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Fix up/down culling issue

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This commit is contained in:
Magnus Norddahl 2016-12-03 05:02:34 +01:00
parent ce6e1e1e47
commit 04e981dba0
3 changed files with 29 additions and 11 deletions
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23
src/r_poly_cull.cpp
View file

@ -93,7 +93,7 @@ void PolyCull::CullSubsector(subsector_t *sub)
continue;
int sx1, sx2;
if (GetSegmentRangeForLine(line->v1->fX(), line->v1->fY(), line->v2->fX(), line->v2->fY(), sx1, sx2))
if (GetSegmentRangeForLine(line->v1->fX(), line->v1->fY(), line->v2->fX(), line->v2->fY(), sx1, sx2) == LineSegmentRange::HasSegment)
{
MarkSegmentCulled(sx1, sx2);
}
@ -200,7 +200,8 @@ bool PolyCull::CheckBBox(float *bspcoord)
float x2 = bspcoord[lines[i][2]];
float y2 = bspcoord[lines[i][3]];
int sx1, sx2;
if (GetSegmentRangeForLine(x1, y1, x2, y2, sx1, sx2))
LineSegmentRange result = GetSegmentRangeForLine(x1, y1, x2, y2, sx1, sx2);
if (result == LineSegmentRange::HasSegment)
{
if (foundline)
{
@ -214,6 +215,10 @@ bool PolyCull::CheckBBox(float *bspcoord)
foundline = true;
}
}
else if (result == LineSegmentRange::AlwaysVisible)
{
return true;
}
}
if (!foundline)
return false;
@ -221,13 +226,14 @@ bool PolyCull::CheckBBox(float *bspcoord)
return !IsSegmentCulled(minsx1, maxsx2);
}
bool PolyCull::GetSegmentRangeForLine(double x1, double y1, double x2, double y2, int &sx1, int &sx2) const
LineSegmentRange PolyCull::GetSegmentRangeForLine(double x1, double y1, double x2, double y2, int &sx1, int &sx2) const
{
double znear = 5.0;
double updownnear = -400.0;
// Cull if entirely behind the portal clip plane (tbd: should we clip the segment?)
if (Vec4f::dot(PortalClipPlane, Vec4f((float)x1, (float)y1, 0.0f, 1.0f)) < 0.0f && Vec4f::dot(PortalClipPlane, Vec4f((float)x2, (float)y2, 0.0f, 1.0f)) < 0.0f)
return false;
return LineSegmentRange::NotVisible;
// Transform to 2D view space:
x1 = x1 - ViewPos.X;
@ -239,8 +245,13 @@ bool PolyCull::GetSegmentRangeForLine(double x1, double y1, double x2, double y2
double ry1 = x1 * ViewCos + y1 * ViewSin;
double ry2 = x2 * ViewCos + y2 * ViewSin;
// Is it potentially visible when looking straight up or down?
if (!(ry1 < updownnear && ry2 < updownnear) && !(ry1 > znear && ry2 > znear))
return LineSegmentRange::AlwaysVisible;
// Cull if line is entirely behind view
if (ry1 < znear && ry2 < znear) return false;
if (ry1 < znear && ry2 < znear)
return LineSegmentRange::NotVisible;
// Clip line, if needed
double t1 = 0.0f, t2 = 1.0f;
@ -265,5 +276,5 @@ bool PolyCull::GetSegmentRangeForLine(double x1, double y1, double x2, double y2
if (sx1 > sx2)
std::swap(sx1, sx2);
return sx1 != sx2;
return (sx1 != sx2) ? LineSegmentRange::HasSegment : LineSegmentRange::AlwaysVisible;
}

9
src/r_poly_cull.h
View file

@ -25,12 +25,19 @@
#include "r_poly_triangle.h"
#include "r_poly_intersection.h"
enum class LineSegmentRange
{
NotVisible,
HasSegment,
AlwaysVisible
};
class PolyCull
{
public:
void CullScene(const TriMatrix &worldToClip, const Vec4f &portalClipPlane);
bool GetSegmentRangeForLine(double x1, double y1, double x2, double y2, int &sx1, int &sx2) const;
LineSegmentRange GetSegmentRangeForLine(double x1, double y1, double x2, double y2, int &sx1, int &sx2) const;
void MarkSegmentCulled(int x1, int x2);
bool IsSegmentCulled(int x1, int x2) const;

8
src/r_poly_portal.cpp
View file

@ -174,12 +174,12 @@ void RenderPolyPortal::RenderLine(subsector_t *sub, seg_t *line, sector_t *front
// Cull wall if not visible
int sx1, sx2;
bool hasSegmentRange = Cull.GetSegmentRangeForLine(line->v1->fX(), line->v1->fY(), line->v2->fX(), line->v2->fY(), sx1, sx2);
if (!hasSegmentRange || Cull.IsSegmentCulled(sx1, sx2))
LineSegmentRange segmentRange = Cull.GetSegmentRangeForLine(line->v1->fX(), line->v1->fY(), line->v2->fX(), line->v2->fY(), sx1, sx2);
if (segmentRange == LineSegmentRange::NotVisible || (segmentRange == LineSegmentRange::HasSegment && Cull.IsSegmentCulled(sx1, sx2)))
return;
// Tell automap we saw this
if (!swrenderer::r_dontmaplines && line->linedef)
if (!swrenderer::r_dontmaplines && line->linedef && segmentRange != LineSegmentRange::AlwaysVisible)
{
line->linedef->flags |= ML_MAPPED;
sub->flags |= SSECF_DRAWN;
@ -201,7 +201,7 @@ void RenderPolyPortal::RenderLine(subsector_t *sub, seg_t *line, sector_t *front
// Render wall, and update culling info if its an occlusion blocker
if (RenderPolyWall::RenderLine(WorldToClip, PortalPlane, line, frontsector, subsectorDepth, StencilValue, TranslucentObjects, LinePortals))
{
if (hasSegmentRange)
if (segmentRange == LineSegmentRange::HasSegment)
Cull.MarkSegmentCulled(sx1, sx2);
}
}