On 20/05/12 16:15, Kassen wrote:
On Sun, May 20, 2012 at 04:23:33PM +0200, roger pibernat wrote:
oh, thanks a lot, Kas.
This I don't know about, it's not something I think I heard of in the
Fluxus context. For filtering and so on we do support GL shaders.
All I know is it's listed on the FreeFrame host apps listing:
http://community.freeframe.org/hostdatabase
Then most likely that is right and I was wrong :-)
It is a bit odd that I hadn't heard of it though.
Looks like there's some code built in, but I've personally not tried it
(also I'm not sure if it works on 64bit, the freeframe spec seems 32bit):
http://git.savannah.gnu.org/cgit/fluxus.git/tree/modules/fluxus-engine/src/FFGLFunctions.cpp?h=master
I'm not sure I understand what you're suggesting. Would that be writing
the output to a texture and then mapping it to the surface of a plane
rendered at full screen? Are you saying I may have access to the texture
pixels? If so that would work for me, I guess. I don't need much
precision, rather the opposite, because all I want is to add glitches to
the images.
Yes, that is exactly what I was suggesting. Textures you can treat as
just as set of pixels as well as link a renderer to them. The one
downside to this and why I wonder whether this will suit your needs is
that it is slow to do stuff per-pixel, per-frame and this will
probably be a serious bottleneck if you'd like to do this full-screen
in realtime.
Maybe a shader could work for adding glitches, instead of this whole
"plane+ texture+ tricks" stuff. Shaders have their own little language
and I think they require reading a bit about OpenGL and so on, but if
it would work it would be a LOT faster.
Yes if you have a recent (last 2-3 years) GPU you can probably
manipulate HD video in real time with fragment shaders, depending of
course on how complicated your processing is.
(
semi-off-topic, not fluxus, but opengl glsl shaders: these experiments
from early this year were definitely not realtime even with a fast GPU:
http://claudiusmaximus.goto10.org/g/pencil-filter/
)
too bad fluxus is not the 'right' tool for that anyways, I was just getting
into it and I really like it. But I'll be using it for other stuff for sure
Lovely; welcome on board!
Yours,
Kas.
Claude
