Okay, I've understand that, and I have to modify my function to set a node transparent, accessing to the color data and modifying it...
Thanks a lot for your help :-) Regards, Vincent. 2008/11/19 Sukender <[EMAIL PROTECTED]> > No, as I said, material is for lighting only. Loog at OpenGL references. > For instance http://www.falloutsoftware.com/tutorials/gl/gl8.htm . It > reads: "In OpenGL, by assigning a material property to an object (defined by > RGB color format), you are theoretically assigning the color which is > reflected by that object. When assigning a color to an object [...] you are > merely assigning the property which describes that object's color, it will > not react with light and will remain just that - the object's color." > > Sukender > PVLE - Lightweight cross-platform game engine - > http://pvle.sourceforge.net/ > > > Le Wed, 19 Nov 2008 17:51:25 +0100, Vincent Bourdier < > [EMAIL PROTECTED]> a écrit: > > > If I make a setcolor(R,G,B,0.5) the transparency is OK, so I can assume > this > > will be OK dynamically. > > > > But for the moment I use a setOpacity function, based on material... > > If there is no way to use this function, I'll try directly on the > > tranparency component of the color... but if it possible to use it, I > would > > prefer. > > > > > > 2008/11/19 Sukender <[EMAIL PROTECTED]> > > > >> Try to assign a signle color and BIND_OVERALL-it to the sphere. Change > then > >> the transparency dynamically, and tell me what happens! > >> > >> Sukender > >> PVLE - Lightweight cross-platform game engine - > >> http://pvle.sourceforge.net/ > >> > >> > >> Le Wed, 19 Nov 2008 17:32:52 +0100, Vincent Bourdier < > >> [EMAIL PROTECTED]> a écrit: > >> > >> > Hi, > >> > > >> > 2008/11/19 Sukender <[EMAIL PROTECTED]> > >> > > >> >> > Yes, I have a partially white sphere. I cannot set specular OFF, I > >> need > >> >> it > >> >> > for others nodes in the scene. I cannot modify light in fact. > >> >> > So I need to change skymap parameters. > >> >> > >> >> Yes, set the material of your sky sphere to have no specular > component. > >> >> > >> >> > >> >> > If I put lighting OFF, the opacity do not seems to work... > >> >> > >> >> Did you use GL_BLEND and TRANSPARENT_BIN as David said ? > >> >> Try to set a color for the vertices (forget about the material, > that's > >> for > >> >> lighting). > >> >> > >> > > >> > Okay, it changes the color, that's true. With this, I do not need no > >> > material anymore. But ... (see next) > >> > > >> >> > >> >> > >> >> > How can I combine : no ligthing area visible on skymap and > opacity > >> >> which > >> >> > can be changed ? > >> >> > >> >> I don't understand your sentence... (sorry). Do you mean you wish > your > >> sky > >> >> sphere to have a transparency that you change over time? > >> >> If so, there nothing special to do. Just try to make transparency > work > >> when > >> >> disable lighting. > >> >> > >> > > >> > Exactly ! ...But to change opacity I use material to set my own > >> transparency > >> > value... So I need material to do that. > >> > > >> > So for now, the problem is : I need material to change opacity value > >> along > >> > the time, and I need no material to avoid lighting on the sphere... > >> > > >> > Nice dilemma, isn't it ? :-( > >> > > >> > thanks, > >> > > >> > Vincent. > >> > > >> > > >> >> > >> >> > Thanks for help. > >> >> > >> >> De rien (= you're welcome = de nada = etc.). > >> >> > >> >> > >> >> Sukender > >> >> PVLE - Lightweight cross-platform game engine - > >> >> http://pvle.sourceforge.net/ > >> >> > >> >> > >> >> >> Hi Vincent, > >> >> >> > >> >> >> I'm not sure I understand... do you mean your blue sky sphere > appears > >> >> >> partially white because of lighting? If yes, try disabling > specular > >> >> >> components (on both light and sphere material if needed), this may > be > >> >> that > >> >> >> white spot. Or did you set light colors components >1? > >> >> >> And as far that I know, opacity is not related to lighting: you > can > >> have > >> >> a > >> >> >> semi-transparent sphere with lighting disabled. > >> >> >> > >> >> >> Sukender > >> >> >> PVLE - Lightweight cross-platform game engine - > >> >> >> http://pvle.sourceforge.net/ > >> >> >> > >> >> >> Le Wed, 19 Nov 2008 16:28:41 +0100, Vincent Bourdier < > >> >> >> [EMAIL PROTECTED]> a écrit: > >> >> >> > >> >> >> > Hi, > >> >> >> > > >> >> >> > Making a new king of skymap, I have this problem : the light > >> source, > >> >> >> closer > >> >> >> > to the skymap (sphere with blue material only), make it render > >> white, > >> >> >> > because of the lighting... > >> >> >> > I want to obtain the same thing without this white area... > >> >> >> > > >> >> >> > I need to manage opacity of this sphere, so Lighting ON seems to > be > >> >> >> > necessary, no ? > >> >> >> > > >> >> >> > The fact is I need a coloredsphere, not having this lighting > area > >> >> >> becoming > >> >> >> > white, and able to be set transparent. > >> >> >> > > >> >> >> > Any Idea ? > >> >> >> > > >> >> >> > I've tried changing lighting ON/OFF, material FRONT, BACK, FRONT > >> and > >> >> >> BACK, > >> >> >> > Emission component, Ambiant component... > >> >> >> > > >> >> >> > Thanks. > >> >> >> > > >> >> >> > Regards, > >> >> >> > Vincent. > >> >> >> > >> >> >> _______________________________________________ > >> >> >> osg-users mailing list > >> >> >> [email protected] > >> >> >> > >> >> > >> > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > >> >> > >> >> _______________________________________________ > >> >> osg-users mailing list > >> >> [email protected] > >> >> > >> > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > >> > >> _______________________________________________ > >> osg-users mailing list > >> [email protected] > >> > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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