After finding out that the vanilla fisheye shader for some inexplicable

reason does not work here, I set out to learn glsl. In process of doing so,

I stumbled across Libero Spagnolini's cool PhotoBooth demystified website

which has greatly helped me facilitate learning more about shader language.

As a result, I am sharing this collection of semi-useful shaders, some of

which mimic PhotoBooth behavior (Mac users already have jit.gl.imageunit

object to access those, so they will likely be more useful for Windows

users), other that are reproducible using jitter tricks (although in the

case of a dedicated GPU with hw shaders, this implementation should

theoretically offload computing to the GPU), and finally a few that are

FWIW, I think the greatest value (apart from the working fisheye shader ;-)

comes from the fact that algorithms are self-contained, terse, and have

adequate (albeit not necessarily consistent) comments, all of which will

hopefully facilitate learning of shaders. That being said, there are some

cool effects that can be created using extreme values, so make sure to mess

OK, enough of ranting, you can get "shaders ahoy!" from the following URL:

http://ico.bukvic.net/Max/shaders_ahoy-1.0.zip

NB: not all filters take both values, so if you see no difference while

scratching one of the input Max number boxes, that is probably why.

Composition, Music Technology, CCTAD, CHCI

http://www.music.vt.edu/people/faculty/bukvic/

After finding out that the vanilla fisheye shader for some inexplicable
reason does not work here, I set out to learn glsl. In process of doing so,
I stumbled across Libero Spagnolini's cool PhotoBooth demystified website
which has greatly helped me facilitate learning more about shader language.

As a result, I am sharing this collection of semi-useful shaders, some of
which mimic PhotoBooth behavior (Mac users already have jit.gl.imageunit
object to access those, so they will likely be more useful for Windows
users), other that are reproducible using jitter tricks (although in the
case of a dedicated GPU with hw shaders, this implementation should
theoretically offload computing to the GPU), and finally a few that are
likely less common.

FWIW, I think the greatest value (apart from the working fisheye shader ;-)
comes from the fact that algorithms are self-contained, terse, and have
adequate (albeit not necessarily consistent) comments, all of which will
hopefully facilitate learning of shaders. That being said, there are some
cool effects that can be created using extreme values, so make sure to mess
with input values...

http://ico.bukvic.net/Max/shaders_ahoy-1.0.zip (a measly 17K)

NB: not all filters take both values, so if you see no difference while
scratching one of the input Max number boxes, that is probably why.

Ivica Ico Bukvic, D.M.A.
Composition, Music Technology, CCTAD, CHCI
Virginia Tech
Dept. of Music - 0240
Blacksburg, VA 24061
(540) 231-1137
(540) 231-5034 (fax)
ico@vt.edu
http://www.music.vt.edu/people/faculty/bukvic/
http://ico.bukvic.net


shaders ahoy! study v.1.0 now available