From guest Tue May 31 19:08:08 1994 id AA10582; Tue, 31 May 94 21:07:56 CDT Date: Tue, 31 May 94 21:07:56 CDT From: reedwhit@skips.dseg.ti.com (Reed Whittington) Message-Id: <9406010207.AA10582@skips.dseg.ti.com> To: iris-performer@sgi.sgi.com Subject: Fun with pfChanPick Status: OR Dear Performer group people, I'm looking for help with pfChanPick. I have been working with pfChanPick in a target designation application. I found that pfChanPick fails if a pfSwitch (ON or OFF) is between the scene root and the primitive I want to pick. I also have found that pfChanViewOffsets don't get accounted for in pfChanPick. Are these known problems and can you suggest a work around? As always, Thanks for your help. --Reed From guest Fri Jun 3 15:16:13 1994 From: "Sharon Fischler" Message-Id: <9406031515.ZM18966@rose.asd.sgi.com> Date: Fri, 3 Jun 1994 15:15:54 -0700 In-Reply-To: reedwhit@skips.dseg.ti.com (Reed Whittington) "Fun with pfChanPick" (May 31, 9:07pm) References: <9406010207.AA10582@skips.dseg.ti.com> X-Mailer: Z-Mail (3.1.0 22feb94 MediaMail) To: reedwhit@skips.dseg.ti.com (Reed Whittington), iris-performer@sgi.sgi.com Subject: Re: Fun with pfChanPick Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 Status: OR +>---- On May 31, 9:07pm, Reed Whittington wrote: > Subject: Fun with pfChanPick -> [ ... ] ->I also have found that pfChanViewOffsets don't get accounted for ->in pfChanPick. I'm afraid that this is indeed true. The pick traversal looks at the current view(xyz,hpr), near/far, and fov. You will have to set the Channel Viewpoint in each of the channels individually, or set/reset around the pick traversal. This may also account for some troubles other folks have been having doing picking on secondary channels. Thanx for the report! srf. -- -----{-----{---@ -----{----{---@ -----{----{---@ -----{----{---@ Sharon Rose Fischler - Silicon Graphics, Advanced Graphics Development srf@sgi.com (415) 390 - 1002 FAX: (415) 965 - 2658 MS 8U-590 -----{-----{---@ -----{----{---@ -----{----{---@ -----{----{---@ From guest Mon Jun 27 23:49:16 1994 From: alon@bvr.co.il (Alon Rosenfeld 18 Hatzedef street Jaffa ) Message-Id: <9406280948.ZM11775@rea1.bvr.co.il> Date: Tue, 28 Jun 1994 09:48:03 +0000 X-Mailer: Z-Mail (3.1.0 22feb94 MediaMail) To: info-performer@sgi.sgi.com Subject: pfChanPick Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 Status: OR Hi there, I am currently using the pfChanPick routine. To enable selective picking I set isect masks of different nodes and GeoSets to have appropriate masks according to the object's type (using pfNodeTravMask). The only thing left to do before calling pfChanPick() is to set the channel isect traversal mask with which the traversal will compare with the individual nodes. How does one set this channel traversal mask? When calling pfSegsIsectGSet() one can set the traversal mask but how do you do it when calling pfChanPick()? Alon From guest Wed Jun 29 23:15:47 1994 From: alon@bvr.co.il (Alon Rosenfeld 18 Hatzedef street Jaffa ) Message-Id: <9406300900.ZM18215@rea1.bvr.co.il> Date: Thu, 30 Jun 1994 09:00:01 +0000 X-Mailer: Z-Mail (3.1.0 22feb94 MediaMail) To: info-performer@sgi.sgi.com Subject: pfChanPick Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 Status: OR Hi, I am currently using the pfChanPick routine. To enable selective picking I set isect masks of different nodes and GeoSets to have appropriate masks according to the object's type (using pfNodeTravMask). The only thing left to do before calling pfChanPick() is to set the channel isect traversal mask with which the traversal will compare with the individual nodes. How does one set this channel traversal mask? For Draw and Cull traversals one may use pfChanTravMask() but what routine should I use when using the pfChanPick() call? thanks Alon From guest Thu Jun 30 12:05:33 1994 Message-Id: <9406301904.AA24743@surreal.asd.sgi.com> To: alon@bvr.co.il (Alon Rosenfeld 18 Hatzedef street Jaffa ) Cc: info-performer@sgi.sgi.com Subject: Re: pfChanPick In-Reply-To: Your message of "Thu, 30 Jun 94 09:00:01 -0000." <9406300900.ZM18215@rea1.bvr.co.il> Date: Thu, 30 Jun 94 12:04:49 -0700 From: Jim Helman Status: OR > How does one set this channel traversal mask? For Draw and Cull traversals one > may use pfChanTravMask() but what routine should I use when using the > pfChanPick() call? Currently, pfChanPick's mask is hard coded to PFTRAV_SET_PICK. But using the currently unused pfChanTravMask(PFTRAV_ISECT) sounds like a possible idea for a future release. For now, if you want different masks, you should use pfSegsIsectNode(). rgds, -jim helman jimh@surreal.asd.sgi.com 415/390-1151