From: Tomlinson, Gordon (GORDON.TOMLINSON++at++ca.com)
Date: 09/27/2001 09:25:35
Hi Dirk
I think you have to update the bounding box for ALL the geosets buffers
because they are fluxed and the bounding box is not valid for the other
geoset buffers
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 10:38 AM
To: Tomlinson, Gordon
Cc: info-performer++at++sgi.com
Subject: RE: isect
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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