Hello Marcus,
Marcus Lindblom wrote:
> So, VisitSubTree works fine, but IntersectAction probably needs some
> work in order to show the correct path.
"show the correct path"? Is this related to the tex coord code you
posted, that relies on getToWorld() ?
It is a limitation of VisitSubTree that it breaks the parent chain and
therefore can not get the to-world matrix.
> (Yes, I know, I'm going down a multiple-parents-per-node path here,
> which OpenSG tries to avoid)
>
> Nevertheless, what I mostly need is the actual to-world transform of the
> intersected node,
the matrix could be just another element of the "hit record" the IA
holds. However the IA would need its own matrix stack to actually
accumulate transformations along the path it takes - after all
getToWorld() on the node with the hit does not work... ;)
> 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.
> 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.)
> If so, how should I go about patching that? Either just grab the
> transform and add get-function for it (similar to Point/Object/Normal)
> or is there some better way?
Sounds reasonable to me.
Cheers,
Carsten
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