04-20-2021, 11:10 AM | #11 |
Join Date: Mar 2016
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Re: speed range table equation
The rule is more like "except for very large differences, a creature's SM is based on the size of the race, not the individual."
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04-20-2021, 11:30 AM | #12 |
Join Date: Jul 2008
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Re: speed range table equation
I don't think I'd call 7 feet and a quarter inch (fits Basic Set spec for Gigantism) a very large difference from 6'11" (fits Basic Set spec for non-Gigantism human). I wouldn't even call it a very large difference from the six-foot 'actually SM 0' human.
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04-20-2021, 11:34 AM | #13 |
Join Date: May 2007
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Re: speed range table equation
Where an arbitrary cutoff exists, the smallest person above it is always going to be only a tiny bit bigger than the biggest person below it, but 7 feet is certainly very tall for a human (a quick internet search suggests the average American man is about 5 feet 9 inches, so that's well over a foot of excess- quite enough to count as extraordinary in my book).
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04-20-2021, 11:57 AM | #14 | |
Join Date: Jun 2013
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Re: speed range table equation
Quote:
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04-20-2021, 12:19 PM | #15 | |
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Join Date: Sep 2004
Location: Southeast NC
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Re: speed range table equation
Quote:
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04-20-2021, 08:23 PM | #16 |
Join Date: May 2012
Location: New Hampshire, USA
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Re: speed range table equation
I'm actually not looking for fractional modifiers, and fractional differences of yards are irrelevant for me.
I have a mechanic in my game where there is a ritual that builds a well of power that grows stronger with every month that the ritual is performed. I wanted a progression that could provide meaningful growth within a few in game months of play, but could also handle hundreds of years of a coven working the ritual and passing the well down. I decided to use the controlled exponential curve of the speed-range table for easy reference. Thus read months maintained as yards on the table and the modifier is the max er value for the well. So I actually only need to count the number of yards and get a number back. And unlike with range penalties I'd rather round down then up: i.e. 6 months would be 2 max er, instead of 3 max er. But it sounds like this is going to be a lot more difficult than I thought. =p |
04-21-2021, 09:19 AM | #17 | |
Join Date: Sep 2007
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Re: speed range table equation
Quote:
Most of the other comments are about details of the published table in RAW, which is based on that formula, but rounded a bit. You can round whichever way suits you if you're not keen on matching the printed SSRT exactly. If your doctor has advised you to cut down on your math intake, then just remember that adding six steps means multiplying by 10. You can change the "six" to anything you like as well. Or the "10", for that matter, to make the multiple of time needed for a certain size increase suit your vision. |
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04-21-2021, 10:56 AM | #18 | |
Join Date: May 2012
Location: New Hampshire, USA
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Re: speed range table equation
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04-21-2021, 11:09 AM | #19 | |
Join Date: Jun 2013
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Re: speed range table equation
Quote:
=ROUNDDOWN(6*LOG(B1/2),0) to get your output, with B1 being the field where you type in the number of months (or have it calculated, say for number of years). The deviation points (rounding to the nearest tenth, and only looking at the first part of the sequence) are that +2 starts at 4.4 months (rather than 5), +3 starts at 6.4 months (rather than 7), +4 starts at 9.3 months (rather than 10), and +5 starts at 13.7 months (rather than 15). +0 is still at 2 months, and +1 is still at 3 months; every +6 repeats the above, multiplied by 10 (so +4 starts at 93 months). I believe the above equation will work for Google Sheets; if not, just find out what their equivalent to the ROUNDDOWN function is and use that instead. (EDIT: Annnnd I just noticed you already had this solution. Oops.)
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04-21-2021, 11:37 AM | #20 | |
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Join Date: Aug 2004
Location: Sumter, SC
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Re: speed range table equation
Quote:
Speed/Range formula: 2 - 6*log(Distance in Yards) Size formula: 6*log(length in yards) - 2 The GURPS wiki's Size and Speed/Range Table takes the equation to +31 and then gives even larger numbers. Because it is a log it is easy to extrapolate any value above 15 yd; 10x the value is +6 to the adjustment. So all you really need is 0 through 15 yd and work up from there. 1 yd; -2; +2 1.5 yd; -1; +1 2 yd; 0 3 yd; -1; +1 5 yd; -2; +2 7 yd; -3; +3 10 yd; -4; +4 15 yd; -5; +5 10x; (-6); (+6) Say you have something 1 mile away. That is 1700 yds or 1.7 x 10^3 1.7 goes up to 2 which is 0 and you -18 (3x6) The modifier is -18 for speed or distance For 12 miles away 12 miles is 20,400 yds or 2.04 x 10^4 2.04 is -1 and you -24 (4x6) The modifier is -25
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