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Fix R_DrawColumnShadowed_8 crash encountered in FuriousFox's map

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If you want more specifics, sloped FOFs are to blame it turns out: sometimes the bottom of an FOF wall blocking a segment of an in-level wall column can be considered ABOVE the top part of the FOF there (yikes), and then the dc_y* values go offscreen, and then BOOM
This commit is contained in:
Monster Iestyn 2016-07-24 18:54:01 +01:00
parent 03ddc1f29a
commit dc765cde2c
1 changed files with 12 additions and 0 deletions
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12
src/r_draw8.c
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@ -1363,7 +1363,19 @@ void R_DrawColumnShadowed_8(void)
height = dc_lightlist[i].height >> LIGHTSCALESHIFT;
if (solid)
{
bheight = dc_lightlist[i].botheight >> LIGHTSCALESHIFT;
if (bheight < height)
{
// confounded slopes sometimes allow partial invertedness,
// even including cases where the top and bottom heights
// should actually be the same!
// swap the height values as a workaround for this quirk
INT32 temp = height;
height = bheight;
bheight = temp;
}
}
if (height <= dc_yl)
{
dc_colormap = dc_lightlist[i].rcolormap;