Re: [Plib-users] Pre/Post draw callbacks on ssgBranches.

[Steve B. <sjb...@ai...>]

Jon Anderson wrote:

> >Hence, I think you'll have to call the tesselator function for some region
> >around
> >the intersection inside both isect and hot member functions.
> 
> Actually, since the terrain has a pointer to all the height field data. I
> have been just referencing that data directly, rather than trying to
> intersect the resulting mesh.

Excellent idea.  That should be *really* fast too.  The only 'gotcha'
is that applications can demand that you tell us which triangle was
intersected - it's vertices, etc.  I guess you just have to fake it
so that you give back three terrain height posts.
 
> >Incidentally, I'm assuming this is something that we'd put into ssgAux rather
> >into the main scene graph API - since not everyone will want it.  So we'd
> >better
> >talk about ssgaTerrain rather than ssgTerrain.
> 
> Sure.  This is definitely more of a auxiliary.  It's a pretty simple
> implementation right now, with limited flexibility.  Maybe I'll try
> implementing some things like the variance calculation function as call
> backs to allow an end programmer to customize it better.

Yes - I think that would be useful...of course you could donate it as-is
and set the bazaar loose on those improvements!

                  "Commit early - Commit often"

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