opengl & directx

Hello,
i'm wondering if there is something like glFeedback mode in directx . Can
anyone help me ?

with regards
Piotrek

> i'm wondering if there is something like glFeedback mode in directx . Can
> anyone help me ?

There isn't, but if you need glFeedback you should consider refactoring your
code in a way that it isn't needed. What you needing it for? We can propably
together think much more efficient way to get you results you want, rather
than thinking of way to emulate something that doesn't exist.

Normally you'd want this for, say, knowing what's under the cursor.. but
don't worry, even if it sounds like *extra work*, often it's much better to
have fast ray-primitive intersection framework in your dataset to begin
with. It's often order of magnitude faster to do something with CPU, in
system memory, than put the burden to graphics hardware. I mean in READBACK
situations. If your database is hierarchical, say, octree, you can do the
intersection query in less than 10K clock cycles, including cache misses, in
average case. It can be a lot faster with trivial reject case.

Ignore the above paragraph if it doesn't apply to your situation and feel
free to explain better what you want to be done. I just wrote that based on
accumulated experience, most of the time it boils down to that case,
afterall. I don't say I can't be wrong, that's why I say it was educated
_guess_ only.

(Hey, you could be doing anything I never could possible even think of..)