I just commented out the emissive color in the appearance, and I still get a red polyhedron. .....
Well, I just found it. In my mousebehavior class I attach a DirectionalLight to the view platform BranchGroup. But I don't attach a light when I originally define the view platform. So the light definition was "hidden from view". :) Thanks, Bob Gray -----Original Message----- From: Discussion list for Java 3D API [mailto:[EMAIL PROTECTED]]On Behalf Of John Wright Sent: Wednesday, February 20, 2002 1:02 PM To: [EMAIL PROTECTED] Subject: Re: [JAVA3D] Light Question Bob, it looks like you are setting an emissive color. An emissive color will "glow in the dark". - John Wright Starfire Research RWGRAY wrote: > > I thought that if there are no Lights (Ambient, Direction, etc.) in the > scene then Shapes with Appearances which define a Material would not be > seen. I thought you had to have at least an AmbientLight in the scene to > see the Shape. > > But I commented out *all* Light objects and I can still see the object. It > is still red and has different shades of red depending on the orientation of > the object's surface plane to the view. (I set normals in all the objects.) > > Why? > > At one point, I thought I *had* to have an AmbientLight (to get general > gray-like, flat illumination) plus attach a DirectionalLight to the > ViewPlatform to see the object with color and color shading. But now it > seems to work without any lights defined at all? What am I forgetting and > how lights work? > > Below is my appearance definition. > > Cheers, > Bob Gray > > Appearance A = new Appearance(); > > RenderingAttributes RA = new RenderingAttributes(); > RA.setDepthBufferEnable(true); > A.setRenderingAttributes(RA); > > // We want the Planes to have their color defined > // using materials. > > Material theMaterial = new Material(); > theMaterial.setCapability(Material.ALLOW_COMPONENT_READ); > theMaterial.setCapability(Material.ALLOW_COMPONENT_WRITE); > > theMaterial.setLightingEnable(true); > theMaterial.setShininess(PAA.shininess); > > theMaterial.setDiffuseColor(PAA.diffuseColor); > > theMaterial.setAmbientColor(PAA.ambientColor); > theMaterial.setEmissiveColor(PAA.emissiveColor); > theMaterial.setSpecularColor(PAA.specularColor); > > A.setMaterial(theMaterial); > > // Setup polygon attributes > PolygonAttributes PlyA = new PolygonAttributes > (PolygonAttributes.POLYGON_FILL, > PolygonAttributes.CULL_NONE, 0.01f, true); > > A.setPolygonAttributes(PlyA); > > // Setup Treansparency > > TransparencyAttributes TA = new TransparencyAttributes > (PAA.transparencyType, PAA.transparencyValue); > TA.setCapability(TransparencyAttributes.ALLOW_VALUE_READ); > TA.setCapability(TransparencyAttributes.ALLOW_VALUE_WRITE); > TA.setCapability(TransparencyAttributes.ALLOW_MODE_READ); > TA.setCapability(TransparencyAttributes.ALLOW_MODE_WRITE); > > A.setTransparencyAttributes(TA); > > return(A); > > =========================================================================== > To unsubscribe, send email to [EMAIL PROTECTED] and include in the body > of the message "signoff JAVA3D-INTEREST". For general help, send email to > [EMAIL PROTECTED] and include in the body of the message "help". =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA3D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help". =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA3D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".
