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11:00 PM
60 minutes on the dot (when I sent that) according to winterbash2015.stackexchange.com
 
(which seems to be 30 seconds ahead of my system clock, but whatever)
/me considers writing a bot to announce milestones automagically
 
Milestones? As in every five minutes tell us that we're five minutes closer?
 
@Doorknob Winter Bash probably would've started by the time you finish... :P
 
@Doorknob wat am I looking at
 
11:01 PM
What is post-autumn bash?
 
@CᴏɴᴏʀO'Bʀɪᴇɴ winterbash countdown
 
*stick people
 
@El'endiaStarman Challenge accepted :P
 
I still don't know what Winterbash is. I asked, and all I got was "HATS!" :P
12
 
11:03 PM
HATS!!!
 
ಠ_ಠ
 
ಠಠ_ಠ_ಠಠ
 
@AlexA. I've done something similar, except with red pepper and I was singing Star Wars.
I love these.
Halp.
 
Gah. So creepy.
 
I'm sinking into an abyss of "wat".
 
11:06 PM
ahem Don't you have an essay you should be writing?
 
^
 
@BrainSteel All shall be clear in less than an hour.
 
@FlagAsSpam Yeah, weren't you citing a reddit post?
 
Yeah, uhh, I may've contacted my teacher and he said I was all good.
>.>
 
..."all good" meaning?
 
11:08 PM
Extension because caroling.
 
Is this a journalism course? Surely it can't be history.
 
@BrainSteel Poetry. Specifically the study of the relation of lyricism and musicality.
 
Enter NotDoorknob
 
Hello Scooby @NotDoo.
 
11:10 PM
It's one of the few courses that not only permits, but supports melodic dubstep.
 
/me is a happy panda.
 
@FlagAsSpam ಠ_ಠ
 
@AlexA. Wat?
 
What is melodic dubstep?
 
11:14 PM
Dubstep that is melodic
 
^ That is literally what I typed in.
 
hahaha
 
@AlexA. It's like melodic viking death metal, but melodic dubstep. Hope this clears things up.
 
Basically, it has a structure in which parts of the music may overlap to create a layered effect that sounds pleasing to some ears.
 
@BrainSteel Oh, okay. This makes sense to me now.
 
I'm already nervous. xD I'm a pure electro fan over that of mixed.
 
@AlexA. Exhibit A (youtube)
 
After VTC mentioned "carrotburg" earlier, I've been marathoning some Akimbo. I think it's melodic stepping.
 
@El'endiaStarman Ooh. I do like this, actually.
 
@BrainSteel :D My friend saw them live not too long ago. My favorite album of theirs is definitely With Oden On Our Side.
 
11:16 PM
:D
 
I'm annoyed that she's not actually playing what she's playing in the video, but that's just the violin training kicking in.
 
@AlexA. I have Runes to My Memory from that album, and the full album of Twilight of the Thunder God. Amon Amarth is great.
 
@BrainSteel You don't have the entire album? >:O
 
Amon Amarth is from LotR...I think.
 
The mix is a little treble heavy - I could do with more undertone and more rounded treble.
 
11:18 PM
@AlexA. Unfortunately not.
 
@El'endiaStarman Amon Amarth is from Sweden.
 
But it's pretty good. :D
 
There's definitely Amon-places in LotR.
 
@BrainSteel If there was a way to send files through Stack Exchange I would send you that album.
 
That must be their inspiration.
 
11:18 PM
@El'endiaStarman LotR and metal? Say no more!
 
Filk music is a musical culture, genre, and community tied to science fiction/fantasy fandom and a type of fan labor. The genre has been active since the early 1950s, and played primarily since the mid-1970s. The term (originally a typographical error) predates 1955. == Etymology and definitions == As Interfilk's What it is? page demonstrates, there is no consensus on the definition of filk. Attempts have been made to define filk based on various criteria. === Style and content === Filk has been defined as folk music, usually with a science fiction or fantasy theme, but this definition ...
 
@AlexA. Haha, that would be cool.
 
40 minutes till Winter Bash
 
heyyy the bot worked
 
/me is not sure if that was actually the bot's post
 
11:19 PM
\o/
 
This is what I think of when I think of LotR + metal.
 
@El'endiaStarman I can give you the code if you want. :P
 
Okay fine, you win. :P
 
\o/
Oh wait, you weren't talking to me
 
haha
 
11:20 PM
/o\
 
/oS
slowly unraveling cinnamon roll
 
@AlexA. This is new! Research time!
 
@Doorknob o shit dood the gooey center is teh shet
 
@AlexA. the gooey center is the best part
\o/
 
11:22 PM
Beast port is what mint
 
Anyway, I'm gonna keep the bot running while I study for my history midterm. I'll be back approximately 2 minutes before winterbash starts :P
 
> Beast port: THINK OF THE SERVER KITTIES!
 
@Doorknob Okay, have a good time.
 
@AlexA. ...if you can @Doorknob
 
@AlexA. Good time? Studying history? That's a contradiction
 
11:23 PM
Approximate a good time
 
Divertirse?
 
I worked with a guy who used to work IT at a middle school. He said the majority of his job was picking gum out of USB ports.
 
^ I can confirm this.
There was no IT at my school.
So I was "hired" every once in a while to deal with stuff and things.
just shakes head
 
I remember in 4th grade or so, a couple 5th graders figured out the BIOS password on a classroom computer... :P
Username: master; password: ****** (master).
 
ಠ_ಠ
 
11:26 PM
@El'endiaStarman I remember in Kindergarten figuring out my teacher's password.
Hilarity ensued.
 
bahaha, wow
 
When my girlfriend first moved in with me years ago, she asked what the router password was. I didn't know. Turns out (at the time) it was "password." :|
 
hahahahaha
 
My teacher had no password :P
 
Oh, holy frick, I just found the result of the song that I'm writing the essay on.
^ Lined up for the time, listen to how it drops.
 
11:28 PM
"Drumstep"?
 
Like dubstep, but with a focus on the percussive sounds.
(I don't really like it)
 
30 minutes till Winter Bash
 
Did anybody listen to it? Like, it's not even music, it's just words. o.o
That was emotional.
 
Pop quiz: simplest way to determine if a point is inside a triangle?
Is it fair to say "pop quiz" when I don't know the answer? :P
 
No.
 
11:31 PM
But it's still a quiz given with no warning...
 
@El'endiaStarman Brute force all possible triangles that contain the point and see if any of them are the given triangle
 
Hacking Sonic Battle, a 3d Smash Bros game for the GBA with Sonic Characters
 
@phase Three letters: W. T. F.
 
@phase Tried to see if there was a stereogram in the background. I don't think there's one...
 
I changed something to a bunch of random hex values and out popped the garbage texture for the ground, while the dark blue thing is Amy with a new palette.
 
11:34 PM
o.O
 
That's from a while ago
 
@El'endiaStarman Hey wait, I've done this before.
 
Brute force that shizz nizz until you get all the answers
 
No no, I mean, I've solved this problem before.
 
I just noticed that one of the people who golfs in APL a lot here actually works for Dyalog 0_0
2
 
11:37 PM
Aaaand the code isn't commented.
Screw you, past El'endia. :P
¯\_(ツ)_/¯
 
20 minutes till Winter Bash
 
@El'endiaStarman What about the half-plane test?
 
Oh, it's not that bad at all.
 
@NotDoorknob !
 
@BrainSteel Half-plane test?
 
11:40 PM
@NotDoorknob Really?
OH MAN I NEED THE HATS
ALL THE HATS
 
@El'endiaStarman Cut a plane in half and see if you can still fly it
 
I wonder if they'll have unusuals too
That would be cool
 
I'd bet so.
 
@El'endiaStarman Each side of the triangle cuts the plane in 2 halves. A point within the triangle will be in the "inner" half-plane of each side. Use dot-product's sign to detect which side of the side it is on.
 
mmmmmm...
 
11:41 PM
I've solved this problem before, too. Let me see if I can find the code...
 
This could probably be a good main site challenge.
 
You just need a 2D vector perpendicular to each side, or... something.
 
I can use the cross product to know if it's to the left or to the right.
 
If I remember correctly, the dot-product method is simpler, but I can't quite remember the specifics.
 
(To readers from the future, this link is probably outdated.)
 
11:43 PM
I think the cross product method should work too, though?
 
@BrainSteel Computationally dot products are much simpler
 
@AlexA. Even the logic was super pretty.
 
@El'endiaStarman 9/10 needs coordinate system
 
Coordinate system doesn't matter. :D
But it's pixels.
 
15 minutes till Winter Bash
 
11:44 PM
It's similar to how you detect what faces of a shape to render in 3D. If the normal's dot product with the vector from your "eye" is positive, you don't render the face.
 
@El'endiaStarman Oh, that was not apparent.
 
0
A: Sandbox for Proposed Challenges

GamrCorpsAdd a feature to your favourite regex flavour! popularity-contest Create a program that will take in a regex (in string form) and a string to match, and output a truthy value if it matched or a falsy value if it didn't. But here's the catch: your program should implement a new useful feature to...

 
It's really only to show how the signs are +/- depending on where the vectors are in relation to each other.
@BrainSteel Oh, I know how to do that easily.
 
You can do the same thing on a triangle, I do believe.
 
I have the vertices. I just take them in a consistent fashion and "rotate" each side by 90 degrees to get the normal vector.
 
11:46 PM
@NewSandboxedPosts This is the most broad challenge I've ever seen
 
@quartata yas
 
@El'endiaStarman That ought to work. Come to think of it, I'm not even sure that's necessary...
 
Oh, maybe dot the vector of each side (counterclockwise order, say) with the vector from that vertex to the point.
If all the signs are the same, then it's inside the triangle?
 
Yeah, that's exactly what I was thinking. I am not sure it is guaranteed to work...
 
No, it's not.
Take an equilateral triangle and put the point outside, but close to one side.
Cross products, on the other hand, should.
 
11:48 PM
@NewSandboxedPosts Someone upvoted this
 
If you take the normals to the sides, and vectors to the point from vertices, that works.
 
I don't even know what to say...
 
I forgot what the task is. Figure out whether a point is in a triangle?
 
Yeah
 
11:49 PM
@quartata Did you downvote it? I did.
 
@AlexA. Yes.
 
10 minutes till Winter Bash
 
@AlexA. What's this for?
@NotDoorknob Thanks bot
 
@BrainSteel Or, even better, vector to the point from the midpoints of the sides.
 
Prepare the hype van
 
11:49 PM
@quartata El'endia tasked us with a pop quiz.
 
19 mins ago, by El'endia Starman
Pop quiz: simplest way to determine if a point is inside a triangle?
 
@quartata Keys in the ignition
 
@El'endiaStarman That might just be it.
Though... Maybe not with absurdly scalene triangles?
 
@quartata "Simplest"
Constructing a convex hull is simplest?
 
11:52 PM
37
A: determine whether point lies inside triangle

ktodiscoThe proper way to do this is by calculating the barycentric coordinates of the fourth point given the three points of your triangle. The formula to compute them is given at the end of the section "Converting to barycentric coordinates", but I hope to provide a less mathematics-intense explanatio...

 
It may very well be the prettiest mathematical approach.
 
^
 
I mean, I suppose it depends on the language.
@AlexA. Oh this is good
 
JavaScript.
 
11:53 PM
@El'endiaStarman ...
 
4
A: determine whether point lies inside triangle

irrelephantTake the average of the three given points. This new point P4 will always lie inside the triangle. Now check if P and P4 lie on the same side of each of the three lines P1P2 P2P3 and P3P1. You can do this by checking the signs of the cross products (P -> P1) x (P -> P2) and (P4 -> P1) x (P4 -> P...

This guy says cross products
 
Convert the triangle to a set of linear inequalities. Determine if the point satisfies all of them.
 
If you're golfing, this approach is probably going to be shorter I would imagine
 
Cross products are so ugly. Maybe my engineering courses just made me hate them, but as beautiful as they may be conceptually, calculating one is a pain in the ass.
 
1 hour ago, by El'endia Starman
Such fun. No collision detection yet, but other than that, basically everything else has been implemented.
 
11:54 PM
5 minutes till Winter Bash
 
@BrainSteel Yes
@NotDoorknob I wonder what you're going to do when we get there
 
@El'endiaStarman are you detecting collisions between frames, or just at each frame? I smell a potential bug if it's the latter...
 
4 minutes till Winter Bash
 
I have some code for efficient between-frame collisions on circles and lines.
 
@NotDoorknob !
 
11:55 PM
@BrainSteel ...d'oh, I do have to take in-between-frame collisions into account...
 
I'll have to dig it up...
 
Well, the original game that I'm basing this off of doesn't.
 
Come to think of it, why not just check collisions with each line?
 
That'd work for spaceships, yeah.
 
3 minutes till Winter Bash
 
11:56 PM
@NotDoorknob I CANNOT HANDLE THE SUSPENSE
 
Missiles are point particles though (basically).
 
I wrote a little android app that involved a circle bouncing on lines at somewhat unfortunate speeds. It should handle points fine. Give me a moment.
 
> unfortunate speeds
wet
 
2 minutes till Winter Bash
 
@NotDoorknob Ahhh
-3
A: Find the nth Fibohexaprime

SeadrusJavascript es6, 152 bytes ¯\_(ツ)_/¯ x=>[2,3,5,55,89,377,987,28657,75025,121393,317811,5702887,9227465,39088169,102334155,32951280099,4052739537881,806515533049393,7540113804746346429][x-1]

Delete votes welcome
 
11:58 PM
So what happens when Winter Bash comes?
What do I have to do to get THE HATSS
 
@quartata All will be revealed in time
 
@AlexA. Can't, the answer isn't old enough :/
 
@El'endiaStarman Ah, I don't know if I can account for the line accelerating.
 
Only one more minute till Winter Bash! (@Doorknob ping)
 
@quartata I didn't know that was a thing
 
11:58 PM
@NotDoorknob I'm here I'm here
 
@NotDoorknob Smart.
 
Doorknob talks to his socks.
 
Watch SE go down when Winter Bash comes out
 
@quartata cries
 
Doorknob's talking to his socks again...
 
11:59 PM
socks are people too
 
Winter Bash has started! Go get your HATS!!! \o/
9
 
Well with about 3 questions in the pipeline I'm basically more or less 100% guaranteed to get all the hats
 
I completely missed that Alex had already made my point
 
I still see a countdown...
 
@NotDoorknob liar
LIAR
 
11:59 PM
@NotDoorknob Where do I get my hats
2
 

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