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- Fix plane pixel center sampling bug

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This commit is contained in:
Magnus Norddahl 2017-07-22 12:29:46 +02:00
parent 3ff021608d
commit 8311a18282
1 changed files with 13 additions and 5 deletions
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18
src/swrenderer/plane/r_flatplane.cpp
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@ -108,7 +108,7 @@ namespace swrenderer
planeang += M_PI / 2;
double cosine = cos(planeang), sine = -sin(planeang);
x = pl->right - viewport->CenterX - 0.5;
x = pl->right - viewport->CenterX + 0.5;
rightxfrac = _xscale * (cosine + x * xstep);
rightyfrac = _yscale * (sine + x * ystep);
x = pl->left - viewport->CenterX + 0.5;
@ -117,8 +117,16 @@ namespace swrenderer
basexfrac = leftxfrac;
baseyfrac = leftyfrac;
xstepscale = (rightxfrac - leftxfrac) / (pl->right - pl->left + 1);
ystepscale = (rightyfrac - leftyfrac) / (pl->right - pl->left + 1);
if (pl->left != pl->right)
{
xstepscale = (rightxfrac - leftxfrac) / (pl->right - pl->left);
ystepscale = (rightyfrac - leftyfrac) / (pl->right - pl->left);
}
else
{
xstepscale = 0;
ystepscale = 0;
}
minx = pl->left;
@ -166,8 +174,8 @@ namespace swrenderer
auto viewport = Thread->Viewport.get();
double curxfrac = basexfrac + xstepscale * (x1 + 0.5 - minx);
double curyfrac = baseyfrac + ystepscale * (x1 + 0.5 - minx);
double curxfrac = basexfrac + xstepscale * (x1 - minx);
double curyfrac = baseyfrac + ystepscale * (x1 - minx);
double distance = viewport->PlaneDepth(y, planeheight);