Coding Challenge

[@DonSolaris]

This dude resonates positive energy.

[@za_ozero]

radiates maybe

[@cameron6464]

Truly earns his title of "Bob Ross of programming".

[@aram285]

his new title you just assigned to him.

[@alastairlocke4621]

Which I like

[@KundoKun]

random = happy accidents

[@amogh3275]

"Blob Ross" Sorry i had to

[@АндрейБогданов-о1г]

Love your channel. At first it felt to me as "obnoxious youtuber tries to teach basic programming techniques to people who never tried programming". But later you did such an amazing job with some advanced algorithms like quadtree and some machine learning you've earned a lot of my respect. Keep up the good work, dude!

[@remcodejong2651]

The edits in this video are sooooo good!

[@JonathanChute]

14:20 - you eluded to an interesting challenge. You should create a program that creates a font based off of this noise so that each time you write down the letter "o" for example you'll get one of these subtly off circles that is constantly different, and then extrapolate that to the entire alphabet so when you type in your keyboard you get the computer "handwriting" your sentence. Each letter would look unique, similar to handwriting, whereas fonts each letter is made exactly equal.

[@TheCodingTrain]

Love this idea! You should make it!

[@flameofthephoenix8395]

Well, this would be great in a video game or something like that, you wouldn't be able to use it as easily for messenger apps, of course you could have it to where it has each person see a different variation of the same text, and no one would likely notice.

[@NatetheAceOfficial]

It's dark in the room, quiet. Daniel stirs slightly in his slumber. Suddenly he is sat bolt upright! "Perlin Noise!"

[@markimoop9416]

It's never dark in the room whenever Daniel's around.

[@theromancheezit7982]

lol this sounds like a creation myth

[@marcoronzani7197]

Unbelievable, i needed this kind of thing right now for a project i'm working on, i was going to watch back your asteroids video cause i remember from there something similar, all in all...perfect timing, you are the chosen one!

[@mehdiikbal1244]

Love from France Dan! You are so inspiring and positive. I began coding thanks to you and it was the best thing that could happen to me. Merci beaucoup!!!

[@Cosmoandcracker]

Dude, I am watching your videos for a while now, and i have never seen someone with this kind of sunshine-happyness while coding. Your videos are great! Keep it like this. Awesome work!

[@TechnicJelle]

I just started making an Asteroids game today! Loved the video! Thanks, Dan!

[@DodaGarcia]

Perlin noise is so awesome, I love learning more about it from this channel

[@eideticex]

Never realized this was it's own concept. Used a very similar approach about 6 or 7 years ago to test attenuating light geometry. The renderer I was working on used calculated geometry to represent lights, everything from spheres, cones, toriods to exotic super shapes. After implementing improved perlin noise in HLSL, up to 4 dimensions I was itching to apply it all over the place in the renderer. One of the first things I did was sample noise space at each vertex of the geometry for the lights and passing that into my lighting equations as an attenuation of the radius. Made lights have the familiar imperfection we see in real life and when animated across time, made for very convincing incandescent light sources even though I kept the attenuation so small that the final image showed no more than a delta of 10 in RGB values. Didn't even occur to me while doing that, that I was playing with a rather interesting usage of perlin noise. Then again are there really any non-interesting uses of perlin noise?

[@Unplanted]

Kudos to the subtitler! Great work!

[@NatetheAceOfficial]

The edits were so fun!

[@waynewedge]

Very inspiring. Thank you. Once again, I need to go and program my brains out.

[@ericschneider4919]

This is fantastic. Cyclic noise feels like the kind of thing a lot of people have wanted and I didn’t realize it existed without summing some sort of time-shifted noise function or some other mumbo jumbo. This is a super elegant solution! I’m wondering if circles would be any better than, say, a square in this context. Surely any closed loop would have this property, but intuitively it feels like a circle is the “most random,” even though something like a square is less computationally taxing. Also, it would be interesting to see what would happen if you put multiple shapes in a perlin noise “field” that acted as a displacement map. If you varied each vertex in a shape by the value of the noise at that vertex, i’d imagine you’d get a really cool effect by moving that shape around or varying the field in 3d. Anyways, great video!

[@willb.755]

You channel is always so exciting! Thanks for all the great content over the years.

[@dejoker9042]

Im 0 seconds in to the video and the like button is already pressed. Love your videos!

[@jakehenri9608]

I am so glad you finally did this! I have been wondering about how to fix that blob for over a year now!

[@MahBor]

You're such an amazing teacher. I finally understand what 2D perlin noise means.

[@edwinjones134]

Best teacher on the internet

[@granteadie2616]

you're a national treasure my friend 10/10

[@markuzj.k9445]

As always You made it very clear :).thanks.

[@paulusul]

Perlin noise is always positive That made me really happy :)

[@alex_bc]

EXACTLY the information I was looking for! Thank you so much

[@iamsushi1056]

What an awesome video for inspiration! You could theoretically make a 3d random or self-avoiding walk through spherical coordinates (or a 2d polar random walk) and use that as the coordinates for your perlin noise to be able to just have so many random loops

[@erumabo]

Man, I like emotion you put on this, you got a new subscriber.

[@aram285]

Polar Perlin Loops, part of a balanced developer’s diet. edit: oops I did a mispelliginationating but its fixed now

[@ABaumstumpf]

But he didn't use Perlin noise.

[@ABaumstumpf]

@Manan Karnik No, it is *not*. IN processing and p5js at the very least it returns a fractal noise - that is NOT Perlin noise. Fractal noise is a form of noise generated by adding several different noises together. In case of processing/p5js that becomes apparent when you look at the "NoiseDetail" function: It set the number and falloff for the used noise-layers. Perlin Nosie itself is a very regular grid-based noise with uniform feature size and smooth transitions. Adding several layer of that with decreasing size and amplitude gives the nice rugged result that resembles a terrain.

[@aram285]

@@ABaumstumpf It was a joke k dude. Calm.

[@Dalendrion]

According to the documentation, it's Perlin noise. processing.org/reference/noise_.html It is of course possible that the documentation is wrong. If it is, it's understandable where the confusion comes from.

[@airxperimentboom]

I love this !

[@kenan2386]

How does he have all of that energy Keep up your work!

[@porknwithbill]

I love how human and practical your code is. We don’t have to talk about the semi colons

[@BIG_CLARKY]

This guy has crazy math/science teacher vibes

[@iamjimgroth]

This guy is amazing!

[@listeningcosmos]

Was struggling with this problem, thanks for the solution. Tried this method for my music visualizations and it worked well. Now I think I'll try to improve it by adding a sound reacting component to make it interactive.

[@mujaahidhaywood9843]

I swear Mr Shiffman, you acknowledge every comment. Thanks for another intriguing video.

[@TheCodingTrain]

I do miss a few!

[@drsmek]

I love how I found this video and it actually helped me solve a problem I was working on 😅

[@scalarnomad9330]

This dude is the best!

[@wkool9430]

Great video! You inspired me to make Snake (the game) in JavaScript. The twist is that i am not using any form of grid other than just the loose pixels... It's really close to being done. Thanks again for the inspiring video's

[@slyer7695]

Love from Italy ❤️♥️🇮🇹, #LoveFromItaly5

[@jolly8953]

this channel is a real inspiration for stuff to do lol

[@turnipzoxi2853]

Chaotic good coding.

[@roykepoyke]

That is my favorite video of yours

[@kushagraverma9452]

Nice editing!

[@d_v_d1070]

18:03 in he plays the cards and lures you in with that oneliner, your passion for code ignites "if......the creative possibilities expl...." o yeszz :)

[@Wobbern]

You would be a great teacher! I can tell it on the way you leave the mouse in the middle of the images you want to show.

[@prakharlondhe3876]

he is a *professor*

[@Wobbern]

​@@prakharlondhe3876 and this was a *joke*

[@devi_buns]

Your videos always inspires me ♥

[@JBahrsShiz]

First of all, you rock. Thank you for your videos. As a newbie, I feel overwhelmed, but inspired by your videos. I guess it's like someone learning to play the drums and watching Neal Pert thinking, 'I have a long way to go' and 'man, that's awesome' all at the same time. What is your advice to the noob? I am currently more than half way through the codecademy full stack web development course and plan to finish that, but was curious to hear from the community what "best practices" are recommend for new guys/gals.

[@iwantedtohaveabigytnamepsi2007]

Omg, that's so amazing

[@monochromatech]

Hey I just found your channel and I love it.

[@cielregister8828]

good video Dan!

[@aryamankejriwal5959]

Anyone else remember the debate about whether it was polar noise, perlin noise, polin noise or perlar noise?

[@cellininicholas]

As well as changing the Z-Offset, could you also move the centre of the circle (that is sampling values in 2D perlin noise)? You could also play with that circle in other ways... Maybe use an oval and slowly change it's shape over time?

[@СергейКучерюк]

Great video!

[@hund4440]

You can get a 2d tileable perlin noise texture by cutting a thorus through 3d perlin noise

[@pdutube]

The segment at 16:34 looks like the continent of Antarctica is morphing with Earth's rotation. Trippy. Another cool way to implement 3+ dimensions is to make the extra dimensions color based or sound based. Then a rotation/translation/etc., would change colors and sounds.

[@TheCodingTrain]

Please try this!

[@aaronrothwell7615]

This is a really fun one to add alpha clearing to, so you get blurred lines as the shape morphs. So instead of background(0) you would use color(0,0,0,25); rect(0,0,width,height); and this will draw a rectangle over the entire screen that is slightly faded out and because these are layered on top of each other each previous generation of line is more blurred out and so slowly transitions to black. Hopefully this makes sense, not sure how to format code in comments.

[@azomtech4852]

wonderful wonderful wonderful wonderful wonderful wonderful wonderful wonderful wonderful wonderful wonderful wonderful

[@Confuseddave]

I was thinking about whether you could make a seamless 2-dimensional texture (there was a video were you used Perlin noise to create a vector field and had particles flow through it, but it had artefacts at the edges where the vector directions would change abruptly). My first thought was to use the surface of a 3D torus to give a looping 2d texture in the same way you're using the edge of a 2D circle to generate cyclic 1D noise here. Then I twigged that the would cause distortion in the texture, since the outer edges of the Torus would sweep through a larger length of the noise pattern than the inner surface for the same angle. You could minimise it by turning the minor circle so it's tangent to the major circle rather than radial (so your torus would be flattened as if you sucked all the air out of it) but it'd still have a slight distortion to it unless you actually projected the circle onto the surface of a cylinder (sounds complicated, but probably just needs the coordinate calculations to come in the right order). Part of me wonders if it would be simpler just to write a Perlin noise class that interpolates smoothly between the edges, but that would limit the scale of the noise to integer fractions of the screen space, and might cause issues if you wanted to create images with odd aspect ratios.

[@DustinGunnells]

I don't know what you found here, but I'm still studying it. I think you found something extremely important on accident. That phase thing is incredible!

[@JNCressey]

As the phase changes, the orbit of (cos(A+phase), sin(A)) over A morphs as follows: Phase=0: counterclockwise circle Phase=pi/2: oscillating along the straight line between (1,-1) and (-1,1) Phase=pi: clockwise circle Phase=3pi/2: oscillating along the straight line between (-1, -1) and (1,1) And between those, it is various elliptical shapes.

[@diligar]

What if, when moving through 3D Perlin space, instead of looking at circles in x,y with increasing z, you looked at circular cross-sections of a torus? Then it’d definitely loop :D

[@KnakuanaRka]

Okay, the gag at 6:02 is hilarious. ¯\_(ツ)_/¯

[@WildAnimalChannel]

I use 3d fractal noise to make mountains on the 2D surface of planets in my game I'm making. You're giving away my secrets!

[@jazonjiao638]

Awesome! Finally fixed the broken blobby!

[@elyaizen]

Wow Dan. 👏

[@EliKennedy]

This is crazy. Last week i coded a wobbling blob of space jelly in a perlin noise loop for my space shooter and mine DOES have this visual artefact. Now I can fix it

[@poplikes]

brilliant!

[@johnterpack3940]

It looks like the perfect technique for modeling a realistic planet. Just apply the exact same technique to spherical coordinates instead of polar coordinates. Maybe add a couple octaves of additional noise or an underlying sine wave pattern to help create larger scale areas like continents. At any rate, it certainly gives me a better idea of where to start than anything else I've found. Thank you.

[@КлипыипесниНОВИНКИ]

Супер. Вы крутой!

[@kreuznachpham1208]

Amazing. Thank you so much

[@pinkierar_real]

Потрясающе

[@vadsavin]

Do you remember your Perlin noise example with moving particles? Please, try to make the same staff but let particles move like drawing contours of input image.

[@hendasheng]

thank you for your help:)

[@topa9487]

*give me the polar perlin noise LÖÖPS brother*

[@pluffcrock3438]

21:35 that shooting sound resonates in my nose

[@JackLaidlaw]

Wonderful

[@monlewi1976]

Perfect spin loader

[@kautukkundan8001]

Just amazing

[@abdelrhmandameen2215]

I’m here for the hands gestures.

[@creature_of_fur]

During your explanation I had another idea. What if we take 1D perlin noise, then take the end points, draw a line between them, and then shear the entire graph, so the line stays perfectly flat. Essentially, when we take the noise value, we subtract some amount from it. That amount ranges from the start point value at t=0 and the end point value at t=1. Just simulating it in my brain, I don't think it would be noticeable

[@SaifUlIslam-db1nu]

Is there any possible chance you can arrange to teach professors and teachers how to make animations like this? Your graphics really help to understand Mathematics and Physics. I think it would help quite a lot in the class room!

[@deadend8111]

Nice video!! I challenge you to make a drawing predictor (simple neural network that calculates the next points locations from few starting points)

[@execskies4245]

Now I want to see rolling Perlin noise

[@darkfrei2]

Can you explain how to code the *map* and *noise* functions?

[@VictorNascimentoo]

Do a next challenge on Hilbert Curves and other space filling curves :)

[@mahirdaiyansafwaan2148]

Awesome

[@AuraVFX]

how do you make the noise loop follow a certain shape like the heart you showed in the start

[@Mortagus]

Wiggle wiggle wiggle 😛

[@DotNetRussell]

This would be cool to use to generate random terrain

[@TheCodingTrain]

See: kzbin.info/www/bejne/f3ylYpuNjMqXg80

[@JonDavies-Shiftbulk]

Continuously good videos. Can you do one with the polar noise mapping seamlessly to a sphere. it is tricky as you change the radius the polar mapping the noise texture distorts.

[@TheCodingTrain]

Oh I would love to try this!

[@praveshgaire3437]

Never though noise would be that useful

[@Seb135-e1i]

So. You use one noise loop to make sure that the circle is perfectly closed. At the end you also introduced the possibility of a z-offset. Could you use 4 dimensional perlin noise, use dimensions 1 and 2 for the perfectly closed circle, and move around dimensions 3 and 4 in another circle with a z-offset and w-offset so that it creates a perfectly looping animation?

[@juschu85]

12:48 No, you couldn't just split up a into two different variables and increment them in another way. Then you wouldn't end up at the point where you started in the 2-dimensional perlin noise space. Or I just misunderstood what you said you could do.

[@mastermezorno1593]

The mister rogers of computer science.

[@anthonytonev1357]

Welcome back to Polar Perlin Noise Loop Thing of a Blob

[@ABaumstumpf]

I have said this on several of your other videos - but this is *NOT* perlin noise. Processing, p5js and several others might call it that, but this is a form of fractal noise - several layers of smooth noise of different frequencies added on top of each other. Also - Perlin noise is inherently closed. If you set the correct scale you automatically get your desired perfect closing loop. This also works for creating 2D perlin noise and making it tileable.

[@TheCodingTrain]

Thanks for the feedback! From what I understand, the implementation in Processing is "classic Perlin noise" from 1983. I agree that I could be better about being clear about this. Actually I'd love to make a video that shows the differences between this classic "VALUE" (?) method vs Simplex vs Perlin. It would be wonderful to have a Processing library with these different implementations. Maybe this can be a Coding Train project!

[@ABaumstumpf]

@@TheCodingTrain " From what I understand, the implementation in Processing is "classic Perlin noise" from 1983." the noise-function of processing is giving you a fractal noise. It might very well be using a form of Perlin-noise internally to generate the octaves, but what you get is certainly no longer Perlin.

[@orpheus0108]

that's how perlin noise works💁‍♂️

[@ahmedsharif9193]

Actually, negative values for xoff & yoff are supported in the p5 Perkins noise function

[@jedmarshall217]

What if you moved where you were getting your perlin noise valises from, instead of moving around the circle? Say, having the circle trace around another circle in the perlin plain? Seems like this might be a cool way to add some more “randomness” to the space without having repeats before the end.

[@georhodiumgeo9827]

Did he just project 3D, 2D perlin noise into a 1D line projected onto a 2D picture taken into the third dimension! I am happy this didn’t cause the universe to explode but I don’t know how much more of this it can take!

[@inusahrauf1810]

very good video

[@inusahrauf1810]

Please how do i build my own live video streaming website in my shared hosting Cpanel?