Видео

Thanks! I'm using Processing. Yes, it has a very solid library of graphics functions built in. I'm programming in Java, but Javascript and Python are also options in the same environment. It's free to down load from processing.org and takes about 3 minutes to get running - basically download and unzip.

I'm glad it was helpful. I realize it's not the quad-trees you were asking for a while back, but it should be useful for a lot of applications - and simpler to understand.

Thanks! I'm glad you found it interesting.

Not currently. It can all be copied from the video though. I should be able to send a copy if you want it.

Thanks! Glad you enjoyed.

Thanks! I'm glad you found it helpful.

Thanks! I'm very glad you enjoyed.

Good idea! That could lead to some kind of a game where on-line players can swap seeds.

@@programmingchaos8957 then i would include other attributes of the plants too like how much sun light it needs, how fast it grows, is it making a fruit, or the way it reproduces, etc..

Thanks for letting me know. With that many particles it definitely kicks into high gear occasionally. I'll have to play with the audio in future videos to see if I can filter it out.

I'm glad you're enjoying them! I already go through all of the typing segments and up them to around 3x speed (and edit out all of the backtracking and retyping, I can't really type that accurately). I wonder if I should speed those pieces up even more.

@programmingchaos8957 Honestly I think it's fine how you have it, the pacing seems appropriate and followable. I'm just referring to how watching at 2x speed brings me back to the days of being in your classes, haha. (I do much of my YT watching at 2x)

Crud. Thanks for pointing that out. It was recorded in 1080p. For some reason my editor shrank it - my fault for not keeping an eye on the default scale as I did the editing.

@@programmingchaos8957 It makes no difference, no worries everything is perfectly well visible and legible.

Good to know. But still annoying on my end. I'm trying to put out good content and these (minor) issues are frustrating. I do appreciate your pointing it out so I can try to fix it in the future.

@@programmingchaos8957 wouldn't have noticed if not for youtube shite codec

I'm thrilled to hear it! If you want feel free to post info about the project.

@@programmingchaos8957 im working on an idle game in rust with the bevy engine, and the concept is that you have many different ants crawling around doing various tasks. Eventually I'm hoping for some emergent, factory-design type mechanics where the ants do all the work. For now, its just a bunch of particles moving around though. I'm no rust or bevy expert, so its been a great learning experience, but equally as daunting

Sounds like a very cool game. I've never understood the appeal of idle games, while also spending hours and hours watching multi-agent simulations that are basically idle games without the scoring :) So, this sounds like a very clever approach.

@@programmingchaos8957 they itch my brain the right way. I've wanted to make one since I was a kid. I'm really hoping this project works out for me

Best of luck then!

Thank you! I hadn't heard of primordial particles systems before, so thanks for sharing. When you get your system working feel free to share a link, I'd love to see it.

Good Job! I hope you enjoyed the video too :)

Thanks! 😁I'm glad you enjoyed it.

I'm glad you enjoyed it! Chaotic systems are one of my favorites - not a big surprise given the channel name :)

@@programmingchaos8957 In the process of making a 3d Rossler attractor!, your work has inspired me.

Welcome! I'm glad you enjoyed the video. I love 'ChaosCommunity', I don't think anyone has used that phrase before - mind if I 'steal' it? I like Processing for these videos because it's easy to install and has easy to access graphics capabilities, so has a very low bar to entry for newer programmers (and more experienced programmers can translate the algorithms to the language of their choice). My standard language is C++, but that's not as good for simple, graphical projects. Of course, p5.js has the exact same advantages as Processing with Java, I've just used the Java version a lot more so am more comfortable with it. But I have been thinking of doing some future videos in p5.js. Just need to brush up on the syntax differences.

@@programmingchaos8957 I'd love for you to steal that name! Okay I was just wondering about it for my own work. I'd also be open to working on p5.js if you decide to do those videos. Thanks again!

You're very welcome! I'm glad it was useful.

That's an excellent question. With the algorithm in the video movement tends to 'dampen out' whereas sidewinders maintain a fairly strong curve over their whole body. Watching some videos of them it looks like maybe all of their body 'segments' move through the same spaces/curves. So, something more like a traditional snake game snake, but with the head moving in sin() wave might be a good starting point. It's also possible that someone has already figured out the algorithm and posted it, but if so, I haven't seen it. If you make any progress on this, I'd love to hear about it.

@@programmingchaos8957 For me it looks like it is stepping with its head, or neck. Based on its trail i can see that there are always two contact points to it with the ground. This reminds me of a cork screw that is rolling with its tip that is like the snake's head region, or rather the neck of it because it keeps its head away from the ground. Also the trail of it looks like the tangent function a littlebit

Good observations. The bit about looking like a corkscrew might be a clue as to how to model it. The whole body shaped roughly like a corkscrew, but with each section progressing through the curve.

@@programmingchaos8957 Humanoid things have their feet on the ground while they are stepping too. I can imagine the place where the snake puts its neck to the first time as a humanoid foot step. Basically the segments must go through that first footprint first, and then towards the neck of the snake. After that spot there is a straight part on which the snake "stands", and then a turn which is the last stationary place of the snake's step. Each snake step consists of two turns, and a straight part, that is two stationary points Everything after that has to go through these stationary points before it can go towards the snake's head, but also only these segments are not touching the ground so these are the suspectible to curve when the snake turns. After that there are going to be two additional points where the snake "stands" with its tail part like a leg behind. These two points are also stationary. So i would place a point where the snake puts its neck not its head first, and then make an additional point at a certain distance from the first, at a certain angle compared to the direction the snake went when its neck step "touched" the ground, and then pull everything through these two points first. I would also make sure that the snake does exactly two steps before it "runs out" by tuning its initial two points' distance, and the snake's length.

Thanks! For a long time, I had thought the inverse kinematics was a lot more complicated than it is (at least the simpler algorithms) so I was glad to get the word out. :)

Not currently. I might set one up eventually, but for now all of the code is in the video. Not as easy as downloading from a repo, but the teacher in me thinks copying it is a good way to see the nuances in the code. These days a large language model like ChatGPT can probably generate most of the code if your specific with it - code in processing for a CCD inverse kinematic model - especially if you give it the segment class to start from. I'm not a huge believer in LLM code, but for well defined problems it can save some typing.

Thank you! FABRIK is also pretty cool. I want to code that next and compare them. I might do a video on FABRIK as well, thanks for the suggestion.

That's a great suggestion, I'll have to check it out.

I managed to totally miss Devs, I'll have to check it out. But there's a good chance they used the same (or a similar) IK algorithm in the show.

I'm glad it was helpful!

You're welcome! I'm glad is was a useful tutorial. I found this approach easier than I expected. A PID video is a great suggestion. I'll have to look for some applications that do a good job of illustrating the process graphically. I think of them as for problems like temperature control, but I know there are more visually interesting applications. Let me know if you know of any.

Thanks! I was surprised at how (relatively) simple and effective this algorithm was for generating smooth movements.

Hi Zach! I had a great time at the game jam kick-off, thanks for the invite. It's always fun giving presentations like that. I still need to check out the games you guys developed. I'm guessing there were some pretty impressive ones, based on the attendees.

Thank you! For my undergraduate degree I studied physics and did a fair amount of computer modeling as part of the degree - but that was also long enough ago the CS programs were not very common. I got an MS in physics as well, before finally figuring out that I really only liked the programming models part of physics, and switched to CS for my PhD. Of the 'traditional' fields I would recommend CS with a math or physics minor. But these days it might be possible to find something like a mathematical modeling program. Hope this helps.

@@programmingchaos8957 thank you!

Thanks! I'm always trying to learn new techniques myself. If you have any suggestions for future topics I'd love to hear them.

Thank you!

I'm glad it was helpful. Creating a text based version with a bash script is a great idea. It's one of the the things I love about computer science/programmers, all of the cool ideas for how to apply things in ways I never would have thought of.

Thanks!

Thank you, but I'm afraid I haven't used the COMSOL package at all, so I don't know what commands would work. As a finite element modeler COMSOL should be able to mimic the results. I think you would need to define two 'chemicals' in each cell in the model and then implement the same equations as are presented in the video. The parameter choice is up to you. The tail end of the video shows several different outcomes with different parameter choices. Keep in mind that the initial conditions can also make a difference.

@@programmingchaos8957 what will be the Allen Cahn equation for weak form of PDE for 2D and 3D?

Thank you! That totally made my day!

Great idea! Let me know how it turns out.

Thanks for the comment. I've found that I'm often introduced to some feature of a language or programming technique and think why would I bother learning that? And then six months later I stumble upon the problem it's designed to help with. So, I do try, at least sometimes, to introduce the issue first.

That's a big topic, as there are quite things you can do with classes that you can't with just a type. Being able to define function members of a class is a big difference. In addition in a class you can make some of the data members and/or function members private (or protected). Private members can only be accessed from 'within' the class. This is most commonly used to protect the data members so that they can only be changed using the public functions of the class. For example, this can be used so you can't accidently make the denominator data member in a fraction class zero. There's also inheritance and polymorphism, which allows you to create variations of classes that have similar features. For example, sets of classes that all share the same print function so they can be used partially interchangeably. I realize that probably doesn't make much sense, but the full capabilities of classes usually take a couple of chapters to explain.

@@programmingchaos8957 Thank you very much

Thanks! I've always been intrigued by diffusion limited aggregation, because it has a lot of very cool applications, at least for procedural art.

I'm glad it was helpful. You're very welcome.

You’re welcome. I’m glad it was helpful. Which graphics library do you use with Python? I’ve played with Godot a little bit, but mostly use Unity for game development.

@@programmingchaos8957 I use a mod in the Processing program, it's called "Python Mode for Processing", by Jonathan Feinberg

I should have guessed :) I've used the Python version myself a little bit, but I'm so used to Java in the Processing environment that when I switch languages in Processing I make all sorts of mistakes. It's like I need to use a different IDE for each language so my brain knows what language I'm using.

I’m thrilled to hear it was so useful. Constraint satisfaction has been around for a long time, but I haven’t seen applied to procedural generation much either. I’m not sure why, maybe it’s just viewed as too old to be applicable (?)

@@programmingchaos8957 probably, it also took some time to generate and most of the procedural generation these days just uses noise and calls it a day. There has been a small rise in popularity of wave function collapse for procedural generation, who knows maybe this will also pop out.

Thanks! I'm glad you enjoyed the video.

I’m really glad you enjoyed it. Happy programming.

Thanks! I’d like to make a mobile version, but I don’t see a good way to handle the programming portion.

That’s a great idea! It should give really interesting results depending on the length of the creatures.

Hi. This is a pretty well known technique that's been around for quite a while. I thought having a version that stepped though the programming could be useful for some viewers. To be clear almost none of the algorithms I present (or that are in most RUclips videos) are completely original. For example, my previous video was on genetic algorithms, which go back at least to John Holland's work in the 1970's. I'm just trying to present algorithms in a way that is helpful to the viewers. I have to say that argonaut's video is very impressive, and possibly does a better job of illustrating the idea than my own - thanks for pointing it out.

I watched several videos, and read a couple of blog posts, before putting this together. But you one of them was argonaut's video - good spotting. Of the techniques I looked at this one seemed the simplest to code.