Hi Michael, You can try one of the following: 1. Fix the problem in ParticleSystem.cpp and submit it to Robert. 2. Backout the 7961 changes to ParticleSystem.cpp. 3. Change the particle rotation axis so particles rotate about the Y axis instead of the Z axis.
Number 3 is probably not the best as you will need to change it again once the problem is fixed. > -----Original Message----- > From: Michael Bach Jensen [mailto:[EMAIL PROTECTED] > Sent: Friday, December 05, 2008 4:44 AM > To: [email protected] > Subject: Re: [osg-users] Particle system > setInitialRotationalSpeedRange() > > Hi all! > > We are having this issue as well in our simulation software, > since we are also rotating our smoke particles to add a nice > motion the smoke. > Any idea when it will be fixed? Or does someone know of a workaround? > > Kind regards, > Michael > > *** > > Zsa Zsa Gabor - "A man in love is incomplete until he has married. > Then he's finished." > > > 2008/12/5 Michael Bach Jensen <[EMAIL PROTECTED]>: > > Hi Thom, > > > > Thanks for the detective work. The change you've suggested > as causing > > the regression is r7961. > > > > http://www.openscenegraph.org/projects/osg/changeset/7961 > > > > It's six months since I code this so it's a bit cold a topic so off > > the top of my head I can't point to anything in a > particular as being > > the cause of the problems. I will have to sit down and > step through > > the code. > > > > Thanks for pointing out that SmokeBox.osg reproduces the > problem, with > > the problem in front of me it's very difficult to spot > issues in code. > > > > Robert. > > > > > > On Tue, Nov 11, 2008 at 11:21 PM, Jolley, Thomas P <[EMAIL > PROTECTED]> > > wrote: > >> Hi Robert, > >> > >> I've looked into this a little further. It appears the > changes you > >> made to ParticleSystem.cpp on March 17th is the reason for the > >> behavior change. I don't have a solution yet other than > backing out > >> the changes. I'm still trying to understand what you're > doing in the > >> single_pass_render function before coming up with a solution. > >> > >> I think this problem was mentioned in an earlier thread around May. > >> See > >> > http://lists.openscenegraph.org/pipermail/osg-users-opensceneg > raph.org/2008-May/011595.html. > >> > >> To see the problem look at SmokeBox.osg with osgviewer > (I'm using osg > >> 2.6.0). The particles are rotating about the wrong axis > (or at least > >> a different axis). > >> > >> ---- > >> Tom Jolley > >> > >> > >> ________________________________ > >> From: Jolley, Thomas P > >> Sent: Thursday, August 21, 2008 2:11 PM > >> To: OpenSceneGraph Users > >> Subject: Re: [osg-users] Particle system > >> setInitialRotationalSpeedRange() > >> > >> Hi Erik, > >> > >> I noticed the same thing about a week ago while upgrading an > >> application from osg 1.0 to 2.4. It was on my list of > things to look into. > >> > >> ________________________________ > >> From: Erik Johnson [EMAIL PROTECTED] > >> Sent: Thursday, August 21, 2008 10:30 AM > >> To: [email protected] > >> Subject: Re: [osg-users] Particle system > >> setInitialRotationalSpeedRange() > >> > >> There is certainly a change in behavior, although I can't pinpoint > >> the change in code yet. > >> > >> Setting the rotational speed with (0, 0, 1): > >> OSG 2.2.0 - particles rotate like fans (pinwheels) OSG 2.4.0 - > >> particles rotate like a margarita blender (cork-screw) OSG 2.6.0 - > >> particles rotate like a margarita blender (cork-screw) > >> > >> I guess I'm just wondering if this is the expected > behavior? And I'm > >> surprised nobody has a problem with this. > >> > >> Thanks, > >> Erik > >> > >> > >>> Date: Thu, 21 Aug 2008 09:26:52 +0100 > >>> From: "Robert Osfield" <[EMAIL PROTECTED]> > >>> Subject: Re: [osg-users] Particle system > >>> setInitialRotationalSpeedRange() > >>> To: "OpenSceneGraph Users" <[email protected]> > >>> Message-ID: > >>> <[EMAIL PROTECTED]> > >>> Content-Type: text/plain; charset=ISO-8859-1 > >>> > >>> Hi Erik, > >>> > >>> osgParticle has hardly been touched between OSG-2.2 and > 2.6. Use svn > >>> log to check which files have changed. > >>> > >>> Robert. > >>> > >>> On Thu, Aug 21, 2008 at 1:07 AM, Erik Johnson <[EMAIL PROTECTED]> > >>> wrote: > >>> > Hi all, > >>> > > >>> > It seems to me, back in the OSG 2.2.x time frame, that > I could set > >>> > the initial rotational velocity of the RadialShooter > and have the > >>> > particles "pinwheel" around their center point, while > maintaining > >>> > their billboard orientation and face the Camera. > Perhaps it was a rotation on the "Y" > >>> > axis. > >>> > > >>> > Nowadays with OSG 2.4/2.6, setting the rotational speed > will cause > >>> > the particles to rotate relative to the world axis and > not in the > >>> > camera-relative axis. > >>> > > >>> > Is this a bug? A feature? Is it still posible to "pinwheel" a > >>> > particle around? Does anyone use > setInitialRotationalSpeedRange()? > >>> > > >>> > This was a cool effect which added a nice dimension to smoke > >>> > plumes and such. > >>> > > >>> > Thanks for any info! > >>> > -Erik Johnson > >>> > > >>> > > >>> > _______________________________________________ > >>> > osg-users mailing list > >>> > [email protected] > >>> > > >>> > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegr > >>> > aph.org > >>> > > >>> > > >>> > >> > >> > >> _______________________________________________ > >> osg-users mailing list > >> [email protected] > >> > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph > >> .org > >> > >> > > _______________________________________________ > > osg-users mailing list > > [email protected] > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph. > > org > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-opensce > negraph.org > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
