Robert Grzeszczuk (rg)
Wed, 17 Feb 1999 17:52:19 -0800
Indeed, PickAction currently only supports V3F vertex format. Implementation
that supoports other formats is actually somewhat involved (e.g., given (x,y,z)
along a ray, one has to determine which tetra the point is in, compute
barycentric coords and interpolate per-vertex values). May happen one of these
days, though. In the meantime, you can use a shadow TetraSet in V3F format to
get the textel values.
What are you using the per-vertex properties for, and why would you want them
to affect picking (other than design completeness :-) )?
-rg
On Feb 17, 1:50am, Florian Schroecker wrote:
> Subject: Picking with C3F_V3F
> Hi!
>
> I'm having a problem while using the
> voGeometryActions::pick() method. It works fine
> when I use V3F as interleavedArrayFormat, but on other
> formats (e.g. T3F_V3F or C3F_V3F) I get the following error:
>
> voGeometryActions::pick() : Unsuported interleavedArrayFormat
>
> It seems as if pick is only implemented for V3F?
> Is there going to be a future support for C3F_V3F or T3F_V3F?
>
> It would also be interesting to have a pick method that
> takes a general ray as parameters (instead of viewport,position,
> model and projectionMatrix). Maybe this could be implemented in
> a future Volumizer version? Right now we simulate such a ray
> by calculating the correct model and projection matrix for
> our ray parameters.
>
> thanks in advance, Florian
>
> ---------------------------------------------------------------
> Florian Schroecker
> TU Braunschweig
> Institute for Medical Informatics
>
> ______________________________________________________
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>-- End of excerpt from Florian Schroecker
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