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- Use tests less prone to overflow on very steep slopes when detecting which side of a plane

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the camera is on. Mostly, this means testing the distance of the camera to the plane rather
  than computing the plane's Z at the camera and comparing that with the camera's Z.

SVN r4220 (trunk)
This commit is contained in:
Randy Heit 2013-04-17 01:32:40 +00:00
commit a50e670c0c
6 changed files with 30 additions and 24 deletions
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2
src/r_plane.cpp
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@ -1697,7 +1697,7 @@ void R_DrawTiltedPlane (visplane_t *pl, fixed_t alpha, bool additive, bool maske
plane_sz[0] = -plane_sz[0];
}
planelightfloat = (r_TiltVisibility * lxscale * lyscale) / (float)(abs(pl->height.ZatPoint (viewx, viewy) - viewz));
planelightfloat = (r_TiltVisibility * lxscale * lyscale) / (fabs(pl->height.ZatPoint(FIXED2DBL(viewx), FIXED2DBL(viewy)) - FIXED2DBL(viewz))) / 65536.0;
if (pl->height.c > 0)
planelightfloat = -planelightfloat;