Hi Ian, The osgParticle library has its own update mechanism, see the osgparticle example.
Robert. On 6/18/07, Crezy Elmo <[EMAIL PROTECTED]> wrote:
Hello, I'm implementing a particle system with very unique requirements in that every individual particle has different forces acting on it. What I want to do is calculate the particle system physics myself at every frame, and then just let osg update the particle positions. Right now I'm doing this every frame: //Update particle positions for (int i=0;igetParticle(i))->setPosition( Vec3( (ps.particles[i]).position.x, (ps.particles[i]).position.y, (ps.particles[i]).position.z)); } Where the ps object holds my own calculations for the particle position at every frame. The above code is EXTREMELY slow. Does the right way to do this involve using the ParticleSystemUpdater class? From my understanding, with osg you need to define a callback using setUpdateCallback for the ParticleSystemUpdater class, which then calls an update routine for each node. My questions are: 1) How can I find out which particle, "i" is calling the update function, so that the position can be updated correctly for that individual particle? Is there a way to get an id number for the particle calling the update callback? 2) Anyone have any links to example code on how to define your own NodeCallback? Thanks! Ian _________________________________________________________________ With Windows Live Hotmail, you can personalize your inbox with your favorite color. www.windowslive-hotmail.com/learnmore/personalize.html?locale=en-us&ocid=TXT_TAGLM_HMWL_reten_addcolor_0607_______________________________________________ osg-users mailing list [email protected] http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/
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