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A math question. [message #255878]

Thu, 26 April 2007 07:43

jnz
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Registered: July 2006
Location: 30th century

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General (3 Stars)

This, imo is pretty tricky. It needs to be done, though, I'm hoping a lot of the people on these forums are as smart as they say they are. No, this is not homework or something just to test everyone. It is for a program i am making.

L = (X+S/2)*W/S)-((O*W)/100)

I need to find X when i know L. If someone could do this i would be very grateful.

[Updated on: Thu, 26 April 2007 07:43]

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Re: A math question. [message #255879 is a reply to message #255878]

Thu, 26 April 2007 07:46

Genesis2001
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Registered: August 2006

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So....You just need to solve for "X"?

-MathK1LL

EDIT: Got it!

X = 2((S/W)*((O*W/100) + L)) - 2

[Updated on: Thu, 26 April 2007 07:51]

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Re: A math question. [message #255881 is a reply to message #255878]

Thu, 26 April 2007 07:47

jnz
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I need to change the formulae to get X when i know L.

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Re: A math question. [message #255883 is a reply to message #255879]

Thu, 26 April 2007 07:49

Genesis2001
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MathK1LL wrote on Thu, 26 April 2007 08:46

EDIT: Got it!

X = 2((S/W)*((O*W/100) + L)) - 2

[Updated on: Thu, 26 April 2007 07:51]

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Re: A math question. [message #255885 is a reply to message #255878]

Thu, 26 April 2007 07:51

mrpirate
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Registered: March 2003
Location: Ontario

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X = (S * (L + (O*W)/100))/W + S/2

I think

[Updated on: Thu, 26 April 2007 07:52]

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Re: A math question. [message #255887 is a reply to message #255878]

Thu, 26 April 2007 07:57

jnz
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Location: 30th century

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General (3 Stars)

I tried MathK1ll's and it didn't work. Just trying mrpirate's.

EDIT: mrpirate's didn't work. It looks like it needs half of the total value taken away. but thats just a guess.

[Updated on: Thu, 26 April 2007 08:02]

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Re: A math question. [message #255890 is a reply to message #255878]

Thu, 26 April 2007 08:24

Try_lee
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Registered: February 2003
Location: Reading, England

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Colonel

Mr. Pirate was almost right. He should have had -s/2 instead of +s/2.

YARR! The pirate life is for me!

http://www.n00bstories.com/image.fetch.php?id=1202408761

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Re: A math question. [message #255892 is a reply to message #255878]

Thu, 26 April 2007 08:38

jnz
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Almost there. the values still need to be a little higher. thanks though Smile

Smile

[Updated on: Thu, 26 April 2007 08:40]

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Re: A math question. [message #255896 is a reply to message #255878]

Thu, 26 April 2007 08:48

mrpirate
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oops

kinda pathetic considering I just wrote a math exam

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Re: A math question. [message #255906 is a reply to message #255878]

Thu, 26 April 2007 09:32

Tunaman
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Registered: January 2005

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General (1 Star)

(S((O - 50)*W + 100L))/100W

http://img694.imageshack.us/img694/9055/tunamanlmao.png

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Re: A math question. [message #255910 is a reply to message #255906]

Thu, 26 April 2007 09:43

jnz
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General (3 Stars)

Ralphzehunter wrote on Thu, 26 April 2007 17:32

(S((O - 50)*W + 100L))/100W

Thanks you soo much In Love

In Love

In Love

In Love

. I have been breaking my head over this question for days.

And thank you to everyone else that at least tried.

Just in case everyone was wondering, it is for the SEye. The original formula converts the map coord to the picture coord. this does it the other way round.

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Re: A math question. [message #255911 is a reply to message #255878]

Thu, 26 April 2007 09:43

Tunaman
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Registered: January 2005

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No problem. Rocked Over

Rocked Over

http://img694.imageshack.us/img694/9055/tunamanlmao.png

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Re: A math question. [message #255945 is a reply to message #255878]

Thu, 26 April 2007 12:12

Genesis2001
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Registered: August 2006

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:/

My brain was "math-ed"-out today and this past week.... bleh.

-MathK1LL

P.S.

I'm going to retry the problem again and see though... Smile

Smile

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Re: A math question. [message #255946 is a reply to message #255878]

Thu, 26 April 2007 12:14

Viking
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Registered: July 2005
Location: Earth

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General (1 Star)

AHHH! Math my brain hurts... Crazy

Crazy

QUOTES
"The Renegade community revolves around having something awesome, and not sharing it so you can be on top of the mountain." -Canadacdn

Crimson wrote on Thu, 17 May 2007 05:22

Memphis wrote on Tue, 15 May 2007 03:54

...fatally die to death...

I don't know if you meant to do that, but triple redundancy for teh win. I LOL'ed.

Awesome l337 people= Icedog90, Blazea58, Canadacdn, Crimson, jonwil

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Re: A math question. [message #255966 is a reply to message #255878]

Thu, 26 April 2007 13:31

mrpirate
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Location: Ontario

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it's just algebra...

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Re: A math question. [message #256631 is a reply to message #255966]

Tue, 01 May 2007 10:15

Jerad2142
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Registered: July 2006
Location: USA

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General (3 Stars)

Can anyone give me a formula for how I would calculate what angle an artillery would have to aim at if I knew: gravity, speed of the projectile, distance away the object is from the artillery, height of the object compared to the artillery, and 0 air resistance. This is also for a program, or game more likely *cough*new AI for Renhalo*cough*.

Visit Jerad's deer sweat shop

[Updated on: Tue, 01 May 2007 10:15]

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Re: A math question. [message #256684 is a reply to message #255878]

Tue, 01 May 2007 15:42

Zion
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Registered: April 2006

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General (2 Stars)

Not completely sure but the logistic side of this may help you.

Automatic Ballistic Artillery Cannon using The Wire Addon for GMod10

Maybe the large diagram further down with math operations and constants can help you with the logic of programming this. Be warned though, most of the 'gates' and 'arithmatic chips' are programmed into channels of inputs and outputs, but they should be labeled on the diagram anyway.

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Re: A math question. [message #256785 is a reply to message #255878]

Wed, 02 May 2007 09:10

StealthEye
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Registered: May 2006
Location: The Netherlands

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General (2 Stars)

mathomatic ftw!
http://mathomatic.orgserve.de/math/

1-> L = (X+S/2)*W/S-((O*W)/100)

             S
        (X + -)*W
             2      O*W
#1: L = --------- - ---
            S       100

1-> simp

           1    O    X
#1: L = W*(- - --- + -)
           2   100   S

1-> X

         L   1    O
#1: X = (- - - + ---)*S
         W   2   100

Even without it is wasn't too hard though. Razz

Razz

BlackIntel admin/founder/coder
Please visit http://www.blackintel.org/

[Updated on: Wed, 02 May 2007 09:12]

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Re: A math question. [message #256791 is a reply to message #256785]

Wed, 02 May 2007 10:42

Jerad2142
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Registered: July 2006
Location: USA

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General (3 Stars)

I am more or less just looking for a flat out formula to do this (yes I know it is going to be multiple formula's combined). I have searched the Internet before, but no luck, I just think it would be awesome for Renegade to have a good arching projectile AI.

Visit Jerad's deer sweat shop

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Re: A math question. [message #256792 is a reply to message #256791]

Wed, 02 May 2007 10:46

Crusader
Messages: 319
Registered: February 2007

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Recruit

Kinda like the Grenadier? An AI Grenadier who never misses would be nice!

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Re: A math question. [message #256821 is a reply to message #255878]

Wed, 02 May 2007 13:32

jnz
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Location: 30th century

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General (3 Stars)

Mabe a homing missile that is shot straight up into the air?

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Re: A math question. [message #256827 is a reply to message #256631]

Wed, 02 May 2007 14:04

Doitle
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Registered: February 2003
Location: Chicago, IL

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General (1 Star)
Moderator/Captain

Jerad Gray wrote on Tue, 01 May 2007 12:15

Can anyone give me a formula for how I would calculate what angle an artillery would have to aim at if I knew: gravity, speed of the projectile, distance away the object is from the artillery, height of the object compared to the artillery, and 0 air resistance. This is also for a program, or game more likely *cough*new AI for Renhalo*cough*.

Here you go.

R = d + v*cos(theta)*(v*sin(theta)+SqRt(v^2*.5*(1-cos(2theta))-(2*A*(0-h)))/A)

I'm pretty sure that's the Master Projectile Equation I derived back in Highscool. I still had the prgoram I made for the TI that ran the equation. Basically here's the breakdown. V = your muzzle velocity. Theta is the angle off the horizontal. A is your accelleration constant (e.g. g=9.81m/s^2) H is your initial height. D is your initial X displacement. (How far back from the edge of the cliff you are.

Hope that helps. If you can't make sense of it I'll go put it into math type to make it look a bit prettier.

http://www.n00bstories.com/image.fetch.php?id=1285726594

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Re: A math question. [message #256832 is a reply to message #255878]

Wed, 02 May 2007 14:26

BlueThen
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Registered: February 2006

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General (2 Stars)

7?

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Re: A math question. [message #256931 is a reply to message #255878]

Thu, 03 May 2007 03:19

Doitle
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Location: Chicago, IL

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General (1 Star)
Moderator/Captain

index.php?t=getfile&id=3285&private=0

There it is all spiffy. I included an example calculation.

Attachment: projshot.jpg
(Size: 36.32KB, Downloaded 270 times)

http://www.n00bstories.com/image.fetch.php?id=1285726594

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Re: A math question. [message #256963 is a reply to message #255878]

Thu, 03 May 2007 07:37

CarrierII
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Registered: February 2006
Location: England

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General (3 Stars)

From what I remember, an SSE2 equipped CPU will run that calculation better (lots of extra maths instructions in there)

Edit - I can't spell!

Renguard is a wonderful initiative

[Updated on: Thu, 03 May 2007 07:37]

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