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- Implemented r_linearsky for dual-layer skies

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This commit is contained in:
raa-eruanna 2016-10-12 14:37:57 -04:00
parent b5b96ee222
commit fbbdd403f1
1 changed files with 13 additions and 3 deletions
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16
src/r_plane.cpp
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@ -888,9 +888,19 @@ static const BYTE *R_GetOneSkyColumn (FTexture *fronttex, int x)
// Get a column of sky when there are two overlapping sky textures
static const BYTE *R_GetTwoSkyColumns (FTexture *fronttex, int x)
{
DWORD ang = (skyangle + xtoviewangle[x]) ^ skyflip;
DWORD angle1 = (DWORD)((UMulScale16(ang, frontcyl) + frontpos) >> FRACBITS);
DWORD angle2 = (DWORD)((UMulScale16(ang, backcyl) + backpos) >> FRACBITS);
DWORD ang, angle1, angle2 = (DWORD)((UMulScale16(ang, backcyl) + backpos) >> FRACBITS);
if (r_linearsky)
{
angle_t xangle = (angle_t)((0.5 - x / (double)viewwidth) * FocalTangent * ANGLE_90);
ang = (skyangle + xangle) ^ skyflip;
}
else
{
ang = (skyangle + xtoviewangle[x]) ^ skyflip;
}
angle1 = (DWORD)((UMulScale16(ang, frontcyl) + frontpos) >> FRACBITS);
angle2 = (DWORD)((UMulScale16(ang, backcyl) + backpos) >> FRACBITS);
// Check if this column has already been built. If so, there's
// no reason to waste time building it again.