Robert,
LOL @ mis-reading my question. 😊
How would you check the values of vertices? I just need to see the transformed
values of a vertex.
Thanks,
-M
----------------------------------------
Marlin Rowley
Software Engineer, Staff
Missiles and Fire Control
972-603-1931 (office)
214-926-0622 (mobile)
marlin.r.row...@lmco.com
-----Original Message-----
From: osg-users <osg-users-boun...@lists.openscenegraph.org> On Behalf Of
Robert Osfield
Sent: Friday, September 28, 2018 3:41 AM
To: OpenSceneGraph Users <osg-users@lists.openscenegraph.org>
Subject: EXTERNAL: Re: [osg-users] Value of a variable in shaders?
Hi Marlin,
On Fri, 28 Sep 2018 at 07:40, Robert Osfield <robert.osfi...@gmail.com> wrote:
> To pass data into shaders you have use a combination of uniforms
> (osg::Unfiorm), textures (osg::Textre*) and vertex attributes. With recent
> 3.4.x onwards you also have the option of passing in constants via
> #prama(tic) shader composition system that passes #define values into the
> compilation of shaders.
Seems I mis-read your question :-)
Testing internal values in shader is an easy thing to do, what I end up doing
is build up shaders bit by bit making sure each bit works on it's own before I
assemble it into a more complex shader. When I want to test values I usually
just set the fragment colour value, though often this will have a processed
version of the value to make it visible. You can use #ifdef's in shaders to
toggle the debug code paths and even toggle these paths on/off via the
osg::StateSet::setDefine("ENABLE_DEBUG");
Robert.
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