Carsten Neumann wrote: > Hello Marcus, > > Marcus Lindblom wrote: >> Carsten Neumann wrote: >>> Marcus Lindblom wrote: >>>> not necessarily the entire path from root to node. >>>> (Although it might be handy to have as well...) >>> Maybe, but then you'd need a stack of Node * as well and make sure every >>> Node on the path gets pushed/popped, instead of only those that change >>> the transformation matrix - I guess a suitable default functor could be >>> used. >> Hm. I'll have to look into how the Actions work more closely to attempt >> that. I don't need it know anyhow. > > sorry, it seems I was thinking of the NewAction stuff I had written for > 1.x some time ago. There you could register a function that was called > when no type specific function was registered.
I actually don't know much about actions in either version. :-| >>>> Does it seem a reasonable thing to fix? >>> sure, providing the to-world matrix seems like a better idea than e.g. >>> computing the tex coords of the hit point (otherwise next month it might >>> become necessary to compute/store tangent space as well, etc.) >> No, I still need the tex-coords, as we have separate images to indicate >> different semantics on various parts of an object. I could of course add >> this code into IntersectAction to allow the user to compute other >> interpolated attributes at the intersection point. Just provide the >> attribute array index and it'll do the rest. > > sorry, I meant to say that it makes more sense to have the IA provide > the matrix for the hit object, instead of having it compute/store tex > coords for the hit point. The former can be used to compute all sorts of > useful data, the latter is just what you need right now and I was > worried that that might not scale well. My plan was to have the IA provide that computation on request afterwards. Of course, a general utility function could also be used (in the triangle iterator). The to-world is also useful, and having that (or just the local point) would allow the IA to compute interpolated attributes afterwards. > hm, and seeing Dirks mail he seems to prefer something even more general ;) Indeed. :) /Marcus ------------------------------------------------------------------------------ OpenSolaris 2009.06 is a cutting edge operating system for enterprises looking to deploy the next generation of Solaris that includes the latest innovations from Sun and the OpenSource community. Download a copy and enjoy capabilities such as Networking, Storage and Virtualization. Go to: http://p.sf.net/sfu/opensolaris-get _______________________________________________ Opensg-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/opensg-users
