Hello Mateusz,
When you use instanced drawing you cannot have correct semi-transparent
objects, as there is no sorting involved.
One option is to sort your instanced obejcts in every frame or to use
some order independent transparency approach.
Also concerning your Material and stateset problems:
When using instancing you will somehow have to pass per instance data to
your shaders and evaluate them there. So if you need per instance colors
you need to pass an array which hold the instance color.
It will not work using osg::Material out of the box.
cheers
Sebastian
Hi,
I have implemented the simplest fragment shader applying only particular color
to my primitives as this was sufficient. However now I want to create a
composition of a simple osg::ShapeDrawable for a osg::Box and my instanced
material (spheres), where Box should be semitransparent and so should be the
instanced material. But what I get You can see in the attached photos. In the
first one Box is theoretically transparent, but I can`t see the material inside
it. In the second photo, if I am inside the Box I can see both semi
transparent: box and material. Does anyone know how to fix it also for viewing
box from outside to be transparent and material inside would be visible?
Probabbly some neaty StateSet configuration or more complex fragment shader?
Additionally - does osg support Material for instanced objects or I have to
implement it with whole light manualy in fragment shader? I was thinking about
some default osg fragment shader providing complete light and material handli
ng but I think such thing does not exist. Am I wrong?
Thank you!
Cheers,
Mateusz
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=56358#56358
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