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
