Re: [PD] (GEM) Getting the z-buffer value of a pixel in a rendered image
Le jeudi 16 juin 2011 à 14:21 +0200, Jack a écrit : It is possible to use shader to define the z-buffer. What i mean is not z-buffer but depth of a vertex. ++ Jack gl_ModelViewMatrix * gl_Vertex gives the eye coordinate position of each vertex (it is what we need here to define the depth of each vertex). See example attached. You can change this example to apply the depth to alpha channel. ++ Jack Le mercredi 15 juin 2011 à 17:09 -0400, Mathieu Bouchard a écrit : On Fri, 10 Jun 2011, Matteo Sisti Sette wrote: Is there a way in GEM to take a snapshot of a rendered scene (such as with pix_snap) and save the z-buffer information, for example saving it as an extra channel? (e.g. have the z value saved as the alpha channel)? I'm interested in getting an image of the scene as it would appear if it was captured by a depth sensor like a Kinect... How many bits do you expect the z-buffer to be, and how can that possibly fit in any GEM pix structure ? AFAIK, only GridFlow, PDP and iemmatrix are equipped to handle that data. ___ | Mathieu Bouchard tél: +1.514.383.3801 Villeray, Montréal, QC ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list signature.asc Description: This is a digitally signed message part ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] (GEM) Getting the z-buffer value of a pixel in a rendered image
2011/6/16 Jack j...@rybn.org: Le jeudi 16 juin 2011 à 14:21 +0200, Jack a écrit : It is possible to use shader to define the z-buffer. What i mean is not z-buffer but depth of a vertex. Yeah that's exactly what I was looking for. I thought that depth was what is saved in the z-buffer. My understanding of OpenGL is quite poor... Thank you very much m. ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] (GEM) Getting the z-buffer value of a pixel in a rendered image
On Fri, 10 Jun 2011, Matteo Sisti Sette wrote: Is there a way in GEM to take a snapshot of a rendered scene (such as with pix_snap) and save the z-buffer information, for example saving it as an extra channel? (e.g. have the z value saved as the alpha channel)? I'm interested in getting an image of the scene as it would appear if it was captured by a depth sensor like a Kinect... How many bits do you expect the z-buffer to be, and how can that possibly fit in any GEM pix structure ? AFAIK, only GridFlow, PDP and iemmatrix are equipped to handle that data. ___ | Mathieu Bouchard tél: +1.514.383.3801 Villeray, Montréal, QC ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
[PD] (GEM) Getting the z-buffer value of a pixel in a rendered image
Hi, Is there a way in GEM to take a snapshot of a rendered scene (such as with pix_snap) and save the z-buffer information, for example saving it as an extra channel? (e.g. have the z value saved as the alpha channel)? I'm interested in getting an image of the scene as it would appear if it was captured by a depth sensor like a Kinect... Thanks m. ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
