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https://github.com/ZDoom/gzdoom-gles.git
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Fix up/down culling issue
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parent
ce6e1e1e47
commit
04e981dba0
3 changed files with 29 additions and 11 deletions
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@ -93,7 +93,7 @@ void PolyCull::CullSubsector(subsector_t *sub)
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continue;
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int sx1, sx2;
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if (GetSegmentRangeForLine(line->v1->fX(), line->v1->fY(), line->v2->fX(), line->v2->fY(), sx1, sx2))
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if (GetSegmentRangeForLine(line->v1->fX(), line->v1->fY(), line->v2->fX(), line->v2->fY(), sx1, sx2) == LineSegmentRange::HasSegment)
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{
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MarkSegmentCulled(sx1, sx2);
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}
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@ -200,7 +200,8 @@ bool PolyCull::CheckBBox(float *bspcoord)
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float x2 = bspcoord[lines[i][2]];
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float y2 = bspcoord[lines[i][3]];
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int sx1, sx2;
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if (GetSegmentRangeForLine(x1, y1, x2, y2, sx1, sx2))
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LineSegmentRange result = GetSegmentRangeForLine(x1, y1, x2, y2, sx1, sx2);
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if (result == LineSegmentRange::HasSegment)
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{
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if (foundline)
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{
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@ -214,6 +215,10 @@ bool PolyCull::CheckBBox(float *bspcoord)
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foundline = true;
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}
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}
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else if (result == LineSegmentRange::AlwaysVisible)
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{
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return true;
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}
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}
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if (!foundline)
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return false;
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@ -221,13 +226,14 @@ bool PolyCull::CheckBBox(float *bspcoord)
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return !IsSegmentCulled(minsx1, maxsx2);
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}
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bool PolyCull::GetSegmentRangeForLine(double x1, double y1, double x2, double y2, int &sx1, int &sx2) const
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LineSegmentRange PolyCull::GetSegmentRangeForLine(double x1, double y1, double x2, double y2, int &sx1, int &sx2) const
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{
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double znear = 5.0;
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double updownnear = -400.0;
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// Cull if entirely behind the portal clip plane (tbd: should we clip the segment?)
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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)
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return false;
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return LineSegmentRange::NotVisible;
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// Transform to 2D view space:
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x1 = x1 - ViewPos.X;
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@ -239,8 +245,13 @@ bool PolyCull::GetSegmentRangeForLine(double x1, double y1, double x2, double y2
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double ry1 = x1 * ViewCos + y1 * ViewSin;
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double ry2 = x2 * ViewCos + y2 * ViewSin;
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// Is it potentially visible when looking straight up or down?
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if (!(ry1 < updownnear && ry2 < updownnear) && !(ry1 > znear && ry2 > znear))
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return LineSegmentRange::AlwaysVisible;
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// Cull if line is entirely behind view
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if (ry1 < znear && ry2 < znear) return false;
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if (ry1 < znear && ry2 < znear)
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return LineSegmentRange::NotVisible;
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// Clip line, if needed
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double t1 = 0.0f, t2 = 1.0f;
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@ -265,5 +276,5 @@ bool PolyCull::GetSegmentRangeForLine(double x1, double y1, double x2, double y2
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if (sx1 > sx2)
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std::swap(sx1, sx2);
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return sx1 != sx2;
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return (sx1 != sx2) ? LineSegmentRange::HasSegment : LineSegmentRange::AlwaysVisible;
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}
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@ -25,12 +25,19 @@
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#include "r_poly_triangle.h"
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#include "r_poly_intersection.h"
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enum class LineSegmentRange
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{
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NotVisible,
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HasSegment,
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AlwaysVisible
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};
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class PolyCull
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{
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public:
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void CullScene(const TriMatrix &worldToClip, const Vec4f &portalClipPlane);
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bool GetSegmentRangeForLine(double x1, double y1, double x2, double y2, int &sx1, int &sx2) const;
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LineSegmentRange GetSegmentRangeForLine(double x1, double y1, double x2, double y2, int &sx1, int &sx2) const;
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void MarkSegmentCulled(int x1, int x2);
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bool IsSegmentCulled(int x1, int x2) const;
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@ -174,12 +174,12 @@ void RenderPolyPortal::RenderLine(subsector_t *sub, seg_t *line, sector_t *front
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// Cull wall if not visible
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int sx1, sx2;
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bool hasSegmentRange = Cull.GetSegmentRangeForLine(line->v1->fX(), line->v1->fY(), line->v2->fX(), line->v2->fY(), sx1, sx2);
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if (!hasSegmentRange || Cull.IsSegmentCulled(sx1, sx2))
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LineSegmentRange segmentRange = Cull.GetSegmentRangeForLine(line->v1->fX(), line->v1->fY(), line->v2->fX(), line->v2->fY(), sx1, sx2);
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if (segmentRange == LineSegmentRange::NotVisible || (segmentRange == LineSegmentRange::HasSegment && Cull.IsSegmentCulled(sx1, sx2)))
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return;
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// Tell automap we saw this
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if (!swrenderer::r_dontmaplines && line->linedef)
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if (!swrenderer::r_dontmaplines && line->linedef && segmentRange != LineSegmentRange::AlwaysVisible)
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{
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line->linedef->flags |= ML_MAPPED;
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sub->flags |= SSECF_DRAWN;
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@ -201,7 +201,7 @@ void RenderPolyPortal::RenderLine(subsector_t *sub, seg_t *line, sector_t *front
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// Render wall, and update culling info if its an occlusion blocker
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if (RenderPolyWall::RenderLine(WorldToClip, PortalPlane, line, frontsector, subsectorDepth, StencilValue, TranslucentObjects, LinePortals))
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{
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if (hasSegmentRange)
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if (segmentRange == LineSegmentRange::HasSegment)
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Cull.MarkSegmentCulled(sx1, sx2);
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}
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}
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