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R_RenderSegLoop: fix FINETANGENT sometimes going out of bounds

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James R 2023-04-04 22:06:32 -07:00
parent 32ed5fe4ae
commit e5d51d5a31
1 changed files with 2 additions and 1 deletions
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3
src/r_segs.c
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@ -1451,7 +1451,8 @@ static void R_RenderSegLoop (void)
//SoM: Calculate offsets for Thick fake floors.
// calculate texture offset
angle = (rw_centerangle + xtoviewangle[viewssnum][rw_x])>>ANGLETOFINESHIFT;
texturecolumn = rw_offset-FixedMul(FINETANGENT(angle),rw_distance);
// Mask 4095 to guarantee this index is within bounds
texturecolumn = rw_offset-FixedMul(FINETANGENT(angle & 4095),rw_distance);
if (oldtexturecolumn != -1) {
rw_bottomtexturemid += FixedMul(rw_bottomtextureslide, oldtexturecolumn-texturecolumn);