Voronoia 2

Just a quick test of a simple voronoi pattern generator. Nothing ground-breaking, just thought I’d try it in QC.

Incidentally, I’ve messed around with a voronoi shader in the past. This is a different method, and is a bit of a cheat. Essentially, all you do is create a load of cones, at random positions, pointy end pointing out at you. the lines where the cones intersect define the edge of each cell. In this case, I’ve mapped a gradient onto the cone (which is actually a cylinder primitive, with the top diameter set to 0), for tonal variation.

The only problem with this method is that the perspective effect distorts the pattern.

Adaptive Tiling

It’s a lonnnnnnng time since I did anything in QC, so I thought I’d try and keep my hand in a bit, by doing something really simple.

As usual, it didn’t turn out to do quite as simple as I thought it would, in the end, but it looks very simple

It’s basically just a 2D tiling effect, but works iteratively, so brighter areas of the image are subdivided into small tiles.

Uses a JavaScript loop inside a Core Image Kernel. I don’t know what the latest state-of-play is with JavaScript in CIFilter patches. There used to be memory leaks. Dunno if this is still the case.

Coordinate-Spaces

It turns out the internal coordinate-systems of some of the Quartz Composer geometric primitive patches are orientated in different directions. These two primitives have the X and Y coordinates of their vertices scales along the Z axis in model-space using a very simple GLSL Vertex Shader, but one appears to be rotated at 90deg. to the other along the X-axis. Odd.

Toneburst In The Wild

I’ve been doing some work over the past year or so for Nicky Smith, AKA wierdcore, who, among many other things, is in charge of visuals for Aphex Twin’s live shows. Here’s some examples of some of my QC work in use.

Note: not all the QC work in these clips with carried out by me. You might recognise a few things from earlier posts here though.

Gray-Scott Reaction-Diffusion Test

Test of Gray-Scott reaction-diffusion pattern generator, implemented in a Core Image Filter kernel in Quartz Composer.

This version is much more controllable than my previous RD experiments, but still capable of producing some interesting patterns.

I’m planning to add some more performance-orientated controls for warping and realtime editing, also for seeding the effect with live input image and/or adding masks so that different patterns can be generated in different areas. None of which is particularly original (there are examples or similar setups all over YouTube), but I’ve not seem it done in QC before.

VasaRiley Belated Release

I’ve been tied up with other things lately, but finally got around to releasing the VasaRiley qcFX for VDMX I made for Weirdcore last year. I’d hoped to find time to do a quick demo video, and put together some documentation of the controls (since it’s quite complex), but haven’t had time, with other projects etc., unfortunately.

‘tb_VasaRiley_1.0.qtz’ in the Box.net widget, anyway.

Reaction-Diffusion Shader Interesting Errors

I’ve been getting some interesting results with a Reaction-Diffusion shader. It’s definitely not setup in the way it should be yet, but has produced some interesting images nonetheless. The stills are a bit misleading, as in motion, the effect is very hard to watch at the moment, as it flickers horribly.

This is based on a GLSL port of Sanch’s HLSL shader for vvvv, posted on the vvvv website, so all credit goes to him.
It’s hug fun to play with, though the results I’m getting look very different from the screenshots on his (still amazing) website.

Beautiful Mechanical Waveforms

Video quality isn’t great, but fascinating, nonetheless.

Nothing to do with me, I might add. Just spotted it on YouTube.

Flash, But Nice

This Perlin Noise Vector Flow-Field visualisation is nice.

RGB Feedback

Feedback with slightly different values for RGB channels.