| Re: pickdata and select again.... [message #25561] |
Mon, 25 June 2001 22:35 |
Rick Towler
Messages: 821
Registered: August 1998
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Senior Member |
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As Mark suggested, maybe you can provide some more details?
I played around with this a little bit with texture mapped polygons. I even
threw in a semi-transparent polygon to trick it but to no avail. As far as I
can tell pickdata is returning sane results. How far off are your values
and what are your view settings? How are you using the pickdata method?
-Rick
"Richard Tyc" <richt@sbrc.umanitoba.ca> wrote in message
news:9h7nns$t27$1@canopus.cc.umanitoba.ca...
> OK, I am at this problem again with a little more understanding and more
> time to look for solutions.
> I think I understand the use of select (isolate which objects you have
> selected) and pickdata (get xyz data of object based on screen location
and
> zbuffer data). I did look at Randall Frank's solution of using mask
objects
> at key locations (eq. end of a line) to force selection and not rely on
xyz
> data from pickdata.
>
> But I want to do more...
> Q. Is there a way to select anywhere on a texture mapped IDLgrPolygon
object
> to retrieve a 3D location of the current mouse position ? pickdata seems
to
> choke on this providing unrealistic xyz data. Am I asking for too much ?
>
> Rich
>
>
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| Re: pickdata and select again.... [message #25569 is a reply to message #25561] |
Mon, 25 June 2001 15:14  |
m.hadfield
Messages: 36
Registered: April 2001
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Member |
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From: "Richard Tyc" <richt@sbrc.umanitoba.ca>
> Q. Is there a way to select anywhere on a texture mapped IDLgrPolygon
object
> to retrieve a 3D location of the current mouse position ? pickdata seems
to
> choke on this providing unrealistic xyz data. Am I asking for too much ?
Hmmm...it works for me. That is, I just ran one of my example programs with
various implementations of a coloured surface (multi-cell IDLgrPolygon,
multi-cell IDLgrSurface, single-cell IDLgrPolygon with texture-map image)
and Pickdata seems to report reasonable (x,y,z) data on all of them.
You should expect the same results with the texture-map in place as without.
What specifically is the problem?
---
Mark Hadfield
m.hadfield@niwa.cri.nz http://katipo.niwa.cri.nz/~hadfield
National Institute for Water and Atmospheric Research
--
Posted from clam.niwa.cri.nz [202.36.29.1]
via Mailgate.ORG Server - http://www.Mailgate.ORG
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