I've been chasing this Rutt-Etra image for a long time...
raster.jpg
It's great to hear you guys are going after it again.
I had the luck of seeing Benton's Rutt-Etra in person in New York
awhile back.
.xX
On Nov 28, 2007, at 11:22 AM, vade wrote:
Here is the code ive used to attempt this myself. It is non
functional, the texture coordinates created for the VBO mesh are not
'useful', in the sense that they do not map to 0 - 1 fro the edges
of the quad, so while I can in fact texture the quad, it only has
one texel mapped.
Ive asked the GL List about this after doing some research. The
usual answer is to use interleaved VBO arrays which render out
vertices, texture coordinates, normals, etc, all within one
interleaved buffer. That is beyond my skill :(
Ive attempted to create a second VBO to "render" out a set of
texture coordinates, bind them before gl_DrawElements, but to no
effect (99.999 percent because I have little clue what I am doing).
Ive also heard the suggestion to use gl_GenCoords, but again, I am
far too novice a GL programmer to fully grok how to use these
suggestions.
Here is my code, hopefully it will not bounce from the list.
http://abstrakt.vade.info/ILOVETHEQCLIST/GLHeightField_Vade.zip
FYIW, I personally know Bill Etra, and have been trying on and off
to get this working for him in a native app - to make a Color 3D
Rutt Etra performance application for him. Ive had a pretty good
version built in Max/MSP/Jitter, but the speed is simply not there.
This VBO method is incredibly fast.
We both would be grateful to have a helping hand with our
difficulties!
Thanks !
On Nov 28, 2007, at 11:57 AM, Alex Drinkwater wrote:
Hi Pierre-Olivier!
Thanks for getting back to me.
On 28 Nov 2007, at 16:32, Pierre-Olivier Latour wrote:
Try the GLSL Grid patch
I know about that one.
What I want is a heightfield grid though (rather than
a static grid), that can be textured, lit etc. by
placing it inside Lighting/GLSL patches, and inputting
a texture image, as well as the displacement image.
The current Heightfield plugin can be placed inside a
Lighting patch, but can't be properly lit, as far as I
can tell. It also doesn't accept an image as a
texture, to be displayed on the surface of the grid.
Cheers,
Alex
On Nov 28, 2007, at 3:20 AM, Alex Drinkwater wrote:
Fingers crossed this will make it to the list this
time. This is my fourth attempt to post this message,
as my mailserver timed out trying to contact the list
server after several hours on each of my previous
attempts.
Does anyone know if it would be possible to modify the
GLHeightfield
plugin so that it produces a mesh that can be used
inside a GLSL patch
in Quartz Composer, or can be textured with an image,
or lit
effectively using the Lighting patch? At the moment,
it seems that the
mesh produced by the plugin does not play well with
other QC patches
(unless I'm missing something basic here). At the
moment I'm not too
bothered with lighting the mesh, but I'd very much
like to be able to
texture it with an image.
I know it's just an example plugin, but it's
tantalisingly close to
what I I's like it to be able to do- just not quite
there.
Anyone any thought?
Cheers,
alx
http://www.toneburst.net
http://machinesdontcare.wordpress.com
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