void gl_RenderMissingLines()
{
for(int i=firstmissingseg;i<numsegs;i++)
{
seg_t * seg = &segs[i];
// This line has already been processed
if (seg->linedef->validcount==validcount) continue;
// Don't draw lines facing away from the viewer
divline_t dl = { seg->v1->x, seg->v1->y, seg->v2->x-seg->v1->x, seg->v2->y-seg->v1->y };
if (P_PointOnDivlineSide(viewx, viewy, &dl)) continue;
// Unfortunately there is no simple means to exclude lines here so we have
// to draw them all.
sector_t ffakesec, bfakesec;
sector_t * sector = gl_FakeFlat(seg->frontsector, &ffakesec, false);
sector_t * backsector;
if (seg->frontsector == seg->backsector) backsector=sector;
else if (!seg->backsector) backsector=NULL;
else backsector = gl_FakeFlat(seg->backsector, &bfakesec, true);
GLWall wall;
SetupWall.Start(true);
wall.Process(seg, sector, backsector, NULL);
rendered_lines++;
SetupWall.Stop(true);
}
}
static void AddLine (seg_t *seg,sector_t * sector,subsector_t * polysub)
{
angle_t startAngle, endAngle;
sector_t * backsector = NULL;
sector_t bs;
ClipWall.Clock();
if (GLPortal::mirrorline)
{
// this seg is completely behind the mirror!
if (P_PointOnLineSide(seg->v1->x, seg->v1->y, GLPortal::mirrorline) &&
P_PointOnLineSide(seg->v2->x, seg->v2->y, GLPortal::mirrorline))
{
ClipWall.Unclock();
return;
}
}
startAngle = seg->v2->GetViewAngle();
endAngle = seg->v1->GetViewAngle();
// Back side, i.e. backface culling - read: endAngle >= startAngle!
if (startAngle-endAngle<ANGLE_180 || !seg->linedef)
{
ClipWall.Unclock();
return;
}
if (!clipper.SafeCheckRange(startAngle, endAngle))
{
ClipWall.Unclock();
return;
}
if (!seg->backsector)
{
clipper.SafeAddClipRange(startAngle, endAngle);
}
else if (!polysub) // Two-sided polyobjects never obstruct the view
{
if (sector->sectornum == seg->backsector->sectornum)
{
FTexture * tex = TexMan(seg->sidedef->GetTexture(side_t::mid));
if (!tex || tex->UseType==FTexture::TEX_Null)
{
// nothing to do here!
ClipWall.Unclock();
seg->linedef->validcount=validcount;
return;
}
backsector=sector;
}
else
{
// clipping checks are only needed when the backsector is not the same as the front sector
gl_CheckViewArea(seg->v1, seg->v2, seg->frontsector, seg->backsector);
backsector = gl_FakeFlat(seg->backsector, &bs, true);
if (gl_CheckClip(seg->sidedef, sector, backsector))
{
clipper.SafeAddClipRange(startAngle, endAngle);
}
}
}
else
{
// Backsector for polyobj segs is always the containing sector itself
backsector = sector;
}
seg->linedef->flags |= ML_MAPPED;
ClipWall.Unclock();
if (!gl_render_segs)
{
// rendering per linedef as opposed per seg is significantly more efficient
// so mark the linedef as rendered here and render it completely.
if (seg->linedef->validcount!=validcount) seg->linedef->validcount=validcount;
else return;
}
GLWall wall;
SetupWall.Clock();
wall.Process(seg, sector, backsector, polysub, gl_render_segs);
rendered_lines++;
SetupWall.Unclock();
}
