BIT-101 [2017-2023]

Curl Noise, Demystified

Jul 16, 2021
[ noise , noise-series ]

In my recent post on mapping Perlin noise to angles, I was put on to the subject of Curl noise, which I thought I understood, but did not. I figured out what Curl noise really was in a subsequent post and then posted my earlier incorrect (but still interesting and perhaps useful) concept of Curl noise in yet another post. Although I kind of understood what Curl noise was at that point, I wanted to give myself a more complete understanding, which I usually do by digging into the code, making sure I understand every line 100% and seeing what else I can do with it, trying to make multiple visualizations with it to test my understanding, etc.

Perlin Noise Quad Tree

Jul 15, 2021
[ noise , noise-series ]

Sometimes I like to take two random concepts and smash them together.

Not Curl Noise

Jul 15, 2021
[ noise , noise-series ]

I previously had an incorrect concept of what curl noise was. This experiment demonstrates it. Although it isn’t what I thought it was, it’s still a pretty cool concept.

Curl Noise

Jul 14, 2021
[ noise , noise-series ]

My last post on Perlin noise wound up on hitting Hacker News, which generated an enormous amount of views, and a fair number of comments – here, on Twitter, and on HN itself. Of course, there was the usual eye-rolling, condescending, “why doesn’t he just do ….? that would be the obvious approach” kind of comments there, but a fair amount of actual helpful ideas, explanations, and links. One thing that came up over and over was the idea of using curl noise. So, when I got a chance, I went ahead and used curl noise.

Mapping Perlin Noise to Angles

Jul 11, 2021
[ noise , noise-series ]

A common use case for Perlin Noise is to create some kind of flow field, and a common way to do that is to map the noise value at a particular location to an angle from 0 to PI * 2 radians (0-360 degrees). Above you can see an example of this. But there’s a problem with this logic. Can you see it in the above image?

Isometric 3D Perlin Noise

Jul 10, 2021
[ noise ]

Similar to one I did recently, but implemented with isometric cubes.

Pillar of Noise

Jul 9, 2021
[ noise ]

I could not be happier about the way this turned out. I could play with this for hours. Which is to say, I’ve been playing with this for hours.

7 Days of Code : July ’21 : 07. Divide

Jul 7, 2021

Note: 7daysofcode.art is no longer alive.

I spent WAAAAAAAY too long on this last weekend. I was possessed. It was fun. The code is hideous. Microcomps? Too bad they don’t do anything. Would be fun to build this out a bit. Clean up the code and modularize things, get them animated and maybe some bit of interactivity. But I doubt I’ll be doing that any time soon.

Canvas Filters and Particles

Jul 6, 2021

I have to admit, after yesterday’s excitement over discovering Canvas filters, and after digging into them a bit to write the last couple of posts about them, I was somewhat underwhelmed. They didn’t seem as exciting as I initially thought they would be. But had another go with them today, and now I am a believer.

7 Days of Code : July ’21 : 06. Distort

Jul 6, 2021
[ noise ]

Note: 7daysofcode.art is no longer alive.

This algorithm is painfully slow, but if kept to small areas it’s pretty neat.

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