Coding Challenge #7: Solar System in Processing - Part 1 (2D)

[@Nerdthagoras]

This is fantastic. You are speaking your mind as you go. This is a highly valuable teaching tool.

[@TheCodingTrain]

thank you!

[@dashl5069]

You are amazing!!!

[@tylerwilson7214]

It's cool how you don't do a bunch of takes to have one smooth, flawless video. Instead it feels more like I'm in a classroom and learning extra from your mistakes. Thanks for the vids.

[@Graywoolf25]

I love the way you teach and explain. I wish my Java professor would show a fraction of your motivation. God bless man keep doing what your doing.

[@CloroxBleach-fl8ky]

whats school do you go to? my teacher sucks aswell so we might go to the same one

[@marcusaureliusregulus2833]

Is he using Java? I am new and I don't know

[@AAAAAA-gj2di]

@@marcusaureliusregulus2833 Processing is based on java

[@marcusaureliusregulus2833]

@@AAAAAA-gj2di ok thanks

[@magsudhajiyev7810]

You're the person who i looked for to find among my teachers in university. It's so fun to watch your videos and get inspiration from them. Thank you for this amazing job. Good luck :)

[@TheCodingTrain]

+Magsud Hajiyev thank you!!

[@LordBax]

You may never see this (and it is also a sentiment shared by others) but I just want to say that the fact you keep in all your mistakes are invaluable in teaching me how to code. It makes these videos not only entertaining but by showing how you make mistakes and then show how you rectify them teaches me how I can do the same.

[@TheCodingTrain]

I do see this! Thank you!

[@lhpaoletti]

Watching you do this while ignoring a couple of physics' laws got me inspired and do my own simulation where real physical laws would apply! Thank you so much!

[@marks3208]

Discovered this channel few days ago. You are literally now my new mentor. Gad! I love your enthusiasm.

[@mctuble]

This right here proves the value of a good university and good professors. I went to a university where the subject matter was difficult with professors with thick indian accents along with other accents. So step 1: hear what they say step 2: decode the actual words step 3: apply to the context of the lecture and by the time I'd decode the words they'd be onto the next one. If you ever asked a question he'd say this is simple and just say the same thing but slower. I do wish my universities professors had your passion and I hate to say it but because it would have benefited my education... lack of accent.

[@jikojj3680]

mctuble is it only indian accent u have problem with or does the professor have to be native english? If the latter then would Canadian or Aussie be acceptable for u?

[@CMaC253]

You seriously have no idea how much you revitalized my understanding of why I veer towards programming and Computer Science as a passion. I've been reading The Nature of Code for a while now and lamented the fact that I couldn't find any good Processing tutes online, but I never realized that you've been here the whole time LOL. Thank you Daniel!

[@TheCodingTrain]

+CMaC253 Thank you so much, I'm so glad to hear!

Thanks David, i enjoyed so much how you deal with your mistakes, more mistakes = more "how to resolve problems " essential skill in programming (adding your enthusiasm = more pleasure & fun) merci ;-)

[@TheCodingTrain]

+laurent Mattlé Thanks so much for the nice feedback!

[@yxmordarbert]

You have a new fan! Love how you explain all your mistakes too. Great balance between fast pace and good insight in your thought process.

[@griseld]

I love the parts where you think you figured out why something's not working and then you realize it's ok, that's not the problem and you need to find it elsewhere, so funny! :)

[@TheCodingTrain]

Thank you!

[@ABaumstumpf]

A few things: For solar-systems all planets should rotate in the same direction (if not the orbits would be unstable). the orbit-speed should be related to 1/root(distance). And it would be good if the planets and moons don#t constantly collide :P

[@redhen]

Good info, thanks. Do you know if orbit direction also refers to satellites (moons)? Oh -- and what about individual spin of a planet/satellite?

[@ABaumstumpf]

If there are several moon orbiting a planet then yes - all in the same direction. The spins of the planets? pretty much. all the moons in a star system? kinda yes - they normally follow the rotation of the planet. Even planets can sometimes go the other direction, but this is rare due to the way they form. Only if something big happens and slings planets around will you get different orbital directions. the rotation of the planet is not linked that strongly, but for our system 6 out of 8 planets spin the same direction as they move around the sun. And moons too - they pretty much all follow the spin of their respective planet. this mostly comes down to how star-systems form. When a gas-cloud starts collapsing to form stars and planets it will have a slight spin. and the more the cloud collapses the faster it will spin (conservation of momentum). But because this is the whole cloud it also means that everything formed that way will spin in the same direction. Only if something happens like planetary billiard or baseball will a planet move very differently.

[@redhen]

ABaumstumpf Thanks!

[@JonathanChute]

Also, I'm pretty sure solar systems are relatively flat, are they not? That is everything rotates on the same(ish) angle and the example video at the beginning where you have planets going sideways, vertically, and everywhere in between, but in actuality all the planets would be on a similar plane. From my limited knowledge the only changes in the planet rotations are speed and radius.

[@RedHair651]

@@JonathanChute That's correct. The orbital planes vary a tiny bit but overall it's all in the same plane.

[@XGamersGonnaGameX]

Orbital velocity is dependent on distance from sun so the closer planets should orbit faster.

[@paulthecurtains2285]

It's good to see the mistakes you make and then the debugging. I'm learning such alot from your tutorials.

[@TheCodingTrain]

+PAUL THE CURTAINS Thanks, I'm so glad to hear!

[@smitr376]

It's like coding 'No Man's Sky'

[@mmtf]

so close! Just the procedural generation and No Man's Sky killer.

[@AcornFox]

Except this works.

[@tiileaf]

The multiplayer here is better than no man sky's

[@RobertMan268]

Its completely unlike coding no man's sky, i will tell you why if you have 3 hours

[@zhabinsky]

It's been two days since I found your chanel and I am already your biggest fan ever, I am not very good at making compliments and comments, but I could not try to do one. You are the BEST! You are so potive and excited which is very nice, If only a third of my teachers were motived like this I would go to my school with a great will. You are a bright man. :)

[@TheCodingTrain]

So nice to hear, thank you!

[@charlvanniekerk8009]

sorry can we just appreciate that beautiful circle at 2:35 Anyway! I love your channel and cant wait to use it to learn all about java script. Thank you for your beautiful explanation and wonderful videos.

[@ShaneLeeCoding]

It's thanks to you and videos like this that I learned Javascript so quickly.

[@h3x]

the orbital speed should be some function of the distance from the sun. e.g closer to the sun = faster orbital velocity. might make it look more like a real solar system. also, i just bought the book version of nature of code. amazing book! thanks a ton!

[@sevfx]

I love your videos so much. You are just my kind of programmer! In this sketch, you definitively could have picked better names. For example parentBody, childBody instead of planets and planets of planets in a spawnMoons function. That way, it would have been easier for me to keep track of the recursions. But as always, great video :)

[@TheCodingTrain]

those are great suggestions, thank you.

[@rmz1661]

@@TheCodingTrain The function spawnMoons(int) does not exist. I am stuck pleas help

[@collinstump9706]

17:22 "Notice they are all on the X-axis... Y?"

[@gloubiboulgazeblob]

So fun ! The Crazy Locomotive Guy :-D In the spawnMoon function, checking level should be the first thing to do BEFORE any sub-planet creation. This kind of behaviour is typical in recursive things. First check, then do.

[@sergiomendez8852]

No entiendo mucho el ingles, pero me has enseñado mas tu que mi profesor, excelente trabajo!!!

[@sumanpahari8949]

very helpful for my son. thank you

[@brookestephen]

why not use the tree branch and leaf model - the Composite Design Pattern? That way, you can have stars, planets and satellites through-out the data model, but they are simply nodes... the leaves in the model have no satellites. This way you can have stars orbiting stars, and each has planets. You can use the Barycenter model to replace all the satellites and planet, when calculating their cumulative effect on the other planets and star. FYI radius of the orbit and radius of the body are different!

[@simplecastic]

omg i remember you now i was trying to learn processing 4 years ago i loved your tutorial on processing i forgot about that software because at the time i was learning CPP i am going to look at that for sure now

[@Jimanator]

for the size of the "moons" it should have been radius/(level +1) rather than radius/(level *1.2) by making it multiply you give it exponential decay.

[@TheCodingTrain]

+James Butler (Jim) Oops, thank you! Great correction!

[@mannyc6649]

I was about to comment the same thing

[@benholmes3696]

This is Bob Ross reincarnated.

[@fxois3318]

Pointer null exception: "You see, he's just a man !" I wish I had your skills... Really, my work day would then be like 8-9, work, 9-18 screw around, coffee, etc. And no stress !

[@AJMansfield1]

I did a thing like this with processing once. Except I used kepler conics for the large bodies and RK4 integration for smaller asteroids.

[@harutmargaryan9980]

do you have code?

[@ectospasm]

A simulation of Conway's Game of Life for a 10 minute code challenge!

[@TheCodingTrain]

Check out: kzbin.info/www/bejne/qnaxhHZ7hJJ_e8U (would be glad to do this again though in p5.js suggest here: kzbin.info/www/bejne/qnaxhHZ7hJJ_e8U)

[@michaelzermeno2]

wow you make this seem so easy, when I was trying to learn to code I was so lost

[@VLAHECO]

I really enjoy this videos from Mr Daniel... it is not boring :) thank you for sharing

[@TheCodingTrain]

+VLAHECO Thank you, appreciate it!

[@maddo8293]

loved the video . that one direction analogy though got me laugh :) , thank you.

[@endofmysteries]

you make this all so easy to learn and understand! thanks Daniel!

[@TheCodingTrain]

+endofmysteries thank you!

[@suprememaximus7924]

Kepler would not approve of this video hahaha

[@brotherrain1024]

I simply love all your videos. Thank you very much.

[@TheCodingTrain]

+brother rain I'm so glad to hear, thank you!

[@timmorphine]

I think your videos are great and entertaining to watch, but although I understand the language and see what does what, I sometimes fail catching up with the logic of your sketches. Like I'm okay if I repeat after you, but I will have no idea how it all works. I could only wish for a more thorough explanation of the logic, maybe having a diagram or something. From your tutorials I see how but I don't get why (sometimes).

[@IIronGoat69]

24:28 "take a walk" ..man, it's 3am and -3°C outside.. lol, great video btw :D

[@KartikayBagla]

“Show your children! You don’t have any children? Null pointer exception.” - Dan

[@loadingninjavods4648]

x = planets[i].distance*cos(planets[i].angle); y = planets[i].distance*sin(planets[i].angle); translate(x, y); Do that inside the for loop in you draw method and you are good to go^^

[@georgea6205]

Billie joe Armstrong went from being a rockstar to a programmer, is there anything the man can’t do?

[@flinggonza5688]

I am not a coding nerd, but for sine reason I enjoy watching this.

[@charliejulietdavies8715]

i see your "space is a dark, black place" and i raise bones' "Space is disease and danger wrapped in darkness and silence"

[@aleenaselegy]

HAHHA !!! OMG !!! ON 2X SPEED THIS IS THE MOST FUNNIEST REAL LIFE CARTOON I HAVE YET TO SEE!!!XD

[@hazengalilei2643]

SHOW YOURSELF! THEN SHOW YOUR CHILDREN!

[@aryakhanna117]

this is a satisfying application of OO

[@ShaneEngelman]

I wish you were more explicit in your variable names!

[@MrNolimitech]

Great video. But i think, next time you should use Vector.translate and Vector.rotate, instead of using restricted p5 method. It will let other language programmer to use and try it. pushMatrix, popMatrix,, rotate(), translate()... is restricted to high level language like python (numpy.translate). Which is not the case for F#, C#, C++ ....

[@amanmahendroo1784]

considering you have a variable keeping track of its children, say total, you may want each of those children to have floor(random(total/2)) children... the more moons a planet has, the more its probability to have its own children...

[@ekarademir]

If the planets formed around the sun then all of them should be on the same plane, but nice demo.

[@mikejones-vd3fg]

pretend your looking at the sun from a top down view, then they're all on the same plane! :)

[@HDMensur]

svn === sun ? what are you, Roman ?! Anyways, i still love your videos! keep it up!

[@jikojj3680]

No === None of that here

[@MichaelBuergerArt]

I wrote a similar program in p5.js and it wouldn't work when recursion happened for orbiting the planets, when I copied and pasted to processing and fixed up the code, it worked fine. Why is this happening Dan?

[@job2k656]

22:42 - The Vomit Solar System

[@TheCodingTrain]

+job2k6 indeed!

[@mmtf]

7:30 Moons are generally bigger than planets in Processing ;D

[@JkeyKong]

p5.js!!! let me have a rest for my brain!!

[@oFoxo1]

Hello from Italy! Found your channel some days ago and now I'm actually in love with you! You're awesome man! I study computer engineering and your coding challenge are also challenges for me trying to find out what and how you're going to do. In this particular case I'd create a class called like "celestial body" and then classes like "star"-"planet"-"moon" that extended it. what do you think about it?

[@TheCodingTrain]

Great idea!

[@toshb1384]

Would this be easier with inheritance? Maybe you can revisit this challenge with inheritance, I haven't seen you do a video about that yet.

[@gernhartreinholzen4524]

Great Video! Thanks for sharing Bro!

[@i.i]

can you do the same thing with p5 :

[@crochet666]

Can you maybe make something to transform a picture into a grid that people can use as a pattern for crocheting/knitting? I'm trying to make this but I'm stuck with it....

[@fishyperil2153]

ain't no life gonna spawn in that solar system of yours bro ^^ ....just kidding, your book and the videos are awesome

[@smzakirhussain7604]

Like your job!

[@braincoder9055]

Sir you are great

[@parker7454]

Your videos are just awesome, I've learned so much! Could you do some tutorial videos on getting started in Python? Could you suggest any other videos?

[@tranquaLongboard]

I've just discovered this channel but I'm already in love with it, lots of interesting and original projects and your enthusiasm is a perfect mix to get involved people who aren't in the field . I have a question about the vector planets: when I create new planets in the array, the addresses of the new Planet variables are inserted. When the moons are created, a new planets array is created, where the addresses of the new Planet (moon) variables are inserted. How is it possible that the show () method, which runs the array planets, also designs the moons? Printing the planets array {printArray (sun.planets); } in the draw () function I see only the addresses of the planets (how, where and with what criterion the moons are saved, how can I access them, for example, to see their attributes?). Thank you so much for the help and congratulations again for the channel !!!

[@Jjunior130]

I translated this to clojurescript. Behaves identically to video. jjunior130.github.io/coding-challenges/#/solar-system Sketch: github.com/Jjunior130/coding-challenges/blob/master/src/cljs/coding_challenges/solar-system/views.cljs Planet: github.com/Jjunior130/coding-challenges/blob/master/src/cljs/coding_challenges/solar-system/planet.cljs

[@jonmayer]

The sun should be first "Planet". the Planet object should have an optional parent property of type Planet. Everything should have a parent assigned except for the Sun. But I'm only 10 minutes into the video, so I'm not sure if things will change.

[@tristanlee1171]

You should code the circle game by Shea Barton

[@arturfidelus129]

I dunno why, but in your case, you assign value to sun in setup() but not in draw() and it works but if I do that it throws nullpointerexception on sun.show() :/ Had to assign value at the start of the file and it works but I still don't know why it didn't throw anything in your case.

[@angelcaru]

Solar System in Processing - Part N (N+1D)

[@Streicher1993]

is there a library similar to processing for c#?

[@slowdown_]

would really like to know that too. but for now im learning java with processing because i already know c# and its not that hard

[@jikojj3680]

C# is a Java dialect at this level. When it comes to .net stuff or java ee things can be remarkably different but u wont ever need that in processing.

[@skaramicke]

I’d say it’s time to start encouraging data oriented coding for graphics rather than oop, since it’s way easier to optimise for gpus and oop leads beginners down a useless rabbit hole 🕳

[@sebby138]

Hello! What does "for (int i = o; i < planets.length; i ++) " mean?

[@tacodiva7729]

Oh, no children? Null pointer exception

[@michaelmartinez3235]

Amazing

[@firephoenix5556]

No, I am not going outside. It is 11 pm and quite snowy.

[@moshadj]

It's funny to comment on 4 year old videos but gosh I wish you made the orbit speed inversely proportional to the distance.

[@TheCodingTrain]

Doh!

[@redpug5042]

the orbital periods are way off, just saying... right now, they are all circular orbits at different heights but with completely random speeds gravity doesn't agree with your orbits

[@joaago1]

please help, I copyed the code to processing 3.5.4 and it does not work.. Never programed java before only some python.

[@Nulono]

Real planets only orbit in one direction. :)

[@melissaselviani6409]

can you tell me what program you used?? :) Thankyou :)

[@mmtf]

I didn't know processing was java, it really doesn't use the general principal of Java in its libraries.

[@jonnylaw4569]

1:32 I love it lol

[@TileBitan]

love the videos but i dont understand why you include gravity in purple rain and not here lmao

[@Salted_Potato]

Excellent video. Subbing.

[@tomdog132]

Are you able to do this same type solar system demo with atom, p5, and p5js?

[@TheCodingTrain]

Yes, check thecodingtrain.com for a p5 version if it's not there file a github issue!

[@coldsoup753]

How would you draw the orbits and ellipses instead of circles?

[@TheCodingTrain]

+coldsoup753 Do you mean as ellipses? Try varying the radius depending on the angle. You could also do something more sophisticated where you model the physics more accurately.

[@saldme7655]

oow it is amazing!

[@cooldj2552]

is there anything as plug in to add to Unity?

[@mototechvlogsPH]

What softwares do i need to create this?

[@tegirikalbur9705]

No offence but technically planets only spin in the direction the star is spinning, they do not spin counter to the star. Amazing tutorial though.

[@TheCodingTrain]

Thanks for the feedback!

[@oktaybekar319]

isn't it better to give every planet a parent planet?

[@haroldmcbroom7807]

Couldn't follow along. I'm using cs1300 mingw32 :(

[@syruptree]

I would contact you via twitter, but at my school its blocked. I have a Processing program that I have been adding to over the course of several months and would love to share it with you. I was hoping you could give me some advice on optimizing it. You may use the program for anything you would like (even in your youtube videos) the only thing I would prefer is that the code not be released to the public, until I make it more user friendly. Right now there is a lack of sliders, but the keyboard keys are set to work fine (assuming you memorize each keys use) I'll include a diagram of which keys do what and how to use the program. The program is a 3D graph visualizer for fractals and various other objects (ton of real time controlling). Let me know if this would be something you would be interested in taking a look at.

[@TheCodingTrain]

+syruptree Sounds interesting! The best place to discuss code and optimizing is at forum.processing.org. Feel free to link to any posts you make from here!

[@thedankatheist3466]

I made something bery similar to this at school using VB lol. If you want the cade just ask

[@mahbubzaman5013]

Amuzing !

[@fanitram]

hi, how can I make 1 planet have 1 moon?

[@En_theo]

Hi, the link to "Source Code For This Challenge" is no more avalaible

[@TheCodingTrain]

Fixed! thecodingtrain.com/CodingChallenges/007-solarsystemgenerator