[Public WebGL] Vetex shader texture lookups

John Davis [email protected]
Mon May 16 20:30:36 PDT 2011


Try it again in Chrome, should work now.  For some reason the facebook link
threw an exception on my desktop, but not my laptop (where I develop)..

On Mon, May 16, 2011 at 11:50 AM, <[email protected]> wrote:

>
> Yeah - to be 100% clear on this:  There is hardware out there that is
> supported by WebGL but which does not support vertex texture lookups.
>
> So even after this is fixed in ANGLE and the fixes are on everyone's
> computers, you STILL cannot 100% rely on there being vertex texture
> support.  The key here being that the specification requires you to query
> the number of vertex textures available - and the response to that is
> allowed to be zero - and it most certainly IS zero on a couple of older
> computers that I own.
>
> Hence all applications that use vertex textures should provide a
> work-around for the lack of them...or, at the very least, a grovelling
> apology to the user for the total inadequacy of your application!
>
>  -- Steve
>
>
> > Umm! Its supposed to not need texture lookups...
> >
> >> To those needing a work around for the lack of texture lookups
> >
> > Regards
> >
> >     -Mark
> >
> >
> >
> >
> >
> > On 11/05/16 17:04, Benoit Jacob wrote:
> >> Firefox is not yet using a recent enough version of ANGLE to have this
> >> feature.
> >>
> >> I will try to update our ANGLE copy as soon as possible, for Firefox 6.
> >>
> >> Benoit
> >>
> >> ------------------------------------------------------------------------
> >>
> >>     It is not working for me in either FF4 or WebKit. In both cases, I
> >>     first of all see a screen with an image and below it the message
> >>     that I need a WebGL capable browser. That quickly disappears to be
> >>     replaced by black with a message below telling me I can use the
> >>     arrow keys to move left & right. Nothing further happens.
> >>
> >>     Regards
> >>
> >>         -Mark
> >>
> >>
> >>
> >>
> >>
> >>     On 11/05/14 5:53, John Davis wrote:
> >>
> >>         To those needing a work around for the lack of texture lookups
> >>         in the current Angle, here is a really cool way to handle
> >>         noise based vertex displacements.
> >>
> >>         http://www.pcprogramming.com/blog/caverns/caverns.html
> >>
> >>
> >
>
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://khronos.org/pipermail/public_webgl_khronos.org/attachments/20110516/6a8a928a/attachment.html>


More information about the public_webgl mailing list