I'd be interested if sending the geometry back and forth to CP (Splice, I guess?) would be any faster than doing the work directly in ICE - assuming the work can actually be done in ICE.
On Tue, Oct 1, 2013 at 5:10 PM, Mathieu Leclaire <[email protected]>wrote: > It can be very tricky to do. > > The easiest way would be to convert your instances into mesh. There are > various ways to do that. ICE modeling or Momentum's instancer are possible > ways but if your instance master have hierarchies, you probably will need > to merge them so that it's only one object. The down side to this technique > is that converting instances to meshes can make a very large mesh depending > on the complexity of your scene. > > There are other ways you can proceed but they all require some very > advance and complex implementations. > > You can raycast on the instance masters by multiplying the ray origin and > direction by the reverse of the particle matrix, but you'll need to figure > out a way to select which particles to raycast on first as you don't > necessarily want to test all of them. And if you have more then one > instance master, you're going to have to separate each master in your ice > tree or line them up so they don't intersect and decal the origin > accordingly. It can become very complex very fast. > > Another idea is to use a tool like Creation Platform or Arnold to do the > ray tracing for you and return the proper information through a custom ICE > node or something, but that's another very complicated approach to > implement. > > Hopefully something like Momentum's instancer will be good enough for you. > If converting your instances to mesh is not feasible on your machine, then > I'm afraid there's no easy solution. > > -Mathieu > > -----Original Message----- > Subject: ICE: Raycast against instanced geo? > From: "Tim Crowson" <[email protected]> > To: [email protected] > Date: 2013/10/01 15:41:01 > > SignatureIs it possible for ICE to recognize instanced geometry when using > Raycasting? Either instanced explicitly by the user as in the case of a > model, or via pointcloud replication? > -- > > > Tim Crowson > Lead CG Artist > Magnetic Dreams, Inc. > 2525 Lebanon Pike, Building C. Nashville, TN 37214 > Ph 615.885.6801 | Fax 615.889.4768 | www.magneticdreams.com > [email protected] > > > -------------------------- > To unsubscribe: mail [email protected] with subject > "unsubscribe" and reply to the confirmation email. > > > > -------------------------- > To unsubscribe: mail [email protected] with subject > "unsubscribe" and reply to the confirmation email.
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