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Remove yslope loopup table and StepColumn

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This commit is contained in:
Magnus Norddahl 2017-02-06 15:15:09 +01:00
parent 942f90a759
commit 7e6c91d73c
6 changed files with 32 additions and 86 deletions
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96
src/swrenderer/plane/r_flatplane.cpp
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@ -64,22 +64,20 @@ namespace swrenderer
double xstep, ystep, leftxfrac, leftyfrac, rightxfrac, rightyfrac;
double x;
xscale = xs_ToFixed(32 - drawerargs.TextureWidthBits(), _xscale);
yscale = xs_ToFixed(32 - drawerargs.TextureHeightBits(), _yscale);
if (planeang != 0)
{
double cosine = cos(planeang), sine = sin(planeang);
pviewx = FLOAT2FIXED(pl->xform.xOffs + ViewPos.X * cosine - ViewPos.Y * sine);
pviewy = FLOAT2FIXED(pl->xform.yOffs - ViewPos.X * sine - ViewPos.Y * cosine);
pviewx = pl->xform.xOffs + ViewPos.X * cosine - ViewPos.Y * sine;
pviewy = pl->xform.yOffs - ViewPos.X * sine - ViewPos.Y * cosine;
}
else
{
pviewx = FLOAT2FIXED(pl->xform.xOffs + ViewPos.X);
pviewy = FLOAT2FIXED(pl->xform.yOffs - ViewPos.Y);
pviewx = pl->xform.xOffs + ViewPos.X;
pviewy = pl->xform.yOffs - ViewPos.Y;
}
pviewx = FixedMul(xscale, pviewx);
pviewy = FixedMul(yscale, pviewy);
pviewx = _xscale * pviewx;
pviewy = _yscale * pviewy;
// left to right mapping
planeang += (ViewAngle - 90).Radians();
@ -100,17 +98,19 @@ namespace swrenderer
planeang += M_PI / 2;
double cosine = cos(planeang), sine = -sin(planeang);
x = pl->right - centerx - 0.5;
x = pl->right - viewport->CenterX - 0.5;
rightxfrac = _xscale * (cosine + x * xstep);
rightyfrac = _yscale * (sine + x * ystep);
x = pl->left - centerx - 0.5;
x = pl->left - viewport->CenterX + 0.5;
leftxfrac = _xscale * (cosine + x * xstep);
leftyfrac = _yscale * (sine + x * ystep);
basexfrac = rightxfrac;
baseyfrac = rightyfrac;
xstepscale = (rightxfrac - leftxfrac) / (pl->right - pl->left);
ystepscale = (rightyfrac - leftyfrac) / (pl->right - pl->left);
basexfrac = leftxfrac;
baseyfrac = leftyfrac;
xstepscale = (rightxfrac - leftxfrac) / (pl->right - pl->left + 1);
ystepscale = (rightyfrac - leftyfrac) / (pl->right - pl->left + 1);
minx = pl->left;
planeheight = fabs(pl->height.Zat0() - ViewPos.Z);
@ -143,8 +143,6 @@ namespace swrenderer
void RenderFlatPlane::RenderLine(int y, int x1, int x2)
{
double distance;
#ifdef RANGECHECK
if (x2 < x1 || x1<0 || x2 >= viewwidth || (unsigned)y >= (unsigned)viewheight)
{
@ -152,15 +150,17 @@ namespace swrenderer
}
#endif
// [RH] Notice that I dumped the caching scheme used by Doom.
// It did not offer any appreciable speedup.
auto viewport = RenderViewport::Instance();
distance = planeheight * yslope[y];
double curxfrac = basexfrac + xstepscale * (x1 + 0.5 - minx);
double curyfrac = baseyfrac + ystepscale * (x1 + 0.5 - minx);
double distance = viewport->PlaneDepth(y, planeheight);
if (drawerargs.TextureWidthBits() != 0)
{
drawerargs.SetTextureUStep(xs_ToFixed(32 - drawerargs.TextureWidthBits(), distance * xstepscale));
drawerargs.SetTextureUPos(xs_ToFixed(32 - drawerargs.TextureWidthBits(), distance * basexfrac) + pviewx);
drawerargs.SetTextureUPos(xs_ToFixed(32 - drawerargs.TextureWidthBits(), distance * curxfrac + pviewx));
}
else
{
@ -171,7 +171,7 @@ namespace swrenderer
if (drawerargs.TextureHeightBits() != 0)
{
drawerargs.SetTextureVStep(xs_ToFixed(32 - drawerargs.TextureHeightBits(), distance * ystepscale));
drawerargs.SetTextureVPos(xs_ToFixed(32 - drawerargs.TextureHeightBits(), distance * baseyfrac) + pviewy);
drawerargs.SetTextureVPos(xs_ToFixed(32 - drawerargs.TextureHeightBits(), distance * curyfrac + pviewy));
}
else
{
@ -179,11 +179,9 @@ namespace swrenderer
drawerargs.SetTextureVPos(0);
}
auto viewport = RenderViewport::Instance();
if (viewport->RenderTarget->IsBgra())
{
double distance2 = planeheight * yslope[(y + 1 < viewheight) ? y + 1 : y - 1];
double distance2 = viewport->PlaneDepth(y + 1, planeheight);
double xmagnitude = fabs(ystepscale * (distance2 - distance) * viewport->FocalLengthX);
double ymagnitude = fabs(xstepscale * (distance2 - distance) * viewport->FocalLengthX);
double magnitude = MAX(ymagnitude, xmagnitude);
@ -268,56 +266,6 @@ namespace swrenderer
drawerargs.DrawSpan(Thread);
}
void RenderFlatPlane::StepColumn()
{
basexfrac -= xstepscale;
baseyfrac -= ystepscale;
}
void RenderFlatPlane::SetupSlope()
{
auto viewport = RenderViewport::Instance();
int i = 0;
int e = viewheight;
float focus = float(viewport->FocalLengthY);
float den;
float cy = float(viewport->CenterY);
if (i < centery)
{
den = cy - i - 0.5f;
if (e <= centery)
{
do {
yslope[i] = focus / den;
den -= 1;
} while (++i < e);
}
else
{
do {
yslope[i] = focus / den;
den -= 1;
} while (++i < centery);
den = i - cy + 0.5f;
do {
yslope[i] = focus / den;
den += 1;
} while (++i < e);
}
}
else
{
den = i - cy + 0.5f;
do {
yslope[i] = focus / den;
den += 1;
} while (++i < e);
}
}
float RenderFlatPlane::yslope[MAXHEIGHT];
/////////////////////////////////////////////////////////////////////////
RenderColoredPlane::RenderColoredPlane(RenderThread *thread)

9
src/swrenderer/plane/r_flatplane.h
View file

@ -27,28 +27,23 @@ namespace swrenderer
RenderFlatPlane(RenderThread *thread);
void Render(VisiblePlane *pl, double _xscale, double _yscale, fixed_t alpha, bool additive, bool masked, FDynamicColormap *basecolormap, FTexture *texture);
static void SetupSlope();
RenderThread *Thread = nullptr;
private:
void RenderLine(int y, int x1, int x2) override;
void StepColumn() override;
int minx;
double planeheight;
bool plane_shade;
int planeshade;
double GlobVis;
FDynamicColormap *basecolormap;
fixed_t pviewx, pviewy;
fixed_t xscale, yscale;
double pviewx, pviewy;
double xstepscale, ystepscale;
double basexfrac, baseyfrac;
VisiblePlaneLight *light_list;
SpanDrawerArgs drawerargs;
static float yslope[MAXHEIGHT];
};
class RenderColoredPlane : PlaneRenderer

2
src/swrenderer/plane/r_planerenderer.cpp
View file

@ -85,8 +85,6 @@ namespace swrenderer
t2 = pl->top[x];
b2 = pl->bottom[x];
StepColumn();
}
// Draw any spans that are still open
while (t2 < b2)

1
src/swrenderer/plane/r_planerenderer.h
View file

@ -26,7 +26,6 @@ namespace swrenderer
void RenderLines(VisiblePlane *pl);
virtual void RenderLine(int y, int x1, int x2) = 0;
virtual void StepColumn() { }
private:
short spanend[MAXHEIGHT];

2
src/swrenderer/viewport/r_viewport.cpp
View file

@ -130,8 +130,6 @@ namespace swrenderer
centery = xs_ToInt(CenterY);
globaluclip = -CenterY / InvZtoScale;
globaldclip = (viewheight - CenterY) / InvZtoScale;
RenderFlatPlane::SetupSlope();
}
void RenderViewport::SetupBuffer()

8
src/swrenderer/viewport/r_viewport.h
View file

@ -58,6 +58,14 @@ namespace swrenderer
DVector2 PointWorldToView(const DVector2 &worldPos) const;
DVector2 ScaleViewToScreen(const DVector2 &scale, double viewZ, bool pixelstretch = true) const;
double PlaneDepth(int screenY, double planeHeight) const
{
if (screenY + 0.5 < CenterY)
return FocalLengthY / (CenterY - screenY - 0.5) * planeHeight;
else
return FocalLengthY / (screenY + 0.5 - CenterY) * planeHeight;
}
private:
void InitTextureMapping();