Coding Challenge 177: Soft Body Physics

[@TheCodingTrain]

🚂 Source code and passenger showcase: thecodingtrain.com/challenges/177-soft-body-character 💫 Support the Coding Train and watch ad-free on Nebula: nebula.tv/videos/codingtrain-coding-challenge-177-soft-body-character

[@CodeParticles]

@TheCodingTrain, Huge fan sir thank you for this upload! I know you're incredibly busy these days but with all due respect, I feel that you should have done this from scratch like you've done with the quadtree tutorial, 2d physics, the boids tutorial, and countless others instead of using an external library!

[@tile-maker4962]

This is great. Do you think it is possible to integrate angles instead of springs between points to make it? Like a spring angle or something?

[@TheCodingTrain]

@@CodeParticles I appreciate the feedback, you might like to see the spring challenge which has some more implementation details! kzbin.info/www/bejne/iKOQZnufjdaontk

[@CodeParticles]

@@TheCodingTrain Thank you! 👍

[@mathcat4]

Amazing you found time to post another video, your enthusiasm always motivates me to program again!

[@yohansaba5179]

Thank you for everything Daniel, you have such a wonderful soul.

[@ezrakornfeld8436]

He’s like the bob ross of programming

[@baconheadhair6938]

Don’t do it dude you have much to live for

[@xnick_uy]

This is the Coding Challenge video with the highest quality so far: well scripted narrative, lots of tips and logical arguments, an easy to follow and well organized code. Also, the part about how to set up the html and the imports is very appropriate. The video edition also superb. This goes to show your experience making these videos, and also dedicating so much time to the book possibly has an impact on your story-telling style, for the better.

[@TheCodingTrain]

Thank you for this feedback, I really appreciate it!!

[@ethanmendelson6978]

@@TheCodingTrain Definitely the best presentation yet. Got halfway through the video without opening my IDE because I was fixed on just watching.

[@Lurkingbird]

@@TheCodingTrain do more apple ii videos it is so good

[@hotrodhunk7389]

I just started learning coding. After finding your content it is like a breath of fresh air! You make it seem so fun! The ability to do anything with a computer is really cool and powerful. Thanks for your videos.

[@zer001]

Danke! Thank you!

[@TheCodingTrain]

Thanks for the generous support!

[@Sasham4]

Thanks!

[@sambeard4428]

When I watch your videos, I feel you talk to me, not just saying something, but actually talking to me, like I'm a child. But not at all in the negative sense. Your instructions are clear, friendly and unassuming. I hope you either have kids or will some day because I'm sure they'll turn out as marvelously curious little beings. Little bit of a weird post, I know, but this is just how I like to express my gratitude.

[@Sayamak]

Daniel really is a great educator and entertainer. Thank you Sir for your videos and especially The Nature of Code where I am currently enjoying the chapter about fractals.

[@mmilerngruppe]

Thank you, Daniel, your videos always make me happy!

[@wxr]

I receive every video of the Coding Train as it was a Christmas gift and I was 5 years old ! I'm so happy and excited !

[@AlHearn]

Daniel, I hope you continue to make your videos. Thank you for the great job you do.

[@tehcakelie17]

This is amazing! this came in clutch when I've been researching simple way to create softbody physics. Thank you for this!

[@zer001]

nice to have you back.

[@AaronAsherRandall]

I have always loved your videos! I am a novice game programmer in C# and Unity, it seems like a lot of these tools in Javascript could be expanded to make games with complex physics and graphics in the browser!

[@RedEyedJedi]

OMG you're writing a new version of the nature of code :D I have the original and its my favourite book by a mile.

[@Bromon655]

This is gonna sound crazy but the conversation about repetitive code starting at 15:04 really helped me visualize the purpose of object oriented programming as opposed to procedural programming. Noobish and oddly specific but still

[@TheCodingTrain]

I'm so glad to hear this!

[@richardsymes1844]

So good to see you back and with another interesting challenge.

[@niczoom]

Super clear explanations. I learn something new every video watched!

[@redpug5042]

it sure would be fun to write the physics engine on your own. I just spent about an hour or so making a quick engine with a system for springs and force fields (a force applied to specified particles based on the particle's conditions like location, hence "field")

[@Haapavuo]

Greetings from Finland! 🇫🇮 That is where you inspiration came from this time! 😉

[@RupertBruce]

I don't have notifications on and it took YT 2 months to suggest this. I have surely watched enough of your videos to get instant feed updates regardless of the notification settings.

[@mrthomaschannelearth]

Code refactoring is one of the few things that bring me true joy in this life

[@IzUrBoiKK]

I am mainly a python programmer, but often use your videos as a tutorial for things. Thanks bro for all this. ❤❤❤

[@NinjarioPicmin]

0:30 that is truly beautiful. Any idea on where to read up on how that was done?

[@WhateverOwO]

it's probably pressure soft-body physics with really low pressure and k parameters

[@nagesh007]

Awesome , Mind Blowing 😍

[@chopstix9093]

its been too long since a coding train video ;-; thank you!!!

[@WilderPoo]

Amazing! Thank you for really demystifying soft body physics. I thought it would be much more complicated than a few springs 😄

[@spacelamaglama]

what a nice video! You are like the Bob Ross of developing

[@jetexeryt1127]

I like how i can watch all coding challenges, even those from 6 years ago and litterally the only thing that changed is his hair color (and this is the best thing that could happen)

[@s81n]

Omg I had no clue you wrote The Nature of Code. I adore that book!

[@kapilishere]

It was fun to watch, I'd definitely code my own squishie character!

[@stormwix]

1:32 The second picture to the left kinda reminds me of a Hyperbolic tessellation 🤔. Anyone else?

[@nimlhug138]

WOW... I got a flashback of a younger version of me having fun with SodaConstructor back in 2000-2001

[@sodaplayer]

Ooh, I loved playing with that. >.> I even still have my username named after it.

[@parkeranderson7599]

Soft body physics... my doctor has been wanting me to work on this!😉

[@고가-y7o]

Thank u so much! I can’t express how much your video helped me but I ‘m surely that you have saved the whole of my college life!😂

[@pierregof]

Thank you Daniel 🙏

[@jayjasespud]

This train sure has come a long way since departure.

[@dreamofeternalhappiness8001]

Yay. 👽✌️ Keep making programming fun for everyone and become rich. You are super fun. Knowledge is boring only if there is none to play with it. ❤ * individual physical position vector.

[@wlockuz4467]

Can't wait for Nature of Code!

[@Parasbhattarai1]

❤❤love everything done for us and teaching in. Such a cool way❤❤❤

[@shachargabbay1496]

wow. you are simply a magician. I've been dreaming about this for years!!!!

[@kimeg7294]

Hello Daniel, this was very fun to watch and educational for learning how particles behave based on soft body interactions. Would this principle be applicable for simulating a "verlet cloth" effect on particles forming a 2D rectangular shape?

[@TheCodingTrain]

Yes! You can see more about this in an older video: kzbin.info/www/bejne/oKPOkJ-FnMSjjKM

[@KakoriGames]

Fun fact, soft body simulations actually have a lot of similarities with finite element analysis. In fact, one could use a soft body to simulate a ideal truss structure. When it comes to 2D, or 3D, structures, the main difference becomes that the rigidity of the system is calculated based on the shapes between springs, called elements, and there's some resistance to rotation in the nodes, so a square shape doesn't fall flat. But the idea of modeling a continuous body as a set of discrete points forming a graph, that exhibit some degree of rigidity between them, is very much akin to elastic finite element analysis.

[@PeranMe]

Oooh, new NoC version! Pardon my drooling here...

[@cpasket122]

How the hell did you comment 7 hours ago if the video was released 5 hours ago???

[@PeranMe]

@@cpasket122 What? I'm just that fast, ok? Keep up! (Subscribers sometimes get videos early)

[@cpasket122]

@@PeranMe oh, thought you were a time traveler or something lol

[@Liloulalalala]

Yeeeees new coding challenge !!

[@donnierussellii4659]

Thanks for helping the programming community own the toxi libs.

[@partymarty1856]

glad to see you making video (I've watched one so far"

[@anon_y_mousse]

Are you going to do rigid body physics next? Maybe throw a squishy sphere at a brick wall at varying speeds and animate it bouncing off and breaking through.

[@LoPhatKao]

pretty cool that you're doing a rewrite of NoC read it last year and played around with Processing niftiest sketch I did was an ant pheromone trail behaviour simulation, reminiscent of SimAnt surface view

[@pbenikovszky1]

ah finally a new video :) great as always :).

[@matthewhook3375]

Novice here, please could someone explain why referencing a global variable from within a class is considered bad practice (as discussed at 20:38)?

[@KnakuanaRka]

I need to catch up on the Coding Challenges.

[@DOROnoDORO]

RETURN OF THE KING

[@robinkelmen6332]

Hi, Loved the video! Would you be able to do a video with collision detection between 2 shapes consisting of a set of points and springs?

[@offtheball87]

I'd love to see the making of the final character!

[@Hoobizone]

Such a great content! Thanks!!

[@Michi0-0]

You are the nicest guy ever❤❤❤

[@codex57]

Génial !!!

[@Freestila]

I never did javascript. I code java for a living, but js and p5 was new to me :) But this looked soo fun, that i wanted to try it. got some problems with preview in vs code (since web editors are not my thing...), but it was really fun :) So thanks for that :)

[@nathanroed6924]

please do a series where you make a rigid body physics system without physics libraries like box 2D

[@vsueiro]

Hi, Nathan! In his Nature of Code playlist, Dan builds the basics of a physics engine from scratch… It’s just amazing!

[@nathanroed6924]

@@vsueiro thanks, I'll be sure to watch it!

[@zer001]

07:24 is this like the using system.windows.forms in C#?

[@beefox__]

fun fact! the youtuber who explained recently how jelly car worked, he actually made jelly car!

[@mileshunter3280]

Great video. What's the name of the tune at 3m30s?I can't get it out of my head.

[@olasoderlind5685]

more videos , fun watching. :)

[@cypher2960]

hi daniel. thank you for everything, you've tought me alot. but could you please try to demessify you playlists please. you have so many greate tutorials and course but they are all out of order and sometimes missing. thankfully someone else has make a playlist of you coding challanges. you've tought a whole lot but honestly i makes my head explode going through it all to find the ones i want. i would learn alot more if your playlists and courses where organized in your channel or a website per say. just a segestion.

[@drobotk]

Would it be possible to make 2 buddies collide and bounce together using this library?

[@felipe1876]

i understand 15% of the eps, but it is so cool even so

[@itsjase92]

Is there a reason you prefer the p5js web editor over something like openprocessing? I only recently discovered it but it seems much nicer

[@Masda.X]

Thanks a lot sir!

[@emilie1977]

wow good subject! I want simulate my home under earthquake ;)

[@PS3centere]

when destructuring you can write {VerletPhysics2D: physics} to rename the destruct.

[@TheCodingTrain]

Oh! I did not know this!!

[@alexandermcclure6185]

but how do i make the springs themselves without toxiclibs :(

[@andrewcrook6444]

Don’t they have dampeners with springs?

[@mthia]

another coding challenge nice!!!

[@joshblitz194]

Is there a circuit emulator playlist on this channel?

[@bwremjoe]

What about detecting and resolving colisions between two soft body objectS? Sounds like a can of worms ^^'

[@pablobribiesca2596]

I was like "Ohh this reminds of Jelly car... Great game and amazing memories with my brother" Popped up out of the blue

[@jf4715]

I miss your videos!

[@tomoki-v6o]

new to the channel , thank for presenting this beautiful topic don't you notice the 3D illusion effect 23:55

[@ToastaToast]

I'd like to learn more about object destructuring

[@deanolium]

It's pretty straight forward. Say you have an object `X` with the properties `a`, `b`, and `c`. You can access these by doing: X.a X.b X.c You can also assign these to local variables to make it easier to access: let a = X.a let b = X.b let c = X.c Object destructuring is a thing which lets you do all this in a single line by doing: let {a, b, c} = X This then creates local variables which are set to the properties on `X` that have the same name. You can use this to pick and choose which properties you want: let {a, c} = X // This only picks X.a and X.c You can also rename properties: let {a: newA} = X // We now have a variable called newA that is the same as X.a Finally you can store the remaining, non-picked properties using the rest operator `...` let {a, ...otherProps} = X // We now have the variables `a` and `otherProps` where `otherProps` is an object with properties otherProps.b and otherProps.c It's all basically shorthand but very, very useful.

[@o_2731]

I really regret i didnt find this video when i started coding

[@aliciadelpino8209]

I'm doing it on vs code and it says that 'GravityBehavior' is undefined and that it cant access "physics" before initialization :(

[@TheCodingTrain]

Can you pop into the coding train discord we can help there! Link in description.

[@aliciadelpino8209]

@@TheCodingTrain Thank you for replying so fast! that's amazing, I will do that, thank you!

[@zewela]

Does anyone done that in Visual Studio Code? I have problem with toxiclibsjs 🥺

[@namelastname4077]

Another Dane saves the day. They invented C++, PHP, C# and V8

[@darkfrei2]

Is it code for slime and truss physics?

[@russellg3775]

Wait, new edition of The Nature of Code coming?

[@TheCodingTrain]

Slowly but surely!

[@01binaryboy]

Buy the Book(Nature of Code 2nd edition) option not working

[@TheCodingTrain]

It's not out yet, the site is just a preview! (old version: natureofcode.com/)

[@codingcompetitiveprogrammi6118]

can you make video about algorithm and structure sir you should become professor and teaching in highest university like MIT and harvard

[@alwysrite]

jesus ! you have risen from the dead ! happy easter : )

[@howardalien2720]

How would one make this without a physics engine? Like from a raw programming language?

[@garrethutchington1663]

Learn the basic principles of physics and code it yourself 😊

[@gower1973]

You don’t need a physics library to do what he did here, it’s pretty simple stuff, have a look at his spring and pendulum videos, I took what he did there and implemented it c++ with direct 2d as the canvas

[@deanolium]

The paper he linked to has the basic formulae needed to create this. Basically it's about figuring out what the next position of a point is based on the previous position and acceleration vector applied to it. Then you add in the constraints, but rather than it be fixed, you use the constraints to change the acceleration vector applied to the point based on how far from the 'ideal' length the point is. Add gravity and you get your own physics engine.

[@howardalien2720]

thanks guys

[@gknomics]

hey daniel i tried copying the code but on my end it isnt working can you pls explain?

[@gknomics]

btw really great video

[@lucbloom]

The JellyCar update is triggering a revisit of softbody physics projects by a bunch of devs :-)

[@Zzkkb98]

The only place wheyi feel that i can code what i want

[@makershake8040]

Coding Challenge: Atom rendering like minute physics in this video kzbin.info/www/bejne/jWO7k2V9e7Blr8U&ab_channel=minutephysics I think this would be an adequate challenge and addition to the playlist.

[@euglossine_tristanwhitehill]

❤❤❤❤❤

[@gorillasun]

Juhani, look! You're on TV!

[@ernest3rd]

🤯

[@x_czt]

The ToxicLib is the next Golan Levin

[@goatman86]

But does it jiggle?

[@SleepyGaryBASS]

👍👍

[@superdepressif6047]

i missed you 😞