Teaching myself C so I can build a particle simulation

[@gr4dience]

Hi everyone! Glad to hear you're enjoying the video, it means a lot. I added the source code in the description for those who asked (it's kind of a mess). My semester just ended so I should have some time to work on another graphics project. Let me know what you guys wanna see below! - Cheers

[@simonzanta1403]

heyy, i really enjoyed your video about computer graphics. Im currently researching sources for my Bachelor Thesis from computer graphics and i would like to ask you, if you could share some insights on how you research topics. It would be really helpful, couse i have no idea where to find sources and mainly what to search for.

[@gr4dience]

@@simonzanta1403 Public code repositories were certainly my best friend during this project! If I ever needed inspiration for some feature or felt myself getting stuck, I would do a quick search on KZbin or Google for something similar and that was usually enough to get me through. Another tip is to try breaking down your research into smaller pieces that will be easier to source (ie. "OpenGL instance rendering" as opposed to "OpenGL particles"). Hope that helps!

third

[@vinayakk2745]

hello there, really liked your video! I'm a first year computer science student, I would like to know more about what you do and how you got here, I'd love if you'd upload a video talking about yourself, your work and your journey, it would really help and inspire me! Thank you for this great video!

[@hanya-chan454]

i love the work, why dont u make gravity simulation using nueton's thurd law of motion, i tryied to do it in unity, it kinda works but somehow the particles after attracting to each other and colliding they start to repeal each other (using barn's hut algorithm , no error in my code) , maybe u can do a simulation and explain the optimization method u choose.

[@Nipings]

The editing in this video is incredible

[@njorogekamau3820]

You can achieve the same using an open source python library called manim

[@Rish-h1m]

its the 3blue1brown package

[@jonathan2847]

Engineers make a small number of good KZbin videos then dip back into the void to do their job. This is the good shit.

[@PezzzasWork]

Super cool video! Always funny to see we all encounter the same bugs along the way :D

first

[@thatprogramer]

yeah!

[@SLURPZZZ4461]

hello pezzza i adore your videos. I am in highschool and want to make cool physics simulations and fractal stuff. I know some c++ but struggle with implementing stuff like this. How do you recommend i learn to build real, actual projects?

[@luce_9801]

I know what I'm doing in summer now. Thanks for the inspiration!

[@_Rie_]

me too gonna start college in august so im gonna learn C and make this happen good luck to you too

[@Randomperson-yf2fw]

@@_Rie_Good luck! C is a tough language in the beginning, but it's so satisfying to use once you've conquered the main pitfalls.

[@creo_one]

How did it go?

[@pitiwatkittiwimonchai4656]

me too

[@georgiosdoumas2446]

I have studied physics in 1991-1995, and I had a semester on Fortran in the university. Then at 2004 I learned a little C, and the following years I was slowly reading a few books on C and C++ (mainly I was reading stuff about networks and linux for my jobs) . Since late 2023 I became a junior C++ developer. A few weeks I started learning OpenGL (I can give suggestions to who ever is interested). But I know that I am nowhere near the level to make such simulations! I am so impressed that you are still a university student and can produce those videos!

[@Cassian360]

sugestions please

[@npc386]

i was thinking about to implement opengl into my little javascript particle system (JPS on github) but during that i came across webgpu and i think thats the better choice. but its hard, shader scripting is another level of abstraction...

[@clearlyblotted]

Hey I’d be interested in suggestions to get started! Thank you

[@heheheheheheheeeeeeee]

Skull issue

[@arunkumarsawant6523]

Only know c upto data structures. Want to advance and take up graphics. Provide steps to move forward in c and work on open gl. Turbo C graphics.h is not supported by compiler.

[@samir_buch]

This is super impressive! Casually glossing over the fact that you taught yourself *not just C* but also how to render things with openGL is no small feat. Your in-depth knowledge of particle simulation is also pretty impressive, requiring at the very least knowledge of relatively advanced calculus and physics. And, on top of all of that, this video was very well written and edited. Overall great job, keep it up!

[@samuelcollier1764]

this was an awesome video! C is my favorite programming language and I love seeing graphics programming projects like these :)

[@nano-ai]

this is amazing. i love how you have combined the most notorious subjects like physics and linear algebra and combined them into an amazing program, all in c! absolutely wonderful quality.

[@youknowwhatlol6628]

hello. i am a beginner in all those things and have just found this channel....can't say how grateful I am to you. You, my friend, are an inspiration. You are Knowledge. You are Greatness. You hold the Power. Thank you so much. Thanks. Would like to see more of these simluations, math-physics-chemistry-related programs and such. Thank you.

[@DidIJustDoThat]

I am here with you also a noob

[@GratitudeDueLife]

Same here, I've been wanting to implement programming with the sciences. It'll bring hard but we can do it

[@yourkidelias]

This is a great video, and it is surprisingly well edited! I am not interested at all in physics simulation but the way you explained it really made me start paying attention and it was interesting how you used each optimisation technique to achieve even better results!

[@Arun_Kumar_x86]

this is a great video mate. this video remainds me of sabastian lague's videos. when ever i have thoughts about why i chose programming as a career i think of these kind of videos which boost my happiness and i say to myself that this is why i chose programming as a career to build cool stuffs. thanks mate. Great job !!

[@dylancode]

The new Sebastian Lague! Excellent video!

[@nad.99]

Halfway through this video i feel kms cuz I don’t see myself getting this good anytime soon. Man you’re awesome.

[@kylerchen2385]

naw bruh you can get this good - its possible for any of us. if u wanna build something like this just fuckin believe in urself dawg u can do it. do that, and videos like this produce nothing but inspiration and excitement for your future work :)

[@rideaux8533]

@@kylerchen2385 its not possible for everyone, but we cant know without trying

[@lalpremi]

Thank you for sharing-it's very interesting! I've had the idea of creating a screensaver with a surface-cracking, desert-like effect for quite some time, and this could be an excellent foundation to bring that idea to life. have a great day 🙂

[@HictionaryYT]

Gradience, this video is absolutely astonishing. Putting aside the great editing and video structure, the flow of your story and the way you tell it is both fascinating, and so intriguing. I adore computer science as a whole, and this is possibly one of my all time favorite videos now. What a masterpiece you've made. Subscribed, and hope to see more of what you do! :)

[@avion85]

Good luck for your success on yt. We need more content like this.

[@jahaynes256]

I have had this as a future project in my mind for years. I never went to third dimension due to the fear of linear algebra. This is really impressive and inspirational. Thanks for sharing.

[@Hakkyou1]

Very nice video ! You might want to also look at fluid simulation using particle called Smoothed Particle Hydrodynamics. Basically you replace the collision algorithm with a constraint on the density modulated by a kernel. It sound bad like this but you already did 90% of the work there. Keep up the good work ! See you next video.

[@The_JPo]

I took a graduate level numerical methods course (my prof contributed to some popular CFD software) and it was very cool to see the different algorithms used. Great job !

[@wojciechkalinowski3827]

Very nicely done! I like that you said what you did and kept it rather high level for the video. Whereas, if needed, and if you haven't already, then you can make a more detailed video for the code and maths. Great paste and keep at it!!

[@vasq]

This is pure art. Amazing work bro.

[@kiri9979]

this video is amazing it feels like it's been made by a channel with at least a few hundred thousand subs keep it up !!

[@drakeolejniczak2357]

That was awesome! My favorite part was when you found the linear algebra text and got your change of basis on.

[@QuarzleTheMinecrafter]

Yay another channel with my favourite type of content

[@agaveboy]

that's great c code if you've really just learned it! good job

[@JMW1906]

One more was to implement optimization is to compare the length squared (in handle collision) instead of competing the length. It means you replace a square root call (expensive) with two multiplications (one of the radius is the same), which can even be pre computed once if every sphere has the same radius: x²+y²+z² < 2r²

[@gr4dience]

That was my initial thought as well! The only issue is that to "resolve" the collisions, you still need to push each particle apart by half their separation so you would need to compute the distance regardless. I tried moving the square root function inside that condition but it didn't make too much of a difference :)

[@JMW1906]

@@gr4dience true, haven't thought about the fact that you need the value later. Still interesting though that it makes almost no difference when computed inside the if body. I think that means the grouping into chunks optimization to not check every sphere against every other has a good grid size and already avoids most checks, so most checks have to do the sqrt anyways.

[@stone8684]

dude, you're so incredible. I'd like to see more videos. keep doing them :3

[@htchamber2776]

Channel name + channel banner is literally +1000 aura im gonna steal this

[@ianchaplin2777]

I saw this video on my recommended and I just had to click on it after seeing "Teaching myself C" as I just wanted to see pain but it was more chill then i thought and its good :)

[@aleksaggor]

Mesmerizing! You did a fantasic job with this program and video, keep it up :)

[@humongouswalrus]

Another awesome programmer I have to subscribe xD Great work

[@arthurmac2511]

Now i have another reason to keep studying. You're an inspiration for me :D.

[@Sirepicwin]

I literally just stumbled on this video, amazing and very fun to watch. Made want to actually learn C and take a break from JS for while lol

[@dennischen2922]

This is such an awesome project! Glad to see a fellow NC State student doing cool things!

[@zachzulanas4125]

This is sick! You’ve inspired me to try this haha, just need to find the time

[@bramhuis3571]

This video is amazing! It reminds me of Sebastian Lague’s video’s.

[@Rahim-444]

yea very similar project

[@philipmichel-dv]

really beautiful video . i can now see the importance o mathemetics in programming

[@plvr_strg]

Someone: "You don't need math to be a programmer" Yeah, same as you don't need much strength to hold a sledgehammer... but you need it to wield it.

[@balijosu]

Good metaphor.

[@Smiley01987]

Programming is so much more than using complex equations all the time. It all depends in which field you're in.

[@plvr_strg]

@@Smiley01987 I didn't talk about job positions, I was talking about programming as a mastery in which you can be capable of much more if you know math.

[@salih-khan]

*laughs in web dev

[@flooriiian]

@@plvr_strgYeah thats true, I regret not learning enough Math but i'm relearning it

[@David-ww2sg]

This is so cool :) You've inspired me to want to do something similar

[@serhiiko7141]

this video deserves much more than 2.7 k views

[@evanbarnes9984]

Instantly subscribed! My god this is good.

[@Stylpe]

This is going to be a fantastic springboard for my own physics sim ideas! Starred, will fork when this makes it to the top of my project queue (it's about number 3 I'd say, but full disclosure, it might also never happen 😛)

[@eduardomarinho1482]

Great video and very interesting project, will try to do it on my own. Also, I’m impressed for the quality of the video!

[@hendersonvirtual]

Amazing, can’t wait to see more videos!

[@deadboy9955]

So much of this is reminiscent of physics used in molecular dynamics simulations.

[@space-yg]

Yoooooo amazing video!! I learned so much from it

[@justins7796]

dang you're a legend if you used a physical Linear Algebra textbook to solve your problems. Subbed!

[@the_outer_heaven]

It is very beautiful, thank you.

[@giorgito24]

Absolutely stunning, more videos using C please😮

[@Spencersstory]

Sick good work man. Makes me remember why I chose computer science

[@ticusism]

Awesome! Thanks for sharing your journey.

[@bird5790]

If you are working with grids, the paper "Compact, fast and robust grids for ray tracing" is very worth reading to optimize further

[@gr4dience]

I'll check it out!

[@romeoxxiv]

Very interesting, thank you!

[@sirjersey]

Amazing Video! Definitley learned something new :)

[@ed7590]

Inspiring, makes me want to drop all my JS projects and return to low level.

[@mattywlion5174]

Man it's a fantastic video, it's just great, love this

[@DwellerLord]

This is the best video I've seen all year

[@Green-Code]

Great video! Keep it up!

[@lel7531]

Very cool video, top notch editing

[@lbgonpokeit]

Awesome video, Man I could watch this stuff all day 😅

[@symmetry-e8]

Very cool and informative video. Thanks for the effort.

[@abdala3475]

And here I am, struggling with a simple pyramid c code

[@Pepegalord]

Feel you

[@MasterofBeats]

me fr fr

[@wardingward4884]

Its okay, I'll get harder in arrays, and pointers 💀💀

[@nad.99]

انا

[@nad.99]

@@wardingward4884 linked lists is where I gave up willingly

[@KlojMaalem]

nice and simple representation

[@mohammadalaaelghamry8010]

Great video, thank you for sharing.

[@yoyo3257]

When you realise that math class was not just a class Fantastic good job

[@mathiasensimon]

Cant wait for more videos😊

[@xylh5085]

I definitely wanna give this a shot if I can save up enough for a laptop

[@MarrisaL-bs2ch]

subbed and notified so I can view more of your awesome project.

[@chairlesscrocodile]

Great video!

[@alessandroserra885]

That's simply amazing

[@gabomandam7654]

I just love a good simulation, and even better when it's on C.

[@nothingtobelie]

Thank you for sharing!

[@thewholeworldblurred]

I clicked because of C!

[@uphomes12]

so that face pull in Mario 64 is a masterpiece of my childhood.

[@Gaiuscassius565]

super cool job. Very inspiring i wish i could do something like this

[@dantedellatogna]

Now I want to do this by myself.

[@nadjarman]

Fantastic work!

[@sythatsokmontrey8879]

Dude we have the same story. I spent 2 years building a physic engine because I saw that one video. But mine is in JS. it's terrible. I love it. Great video BTW.

[@moonyl5341]

5:08 an octree is just that but each cube can divide into 8 other cubes so it should be faster

[@ShizoMoses]

Wow. I feel immensely stupid right now. That was amazing.

[@gedaliakoehler6992]

Great video, graphics engine, and physics engine :)

[@charliechimp6917]

Mesmerising

[@Mia-tk7dz]

love the video! good stuff

[@weemanling]

Man, computers and humans are so fucking awesome.

[@megalos2030]

Very good video !

[@danishafzalkhan]

I am a senior software engineer and i am smiling :)

[@benisrood]

Well done, you learned how to actually program!

[@futuremapper_]

Love this!

[@Wannabetolkien]

Amazing Work ! Post more content.❤

[@omarwagmes]

we need the long version of this please

[@aakkii5271]

Great channel potential, subbed

[@_david_548k_6]

I don't understand nothing but this is art

[@shuraosipov]

Good job, man!

[@rgel3762]

Just what I was looking for

[@Raskoll]

Excellent video

[@osalem192]

A new Sebastian Lague! Keep going!

[@elon_mysk3278]

Hey there, Gradience! I have a few questions for you! First off, I'm curious about how you created the particle simulation using Python. Which frameworks or modules did you use? I consider myself pretty advanced in Python, but I've never seen particle simulations implemented with Python before! :D I'm actually in the process of teaching myself C++ with the intention of creating a particle simulation. I believe it would be incredibly useful for my work as a Research Assistant in mechanical engineering! Your video has actually motivated me quite a bit! :D Also, in your pinned comment, you mentioned that your semester just ended. Could you tell me more about what and where you're studying? Looking forward to more content from you!

[@gr4dience]

Hello! For the Python version I used the NumPy and Pyrr packages for math and linear algebra respectively (they both rely on C internally for some operations/speed). Additionally I used PyGame for window/input management and OpenGL (PyOpenGL wrapper) for rendering w/ the GPU. You can certainly get pretty far with Python and it allowed me to prototype very quickly. The fact that you can create an entire HashMap with just 4 characters is truly remarkable. That being said, I wouldn't recommend it for a long-term project because of the poor performance and lack of real infrastructure for something like real-time simulation. I am currently a CS student in North Carolina. Thanks for the support and best of luck on your project!

[@MCroppered]

This is what gets you hired. Fantastic work.

[@jeh_io]

You got my sub sir!