much thanks for your answers so far and especially for your helpful code
example Curtis, it will definitely be useful for my JSciVision :-).
Gray scale texture:
Is there a time schedule when to expect the arrival of this new
Portability of shader programming:
Since GLSL (OpenGL Shading Language) is official part of the OpenGL
specification since OpenGL 2.0 and must be implemented by OpenGL
compliant hardware I would think, that it should be portable between
graphics hardware supporting OpenGL. There is an thread on java.net
(http://forums.java.net/jive/thread.jspa?threadID=68578) about this, but
I did not tried myself to run GLSL shader on different platforms myself
yet. Hopefully I can tell a little more in about six month.
That would be very nice :-)