static void R_AddLine (seg_t *line)
{
int x1;
int x2;
angle_t angle1;
angle_t angle2;
angle_t span;
angle_t tspan;
static sector_t tempsec; // killough 3/8/98: ceiling/water hack
curline = line;
angle1 = R_PointToAngle (line->v1->x, line->v1->y);
angle2 = R_PointToAngle (line->v2->x, line->v2->y);
// Clip to view edges.
span = angle1 - angle2;
// Back side, i.e. backface culling
if (span >= ANG180)
return;
// Global angle needed by segcalc.
rw_angle1 = angle1;
angle1 -= viewangle;
angle2 -= viewangle;
tspan = angle1 + clipangle;
if (tspan > 2*clipangle)
{
tspan -= 2*clipangle;
// Totally off the left edge?
if (tspan >= span)
return;
angle1 = clipangle;
}
tspan = clipangle - angle2;
if (tspan > 2*clipangle)
{
tspan -= 2*clipangle;
// Totally off the left edge?
if (tspan >= span)
return;
angle2 = 0-clipangle;
}
// The seg is in the view range,
// but not necessarily visible.
angle1 = (angle1+ANG90)>>ANGLETOFINESHIFT;
angle2 = (angle2+ANG90)>>ANGLETOFINESHIFT;
// killough 1/31/98: Here is where "slime trails" can SOMETIMES occur:
x1 = viewangletox[angle1];
x2 = viewangletox[angle2];
#ifdef GL_DOOM
// proff 11/99: we have to add these segs to avoid gaps in OpenGL
if (x1 >= x2) // killough 1/31/98 -- change == to >= for robustness
{
if (V_GetMode() == VID_MODEGL)
{
if (ds_p == drawsegs+maxdrawsegs) // killough 1/98 -- fix 2s line HOM
{
unsigned pos = ds_p - drawsegs; // jff 8/9/98 fix from ZDOOM1.14a
unsigned newmax = maxdrawsegs ? maxdrawsegs*2 : 128; // killough
drawsegs = realloc(drawsegs,newmax*sizeof(*drawsegs));
//ds_p = drawsegs+maxdrawsegs;
ds_p = drawsegs + pos; // jff 8/9/98 fix from ZDOOM1.14a
maxdrawsegs = newmax;
}
ds_p->curline = curline;
ds_p++;
gld_AddWall(curline);
return;
}
else
return;
}
#else
// Does not cross a pixel?
if (x1 >= x2) // killough 1/31/98 -- change == to >= for robustness
return;
#endif
backsector = line->backsector;
// Single sided line?
if (backsector)
// killough 3/8/98, 4/4/98: hack for invisible ceilings / deep water
backsector = R_FakeFlat(backsector, &tempsec, NULL, NULL, true);
/* cph - roll up linedef properties in flags */
if ((linedef = curline->linedef)->r_validcount != gametic)
R_RecalcLineFlags();
if (linedef->r_flags & RF_IGNORE)
{
return;
}
else
R_ClipWallSegment (x1, x2, linedef->r_flags & RF_CLOSED);
}
static void R_AddLine (seg_t *line)
{
int x1;
int x2;
angle_t angle1;
angle_t angle2;
angle_t span;
angle_t tspan;
static sector_t tempsec; // killough 3/8/98: ceiling/water hack
curline = line;
angle1 = R_GetVertexViewAngle(line->v1);
angle2 = R_GetVertexViewAngle(line->v2);
#ifdef GL_DOOM
if (V_GetMode() == VID_MODEGL)
{
if (curline->linedef->r_flags & RF_IGNORE_CURRENT)
return;
// Back side, i.e. backface culling - read: endAngle >= startAngle!
if (angle2 - angle1 < ANG180 || !line->linedef)
{
return;
}
if (!gld_clipper_SafeCheckRange(angle2, angle1))
{
return;
}
map_subsectors[currentsubsectornum] = 1;
if (!line->backsector)
{
gld_clipper_SafeAddClipRange(angle2, angle1);
}
else
{
if (line->frontsector == line->backsector)
{
if (texturetranslation[line->sidedef->midtexture] == NO_TEXTURE)
{
//e6y: nothing to do here!
return;
}
}
if (CheckClip(line, line->frontsector, line->backsector))
{
gld_clipper_SafeAddClipRange(angle2, angle1);
}
}
if (ds_p == drawsegs+maxdrawsegs) // killough 1/98 -- fix 2s line HOM
{
unsigned pos = ds_p - drawsegs; // jff 8/9/98 fix from ZDOOM1.14a
unsigned newmax = maxdrawsegs ? maxdrawsegs*2 : 128; // killough
drawsegs = realloc(drawsegs,newmax*sizeof(*drawsegs));
ds_p = drawsegs + pos; // jff 8/9/98 fix from ZDOOM1.14a
maxdrawsegs = newmax;
}
if(curline->miniseg == false) // figgi -- skip minisegs
curline->linedef->flags |= ML_MAPPED;
// proff 11/99: the rest of the calculations is not needed for OpenGL
ds_p++->curline = curline;
gld_AddWall(curline);
return;
}
#endif
// Clip to view edges.
span = angle1 - angle2;
// Back side, i.e. backface culling
if (span >= ANG180)
return;
// Global angle needed by segcalc.
rw_angle1 = angle1;
angle1 -= viewangle;
angle2 -= viewangle;
tspan = angle1 + clipangle;
if (tspan > 2*clipangle)
{
tspan -= 2*clipangle;
// Totally off the left edge?
if (tspan >= span)
return;
angle1 = clipangle;
}
tspan = clipangle - angle2;
if (tspan > 2*clipangle)
{
tspan -= 2*clipangle;
// Totally off the left edge?
if (tspan >= span)
return;
angle2 = 0-clipangle;
}
// The seg is in the view range,
// but not necessarily visible.
angle1 = (angle1+ANG90)>>ANGLETOFINESHIFT;
angle2 = (angle2+ANG90)>>ANGLETOFINESHIFT;
// killough 1/31/98: Here is where "slime trails" can SOMETIMES occur:
x1 = viewangletox[angle1];
x2 = viewangletox[angle2];
// Does not cross a pixel?
if (x1 >= x2) // killough 1/31/98 -- change == to >= for robustness
return;
backsector = line->backsector;
// Single sided line?
if (backsector)
// killough 3/8/98, 4/4/98: hack for invisible ceilings / deep water
backsector = R_FakeFlat(backsector, &tempsec, NULL, NULL, true);
/* cph - roll up linedef properties in flags */
if ((linedef = curline->linedef)->r_validcount != gametic)
R_RecalcLineFlags(linedef);
if (linedef->r_flags & RF_IGNORE_CURRENT)
{
return;
}
else
R_ClipWallSegment (x1, x2, linedef->r_flags & RF_CLOSED);
}
