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Tools: QuartzComposer, CoreImage Filter
After my first steps with Pixel Bender I saw, that Shaders aren't that complicated and I wanted to try out GLSL for writing an image kernel for Quartz Composer.
I stumbled upon Petri Leskinen's blog (http://pixelero.wordpress.com) and a very cool metaballs demo he did with pixelbender. I tried to port this to GLSL and here ist the result.
Meanwhile the image kernel developed into a parametrised Quartz Patch that I use in VDMX as a image source. It looks very nice when thle blobs move to the sound. In the right video you can also see what happens if you skip the Blinn-Phong Shading and use an animated texture instead.