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Fix potential null pointer dereferences when rendering a model with no animations (?)

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git-svn-id: https://svn.eduke32.com/eduke32@6997 1a8010ca-5511-0410-912e-c29ae57300e0
This commit is contained in:
terminx 2018-10-07 05:19:55 +00:00
parent fbbaeff95a
commit 7eb3436bad
1 changed files with 9 additions and 10 deletions
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15
source/build/src/mdsprite.cpp
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@ -1105,16 +1105,12 @@ void updateanimation(md2model_t *m, const uspritetype *tspr, uint8_t lpal)
goto prep_return;
}
fps = smooth->mdsmooth ?
Blrintf((1.0f / ((float)tile2model[tile].smoothduration * (1.f / (float)UINT16_MAX))) * 66.f) :
anim->fpssc;
fps = smooth->mdsmooth ? Blrintf((1.0f / ((float)tile2model[tile].smoothduration * (1.f / (float)UINT16_MAX))) * 66.f) : anim ? anim->fpssc : 1;
i = (mdtims - sprext->mdanimtims) * ((fps * timerticspersec) / 120);
if (smooth->mdsmooth)
j = 65536;
else
j = ((anim->endframe+1-anim->startframe)<<16);
j = (smooth->mdsmooth || !anim) ? 65536 : ((anim->endframe + 1 - anim->startframe) << 16);
// XXX: Just in case you play the game for a VERY long time...
if (i < 0) { i = 0; sprext->mdanimtims = mdtims; }
//compare with j*2 instead of j to ensure i stays > j-65536 for MDANIM_ONESHOT
@ -1153,13 +1149,16 @@ void updateanimation(md2model_t *m, const uspritetype *tspr, uint8_t lpal)
}
else
{
if (anim)
m->cframe = (i>>16)+anim->startframe;
#ifdef DEBUGGINGAIDS
if (m->cframe >= m->numframes)
OSD_Printf("6: c > n\n");
#endif
m->nframe = m->cframe+1;
if (m->nframe > anim->endframe) // VERIFY: (!(r_animsmoothing && smooth->mdsmooth)) implies (anim!=NULL) ?
if (anim && m->nframe > anim->endframe) // VERIFY: (!(r_animsmoothing && smooth->mdsmooth)) implies (anim!=NULL) ?
m->nframe = anim->startframe;
smooth->mdoldframe = m->cframe;