Hi Ulrich thanks - you are right - it was the wrong place
Dieter Unclassified Mail -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Ulrich Hertlein Sent: Thursday, 31 July, 2008 01:34 To: OpenSceneGraph Users Subject: Re: [osg-users] transparency becomes dark Hi Dieter, Dieter Pfeffer wrote: > I supposed that it has s.th to do with the missing material paramters; my > idea was to change the original material of the node, therefore I set: > > osg::StateSet *ss = loadedModel ->getOrCreateStateSet(); > osg::Material* blendMaterial = (osg::Material*)(ss->getAttribute(osg::StateAttribute::MATERIAL)); > > but the material is always NULL so I don't have the original material > > Is this the wrong function call ? The function call is correct, you're probably looking in the wrong spot ;-) I assume 'loadedModel' is the Node returned from 'readNodeFile'? If this is the case than most likely this is only a Group node that contains the rest of the scene graph. If you take a look at e.g. 'cow.osg' (or most of the examples) you'll see that the Material isn't actually attached to the top node. What you'll need to do is traverse the scene graph and find the Material node(s) you're looking for. For example you could look for a Node with a certain name and fetch it's Material. Also keep in mind that Materials are attached to StateSets which may be attached to Nodes *or* Drawables (attached to Geodes). Cheers! /ulrich _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org Disclaimer: This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender and delete this e-mail. Any unauthorized copying, disclosure or distribution of the material in this e-mail is strictly forbidden. Considering the inherent risks of the use of e-mail communication, Thales Nederland BV shall not be liable for any damage derived from it. Thales Nederland BV is seated in Hengelo (Ov.), the Netherlands, and registered at the Chamber of Commerce under number 06061578. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
