Hi Cameron, Someone else will be able to answer about the depositing but this is a little tricky since the actual kernel depends on which SPH formulation is used: some use a cubic spline, some a quintic, etc., and some have the “smoothing length” as h while other use h/2. The Springel (2003) paper though is a good place to start; iirc, he has the equation for the cubic spline (along with the definition of h) there. —Molly On September 8, 2016 at 1:43:13 PM, Cameron Hummels (chummels@gmail.com<mailto:chummels@gmail.com>) wrote: Hey everyone, Britton, Devin, and I are writing up the Trident method paper, and we wanted to be explicit about how exactly yt deposits SPH field quantities on to an octree for particle-based fields. Are there any formal equations for this written down anywhere? I realize SPH support was added since the first yt method paper, so it isn't in there, and I cannot seem to find anything in the docs. I wonder if anyone has anything written down for this or if I'm missing it somewhere? Thanks! Cameron -- Cameron Hummels NSF Postdoctoral Fellow Department of Astronomy California Institute of Technology http://chummels.org _______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org