[osg-users] osgShadow and gl3

[Robert Osfield]

HI Werner,

In the stable releases rhere isn't any built in support for remapping
built in types like osg::TexGen that set the gl_EyePlane etc.
attributes to osg_EyePlane uniforms.

I have an experimental branch, shader_pipeline, that has the
beginnings of a mapping to do this but it's not yet ready for general
testing.

For yourself, if you can build the OSG without specifically limiting
yourself to GL core profile then you'll get a better experience.  The
exception right now is OSX because Apple have taken the approach of
not implementation any modern GL features, and even GL3 they've
limited to a subset of only the GL3 core profile, no backwards
compatibility is provided.  OSX doesn't support GL4 yet, and no signs
of Vulkan support so it kinda looks like Apple are happy to relegate
OSX boxes to graphics backwater.

Robert.

Robert.

On 24 February 2017 at 14:52, Werner Modenbach
<Werner.Modenbach at texion.eu> wrote:
> Hi all,
>
> my project needs gl3 features and so I use the following methods:
>
> camera->getGraphicsContext()->getState()->setUseModelViewAndProjectionUniforms(useGL3);
> camera->getGraphicsContext()->getState()->setUseVertexAttributeAliasing(useGL3);
>
> Of course I need my own shaders then.
> I'm trying to make osgShadow working with my project.
> So far I have found the shader codes in StandardShadowMap and I try merging
> the functionality with my own shaders.
> Where I'm struggling is the gl_EyePlane[STRQ] stuff. It seems that is not
> made available as osg_EyePlane[STRQ] like other
> gl_ variables. Am I right? Is there any known way to get this working?
>
> Also there are cameras used inside shadowmaps. Those cameras have their own
> shaders (?) which are not gl3 conformant.
> Can this be influenced from my application?
>
> Thanks for any hints.
>
> - Werner -
>
> _______________________________________________
> osg-users mailing list
> osg-users at lists.openscenegraph.org
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org