Hi Guang, Some more comment on this. Some PC graphics cards don't support a separate Z-buffer for the right and left eye, but instead share the same Z-buffer. In this case we have to clear left and right buffer separately instead of setting STEREO_BOTH and clear only once at the beginning of each loop. In retained mode (non-pure immediate mode) Java3D will do this automatically when property j3d.sharedstereozbuffer is set (by default). Note that this doesn't affect the buffer swap.
Thanks. - Kelvin ---------- Java 3D Team Sun Microsystems Inc. ------------- Begin Forwarded Message ------------- Delivered-To: [EMAIL PROTECTED] MIME-Version: 1.0 Date: Fri, 30 Nov 2001 15:03:49 -0800 From: Kelvin Chung <[EMAIL PROTECTED]> Subject: Re: [JAVA3D] Images not stable Comments: To: [EMAIL PROTECTED] To: [EMAIL PROTECTED] >Delivered-To: [EMAIL PROTECTED] >MIME-Version: 1.0 >Date: Fri, 30 Nov 2001 14:59:29 -0800 >From: Kelvin Chung <[EMAIL PROTECTED]> >Subject: Re: [JAVA3D] Images not stable >Comments: To: [EMAIL PROTECTED] >To: [EMAIL PROTECTED] > >Hi Guang, > > There is bug in the test program >(1) In renderRight() > gc.clear(); > gc.setBufferOverride(true); > gc.setStereoMode(GraphicsContext3D.STEREO_RIGHT); > > clear() will only clear STEREO_LEFT buffer since > it is set before. We should put this after > gc.setStereoMode(GraphicsContext3D.STEREO_RIGHT); > Best of all, setting GraphicsContext3D.STEREO_BOTH > will only invoke clear() once instead of twice. >(2) There is no need to invoke swap() two times > - one for each buffer. Instead swap() will swap > both left/right buffer. >(3) No need to invoke > gc.setBufferOverride(true); > every frame, only one at the beginning is good > enough. >(4) There is no distingiush between left and right > GraphicsContext3D. > gc = canvas.getGraphicsContext3D(); > ... > gcLeft = canvas.getGraphicsContext3D(); > They are the same. > >I've modify your program (see attachment) >and it seems to run fine. > I attach the wrong file without setBufferOverride(true) Here it is again. - Kelvin ------------- End Forwarded Message ------------- =========================================================================== 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".
