From: Volodymyr Kindratenko (kindr++at++ncsa.uiuc.edu)
Date: 10/23/2003 15:11:15
Paolo:
Thank you!!! texture->setFilter(PFTEX_MINFILTER, PFTEX_BILINEAR) does the
trick.
Volodymyr
> -----Original Message-----
> From: Paolo Farinelli [mailto:paolo++at++sgi.com]
> Sent: Thursday, October 23, 2003 4:20 PM
> To: Volodymyr Kindratenko
> Cc: info-performer++at++sgi.com
> Subject: Re: [info-performer] pfTexture/pfTexEnv problem
>
>
> Hi Volodymyr,
>
> Looks like only the highest resolution mip level of your
> texture contains valid data.
>
> Try explicitely setting a minfilter which does not use
> mipmap levels by adding the line:
>
> texture->setFormat(PFTEX_MINFILTER, PFTEX_BILINEAR);
>
>
> Hope this helps.
> Regards,
> Paolo
>
>
>
> Volodymyr Kindratenko wrote:
>
> >Hi:
> >
> >I am developing a virtual mirror (scene rendered in a
> separate channel
> >and then uploaded as a texture to a polygon in the channel's draw
> >callback). It seems to be working, but...
> >
> >When I look at the resulting mirror from a short distance,
> it looks OK:
> >
> >http://moneypenny.ncsa.uiuc.edu/temp/mirror/1.jpg
> >
> >When I start moving away from the mirror, the texture is
> combined with
> >the color of the base texture set by
> >
> >texture->setImage((uint*)pfMalloc(comp*ns*nt*nr), comp, ns, nt, nr);
> >
> >http://moneypenny.ncsa.uiuc.edu/temp/mirror/2.jpg
> >
> >Eventually, only the base texture color remains as I move far away:
> >
> >http://moneypenny.ncsa.uiuc.edu/temp/mirror/3.jpg
> >
> >pfTexEnv mode is set to PFTE_REPLACE
> >
> >What am I doing wrong? Which flags need to be set on
> pfTexEnv? Please
> >help! Here is the code that creates the texture:
> >
> > // texture
> > int comp=4, ns=128, nt=128, nr=1;
> > pfTexture *texture = new pfTexture;
> > texture->setFormat(PFTEX_IMAGE_FORMAT, PFTEX_RGBA); //
> standard format
> > texture->setFormat(PFTEX_SUBLOAD_FORMAT, PF_ON);
> > texture->setImage((uint*)pfMalloc(comp*ns*nt*nr), comp, ns, nt, nr);
> >
> > // texture environment
> > pfTexEnv *texenv = new pfTexEnv; texenv->setMode(PFTE_REPLACE);
> >
> > // geostate
> > pfGeoState *geostate = new pfGeoState;
> > geostate->setMode(PFSTATE_CULLFACE, PFCF_OFF);
> > geostate->setMode(PFSTATE_TRANSPARENCY, PFTR_OFF);
> > geostate->setMode(PFSTATE_ENTEXTURE, PF_ON);
> > geostate->setAttr(PFSTATE_TEXTURE, texture);
> > geostate->setAttr(PFSTATE_TEXENV, texenv);
> >
> > geoset->setGState(geostate);
> >
> >
> >
> >Volodymyr
> >
> >*
> >___________________________________________________________
> >Dr. Volodymyr Kindratenko ............. kindr++at++ncsa.uiuc.edu
> >
> > National Center for Supercomputing Applications (NCSA)
> > University of Illinois, Urbana tel: 217-265-0209
> > M/C 476 - 152 CAB lab: 217-244-4913
> > 605 East Springfield Avenue fax: 217-244-2909
> > Champaign, IL 61820
> > http://www.ncsa.uiuc.edu/~kindr
> > http://intellibadge.ncsa.uiuc.edu
> >___________________________________________________________
> >*
> >
> >
> >
> >-------------------------------------------------------------
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> >
> >
> >
>
>
> --
> Paolo Farinelli
> paolo++at++sgi.com
> Member of Technical Staff, OpenGL Performer
> 1-650-933-1808
> Silicon Graphics 1600 Amphitheatre Pkwy, Mountain
> View, CA 94043
>
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