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rework to actually work

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This commit is contained in:
Jaklyy 2024-02-10 20:54:35 -05:00
parent f4bae5a5d5
commit 2c457de681
1 changed files with 23 additions and 20 deletions
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43
src/GPU3D_Soft.h
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@ -180,37 +180,40 @@ private:
{
// Z-buffering: linear interpolation
// still doesn't quite match hardware...
s32 base = 0, disp = 0, factor = 0;
s32 disp = 0;
if (z0 < z1)
{
base = z0;
disp = z1 - z0;
factor = x;
}
else
{
base = z1;
disp = z0 - z1,
factor = xdiff - x;
disp = z0 - z1;
}
/*
if (dir)
/*if (dir)
{
return base + disp * factor / xdiff;
if (z0 < z1) return z0 + ((z1 - z0) * x / xdiff);
else return z1 + ((z0 - z1) - ((z0 - z1) * x / xdiff));
}*/
u32 recip, recip2;
u32 shift = 0;
recip2 = recip = (x << 16) / xdiff;
while (recip2 > 0x100)
{
recip2 >>= 1;
shift++;
}
else*/
disp >>= shift;
if (z0 < z1)
{
u32 recip, recip2;
u32 shift = 0;
recip2 = recip = (factor << 16) / xdiff;
while (recip2 > 0x100)
{
recip2 >>= 1;
shift++;
}
disp >>= shift;
return base + ((disp * recip) >> (16 - shift));
return z0 + ((disp * recip) >> (16 - shift));
}
else
{
return z1 + ((z0-z1) - ((disp * recip) >> (16 - shift)));
}
}
}