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- Added a negative yrepeat case to wallscan_np2() for upside-down non-power-of-2 textures. 

SVN r3975 (trunk)
This commit is contained in:
Randy Heit 2012-12-04 03:14:02 +00:00
parent a57c22981e
commit ea5d2346bf
1 changed files with 52 additions and 22 deletions
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74
src/r_segs.cpp
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@ -1295,37 +1295,67 @@ static void call_wallscan(int x1, int x2, short *uwal, short *dwal, fixed_t *swa
void wallscan_np2(int x1, int x2, short *uwal, short *dwal, fixed_t *swal, fixed_t *lwal, fixed_t yrepeat, fixed_t top, fixed_t bot, bool mask)
{
short *up = uwal;
if (r_np2)
if (!r_np2)
{
call_wallscan(x1, x2, uwal, dwal, swal, lwal, yrepeat, mask);
}
else
{
short most1[MAXWIDTH], most2[MAXWIDTH], most3[MAXWIDTH];
short *down;
short *up, *down;
fixed_t texheight = rw_pic->GetHeight() << FRACBITS;
fixed_t scaledtexheight = FixedDiv(texheight, yrepeat);
fixed_t partition = top - (top - FixedDiv(dc_texturemid, yrepeat) - viewz) % scaledtexheight;
fixed_t partition;
down = most1;
dc_texturemid = FixedMul(partition - viewz, yrepeat) + texheight;
while (partition > bot)
{
int j = OWallMost(most3, partition - viewz);
if (j != 3)
if (yrepeat >= 0)
{ // normal orientation: draw strips from top to bottom
partition = top - (top - FixedDiv(dc_texturemid, yrepeat) - viewz) % scaledtexheight;
up = uwal;
down = most1;
dc_texturemid = FixedMul(partition - viewz, yrepeat) + texheight;
while (partition > bot)
{
for (int j = x1; j <= x2; ++j)
int j = OWallMost(most3, partition - viewz);
if (j != 3)
{
down[j] = clamp (most3[j], up[j], dwal[j]);
for (int j = x1; j <= x2; ++j)
{
down[j] = clamp(most3[j], up[j], dwal[j]);
}
call_wallscan(x1, x2, up, down, swal, lwal, yrepeat, mask);
up = down;
down = (down == most1) ? most2 : most1;
}
call_wallscan(x1, x2, up, down, swal, lwal, yrepeat, mask);
up = down;
down = (down == most1) ? most2 : most1;
}
partition -= scaledtexheight;
dc_texturemid -= texheight;
}
partition -= scaledtexheight;
dc_texturemid -= texheight;
}
call_wallscan(x1, x2, up, dwal, swal, lwal, yrepeat, mask);
}
else
{ // upside down: draw strips from bottom to top
partition = bot - (bot - FixedDiv(dc_texturemid, yrepeat) - viewz) % scaledtexheight;
up = most1;
down = dwal;
dc_texturemid = FixedMul(partition - viewz, yrepeat) + texheight;
while (partition < top)
{
int j = OWallMost(most3, partition - viewz);
if (j != 12)
{
for (int j = x1; j <= x2; ++j)
{
up[j] = clamp(most3[j], uwal[j], down[j]);
}
call_wallscan(x1, x2, up, down, swal, lwal, yrepeat, mask);
down = up;
up = (up == most1) ? most2 : most1;
}
partition -= scaledtexheight;
dc_texturemid -= texheight;
}
call_wallscan(x1, x2, uwal, down, swal, lwal, yrepeat, mask);
}
}
call_wallscan(x1, x2, up, dwal, swal, lwal, yrepeat, mask);
}
static void wallscan_np2_ds(drawseg_t *ds, int x1, int x2, short *uwal, short *dwal, fixed_t *swal, fixed_t *lwal, fixed_t yrepeat)