I hate trig

Zaei · Nov 2nd, 2001, 06:52 AM

SImple, enough. If you have, say, 4 nodes, the first is at 45, the second at 90+45, the third at 180+45, and the fourth at 360-45. Now, to find the coordinates, simple multiply each angle by (pi / 180) to convert to radians, and use this formula:

Code:

p.x = center.x + radius * cos(radianMeasure)
p.y = center .y + radius * sin(radianMeasure)

Where radianMeasure is the degree angle converted to radians, p and center are POINTAPI, radius is, of course, the distance from the center to each node.

I chose to start at 45, because you will then get a nice looking X shape. You should start the count at (angleBetween / 2).

Z.

**plenderj** · Nov 2nd, 2001, 06:57 AM

Hmmm well the user can do any from 1 up to n hosts. So I would have to start a spoke somewhere, and then each additional spoke is (360 / hosts) degrees away...

uhn I really hate trig stuff. I much prefer proper coding

Zaei · Nov 2nd, 2001, 07:32 AM

That's what I am saying. Start the first host at (360 / hosts) / 2, and increase that count by (360 / hosts) each time.

Z.

**plenderj** · Nov 2nd, 2001, 07:35 AM

You wanna code it for me ?
I'll swap for the tracert+ping code

**Arbiter** · Nov 2nd, 2001, 08:16 AM

Honestly, even the simplest of things elude you!

What he said was:

LengthOfSpoke = (((pi * 42)/6) * AvgNoOfBowelMvmntsThisWeek) + _

centerpoint + ((100/maxping)*pingsize) *cos( ((360/maxnodes)*currentnode)*(pi / 180 ))

Easy innit!

**Sastraxi** · Nov 2nd, 2001, 08:36 AM

For ease-of-use, use a different coordinate system that has your computer's centre at 0,0. Then for each computer use X = Cos((ComputerNumber / Computers) * 360 * (Pi / 180)) * (length you want it to be away from), and set Y with the Sin() function in the same way.

**plenderj** · Nov 2nd, 2001, 09:05 AM

People, im looking for code, not comments

**Arbiter** · Nov 2nd, 2001, 09:16 AM

nodex = centerpoint + ((100/maxping)*pingsize) *cos( ((360/maxnodes)*currentnode)*(pi / 180 ))

nodey = centerpoint + ((100/maxping)*pingsize) *sin( ((360/maxnodes)*currentnode)*(pi / 180 ))

there's some rough maths for you you moaning git!

Don't know if it works - I've just come back from the pub and maths isn't my strong point anyway. If it's useless and wrong then it's useless and wrong. I don't care....

**plenderj** · Nov 2nd, 2001, 09:19 AM

Check your email. Don't toy with me right now

Anyway. I just need some code to copy and paste. I'm in no mood to rub brain cells together. I'm in more of a mood to wet them with a bit of bulmers...

**Arbiter** · Nov 2nd, 2001, 09:26 AM

Not got an eMail yet matey, servers are running slow. Thought you hadn't bothered replying

The best I can offer is that you put your wotsit on a server somewhere and I'll download it and have a look. I can't post code based on what you've put here...

**plenderj** · Nov 2nd, 2001, 09:32 AM

www.coolground.com/plenderj/4.zip

it does a tracert to 4 addresses at the moment.
user will be able to tracert to 1 or n hosts.
records all the info.
have to display.
oasidj2sfkop3
p
asjfoi!

**Arbiter** · Nov 2nd, 2001, 09:45 AM

Got your mail and replied now. I'm look at the project as well.

What happened at the bottom of you post? Bang you head against the keyboard?

**plenderj** · Nov 2nd, 2001, 09:48 AM

bout of rage.
got some groove armada (at the river) on at the minute, so its all good.

**Arbiter** · Nov 2nd, 2001, 09:57 AM

Ok, I've looked at that project and it seems to get in an infinite loop. The sHostIP never changes and as it's being compared at one point to get out of the loop - it never makes it.

Is this just me being thick?

**plenderj** · Nov 2nd, 2001, 11:03 AM

Its you being thick.
tracert works ; trust me. its complicated.
just do the trig

**Arbiter** · Nov 2nd, 2001, 11:06 AM

I'm struggling with it because I can't test it because it doesn't work.

I'll try it at home where I can look at it without being hidden behind all the complicated network ****e and I can get some ping values back.

Speak to you in an hour or so.

**kedaman** · Nov 2nd, 2001, 04:49 PM

Holy crap jamie, you don't know euler transformation?

**Jotaf98** · Nov 2nd, 2001, 06:04 PM

D*MN!!! It ate my post! I spent the last half an hour writing it

Ok so I'm gonna post here just the code. And this one I'm sure it works

VB Code:

Angle = (Pi * 2 * Host) / NumHosts
HostX = CircleX + Cos(Angle) * CircleRadius
HostY = CircleY + Sin(Angle) * CircleRadius

Let's see... Pi is obviously 3.1415926..., Host is the number of the host you're drawing, NumHosts is the number of hosts, CircleX/Y is the center of the "circle of hosts", and CircleRadius is the radius of that circle.

Hope that helps!

**plenderj** · Nov 4th, 2001, 06:20 AM

This is kinda what im after.
Each circle on the way is each router on the route ...

**kedaman** · Nov 4th, 2001, 06:53 AM

you can define a complex offset unit to traverse the rotation
Cu=1*e^j2pi/n
and for each singly likned node shown in your figure, increment by Cu*Cn
Cn=u*ping*e^j0
These are polar representation of complex values, the transformation to cartesian is:
r*e^(j*theta)=cos(theta)+jsin(theta)

**plenderj** · Nov 4th, 2001, 06:58 AM

Christ almighty. All I want is a .frm given to me that'll do the job

**kedaman** · Nov 4th, 2001, 07:01 AM

jamie, you should learn this immediately, it'll be good for you

Does the routes split up?

**Jotaf98** · Nov 4th, 2001, 11:52 AM

Sorry but I don't know much about routes and all

Do these things branch out into others, like a tree?

**Arbiter** · Nov 5th, 2001, 02:28 AM

Jamie,

I fail to see what's wrong with the calculations that Jotaf and I posted. They're both pretty similar (mine's not been tested though) but in Jotaf's I guess you'd replace "radius" with the server ping.

PS - I completely fail to see what Kedaman's on about at all. No change there then.

I think I need to buy some more IQ.

**plenderj** · Nov 5th, 2001, 03:15 AM

Ked; No the routes dont split. Just a straight line out at an angle with the nodes along the route along that line.

Rest; I dont wanna do no work. I'm anti-trig. I need a .frm

**kedaman** · Nov 5th, 2001, 04:17 AM

If you use complex values you avoid trigs at almost all costs, eulers formula is unavoidable though, but without it you are no programmer.
Jamie, you learn Trigs at 7'th year or something in basic school here, how come you've avoided them so far? No, you won't survive without them further on.

PS - I completely fail to see what Kedaman's on about at all. No change there then.

Complex values have two faces, they are both polar and cartesian, which makes them an excellent tool

You can though use trigonometry all the time for some transformation, but complex values enhance your generic thinking and makes it easier for you, when you have to do a long series you might win both runtime performance and developement time.

**plenderj** · Nov 5th, 2001, 04:33 AM

I studied complex numbers and polar co-ordinates and all that about 3 years ago. Since then the only time I needed trig was for Craft and I finished the trig part of that ages ago

**Arbiter** · Nov 5th, 2001, 06:37 AM

Sent you an frm with some **** in.

Can't test it 'cos your shoddy code doesn't work properly. It may end up drawing the images completely off the screen - you'll have to step through in a debug to see what it does.

It never gets to that point on mine, it just goes into an endless loop. Don't complain if it doesn't work, because coding trig blind is insane and is guaranteed not to work first time.

**plenderj** · Nov 5th, 2001, 06:41 AM

Well the tracert works for me

Anyway yeah its drawing stuff all in the centre...

**plenderj** · Nov 5th, 2001, 06:44 AM

Hmm the code kinda works. It does draw stuff (we're drawing otherNode.hdc btw). Anyway, it only draws the destination node, not the nodes inbetween...

**Arbiter** · Nov 5th, 2001, 06:53 AM

Are you pinging all the servers inbetween?

If so, and you're storing the ping values in an array then you can easily get it to draw the ones inbetween.

That just loops through the troute wotsit array. If there are other gubbins then just add them in.

I'll take another look and see if I missed anything. It's rather hard, not being able to see what I'm doing and all...

**Arbiter** · Nov 5th, 2001, 06:54 AM

What's dis hoptime thing for?

**plenderj** · Nov 5th, 2001, 06:59 AM

The hoptime is the time to that node. Thats also gonna be the distance between nodes

**Arbiter** · Nov 5th, 2001, 07:04 AM

right, gissa mo and I'll send you something else

**Arbiter** · Nov 5th, 2001, 07:16 AM

Sent you some porn in your eMail.

**plenderj** · Nov 5th, 2001, 09:00 AM

u didnt send me natin but text

**Arbiter** · Nov 5th, 2001, 10:00 AM

I sent you an frm

**plenderj** · Nov 5th, 2001, 10:02 AM

i only got the first one from you.

... keep talking, im nearly at 4096

**Arbiter** · Nov 5th, 2001, 10:09 AM

Idiot boy!

I sent you another .frm with different code.

**plenderj** · Nov 5th, 2001, 10:28 AM

never got it

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