Quick calculation question. - Guild Wars Forums

ajc2123 · Jun 25, 2009, 03:29 PM // 15:29

I've always wondered this...When GW does calculations for things like seconds/health/damage/energy, does it round? Like say a spell is reduced from 15 recharge to 11.25 from a 25% change, is it exactly 11.25 or does it round?

Same thing with energy, say with moral boosts or something its calculated 22.40 energy, even though you see a whole number, do you have a hidden .40 energy or whatever it rounded from?

tmakinen · Jun 25, 2009, 03:43 PM // 15:43

As a rule of thumb GW rounds floating point numbers down when considering various effects. This may even happen several times during the processing. A well known example is the way condition reducing equipment stacks. Let's say that you are dazed for 3 seconds. If you have a 20% reduced daze duration rune and shield then you will only be dazed for floor(0.8 * floor(0.8 * 3)) = 1 second whereas without rounding you would be dazed for 0.8 * 0.8 * 3 = 1.92 seconds.

ajc2123 · Jun 25, 2009, 03:48 PM // 15:48

Very helpful. Thank you.

Shaydow · Jun 25, 2009, 05:31 PM // 17:31

That was very helpfull, ty. You said various effects? Is it condition reduction, like blind etc? What other cases can this apply to?

TY.

Killed u man · Jun 25, 2009, 06:52 PM // 18:52

Quote:

Originally Posted by Shaydow

That was very helpfull, ty. You said various effects? Is it condition reduction, like blind etc? What other cases can this apply to?

TY.

energy, health, damage, anything you can think off

Shaydow · Jun 25, 2009, 07:47 PM // 19:47

Quote:

Originally Posted by Killed u man

energy, health, damage, anything you can think off

I was under the impression this whole time that almost ALL THINGS where EXACT, and did NOT round down. That's why I'm asking for specifics.Is it just then various spells / skills / etc that round down, or are there variables that can cause a skill to be rounded down rather then exact? This is what I was asking.

TY for your time.

Killamus · Jun 25, 2009, 08:41 PM // 20:41

It actually rounds up for enchantments. I know this, because patient spirit lasts 3 seconds with an enchantment weapon.
1.2*2 = 2.4

Jun 25, 2009, 03:29 PM // 15:29	#1
ajc2123 Desert Nomad Join Date: Jan 2007 Location: North of the wall Profession: Me/	Quick calculation question. I've always wondered this...When GW does calculations for things like seconds/health/damage/energy, does it round? Like say a spell is reduced from 15 recharge to 11.25 from a 25% change, is it exactly 11.25 or does it round? Same thing with energy, say with moral boosts or something its calculated 22.40 energy, even though you see a whole number, do you have a hidden .40 energy or whatever it rounded from?

Jun 25, 2009, 03:43 PM // 15:43	#2
tmakinen Desert Nomad Join Date: Nov 2005 Location: www.mybearfriend.net Guild: Servants of Fortuna [SoF] Profession: E/	As a rule of thumb GW rounds floating point numbers down when considering various effects. This may even happen several times during the processing. A well known example is the way condition reducing equipment stacks. Let's say that you are dazed for 3 seconds. If you have a 20% reduced daze duration rune and shield then you will only be dazed for floor(0.8 * floor(0.8 * 3)) = 1 second whereas without rounding you would be dazed for 0.8 * 0.8 * 3 = 1.92 seconds.

Jun 25, 2009, 03:48 PM // 15:48	#3
ajc2123 Desert Nomad Join Date: Jan 2007 Location: North of the wall Profession: Me/	Very helpful. Thank you.

Jun 25, 2009, 05:31 PM // 17:31	#4
Shaydow Ascalonian Squire Join Date: Jun 2009	That was very helpfull, ty. You said various effects? Is it condition reduction, like blind etc? What other cases can this apply to? TY.

Jun 25, 2009, 08:41 PM // 20:41	#7
Killamus Guest Join Date: Oct 2008	It actually rounds up for enchantments. I know this, because patient spirit lasts 3 seconds with an enchantment weapon. 1.2*2 = 2.4