Hello,
I have nothing to contribute to that particular question but... sorry an important question that came back to me when I read these mailings. What is the best way of porting a 32 bit opensg 1.8 app to 64bit & OpenSG 2.0 lateron? First port to 2.0 then to 64bit or the other way round or all together in one step? Some more stupid questions I am considering: How does the graphics hardware behave when it is corresponding with a 64bit application. Is that happening behind the scenes or do I have to take care and think about every type of data - if they need to be converted or not? E.g. do I have to convert trimesh data from float to double? Do I need to keep the data as 64 bit values in Opensg already? Does the graphics card work in 64bit or 32 bit at all? Thank you in advance, Georg. -----Ursprüngliche Nachricht----- Von: Carsten Neumann [mailto:carsten_neum...@gmx.net] Gesendet: Sonntag, 6. Juni 2010 17:55 An: opensg-users@lists.sourceforge.net Betreff: Re: [Opensg-users] Depth of Field in OpenSG Hello Ria, On 06.06.2010 05:36, Ria Müller wrote: > Dirk Reiners schrieb: >> On 06/05/2010 04:09 PM, Ria Müller wrote: >>> I try to do a depth of field effect in OpenSG using a two-pass >>> Post-processing Shader. >>> On the first pass the scene is rendered, outputting the color, depth and >>> a blurriness factor (depending on the depth). >>> On the second pass the image from the first pass is filtered with a >>> variable-sized filter kernel to simulate the circle of confusion. The >>> blurriness factor from the first pass controls the size of the filter >>> kernel. >>> >>> For being able to render in the scene to multiple buffers (color in >>> RGBA8 and blurfactor in RGBA16) at one time I need to use multiple >>> Render Targets. Unfortunately I'm very new to OpenSG and using 1.8 I >>> couldn't find any descriptions or examples how to do that. >>> Up to now I create two diffrent textures and attach them to an >>> FBOViewport-Object: hm, that sounds like the right approach in general. Are you perhaps on hardware that does not support render targets with different bits per fragment (you have 32 for the color target and 64 for the blurfactor target)? >> sorry, I don't have the time to look into the details of your code right now. >> But in general FBO support is much better in OpenSG 2. What you're trying to do >> is probably pretty simple based on Carsten's Deferred Shading framework, which >> has to do post-processing anyway. >> >> Carsten, can you comment a little bit on this one? sorry for the delay, my graphics card decided to quit service yesterday... > thank you for your fast answer. > Unfortunately I need to use OpenSG 1.8 because I use a Stereosystem > which is based on this version. > Nevertheless I am interested in Carsten's Deferred Shading framework. > Maybe I can get some hints from it. FWIW, I think a better example in 2.0 is the HDRStage since it has a pretty similar approach, i.e. render the scene to FBO and run a post-processing step over it. > Does anybody know what the warning " FBO initialize pre OpenGL error: > invalid operation!" means? It reports the OpenGL error "Invalid Operation". What exactly causes this errors is unfortunately a bit tricky to tell as the place where it reports the error is *before* initializing an FBO (so the error does not necessarily have anything to do with the FBO, but is only the place where it is first caught). The easiest way to find out what exactly causes the error is to run the program under an OpenGL debugger. Cheers, Carsten ---------------------------------------------------------------------------- -- ThinkGeek and WIRED's GeekDad team up for the Ultimate GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the lucky parental unit. See the prize list and enter to win: http://p.sf.net/sfu/thinkgeek-promo _______________________________________________ Opensg-users mailing list Opensg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/opensg-users ------------------------------------------------------------------------------ ThinkGeek and WIRED's GeekDad team up for the Ultimate GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the lucky parental unit. See the prize list and enter to win: http://p.sf.net/sfu/thinkgeek-promo _______________________________________________ Opensg-users mailing list Opensg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/opensg-users
