[osg-users] [osgOcean] 3D model material display error!

Tian Ma tianxiao888 at foxmail.com
Mon Nov 2 03:06:15 PST 2009


Hi Jan,Kim:

Thank you a lot.

     Kim, does it means that: I can never keep the models looks like what they are before? And I have to program shaders for every loaded models, in order to have reflect or other effects?

     I want to know that: is there a simple way to make the models just look like what they are?



Kim Bale wrote:
> Hi Jan, Tian,
> 
> osgOcean uses shaders for pretty much every effect in the scene -
> fogging, depth of field, glare, lighting etc. If objects that are
> added to the scene are to look consistent with the ocean effects they
> will require a shader to be applied that takes into account these
> effects. This is particularly necessary if the fullscreen effects are
> used as they require the alpha component of the frame buffer to work.
> 
> In order to address this issue, OceanScene will apply a default shader
> to objects added as children (default_scene.frag & vert) which
> illustrates how to use the uniforms supplied by osgocean (prefixed
> osgOcean_* ) in conjunction with your own shader. Since I could not
> anticipate the many wierd and wonderful ways that shaders can be used
> it only offers a very basic implementation (1 texture unit, limited
> phong lighting etc) and should be seen as a shader to customise and
> build on yourself.
> 
> You can override the default shader either by attaching a new program
> to the object you wish to use in the scene or by using this function
> in OceanScene:
> 
> /** Override the default scene shader for custom shaders.
> * If custom shaders are required for individual nodes add them
> before adding to the OceanScene.
> * Dirties state.
> */
> void setDefaultSceneShader( osg::Program* program )
> {
> _defaultSceneShader = program;
> _isDirty = true;
> }
> 
> Alternatively you can turn the default shader off completely with
> setter in OceanScene.
> 
> Regards,
> 
> Kim.
> 
> 
> 
> 
> 
> 
> 2009/11/2 Jan Ciger <>:
> 
> > "Tian Ma" <> wrote:
> > 
> > > Hi,
> > > 
> > >    When I load a model into the osgOcean scene, the model looks white all
> > >  over, without any material. Anybody knows why?
> > > 
> > 
> > Yes, I have seen the same thing. I believe that the shaders applied by
> > osgOcean are responsible and are not passing the the vertex colors along.
> > I have yet to check the shader code, though.
> > 
> > Regards,
> > 
> > Jan
> > 
> > _______________________________________________
> > osg-users mailing list
> > 
> > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
> > 
> > 
> > 
> _______________________________________________
> osg-users mailing list
> 
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
> 
>  ------------------
> Post generated by Mail2Forum


------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=19021#19021







More information about the osg-users mailing list