From: Dirk Scheffter (scheff++at++iff.fhg.de)
Date: 09/27/2001 08:37:55
Hi Gordon,
thanks for the fast hint.
Unfortunately, it doesn't work.
I have now inserted a
pPfDCS->setBound(0, PFBOUND_DYNAMIC);
directly before
pPfDCS->isect()
but nothing changed.
(Remember, that culling is OK. Thus, bounding spheres should be OK, also.)
Greetings,
Dirk.
-----------------------------------------------------------
Dipl.-Inf. Dirk Scheffter scheff++at++iff.fhg.de
Fraunhofer IFF fon: +49 (0) 391/40 90-854
Sandtorstr. 22 fax: +49 (0) 391/40 90-870
D-39106 Magdeburg http://www2.iff.fhg.de/~scheff
Germany
-----------------------------------------------------------
On Thu, 27 Sep 2001, Tomlinson, Gordon wrote:
> HI Dirk
>
> Have you made the updating of the bounding spheres on all the parent
> groups and DCS' Dynamic..
>
> Or when you do a write complete force a bounding sphere update.
> Spheres are the first thing checked with itersections bounding boxes
> of geosets are only check if the sphere test is passed
>
> Regards
>
> Gordon.
> _________________________________________________________________
> Gordon Tomlinson
>
> Manager
> Urban Simulation Products Engineering.
>
> MultiGen-Paradigm
> "a Computer Associates Company"
> Suite 200, 16415 Addison Road, Addison, TX 75001 USA
>
> Tel: 972 380 9798 ext 309 Fax: 972 380 9468
>
> Email: gordon.tomlinson++at++ca.com
>
>
> -----Original Message-----
> From: Dirk Scheffter [mailto:scheff++at++iff.fhg.de]
> Sent: Thursday, September 27, 2001 7:49 AM
> To: info-performer++at++sgi.com
> Subject: isect
>
>
> pfHi there,
>
> I use fluxed geosets which I modify in my app.
> Geosets itself works correctly and are culled and displayed correctly.
>
> (I recompute bounding boxes of geosets before writeComplete.)
>
> But, I have extrem problems with intersection.
>
> I apply intersection to a DCS which has DCS children which have geode
> children which own the fluxed geosets.
> (Oops, example:
> (scene)
> DCS
> DCS
> geode
> fluxed geoset
> fluxed geoset
> ...
> geode
> fluxed geoset
> fluxed geoset
> ...
> DCS
> ...
> )
>
> The effect is that intersection works at initial appearance and in a
> certain circle(!) around it. This circle is smaller than the channel
> rectangle.
>
> I tried to uncache intersection:
>
> for all DCS nodes after creation I call:
> pPfDCS->setTravMask(PFTRAV_ISECT, PFIS_SET_PICK,
> PFTRAV_SELF | PFTRAV_DESCEND | PFTRAV_IS_UNCACHE, PF_SET);
>
> (This should include geodes, also, which are added before.)
>
> For all geosets after creation I call:
>
> pPfGSet->setIsectMask(PFIS_SET_PICK, PFTRAV_SELF | PFTRAV_IS_UNCACHE,
> PF_SET);
>
> (This is done in the Flux init callback.)
>
> Although I use isect class PFIS_SET_PICK I call pPfDCS->isect()
> which isn't a problem in my mind. (PFIS_SET_PICK is just only a certain
> value.)
>
> Well, and my intersection ray is as long as the far clip distance
> (1000m) and geometry appears rather close to near clip plane (1.5m).
>
> Is there anybody, knowing the effect resp. the trick to come around it
> resp. can enlight me?
>
> Best regards,
> Dirk.
>
> -----------------------------------------------------------
> Dipl.-Inf. Dirk Scheffter scheff++at++iff.fhg.de
> Fraunhofer IFF fon: +49 (0) 391/40 90-854
> Sandtorstr. 22 fax: +49 (0) 391/40 90-870
> D-39106 Magdeburg http://www2.iff.fhg.de/~scheff
> Germany
> -----------------------------------------------------------
>
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