11-19-2006, 05:16 PM | #1 |
Join Date: Nov 2004
Location: Flushing, Michigan
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Rounding questions...official ruling?
Okay, I apologize if these are stupid questions, or if I'm just missing the passage that clarifies things, but the rules are not entirely clear on this point...
1) In the Basic Set, it says one should round fractional point costs up on advantages. That certainly makes sense if you're rounding 3.75 points to 4 or 17.5 points to 18, but what about something like 40.2 points? Should that be rounded up to 41 points or, because it is below the .5 mark, down to 40 points? 2) In GURPS Traveller: Interstellar Wars, the formula for calculating the number of turrets one can have on a ship of a certain size directs one to "round down to the nearest integer." Obviously, if the number one has to round is 1.5, it makes sense that one should round down to 1, but what about 1.98? Should it be rounded down to 1 or to the nearest integer...2? (The example in the book does the latter, which I think makes more sense, but the rule itself as written is not entirely clear.) Thanks. Mark |
11-19-2006, 05:33 PM | #2 | ||
Join Date: Sep 2004
Location: Canada
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Re: Rounding questions...official ruling?
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11-19-2006, 07:12 PM | #3 |
Icelandic - Approach With Caution
Join Date: Jan 2005
Location: Reykjavķk, Iceland
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Re: Rounding questions...official ruling?
I realize this doesn't help with planets and such, but ISTR it's always to the disadvantage of the PC.
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11-20-2006, 01:35 AM | #4 |
Join Date: Aug 2004
Location: Dobbstown Sane Asylum
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Re: Rounding questions...official ruling?
I don't see how either of these rules are at all unclear. "Round down to the nearest integer" is completely unambiguous
4.5 becomes 4. 125.8 becomes 125. 8.999456 becomes 8. If the rules wanted there to be an exception, they'd state it. So yes, if your character buys a modified advantage which ends up costing 70.05 character points, you round up to 71.
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11-20-2006, 05:53 AM | #5 |
Join Date: Nov 2004
Location: Flushing, Michigan
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Re: Rounding questions...official ruling?
I agree, and I have no trouble with the character point question; for that one, I just wanted to be sure I was getting it right.
The ship design question is a little harder--the rule, as written, makes sense, but the example in the book (a 100-dton needle patrol craft) SHOULD have 1 turret (1.98, rounded down to 1) but it is listed as having 2. That's why I'm asking...did they mean "round to the nearest integer, rounding down if the decimal is .5" or was it just a mistake? Mark |
11-20-2006, 10:05 AM | #6 |
GURPS Line Editor
Join Date: Jul 2004
Location: Montréal, Québec
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Re: Rounding questions...official ruling?
* Fractional character points always round up; 20.99, 20.9, 20.5, 20.1, 20.01, 20.001 . . . all become 21.
* Everything else is meant to be taken literally, regardless of whether the author forgot his own rounding conventions and/or an editor helpfully (but wrongly) rounded in another, more traditional way. As an editor, I personally change all rules phrased like "round down to the next-lowest whole number" to "drop all fractions," because most people find it more intuitive to use.
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Sean "Dr. Kromm" Punch <kromm@sjgames.com> GURPS Line Editor, Steve Jackson Games My DreamWidth [Just GURPS News] |
11-22-2006, 12:20 PM | #7 |
Join Date: Apr 2006
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Re: Rounding questions...official ruling?
What about multiple possible roundings? Are there any offical rulings for them?
Do 4 levels of an advantage costing 5.2 points each level cost 21 (5.2*4 then round up) or (5.2 rounded up to 6 times 4 is 24)? Does someone with a base speed 6.75, no modifiers for Move, in Medium Encumberance move at 4 (6.75*.6 = 4.05 then round down) or 3 (6*.6 = 3.6 then round down)? Does 4 levels of Reduced Time on Shapeshifting let you change in 1 second (10, 5, 3, 2, 1) or as a free action (10, 5, 2.5, 1.25, .625)? Or another way to put it, would a power with a base time of 1 minute need 8 levels of Recuced Time for a free action (60, 30, 15, 8, 4, 2, 1, 0), 7 (60, 30, 7.5, 3.75, 1.875, .9375 so 1, then 1 more to make it free), or 6 (60, 30, 7.5, 3.75, 1.875, .9375)?
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11-22-2006, 03:07 PM | #8 | |||
GURPS Line Editor
Join Date: Jul 2004
Location: Montréal, Québec
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Re: Rounding questions...official ruling?
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Sean "Dr. Kromm" Punch <kromm@sjgames.com> GURPS Line Editor, Steve Jackson Games My DreamWidth [Just GURPS News] |
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11-22-2006, 03:19 PM | #9 | ||||
Join Date: Dec 2004
Location: Concord, NC
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Re: Rounding questions...official ruling?
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