Environment Texture Mapping bug on importing Inventor Geometries

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Guenter Schreiber (Guenter.Schreiber++at++dlr.de)
Thu, 18 Mar 1999 19:59:43 +0100

Hi pfAll,
Well, I am in deep trouble on importing my Inventor Files to Performer
while using Reflection Mapping textures.

Performer (perfly) randomly does Reflection Mapping on my Geometries.
Well I am using
Textures extensively, sometimes with reflection, sometimes without, so
maybe
this could be a problem ?
If performer accepts the reflection, it does reflection mapping each
triangle separately,
which not beautiful on triangulated surfaces.
I don't know any workaround.
Did anybody face the same problem ?
What can I Do ? Do I have to change the code of libpfiv ?
There are some callback routines, which do the reflection thing.
code snippet from
 /usr/share/Performer/src/lib/libpfdb/libpfiv/pfiv.C
 ...
if (node->getTypeId() ==
SoTextureCoordinateEnvironment::getClassTypeId())
    {
        cbd->parent->setTravFuncs(PFTRAV_DRAW,
                        enableSphereMap, disableSphereMap);
    }
..

int
enableSphereMap(pfTraverser *, void *)
{
#ifdef IRISGL
    texgen(TX_S, TG_SPHEREMAP, NULL);
    texgen(TX_T, TG_SPHEREMAP, NULL);
    texgen(TX_S, TG_ON, NULL);
    texgen(TX_T, TG_ON, NULL);
#else
    glTexGenf(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP );
    glTexGenf(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
    glEnable(GL_TEXTURE_GEN_S);
    glEnable(GL_TEXTURE_GEN_T);
#endif
    return PFTRAV_CONT;
}

int
disableSphereMap(pfTraverser *, void *)
{
#ifdef IRISGL
    texgen(TX_S, TG_OFF, NULL);
    texgen(TX_T, TG_OFF, NULL);
#else
    glDisable(GL_TEXTURE_GEN_S);
    glDisable(GL_TEXTURE_GEN_T);
#endif
    return PFTRAV_CONT;
}

Should this code be changed and pfTexEnv be utilized instead ?
Or do I have to set some additional graphics mode ?

Thanks in advance,

Günter

-- 
Enjoy life  --  enjoy juggling - God gave you that creativity.
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 ______________________________________________________________
| Dipl.-Ing. Günter Schreiber | phone: *49/*8153/28/1183       |
| German Aerospace Center     | fax:   *49/*8153/28/1134       |
| Institute for Robotics and  | email:                         |    /| 
|    System Dynamics          |  Guenter.Schreiber++at++dlr.de       
--------
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