[osg-users] Does OSG work on Mac OS?

[Robert Osfield]

Hi Martin,

On 18 September 2017 at 10:23, GeeKer Wang <wwthunan at gmail.com> wrote:

> I am actually using the git version, which doesn't work. Although I have:
>
> glVersion=4.1, isGlslSupported=YES, glslLanguageVersion=4.1,
>
> there are still errors for osgsimplegl3:
>
> Warning: detected OpenGL error 'invalid enumerant' at Before
> Renderer::compile
> WARNING: Could not find vertex shader attribute 'osg_MultiTexCoord7' to
> match BindAttributeLocation request.
> WARNING: Could not find vertex shader attribute 'osg_MultiTexCoord5' to
> match BindAttributeLocation request.
> WARNING: Could not find vertex shader attribute 'osg_SecondaryColor' to
> match BindAttributeLocation request.
> WARNING: Could not find vertex shader attribute 'osg_MultiTexCoord1' to
> match BindAttributeLocation request.
> WARNING: Could not find vertex shader attribute 'osg_MultiTexCoord6' to
> match BindAttributeLocation request.
> WARNING: Could not find vertex shader attribute 'osg_FogCoord' to match
> BindAttributeLocation request.
> WARNING: Could not find vertex shader attribute 'osg_Color' to match
> BindAttributeLocation request.
> WARNING: Could not find vertex shader attribute 'osg_MultiTexCoord4' to
> match BindAttributeLocation request.
> WARNING: Could not find vertex shader attribute 'osg_MultiTexCoord2' to
> match BindAttributeLocation request.
>

Others are using GL Core Profile under OSX with git master OK, I will have
to leave it to them to help you further on OSX as I don't have OSX myself.

Even not for Mac, how about mesa3d, which doesn't work if no special
> graphic?
>

I haven't tested Mesa3D on a Mac so can't comment on this.  In principle is
should work, but Mesa3D isn't just one version...


>
> For example,  I tried osgsimplegl3 in ubuntu in parallel virtual machine,
>
> VERTEX glCompileShader "" FAILED
> VERTEX Shader "" infolog:
> 0.1(10): error: GLSL 1.40 not supported
>
> because mesa3d only support GLSL 3.3 in core profile.
>
> Then OSG doesn't support core profile in linux. Am I right? Or is there
> special compiling flags to turn on?
>

git master should support it just fine.

FYI, I develop under Kubunutu as my main dev system and test out various
version of GLSL as part of my work.

Typically under Linux you don't need to explicitly compile against GL Core
Profile, everything works fine with the compatibility Profile.  I am aware
that recent support for recent GL versions in Mesa has temporarily not
provided the Compatibility Profile. but this is likely to change in
future.   I recently checked in code to explicitly requesting specific
version of GL when creating graphics context, have a look at the logs for
osgViewer.

What may be affecting you is GL support under the virtual machine, doing so
just adds more layers that can compromise full support of the hardware.

Robert.
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