[openvrml-develop] Re: Transparency

[Greg R. <ne...@po...>]

Tom Flynn <tf...@us...> wrote:

> Damian McGuckin wrote:

> >This has been open for over a year.  I'd like to close it.
> >
> >There are two issues with transparency, one associated with materials and
> >one with images that have transparent parts.  Apparently neither work.
> >
> ><snip>
> >
> >Heaven only knows what to do with Material transparency.
> >
> >Can anybody direct me to where there are some simple files to try this
> >out?  And/or any theory that might be useful especially in the context of
> >OpenVRML and its usage in the context of OpenGL.
> >

> There are a couple of simple transparency examples available with the 
> NIST Test Suite at 
> http://xsun.sdct.itl.nist.gov/~mkass/vts/html/vrml.html . Unfortunately 
> I don't have a pointer to which tests would be of interest though ... 
> I'll try and post some URLs after I get back home from holidays next week

I believe I've got a fairly complete set of possible transparency combos
here:

	http://www.libpng.org/pub/png/pngvrml.html

(specifically, http://www.libpng.org/pub/png/pngvrml/pngboxes.wrl, but
the link above has screenshots of how each major section _should_ look,
except that some of the transparent holes are too small to discern.)

Also, all of the textures are included on this page as standard HTML images:

	http://www.libpng.org/pub/png/png-textures.html

The holes are more visible here.

Greg

-- 
Greg Roelofs            ne...@po...             http://pobox.com/~newt/
Newtware, PNG Group, Info-ZIP, AlphaWorld Map, Philips Semiconductors, ...