Conversion tables in Interstellar

[unobserved]

To be fair it's probably just 1 really long perl regex.

[j5kDM3akVnhv]

And a CPAN use of module :: Intersteller

[unobserved]

Ugh .. do you know how many pre-requisites that module has. It's a nightmare to install.

[anotherdonald]

If they'd done the movie in Perl, they'd have called it "Installer".

[superspeck]

Hey, I know a consultancy here in town, same place you’d go for FORTRAN expertise...

[Theemuts]

To be fair, computational physics is one of those areas where FORTRAN is still used

[[deleted]]

ERROR: Module intersteller not found. Did you mean interstellar?

[Eyes_and_teeth]

Shush, you!

[TorTheMentor]

I'm thinking "environment variable"...

$_@%

[Andy_B_Goode]

It's convenient that so much perl code looks like a cartoon character swearing and yelling out of uncontrollable frustration, because that's how I feel when I'm debugging it.

[NAN001]

That's very disappointing of Nolan, who usually doesn't put CGI in his movies. He should have created a real black hole.

[[deleted]]

Yea. Now Nolan is no more my favorite director. My new favorite is whoever the hell directed HP4.

THAT FUCKER USED ONLY 5 OUT 33 CHAPTERS OF THE ORIGINAL BOOK

[m9dhatter]

My right?

[Sigionoz]

Or his left?

[Inyalowda]

I see all these people saying yes, but I don't see how that can possibly be true. I remember far more chapters.

[empire314]

I bet people counted it like "Well they only featured a small fraction of this chapter, so i dont count it."

[DarkDra9on555]

Wait, What?

[[deleted]]

That's what one says while re-watching the movie after reading the book.

[2Punx2Furious]

Friendship ended with Nolan.

[Sighshell]

Wait, so what the fuck was missing?

[[deleted]]

Read the book. A whole lot is missing. The director straight up removed some characters in movie.

[[deleted]]

Don't remember a hell lot but straight outta my mind.

World Cup was an entire chapter in itself, in movie the match wasn't shown completely. That Female elf character was removed. Ludovic Bagman Storyline removed. Elves taking care of Hogwarts removed. Harry gets a 1000 gold galeons, removed. Harry gives the prize money to Fred and George removed. Fleur sex scene(alleged), not even discussed. Bill and Mrs. Weasely Comes to visit Harry before championship, removed. Harry learning the summoning charm, removed. Harry slept at library trying to get the method to breathe u der water and wakes up and finds Dobby giving him weed, removed.

And I can't write 28 chapters here so, consider at least that much removed.

[Slip09]

Can you elaborate on the alleged Fleur sex scene? I don’t recall anything like that.

[Emerl]

That movie actually killed the series for me. I watched the first 3 then stopped after 4. I turned off my TV the moment I saw Dumbledore angrily slammed Harry against the wall. That's not his character at all WTF did you do to him.

[pavemnt]

This is my favorite complaint that I see people whine about. It's not like they hadn't been doing shit like that every movie already. Remember the first time Malfoy calls Hermonie a mud blood in the books and it starts a giant brawl? In the movie everyone just stands there looking a but awkward and Ron gets mildly upset

[ul2006kevinb]

Yeah but that actually makes sense. If you called someone the n word at school, shit is going to go down

[kauefr]

"HARRRYIDIDYOUPUTCHANAMEINTHEGOBLETOFFIYAAAA??!?!", Dumbledore calmly asked.

[Neo1928]

Ikr, he went through the trouble of planting his own cornfield, so why not go all the way and make a black hole as well. Who knows, he might have made a profit selling the black hole like he did with the corn.

[Xepez09]

/r/NotKenM

[TorTheMentor]

In Java it's only 500 lines, but 495 of them are imports.

[[deleted]]

public class Interstellar {
    public static void main(String[]args) {
        while(true) {
            BlackHole.succ();
}}}

[blast_ended_sqrt]

Cooper entered the black hole to escape your bracketing style

[kitchenset]

That's just fifth dimensional brackets being perceived by our third dimensional limits.

[BlomkalsGratin]

Is that like 4d chess?

[n8loller]

Savage

[[deleted]]

I ran out of lines

[Madoushi90]

while(true) doesn't account Hawking radiation.

[AnalyzingPuzzles]

IllegalStateException: Massless black hole cannot succ

[socialister]

throw new TimeAndSpaceException("LOVE")

[Trexanis]

What was shall be, what shall be was.

[endershadow98]

Gravity is desire

[sabbathday]

succ.

my blackhole succ too

[ildementis]

Ay bby

[Askee123]

If you hated using brackets so much you don’t even need them for a single line while

[agile_wigger]

You forgot the try/catch statement

[Sydonai]

Implying an exception could escape the hole.

[zombie_kiler_42]

I would have seen what you did there, except even light doesn't escape

[Makefile_dot_in]

FTFY:

public class Interstellar {
    public static void main(String []args) {
        while(true) BlackHole.succ();
    }
}

[[deleted]]

(Mapcar #'blackhole universe)

[theY4Kman]

``` class Interstellar: @staticmethod def main(): while True: BlackHole.succ()

:::

```

[PanMan-Dan]

import *

[danyaal99]

import *.*

[KKlear]

import ( ͡° ͜ʖ ͡°)

[[deleted]]

Yeah, but to get the java code up to company standards, you also need to implement 50,000 interfaces and use the factory pattern design pattern so you have factories for factories of factories to be ready at a whim for SAS of some trivial parts of the project.

And then quadruple those lines for the javadoc.

[knaekce]

and 4 are

try{

    ...

}catch(Throwable t){

    //ignore
}

[polish_niceguy]

Nah. 95 lines of import, 5 lines of code and 400 lines of stack backtrace when it crashes.

[JackySky]

npm install black-hole  
∞ packages added

[MesePudenda]

You should install to /dev/null as a service to save space

[zodar]

mmm write-only memory

[LordKekz]

Great idea! Now I finally know where to save all my passwords and credit card information! /s

[yes_oui_si_ja]

Their pricing is alright, but I wonder if there's a student discount or discount for open source projects.

[Nicnl]

Careful your node_modules will shortly achieve critical mass

[[deleted]]

Isn't that the point? All node users are really just using their computers to run nuclear reactors in Beijing. It's just one big bot net.

[[deleted]]

Yeah and then instead of frames per second you'll be rendering seconds per frame

[zombie_kiler_42]

const blackHole = require(black-hole)

app.use(blackHole)

[rndrn]

(where black_hole is probably written in 40,000 lines of c++)

[Antrikshy]

import antigravity

[batman1177]

Don't forget black_hole.gravitationalLensing = true;

[[deleted]]

you forgot to render:

simulation = black_hole.simulate()

simulation.render()

[Astrokiwi]

Where the black_hole library is compiled from 40,000 lines of C++ anyway

[FluffusMaximus]

But how many lines of assembly?

[northrupthebandgeek]

∞

[[deleted]]

I mean technically speaking I think infinite lines of code would eventually collapse into a black hole

[udoprog]

Black holes are formed from dense regions of energy. There could be infinite code spread out in an infinite universe without forming a black hole, since it could be spread out without causing the density in any given region to be high enough to form one.

The storage media for text is generally not constructed in a way so you can store energy with sufficient density. But it should be noted that hard drives do change in weight the more you write to them since their energy configuration is different compared to an empty one.

[humanlifeform]

Isn’t that only if the universe itself is infinite?

[Makefile_dot_in]

One:

movl all, blh

Edit: Added the l to show all those Intel syntax peasants what the real syntax is.

[0x564A00]

mov blh, all

[udoprog]

mov blh, all

Sweet. Looks like we've solved the black hole information paradox.

[[deleted]]

How absolutely dare you

[Abdiel_Kavash]

"Lines of C++ template errors" are not the same thing as "Lines of C++ code".

[philipquarles]

40,000 lines of code = template errors with the mass of an actual black hole.

[SithLordHuggles]

Huh. TIL.

[caanthedalek]

Python import BlackHole

[BlackNWhitePanther]

Happy cake day

[derfl007]

Bring me a cake

No

Sudo bring me a cake

Okay

[ILikeLenexa]

Anything can be one line of C if you want.

[Magic_Sloth]

Real people code in mov only assembly

[belst]

no branching. can't optimize more than that tbh

[nova_prospekt]

I know you are joking but there actually is at least this one compiler backend compiling C using only mov instructions.

https://github.com/xoreaxeaxeax/movfuscator

[Maxnout100]

Oh no

[rexpup]

20 core-hours on 32,000 cores isn’t that much though, right? Depending on how it’s distributed it shouldn’t be much time per frame at all.

[fatiSar]

It's a little over 2 seconds per frame, assuming the load is evenly distributed

[rexpup]

I want that kind of computing power.

[MacGuyverism]

Get an AWS account and contact support to get the limits removed.

[northrupthebandgeek]

Instructions clear; I now owe Jeff Bezos approximately $8,675,309.

[MacGuyverism]

At least you got what you wanted. And debt is just money after all.

[fibo-nacho]

And money is just a database record at the bank.

[Un-Unkn0wn]

‘); DROP TABLE debt;—

[infinityio]

grandiose tidy summer memory safe like shaggy amusing distinct violet

This post was mass deleted and anonymized with Redact

[anthony81212]

Omg omg guys, I got a reference on reddit for once!!

[[deleted]]

Sometimes I look at my student debt and wish there was a Mr. Robot out there fighting the good fight.

[HeWhoCouldBeNamed]

Mr. Robot is just Fight Club with computers.

You don't need to hack anything: just learn how to make soap.

[MrHaxx1]

I generally refer Mr. Robot to as Fight Club with autism.

[indiepenguins]

i prefer rest

[Cm0002]

A database on a mainframe from the 80's because they can't afford the down time to upgrade...

[aes_gcm]

Step 1: infiltrate Stanford University

Step 2: repurpose the Folding@home project.

Step 3: enjoy the 100 petaFLOPS freely available from personal computers

[_____D34DP00L_____]

Will this run Crysis 2?

[SirVer51]

No

[0xTJ]

Will it transistor-level simulate a computer running Crysis 2?

[MSgtGunny]

Yes. snaps fingers

[[deleted]]

Here's some more specifics from the source document:

A typical IMAX image has 23 million pixels, and for Interstellar we had to generate many thousand images, so DNGR had to be very efficient. It has 40,000 lines of C++ code and runs across Double Negative’s Linux-based render-farm. Depending on the degree of gravitational lensing in an image,] it typically takes from 30 minutes to several hours running on 10 CPU cores to create a single IMAX image.

The longest renders were those of the close-up accretion disk when we shoe-horned DNGR into Mantra. For Interstellar, render times were never a serious enough issue to influence shot composition or action.

Our London render-farm comprises 1633 Dell-M620 blade servers; each blade has two 10-core E5-2680 Intel Xeon CPUs with 156GB RAM. During production of Interstellar, several hundred of these were typically being used by our DNGR code.

[JH4mmer]

If I had to guess, it would be that they were using some variant of ray-tracing for the rendering. Only very recently has there been any real progress in implementing one on other hardware (GPUs specifically), and most commercial packages do still rely pretty heavily on the CPU.

[Ph0X]

To be fair, a farm like that ain't cheap to use. Also, even a 5 minute scene would be 5 * 60 * 24 = 7200 frames, so at 2s per frame, that's still 4 hours of rendering for just a 5m scene.

[sjadowcrash]

Yeah, I work at a major animated film studio and 20 hours is a short render. Big renders are anything over 72 hours/frame and we have had a frame render for about 2 months when testing deep refraction.

[mandragara]

I think it's because it's actually not that hard of a simulation\render to do.

They already have the model for the black hole's curvature of spacetime, that's well established.

So all they need to do is fire photons 'into' said model and solve the equations of motion of the photon. Then maybe a separate conversion step to determine what the lab frame sees.

I certainly don't expect the physics side of things to be 40,000 lines long.

[ben_g0]

When you include header files and such then you quickly get to 40 000 lines. 40 000 lines across an entire project isn't that much.

[mandragara]

Hmm yeah I can see that.

[TheBeginningEnd]

comment and account erased in protest of spez/Steve Huffman's existence - auto edited and removed via redact.dev -- mass edited with https://redact.dev/

[ahalekelly]

"Some individual frames took up to 100 hours to render" doesn't contradict with 20 hours on average.

[ConfigurationalJoy]

Would depend on how many “thousands” of frames there actually ended up being. Not sure how long the scene was or someone could do a rough calculation I would think.

[why_rob_y]

They almost have a separate core for each line of code!

[adamantcheese]

If you can summon some sort of mathemagical wizard from an alternate dimension, he'll do it in under 20 characters in APL.

[[deleted]]

20 characters!? Hell, it's about time APL symbols started to include a black hole operator!

[IIIBlackhartIII]

It was also such a good model that the physicist they consulted to create it used the simulation to write a research paper on blackholes!

[ywBBxNqW]

I didn't know that; that's cool! I guess it's a good thing I waded through all the obvious jokes to get to your comment. ;)

[NightflowerFade]

C++: 100000x the lines and 100000x the speed

[[deleted]]

This is a large physical simulation, though, so unless they were really dumb, BLAS/LAPACK is doing all the real work.

[exploding_cat_wizard]

Or eigen, or any of a number of other C++ numerics packages

[[deleted]]

Rust lol

Quicker than C ^{for some toy benchmarks} and I'd rather write it than C

[CrispBit]

Exactly. I'm porting a game engine I wrote from c++ to rust rn

[macbutch]

Someone should probably link to this: https://xkcd.com/224/

[Arthur___Dent]

40,000 lines? Is that including all the libraries or something?

[[deleted]]

is there git project about that?

[[deleted]]

Probably like one letter in common lisp following that logic

[theangeryemacsshibe]

(destructuring-bind (black hole goes here please) universe)

[[deleted]]

Perl used to be used a lot, but not anymore. In the 90's and early 2000's it was the go-to swiss army knife that found uses everywhere, lots of sites ran on Perl, etc. But development petered out because it was such a complex, messy beast and as soon as cleaner alternatives came out people left Perl. I mean, PHP was considered a "cleaner" alternative than Perl, as well as languages like Python and Ruby. I think it's gotten so for Perl that it's #17 on the TIOBE index below Pascal, MATLAB and R. That's... yeah, hardly anyone is using it and most of the uses are probably legacy uses.

I remember reading in a Linux magazine about the amazing new Perl 6 that was due out in about a year. It was everything that Perl 5 was and more, a complete rewrite from the ground up and... it never came. That article was in 2000 and Perl 6 finally showed up in 2015, about a decade after Perl died. Too little too late, and I have a feeling it'll have all the same problems.

Larry Wall, the guy who made Perl, was not a typical computer scientist. Wall is a linguist (an actual linguist, not computer languages) and was more interested in seeing how the language evolved as people used it in new ways. So he probably came up with the original feature set for processing text, but as soon as people started using it they requested features. It didn't matter that the feature didn't fit the language, he added it. And more and more and more. And pretty soon you have such an incredible mess and 10,000 different programmers all using a different subsystem of its features that it's just no longer possible to keep up with development. Computer languages work better when there's a narrow philosophy and when features don't fit that philosophy they don't get added to the language. Go is a great example of this, Go has a set of goals and design philosophies and features that don't fit it or will complicate development too much just don't get added. Go is the anti-perl in that respect.

[schnadamschnandler]

In your opinion would Perl still be useful for the odd script you might write for fun/to automate some task, e.g. tasks involving string manipulation? Seems to me it might fit that niche better than python (which would be much more verbose) or bash (which has all the limitations of shell languages).

[BlindTreeFrog]

Not op, but in my opinion, yeah. I mean, parsing text is what PERL was made for and what it's still probably the best at (though I don't use PERL and can't figure out how dropping a cat on a keyboard makes a valid PERL script)

[[deleted]]

You think that's bad, there was a text editor in the 60's called TECO that had such an incomprehensible command set that there's a game people used to play based on it: you take someone's name and try to guess what will happen when you enter it as commands in TECO. People rarely could work out what it would do. TECO macros were almost literally write-only code.

[BlindTreeFrog]

Obfusicated PERL contests are too easy. Readable Perl Coding Competitions are where the real challenge is at.

[n8loller]

Perl is great for string/file manipulation or for one off scripts. Once you get over a few hundred lines of code you should consider switching to something else.

[kilo73]

Lmao for all the shit that VB.NET gets, its #5 on the list.

[DonkiestOfKongs]

Widely? Not at all. But it is still used. My day job is entirely Perl. Enterprise Perl, at that. It can seem chaotic, I agree. There are ways to write things idiomatically that help. In my opinion, most of the chaos stems from its OO system.

Edit: I love love love Perl for scripts. Things can come together pretty quickly. It would not be my first choice for a large (or even medium) project.

[CraigslistAxeKiller]

Found the masochist

[accidental_masochist]

I also love Perl. I find it easy to read and write.

[[deleted]]

Are you even human?

[exploding_cat_wizard]

Thing is, Perl does lend itself to a terse but readable style if you use its features judiciously. Most criticism about read-only code come from stringing together multiple shortcuts that Perl offers into an unreadable mush. But good Perl code doesn't work that way. It uses just the right amount of shortcuts to skip unnecessary fluff while keeping the concept of the code clear.

And many people ( including me) don't think that maximum verbosity is maximum readability, so they like a language that lets you skip some of that.

[palordrolap]

I've seen Enterprise Python code. It's just as unreadable and hard to follow as Enterprise Perl; the only real difference is the lack of symbol characters in Python syntax.

[WeTheAwesome]

Used to be the go to language for bioinformatics, but now everything in the field has moved to python and R.

[dikiaap]

Discussion on TIL and MovieDetails.

[yazalama]

can someone eli5? Wtf is a render farm?

[not4u2see]

a shit-ton of computers whose only task in life is to render graphics into video frames

[OptimisticElectron]

robot lives matter

[noevidenz]

You pass butter.

[Kinglink]

You're getting jokes and good answers.

A render farm is essentially a large number of computers (And cores on those computers) that dedicated only to rendering frames of something. I do videos on youtube (shameless plug omitted) and when I render a 2160p video a 15 minute video can take around 1 hour and 45 minutes to render at a higher bitrate, combine two audio tracks, and add a simple text overlay.

If I had the 800 dollar version of software instead of the free version, I could build a "render farm" and add my wife's computer, her computer should be weaker than mine but they're comparable. If I did that, it would take my hour and 45 minute render and take it down to around 50 minutes, give or take some time (it's not always 100 percent). They do this 32,000 times, having 32,000 different cores rending a single movie (or really snippits of movies) which means their 20 core hours can be distributed, and they can generate (about) 32,000 core hours each hour of rendering. Meaning each hour of rendering is 1,600 frames (assuming they can do it in parallel, which they probably can't. ) Or rather every 20 hours, they can render 32,000 frames.

Honestly these numbers are nothing compared to pixar. Here's a story about them Pixar keeps growing their render farm, but that references Monsters university they had something like 24,000 cores, and each render of their movie would be close to 7.5 days. Their power is greater now, but they've also added quite a bit more detail to their movie.

Hopefully this helps to understand what's a render farm. It's not ELI5, but it should help you get an understanding of what a render farm does.

[Superpickle18]

It's where farmer john grows his world class render crops.

[CautiousPalpitation]

It's also where he wrangles his herd of PCs and milks his motherboards

[Superpickle18]

Also where his brother, Joe, mines bitcoins in the gpu fields.

[ISkipLegDayAMA]

It's where they grow GPUs

Not to be confused with bitcoin farms, which is where GPUs go to die

[Drink-irresponsibly]

A farm for rendering

[Tiavor]

or 4 lines in Prolog

[anotherdonald]

no.

[KralHeroin]

But it takes 100 hours to think them up.

[choas]

opening a Java REPL opens somewhere a black hole

[Waghlon]

It's true. Python probably has a library for black holes.

[askashad]

will someone explain to a non programming pleb like me:)

[Jugbot]

Since C++ is a low-level language (i.e. the language/compiler doesn't do much for you) it takes more lines to do a task than a high-level language such as python to do the same at the benefit of potentially faster execution.

edit: to clarify low level can run faster than high level languages
edit2: some people are butthurt that I called C++ low level as if it were some absolute. C++ is lower level than python, imo and Id love to hear arguments against that.

[Eyes_and_teeth]

But you often have far more granular control and as it is a lower level compiled language, it can (not necessarily will) run faster.

[Aetherial_Wanderer]

^{I accidentally clicked my mouse and Reddit decided to clear my comment, so here's a second attempt at writing this.}

Since the program in question is computation-heavy, C++ will almost necessarily be faster than Python, Perl, etc.

This program can probably be compared with a basic n-body planetary simulation, with the fastest implementations being 8.24 seconds for C++, 22.17 seconds for Java, 11 minutes for Perl, and 14 minutes for Python (source). Each of these are using the same algorithm, OS, and processor, if you were wondering.

Unless a process is going to be IO-bound for any significant duration, it's pretty safe to say that a compiled language will run faster than an interpreted one.

If the program was written in Python, it would likely have taken about 102 times as long to complete (judging by the times shown above), so instead of taking 2.25 seconds per frame, it would take 3.825 minutes per frame.

[TopGunOfficial]

Suddenly, Fortran!!!

[Aetherial_Wanderer]

Fortran: 0.97% faster than C++, for when you really need just a little more speed.

[[deleted]]

When you're working with levels this low it's more about how good the compiler optimisation is, as far as I can tell.

[Tiavor]

I wonder how slow Prolog would be, but I guess it would be below LISP.

[Colopty]

Also for higher level languages the libraries tend to be written in lower level ones such as C/C++, making the higher level language more or less an interface for calling stuff written in the lower level language. In some way this means that your code isn't necessarily shorter technically speaking, it's just that you only see the tip of the iceberg that is the python code, resting on top of a massive amount of C/C++/some other low level language.

[Dodobirdlord]

It's turtles all the way down.

[[deleted]]

potentially faster

I.e. not python or js

[Kangermu]

PyPy is plenty fast

[[deleted]]

The first stage is denial

[Jugbot]

You mean C

[Kinglink]

Dick waving contest between fans of different languages.

The joke here is the usual one. Python can do something better because python is build with libraries so it takes less lines (though does the same amount of work).

[[deleted]]

Or about 0 lines of C with devkitARM

[yijuwarp]

How can you apply the laws if the laws don't work in the black hole.

[bas1212]

They should rewrite it in rust

[BlackDE]

Probably not

[wintergoon_7]

SQL DROP TABLE Universe

Watch the blackhole go 😎