Steve Jackson Games - Site Navigation
Home General Info Follow Us Search Illuminator Store Forums What's New Other Games Ogre GURPS Munchkin Our Games: Home

Go Back   Steve Jackson Games Forums > Roleplaying > GURPS

Reply
 
Thread Tools Display Modes
Old 02-25-2008, 03:54 PM   #1
mook
 
mook's Avatar
 
Join Date: Aug 2004
Location: Los Angeles
Default Quick Question on 'Less Than 1/3 HP'

Yep, time for another question! This one should be pretty quick though.

If you are at "less than 1/3 HP", your Move and Dodge are halved. Assuming a character with HP 10, would that be:

A) 1/3 of 10 = 3.3, rounded down to 3 - "less than 3" is 2, so Move and Dodge are halved at HP 2

B) 1/3 of 10 = 3.3 - "less than 3.3" is 3, so Move and Dodge are halved at HP 3

I'm reasonably sure it's A, but just wanted to check before moving forward.

Thanks!
__________________
How to Be a GURPS GM, author
Game Geekery, Blog (GURPS combat examples, fillable PDF sheets, rules summaries, campaigns and one-shots, intro for beginners)
Discord, unofficial hangout and real-time chat
mook is offline   Reply With Quote
Old 02-25-2008, 04:09 PM   #2
vicky_molokh
GURPS FAQ Keeper
 
vicky_molokh's Avatar
 
Join Date: Mar 2006
Location: Kyv, Ukraine
Default Re: Quick Question on 'Less Than 1/3 HP'

Quote:
Originally Posted by mook
Yep, time for another question! This one should be pretty quick though.

If you are at "less than 1/3 HP", your Move and Dodge are halved. Assuming a character with HP 10, would that be:

A) 1/3 of 10 = 3.3, rounded down to 3 - "less than 3" is 2, so Move and Dodge are halved at HP 2

B) 1/3 of 10 = 3.3 - "less than 3.3" is 3, so Move and Dodge are halved at HP 3

I'm reasonably sure it's A, but just wanted to check before moving forward.

Thanks!
I somehow always thought that you only round numbers after performing all the calculations.
__________________
Vicky 'Molokh', GURPS FAQ and uFAQ Keeper
Also, GURPS Discord is a nice place for (faster) Q&A and overall GURPS dicussion.
vicky_molokh is offline   Reply With Quote
Old 02-25-2008, 04:16 PM   #3
transmetahuman
 
Join Date: Oct 2004
Location: Madison, WI, USA
Default Re: Quick Question on 'Less Than 1/3 HP'

It's B. Less than 3 1/3 is 3... that's pretty standard in the examples of several different kinds of fractional cutoffs in 4e.
transmetahuman is offline   Reply With Quote
Old 02-25-2008, 05:00 PM   #4
AstralRunner
 
Join Date: Apr 2006
Default Re: Quick Question on 'Less Than 1/3 HP'

Rounding is not even needed in this case; the answer is 3.

But, the question remains if a better example is used. Suppose the character has 12 HP, which makes 1/3 HP an integer, 4. The answer is still 3, since it is the largest possible HP value less than 4. If the character advances to 13 HP, then they suffer those effects at 4.

This is one of those cases where the rule is actually "well-defined" in a mathematical sense, but confusion results because people aren't sure if they're allowed to apply regular math to game numbers. Confusion like this is inevitable when a game presumes to redefine how basic operations like rounding work.
AstralRunner is offline   Reply With Quote
Old 02-25-2008, 06:51 PM   #5
mook
 
mook's Avatar
 
Join Date: Aug 2004
Location: Los Angeles
Default Re: Quick Question on 'Less Than 1/3 HP'

The consensus seems to be that no rounding should occur at all, so that would mean that Move and Dodge are halved as follows:

HP 09, when HP = 2
HP 10, when HP = 3
HP 11, when HP = 3
HP 12, when HP = 3
HP 13, when HP = 4
HP 14, when HP = 4
HP 15, when HP = 4
HP 16, when HP = 5
HP 17, when HP = 5
HP 18, when HP = 5

Sound about right? I'll start checking over my examples again. :)
__________________
How to Be a GURPS GM, author
Game Geekery, Blog (GURPS combat examples, fillable PDF sheets, rules summaries, campaigns and one-shots, intro for beginners)
Discord, unofficial hangout and real-time chat
mook is offline   Reply With Quote
Old 02-25-2008, 06:59 PM   #6
TJA
 
Join Date: Oct 2004
Default Re: Quick Question on 'Less Than 1/3 HP'

Quote:
Originally Posted by transmetahuman
It's B. Less than 3 1/3 is 3... that's pretty standard in the examples of several different kinds of fractional cutoffs in 4e.
Do you have an concrete example with book and pagenumber?

I also always assumed 2!

It is quite clear, that 14/2 = 7 and that "above HP/2" is 8 in that case.
So, "below HP/2" will be 6

For 13/2 = 6.5, i always assumed 5 for "below HP/2" and 7 for "above HP/2"

And now think about how clear some rules in GURPS are written - not clear enough, it seems.
__________________
4E books: Basic, Powers, Fantasy, Magic, Thaumatology, High Tech, Ultra-Tech, Martial Art, Supers, Space (SC only), Spaceships plus GCA and 66 of 3E books
PDF: 4E as above plus Bio-Tech, DF and more
TJA is offline   Reply With Quote
Old 02-25-2008, 07:15 PM   #7
TJA
 
Join Date: Oct 2004
Default Re: Quick Question on 'Less Than 1/3 HP'

Found something:Characters 4E, page 9

"Round down for character feats and combat results. [...] or to calculate injury or other combat results, round all fractions down.
For instance, for an attack that inflicts 3 points of injury with a 50% damage bonus, round down from 4.5 to 4 points."

For me, that sounds like "10/3" = 3.333 = 3
And less then 3 is 2 - as long as you have 3 HP left, you will move normally!
__________________
4E books: Basic, Powers, Fantasy, Magic, Thaumatology, High Tech, Ultra-Tech, Martial Art, Supers, Space (SC only), Spaceships plus GCA and 66 of 3E books
PDF: 4E as above plus Bio-Tech, DF and more
TJA is offline   Reply With Quote
Old 02-25-2008, 09:04 PM   #8
Rupert
 
Rupert's Avatar
 
Join Date: Aug 2004
Location: Wellington, NZ
Default Re: Quick Question on 'Less Than 1/3 HP'

Quote:
Originally Posted by TJA
"Round down for character feats and combat results. [...] or to calculate injury or other combat results, round all fractions down.
For instance, for an attack that inflicts 3 points of injury with a 50% damage bonus, round down from 4.5 to 4 points."

For me, that sounds like "10/3" = 3.333 = 3
And less then 3 is 2 - as long as you have 3 HP left, you will move normally!
However, B419 clearly states that in this case you round up. The examples on B421 shows it's the same for 'crippling' thresholds.
__________________
Rupert Boleyn

"A pessimist is an optimist with a sense of history."
Rupert is offline   Reply With Quote
Old 02-25-2008, 09:32 PM   #9
Phoenix_Dragon
 
Phoenix_Dragon's Avatar
 
Join Date: Apr 2005
Default Re: Quick Question on 'Less Than 1/3 HP'

Quote:
Originally Posted by TJA
Found something:Characters 4E, page 9

"Round down for character feats and combat results. [...] or to calculate injury or other combat results, round all fractions down.
For instance, for an attack that inflicts 3 points of injury with a 50% damage bonus, round down from 4.5 to 4 points."

For me, that sounds like "10/3" = 3.333 = 3
And less then 3 is 2 - as long as you have 3 HP left, you will move normally!
GURPS always seems to assume basic math, which is pretty clear on how 3 is less than 10/3...
Phoenix_Dragon is online now   Reply With Quote
Old 02-25-2008, 09:47 PM   #10
mook
 
mook's Avatar
 
Join Date: Aug 2004
Location: Los Angeles
Default Re: Quick Question on 'Less Than 1/3 HP'

Quote:
Originally Posted by Rupert
However, B419 clearly states that in this case you round up. The examples on B421 shows it's the same for 'crippling' thresholds.
On B419, are you referring to where it says "Halve your Move and Dodge (round up)"? I'm assuming that's referring to the halving of the Move and Dodge, not the "less than 1/3 HP".

B421 I only see one example, but it doesn't have any rounding at all, it uses the example of HP 10, half of which is 5, so more than HP/2 is 6 (no fractions, all whole numbers).

Not saying the conclusion is wrong, those pages just don't seem to prove the point(s).
__________________
How to Be a GURPS GM, author
Game Geekery, Blog (GURPS combat examples, fillable PDF sheets, rules summaries, campaigns and one-shots, intro for beginners)
Discord, unofficial hangout and real-time chat
mook is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Fnords are Off
[IMG] code is Off
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 08:35 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2017, vBulletin Solutions, Inc.