[User:EsTeR\|EsTeR]] 07:08, 22 March 2012 (EDT)

EsTeR: WHAT IS THIS SORCERY?????

2012-03-22T11:08:28Z

WHAT IS THIS SORCERY?????

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	Confirmed that aproximately 170% editor value for gun accuracy is best using any type of shot (when the soldier is at maximum accuracy). Although I doubt that 318% is correct! [[User:EsTeR\|EsTeR]] 06:39, 22 March 2012 (EDT)		Confirmed that aproximately 170% editor value for gun accuracy is best using any type of shot (when the soldier is at maximum accuracy). Although I doubt that 318% is correct! [[User:EsTeR\|EsTeR]] 06:39, 22 March 2012 (EDT)

			'''UPDATE 2 '''
			Changed weapon accuracy in editor to 228%, 229%, 230%.
			Used a soldier with 125 accuracy and got these values:

			Not Kneeling (in-game chance to hit): 285%, 286%, 287%.
			Kneeling: 326%, 327%, -326%

			'''WHAT!?!?''' With a soldier at absolute maximum accuracy (of 125), the absolute best accuracy you should give a weapon when editing them is:

			229%

			giving an ingame chance-to-hit of:

			327%.

			although I only used a standard rifle for this test, I cannot see how this would affect any other guns or launchers.

			Used: Xcom 1 CE pure, win98 (no dosbox)
			Editor Weapon: UFOMOD v1.0 (Chris Voss)
			Editor Soldier: UFOSAVED v2.3 {Victor Fernandez Martinez}
			[[User:EsTeR\|EsTeR]] 07:08, 22 March 2012 (EDT)
			[[User:EsTeR\|EsTeR]] 07:08, 22 March 2012 (EDT)

EsTeR: just tested.

2012-03-22T10:39:12Z

just tested.

← Older revision		Revision as of 10:39, 22 March 2012
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	Try to use a safe approach and limit the game behaving badly by using a conservative ''maximum gun accuracy'' in your editor of 170%. I'm pretty sure I have it correct. [[User:EsTeR\|EsTeR]] 06:07, 22 March 2012 (EDT)		Try to use a safe approach and limit the game behaving badly by using a conservative ''maximum gun accuracy'' in your editor of 170%. I'm pretty sure I have it correct. [[User:EsTeR\|EsTeR]] 06:07, 22 March 2012 (EDT)

			'''UPDATE'''
			Just tested this:
			Soldier: Acc=125
			Edited Rifle Accuracy: '''170%''' Aimed, 250% Snap, 255% Auto.

			Chance to hit (NOT kneeling): 212% Aimed, 312% Snap, 318% Auto.
			Chance to hit (kneeling): 243% Aimed, -297% Snap, -290% Auto.

			Confirmed that aproximately 170% editor value for gun accuracy is best using any type of shot (when the soldier is at maximum accuracy). Although I doubt that 318% is correct! [[User:EsTeR\|EsTeR]] 06:39, 22 March 2012 (EDT)

EsTeR: Just something i found when playing with any weapon editor.

2012-03-22T10:07:36Z

Just something i found when playing with any weapon editor.

← Older revision		Revision as of 10:07, 22 March 2012
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	:Note that the game does appear to apply it as a bonus, and rounds it down. So in cases like the example NKF posted (the tank with 2hp left) you take the full -25%. - <span style="font-size:xx-small"> [[User:Bomb_Bloke\|Bomb Bloke]] ([[User_talk:Bomb_Bloke\|Talk]]/[[Special:Contributions/Bomb_Bloke\|Contribs]])</span> 17:13, 5 March 2012 (EST)		:Note that the game does appear to apply it as a bonus, and rounds it down. So in cases like the example NKF posted (the tank with 2hp left) you take the full -25%. - <span style="font-size:xx-small"> [[User:Bomb_Bloke\|Bomb Bloke]] ([[User_talk:Bomb_Bloke\|Talk]]/[[Special:Contributions/Bomb_Bloke\|Contribs]])</span> 17:13, 5 March 2012 (EST)

			== Maximum Gun Accuracy ==
			Soldier Kneeling Bonus = +15%.

			Max Soldier Accuracy = 125% '''Best Case''' or 120% '''Typical'''.

			'''Max Engine''' Accuracy = 254% (250% to be '''Safe''')


			Best Case Multiplier:
			1.15 x 1.25 = 1.4375 (Kneeling Bonus X Absolute Max Accuracy = Multiplier)

			Typical Multiplier:
			1.15 x 1.20 = 1.38 (Kneeling Bonus X Typcial Max Accuracy = Multiplier)

			==== ABSOLUTELY the Maximum Accuracy percentages to be used in an editor if using these settings:====
			Max Engine & Best Case:
			254 / 1.4375 = 176.695652 (176%)

			Safe Engine & Best Case:
			250 / 1.4375 = 173.913043 (173%)

			Max Engine & Typical:
			254 / 1.38 = 184.0580 (184%)

			Safe Engine & Typical:
			250 / 1.38 = 181.159420 (181%)

			===What This Means===
			When editing a gun for absolute best accuracy rating (when doing auto,snap or aimed) you cannot (or rather really shouldn't) go over 254% Chance to Hit. Since kneeling and maximum soldier accuracy are the only two the matter (since everything else will decrease the chance to hit. eg: fatal wounds, two handed weap using one hand etc. etc.), just making a gun (in your editor) at 254% accuracy will give an in-game best chance to hit of 365%. Since this is over the 255 wrap-around, your gun will end up being garbage!

			Try to use a safe approach and limit the game behaving badly by using a conservative ''maximum gun accuracy'' in your editor of 170%. I'm pretty sure I have it correct. [[User:EsTeR\|EsTeR]] 06:07, 22 March 2012 (EDT)

Bomb Bloke: /* Percentage of life lost? or remaining? */

2012-03-05T22:13:37Z

Percentage of life lost? or remaining?

← Older revision		Revision as of 22:13, 5 March 2012
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	The formula on the page, as stated, implies that your accuracy gets better as your health goes down. (75% + 25% * percentage life lost) means that it would be a 75% multiplier at full health, and a 100% multiplier (or non factor) when you're dead. I'm assuming that this is a mistype and not the actual formula, just from a common sense perspective, and that it should read (75% + 25% * percentage of life remaining) which would add up to 100% at full health, approaching 75% as you near death.--[[User:Twilightdusk\|Twilightdusk]] 13:03, 5 March 2012 (EST)		The formula on the page, as stated, implies that your accuracy gets better as your health goes down. (75% + 25% * percentage life lost) means that it would be a 75% multiplier at full health, and a 100% multiplier (or non factor) when you're dead. I'm assuming that this is a mistype and not the actual formula, just from a common sense perspective, and that it should read (75% + 25% * percentage of life remaining) which would add up to 100% at full health, approaching 75% as you near death.--[[User:Twilightdusk\|Twilightdusk]] 13:03, 5 March 2012 (EST)

			:Too silly mistakes I made in a row! Got it stuck in my head that it was a penalty, then went and wrote an equation that applied it as a bonus.

			:Note that the game does appear to apply it as a bonus, and rounds it down. So in cases like the example NKF posted (the tank with 2hp left) you take the full -25%. - <span style="font-size:xx-small"> [[User:Bomb_Bloke\|Bomb Bloke]] ([[User_talk:Bomb_Bloke\|Talk]]/[[Special:Contributions/Bomb_Bloke\|Contribs]])</span> 17:13, 5 March 2012 (EST)