Talk:Cold resistance - Revision history

Erica at 04:13, 22 August 2011

2011-08-22T04:13:14Z

← Older revision		Revision as of 04:13, 22 August 2011
Line 46:		Line 46:
	(11+20)/(17+27) = 0.73 which is closer to 67% than 33%.		(11+20)/(17+27) = 0.73 which is closer to 67% than 33%.

	:I know I'm responding to a post that is almost four years old... but yes, I think you are correct. I would guess that the person who wrote the spoiler thought that eating giants is like eating mind flayers, where you have a 50% change of telepathy and a 50% chance of +1 intelligence. For giants, you always get the strength increase, and you have a mlevel/15 chance of gaining the fire/cold/shock resistance. I am going to correct other pages based on this ([[Frost giant]], [[Fire giant~~]], [[Fire resistance~~]]). --[[User:Erica\|Erica]] 04:06, 22 August 2011 (UTC)		:I know I'm responding to a post that is almost four years old... but yes, I think you are correct. I would guess that the person who wrote the spoiler thought that eating giants is like eating mind flayers, where you have a 50% change of telepathy and a 50% chance of +1 intelligence. For giants, you always get the strength increase, and you have a mlevel/15 chance of gaining the fire/cold/shock resistance. I am going to correct other pages based on this ([[Frost giant]], [[Fire giant]]). --[[User:Erica\|Erica]] 04:06, 22 August 2011 (UTC)

Erica: other pages need to be fixed

2011-08-22T04:06:33Z

other pages need to be fixed

← Older revision		Revision as of 04:06, 22 August 2011
Line 45:		Line 45:
	Eating a tin of frost giant 27 times, I gained the intrinsic 20 times		Eating a tin of frost giant 27 times, I gained the intrinsic 20 times
	(11+20)/(17+27) = 0.73 which is closer to 67% than 33%.		(11+20)/(17+27) = 0.73 which is closer to 67% than 33%.

			:I know I'm responding to a post that is almost four years old... but yes, I think you are correct. I would guess that the person who wrote the spoiler thought that eating giants is like eating mind flayers, where you have a 50% change of telepathy and a 50% chance of +1 intelligence. For giants, you always get the strength increase, and you have a mlevel/15 chance of gaining the fire/cold/shock resistance. I am going to correct other pages based on this ([[Frost giant]], [[Fire giant]], [[Fire resistance]]). --[[User:Erica\|Erica]] 04:06, 22 August 2011 (UTC)

Addps4cat: cold resistance calc argument

2007-09-05T16:48:30Z

cold resistance calc argument

← Older revision		Revision as of 16:48, 5 September 2007
Line 1:		Line 1:
	I just dove through the source code for two hours and conducted a small trial and I think this [http://www.geocities.com/dcorbett42/nethack/corpse.htm] is wrong. Here is the basis for my argument:		I just dove through the source code for two hours and conducted a small trial and I think this [http://www.geocities.com/dcorbett42/nethack/corpse.htm\|Eating Corpses For Food And Intrinsics] is wrong. Here is the basis for my argument:

	The relevant portion of [[eat.c#640]]		The relevant portion of [[eat.c#640]]
Line 27:		Line 27:
	677. return; /* failed die roll */		677. return; /* failed die roll */

	And an example from [[Monst.c#1532]]		And an example from [[Monst.c#1532]]:

	1532. MON("frost giant", S_GIANT,		1532. MON("frost giant", S_GIANT,
	1533. LVL(10, 12, 3, 10, -3), (G_NOHELL\|G_GENO\|G_SGROUP\|1),		1533. LVL(10, 12, 3, 10, -3), (G_NOHELL\|G_GENO\|G_SGROUP\|1),
Line 34:		Line 33:
	1535. NO_ATTK, NO_ATTK, NO_ATTK, NO_ATTK, NO_ATTK),		1535. NO_ATTK, NO_ATTK, NO_ATTK, NO_ATTK, NO_ATTK),
	1536. SIZ(2250, 750, 0, MS_BOAST, MZ_HUGE), MR_COLD, MR_COLD,		1536. SIZ(2250, 750, 0, MS_BOAST, MZ_HUGE), MR_COLD, MR_COLD,
	~~1537. M1_HUMANOID\|M1_CARNIVORE,~~
	~~1538. M2_GIANT\|M2_STRONG\|M2_ROCKTHROW\|M2_NASTY\|M2_COLLECT\|M2_JEWELS,~~
	~~1539. M3_INFRAVISIBLE\|M3_INFRAVISION, CLR_WHITE),~~

	So we have a frost giant corpse with mlevel 10.		So we have a frost giant corpse with mlevel 10.
	Line 676 above states that if we		Line 676 above states that if mlevel is less than or equal to rn2(chance) (the default 15 in this case for cold resistance) then we fail to gain the intrinsic which happens later on in eat.c.

			rn2 is stated in the comments as [[rnd.c#22]]:
			22. rn2(x) /* 0 <= rn2(x) < x */

			Which means it produces integers from 0 to x-1 with (in theory) equal probability. In our case it will produce numbers from 0 to chance-1 or 0 to 14 with equal probability. Frost giant's mlevel is 10 so that statement will be false for numbers 0-9 and true for 10-14. When the statement is true we see that you DON'T gain the intrinsic and when it is false you DO gain the intrinsic. This means that you will gain the intrinsic two thirds of the time (on rolls 0-9). A little test I conducted in Wizard mode by deleting the save file after every game:

			Eating a frost giant corpse 17 times, I gained the intrinsic 11 times
			Eating a tin of frost giant 27 times, I gained the intrinsic 20 times
			(11+20)/(17+27) = 0.73 which is closer to 67% than 33%.

Addps4cat: saving

2007-09-05T16:04:54Z

saving

← Older revision		Revision as of 16:04, 5 September 2007
Line 37:		Line 37:
	1538. M2_GIANT\|M2_STRONG\|M2_ROCKTHROW\|M2_NASTY\|M2_COLLECT\|M2_JEWELS,		1538. M2_GIANT\|M2_STRONG\|M2_ROCKTHROW\|M2_NASTY\|M2_COLLECT\|M2_JEWELS,
	1539. M3_INFRAVISIBLE\|M3_INFRAVISION, CLR_WHITE),		1539. M3_INFRAVISIBLE\|M3_INFRAVISION, CLR_WHITE),

			So we have a frost giant corpse with mlevel 10.
			Line 676 above states that if we

Addps4cat: Mistakes in cold resist calc. saving

2007-09-05T15:52:26Z

Mistakes in cold resist calc. saving

New page

I just dove through the source code for two hours and conducted a small trial and I think this [http://www.geocities.com/dcorbett42/nethack/corpse.htm] is wrong. Here is the basis for my argument:

The relevant portion of [[eat.c#640]]
654. switch (type) {
655. case POISON_RES:
656. if ((ptr == &mons[PM_KILLER_BEE] ||
657. ptr == &mons[PM_SCORPION]) && !rn2(4))
658. chance = 1;
659. else
660. chance = 15;
661. break;
662. case TELEPORT:
663. chance = 10;
664. break;
665. case TELEPORT_CONTROL:
666. chance = 12;
667. break;
668. case TELEPAT:
669. chance = 1;
670. break;
671. default:
672. chance = 15;
673. break;
674. }
675.
676. if (ptr->mlevel <= rn2(chance))
677. return; /* failed die roll */

And an example from [[Monst.c#1532]]

1532. MON("frost giant", S_GIANT,
1533. LVL(10, 12, 3, 10, -3), (G_NOHELL|G_GENO|G_SGROUP|1),
1534. A(ATTK(AT_WEAP, AD_PHYS, 2,12),
1535. NO_ATTK, NO_ATTK, NO_ATTK, NO_ATTK, NO_ATTK),
1536. SIZ(2250, 750, 0, MS_BOAST, MZ_HUGE), MR_COLD, MR_COLD,
1537. M1_HUMANOID|M1_CARNIVORE,
1538. M2_GIANT|M2_STRONG|M2_ROCKTHROW|M2_NASTY|M2_COLLECT|M2_JEWELS,
1539. M3_INFRAVISIBLE|M3_INFRAVISION, CLR_WHITE),