Re: Sharing Geometries

New Message Reply Date view Thread view Subject view Author view

Jean-Luc Dery (dery++at++discreet.com)
Wed, 23 Dec 1998 16:16:47 -0500

On Dec 23, 3:29pm, Prakash Mahesh wrote:
> Subject: Re: Sharing Geometries
> And here is how my nodes are :
>
> pfGeoState1 pfGeoState2
> \ /
> pfGeode
> |
> pfGeoSet
>
> If I don't do a geoset->setGState, is there a way to let pf know that I
> want to use the attributes of pfGeoState1 while it renders the first
> geoset and pfGeoState2 while it renders the same geoset again (say these
> are translated using a pfDCS)?

The only way I can think off is by having a pfGeode predraw callback and by
managing states and drawing within it.

pfGeoState::apply - 1
pfGeoSet::draw
pfGeoState::apply - 2
pfGeoSet::draw
prune draw traversal (you did the job from the callback)

But as I have mentioned in an other mail, you will surely have problems with PF
sorting your geometry according to their graphics state (geostate). You can get
rid of this by disabling cull sorting (but you loose gfx state optimisation).

You might be able to do this with the first pass done normally for state 1 (set
withinf pfGeoSet) and by doing the second pass in a postdraw callback which
would apply second state and force redraw of geometry set(s). Maybe this would
allow you to keep cull sorting active, but I've never tried that.

Hope I got you right and that this can help,

Jean-Luc

-- 
_____________________________________________________________________________


Jean-Luc Dery                         Discreet Logic
Technical Leader                      10 Duke Street
3-D Graphics Technology and           Montreal (Quebec), Canada, H3C 2L7
Realtime Systems                      Tel: (514) 954-7239
Email: jean-lucD++at++discreet.com         Fax: (514) 393-0110
_____________________________________________________________________________

New Message Reply Date view Thread view Subject view Author view

This archive was generated by hypermail 2.0b2 on Wed Dec 23 1998 - 13:17:03 PST

This message has been cleansed for anti-spam protection. Replace '++at++' in any mail addresses with the '@' symbol.