Beispiel #1
0
void R_AddLine (seg_t *line)
{
	int                     x1, x2;
	angle_t         angle1, angle2, span, tspan;

#ifdef __NeXT__
	RD_DrawLineCheck (line);
#endif
	curline = line;

// OPTIMIZE: quickly reject orthogonal back sides

	angle1 = R_PointToAngle (line->v1->x, line->v1->y);
	angle2 = R_PointToAngle (line->v2->x, line->v2->y);

//
// clip to view edges
// OPTIMIZE: make constant out of 2*clipangle (FIELDOFVIEW)
	span = angle1 - angle2;
	if (span >= ANG180)
		return;         // back side

	rw_angle1 = angle1;             // global angle needed by segcalc
	angle1 -= viewangle;
	angle2 -= viewangle;

	tspan = angle1 + clipangle;
	if (tspan > 2*clipangle)
	{
		tspan -= 2*clipangle;
		if (tspan >= span)
			return; // totally off the left edge
		angle1 = clipangle;
	}
	tspan = clipangle - angle2;
	if (tspan > 2*clipangle)
	{
		tspan -= 2*clipangle;
		if (tspan >= span)
			return; // totally off the left edge
		angle2 = -clipangle;
	}

//
// the seg is in the view range, but not necessarily visible
//
	angle1 = (angle1+ANG90)>>ANGLETOFINESHIFT;
	angle2 = (angle2+ANG90)>>ANGLETOFINESHIFT;
	x1 = viewangletox[angle1];
	x2 = viewangletox[angle2];
	if (x1 == x2)
		return;                         // does not cross a pixel

	backsector = line->backsector;

	if (!backsector)
		goto clipsolid;         // single sided line

	if (backsector->ceilingheight <= frontsector->floorheight
	|| backsector->floorheight >= frontsector->ceilingheight)
		goto clipsolid;         // closed door

	if (backsector->ceilingheight != frontsector->ceilingheight
	|| backsector->floorheight != frontsector->floorheight)
		goto clippass;          // window

// reject empty lines used for triggers and special events
	if (backsector->ceilingpic == frontsector->ceilingpic
	&& backsector->floorpic == frontsector->floorpic
	&& backsector->lightlevel == frontsector->lightlevel
	&& backsector->special == frontsector->special
	&& curline->sidedef->midtexture == 0)
		return;

clippass:
	R_ClipPassWallSegment (x1, x2-1);
	return;

clipsolid:
	R_ClipSolidWallSegment (x1, x2-1);
}
Beispiel #2
0
//
// R_AddLine
// Clips the given segment and adds any visible pieces to the line list.
//
static void R_AddLine(seg_t *line)
{
	INT32 x1, x2;
	angle_t angle1, angle2, span, tspan;
	static sector_t tempsec; // ceiling/water hack

	if (line->polyseg && !(line->polyseg->flags & POF_RENDERSIDES))
		return;

	curline = line;

	// OPTIMIZE: quickly reject orthogonal back sides.
	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 >= ANGLE_180)
		return;

	// Global angle needed by segcalc.
	rw_angle1 = angle1;
	angle1 -= viewangle;
	angle2 -= viewangle;

	tspan = angle1 + clipangle;
	if (tspan > doubleclipangle)
	{
		tspan -= doubleclipangle;

		// Totally off the left edge?
		if (tspan >= span)
			return;

		angle1 = clipangle;
	}
	tspan = clipangle - angle2;
	if (tspan > doubleclipangle)
	{
		tspan -= doubleclipangle;

		// Totally off the left edge?
		if (tspan >= span)
			return;

		angle2 = -(signed)clipangle;
	}

	// The seg is in the view range, but not necessarily visible.
	angle1 = (angle1+ANGLE_90)>>ANGLETOFINESHIFT;
	angle2 = (angle2+ANGLE_90)>>ANGLETOFINESHIFT;
	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;

	// Portal line
	if (line->linedef->special == 40 && P_PointOnLineSide(viewx, viewy, line->linedef) == 0)
	{
		if (portalrender < cv_maxportals.value)
		{
			// Find the other side!
			INT32 line2 = P_FindSpecialLineFromTag(40, line->linedef->tag, -1);
			if (line->linedef == &lines[line2])
				line2 = P_FindSpecialLineFromTag(40, line->linedef->tag, line2);
			if (line2 >= 0) // found it!
			{
				R_AddPortal(line->linedef-lines, line2, x1, x2); // Remember the lines for later rendering
				//return; // Don't fill in that space now!
				goto clipsolid;
			}
		}
		// Recursed TOO FAR (viewing a portal within a portal)
		// So uhhh, render it as a normal wall instead or something ???
	}

	// Single sided line?
	if (!backsector)
		goto clipsolid;

	backsector = R_FakeFlat(backsector, &tempsec, NULL, NULL, true);

	doorclosed = 0;

	// Closed door.
#ifdef ESLOPE
	// Just don't bother checking this if one side is sloped. This is probably inefficient, but it's better than
	// random renderer stopping around slopes...
	if (!(frontsector->f_slope || frontsector->c_slope || backsector->f_slope || backsector->c_slope))
#endif
	if (backsector->ceilingheight <= frontsector->floorheight
		|| backsector->floorheight >= frontsector->ceilingheight)
	{
		goto clipsolid;
	}

	// Check for automap fix. Store in doorclosed for r_segs.c
	doorclosed = R_DoorClosed();
	if (doorclosed)
		goto clipsolid;

	// Window.
	if (backsector->ceilingheight != frontsector->ceilingheight
		|| backsector->floorheight != frontsector->floorheight)
	{
		goto clippass;
	}

	// Reject empty lines used for triggers and special events.
	// Identical floor and ceiling on both sides, identical light levels on both sides,
	// and no middle texture.

	if (
#ifdef POLYOBJECTS
		!line->polyseg &&
#endif
		backsector->ceilingpic == frontsector->ceilingpic
		&& backsector->floorpic == frontsector->floorpic
#ifdef ESLOPE
		&& backsector->f_slope == frontsector->f_slope
		&& backsector->c_slope == frontsector->c_slope
#endif
		&& backsector->lightlevel == frontsector->lightlevel
		&& !curline->sidedef->midtexture
		// Check offsets too!
		&& backsector->floor_xoffs == frontsector->floor_xoffs
		&& backsector->floor_yoffs == frontsector->floor_yoffs
		&& backsector->floorpic_angle == frontsector->floorpic_angle
		&& backsector->ceiling_xoffs == frontsector->ceiling_xoffs
		&& backsector->ceiling_yoffs == frontsector->ceiling_yoffs
		&& backsector->ceilingpic_angle == frontsector->ceilingpic_angle
		// Consider altered lighting.
		&& backsector->floorlightsec == frontsector->floorlightsec
		&& backsector->ceilinglightsec == frontsector->ceilinglightsec
		// Consider colormaps
		&& backsector->extra_colormap == frontsector->extra_colormap
		&& ((!frontsector->ffloors && !backsector->ffloors)
		|| frontsector->tag == backsector->tag))
	{
		return;
	}


clippass:
	R_ClipPassWallSegment(x1, x2 - 1);
	return;

clipsolid:
	R_ClipSolidWallSegment(x1, x2 - 1);
}
Beispiel #3
0
//
// R_AddLine
// Clips the given segment
// and adds any visible pieces to the line list.
//
void R_AddLine (seg_t*	line)
{
    int			x1;
    int			x2;
    angle_t		angle1;
    angle_t		angle2;
    angle_t		span;
    angle_t		tspan;
    
    curline = line;

    // OPTIMIZE: quickly reject orthogonal back sides.
    // [crispy] remove slime trails
    angle1 = R_PointToAngle (line->v1->px, line->v1->py);
    angle2 = R_PointToAngle (line->v2->px, line->v2->py);
    
    // Clip to view edges.
    // OPTIMIZE: make constant out of 2*clipangle (FIELDOFVIEW).
    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 = -clipangle;
    }
    
    // The seg is in the view range,
    // but not necessarily visible.
    angle1 = (angle1+ANG90)>>ANGLETOFINESHIFT;
    angle2 = (angle2+ANG90)>>ANGLETOFINESHIFT;
    x1 = viewangletox[angle1];
    x2 = viewangletox[angle2];

    // Does not cross a pixel?
    if (x1 == x2)
	return;				
	
    backsector = line->backsector;

    // Single sided line?
    if (!backsector)
	goto clipsolid;		

    // [AM] Interpolate sector movement before
    //      running clipping tests.  Frontsector
    //      should already be interpolated.
    R_MaybeInterpolateSector(backsector);

    // Closed door.
    if (backsector->interpceilingheight <= frontsector->interpfloorheight
	|| backsector->interpfloorheight >= frontsector->interpceilingheight)
	goto clipsolid;		

    // Window.
    if (backsector->interpceilingheight != frontsector->interpceilingheight
	|| backsector->interpfloorheight != frontsector->interpfloorheight)
	goto clippass;	
		
    // Reject empty lines used for triggers
    //  and special events.
    // Identical floor and ceiling on both sides,
    // identical light levels on both sides,
    // and no middle texture.
    if (backsector->ceilingpic == frontsector->ceilingpic
	&& backsector->floorpic == frontsector->floorpic
	&& backsector->lightlevel == frontsector->lightlevel
	&& curline->sidedef->midtexture == 0)
    {
	return;
    }
    
				
  clippass:
    R_ClipPassWallSegment (x1, x2-1);	
    return;
		
  clipsolid:
    R_ClipSolidWallSegment (x1, x2-1);
}
Beispiel #4
0
//
// R_AddLine
// Clips the given segment
// and adds any visible pieces to the line list.
//
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;

	// [RH] Color if not texturing line
	dc_color = ((line - segs) & 31) * 4;

	// OPTIMIZE: quickly reject orthogonal back sides.
	angle1 = R_PointToAngle (line->v1->x, line->v1->y);
	angle2 = R_PointToAngle (line->v2->x, line->v2->y);

	// Clip to view edges.
	// OPTIMIZE: make constant out of 2*clipangle (FIELDOFVIEW).
	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)
	{
		// Totally off the left edge?
		if (tspan - 2*clipangle >= span)
			return;

		angle1 = clipangle;
	}
	tspan = clipangle - angle2;
	if (tspan > 2*clipangle)
	{
		// Totally off the left edge?
		if (tspan - 2*clipangle >= span)
			return;
		angle2 = (unsigned) (-(int)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)
		goto clipsolid;

	// killough 3/8/98, 4/4/98: hack for invisible ceilings / deep water
	backsector = R_FakeFlat (backsector, &tempsec, NULL, NULL, true);

	doorclosed = 0;		// killough 4/16/98

	// Closed door.
	if (backsector->ceilingheight <= frontsector->floorheight
		|| backsector->floorheight >= frontsector->ceilingheight)
		goto clipsolid;

	// This fixes the automap floor height bug -- killough 1/18/98:
	// killough 4/7/98: optimize: save result in doorclosed for use in r_segs.c
	if ((doorclosed = R_DoorClosed()))
		goto clipsolid;

	// Window.
	if (backsector->ceilingheight != frontsector->ceilingheight
		|| backsector->floorheight != frontsector->floorheight)
		goto clippass;

	// Reject empty lines used for triggers
	//	and special events.
	// Identical floor and ceiling on both sides,
	// identical light levels on both sides,
	// and no middle texture.
	if (backsector->lightlevel == frontsector->lightlevel
		&& backsector->floorpic == frontsector->floorpic
		&& backsector->ceilingpic == frontsector->ceilingpic
		&& curline->sidedef->midtexture == 0

		// killough 3/7/98: Take flats offsets into account:
		&& backsector->floor_xoffs == frontsector->floor_xoffs
		&& (backsector->floor_yoffs + backsector->base_floor_yoffs) == (frontsector->floor_yoffs + backsector->base_floor_yoffs)
		&& backsector->ceiling_xoffs == frontsector->ceiling_xoffs
		&& (backsector->ceiling_yoffs + backsector->base_ceiling_yoffs) == (frontsector->ceiling_yoffs + frontsector->base_ceiling_yoffs)

		// killough 4/16/98: consider altered lighting
		&& backsector->floorlightsec == frontsector->floorlightsec
		&& backsector->ceilinglightsec == frontsector->ceilinglightsec

		// [RH] Also consider colormaps
		&& backsector->floorcolormap == frontsector->floorcolormap
		&& backsector->ceilingcolormap == frontsector->ceilingcolormap

		// [RH] and scaling
		&& backsector->floor_xscale == frontsector->floor_xscale
		&& backsector->floor_yscale == frontsector->floor_yscale
		&& backsector->ceiling_xscale == frontsector->ceiling_xscale
		&& backsector->ceiling_yscale == frontsector->ceiling_yscale

		// [RH] and rotation
		&& (backsector->floor_angle + backsector->base_floor_angle) == (frontsector->floor_angle + frontsector->base_floor_angle)
		&& (backsector->ceiling_angle + backsector->base_ceiling_angle) == (frontsector->ceiling_angle + frontsector->base_ceiling_angle)
		)
	{
		return;
	}


  clippass:
	R_ClipPassWallSegment (x1, x2-1);
	return;

  clipsolid:
	R_ClipSolidWallSegment (x1, x2-1);
}
Beispiel #5
0
//
// R_AddLine
// Clips the given segment
// and adds any visible pieces to the line list.
//
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_PointToAngleEx(line->v1->x, line->v1->y);
    angle2 = R_PointToAngleEx(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.
    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)
        return;

    backsector = line->backsector;

    // Single sided line?
    if (!backsector)
        goto clipsolid;

    // [AM] Interpolate sector movement before
    //      running clipping tests. Frontsector
    //      should already be interpolated.
    R_MaybeInterpolateSector(backsector);

    // killough 3/8/98, 4/4/98: hack for invisible ceilings / deep water
    backsector = R_FakeFlat(backsector, &tempsec, NULL, NULL, true);

    doorclosed = false; // killough 4/16/98

    // Closed door.
    if (backsector->interpceilingheight <= frontsector->interpfloorheight
        || backsector->interpfloorheight >= frontsector->interpceilingheight)
        goto clipsolid;

    // This fixes the automap floor height bug -- killough 1/18/98:
    // killough 4/7/98: optimize: save result in doorclosed for use in r_segs.c
    if ((doorclosed = R_DoorClosed()))
        goto clipsolid;

    // Window.
    if (backsector->interpceilingheight != frontsector->interpceilingheight
        || backsector->interpfloorheight != frontsector->interpfloorheight)
        goto clippass;

    // Reject empty lines used for triggers
    //  and special events.
    // Identical floor and ceiling on both sides,
    // identical light levels on both sides,
    // and no middle texture.
    if (backsector->ceilingpic == frontsector->ceilingpic
        && backsector->floorpic == frontsector->floorpic
        && backsector->lightlevel == frontsector->lightlevel
        && !curline->sidedef->midtexture

        // killough 3/7/98: Take flats offsets into account:
        && backsector->floor_xoffs == frontsector->floor_xoffs
        && backsector->floor_yoffs == frontsector->floor_yoffs
        && backsector->ceiling_xoffs == frontsector->ceiling_xoffs
        && backsector->ceiling_yoffs == frontsector->ceiling_yoffs

        // killough 4/16/98: consider altered lighting
        && backsector->floorlightsec == frontsector->floorlightsec
        && backsector->ceilinglightsec == frontsector->ceilinglightsec)
        return;

clippass:
    R_ClipPassWallSegment(x1, x2 - 1);
    return;

clipsolid:
    R_ClipSolidWallSegment(x1, x2 - 1);
}
Beispiel #6
0
//
// R_AddLine
// Clips the given segment
// and adds any visible pieces to the line list.
//
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;

	// [RH] Color if not texturing line
	dc_color = ((line - segs) & 31) * 4;

	// OPTIMIZE: quickly reject orthogonal back sides.
	angle1 = R_PointToAngle (line->v1->x, line->v1->y);
	angle2 = R_PointToAngle (line->v2->x, line->v2->y);

	// Clip to view edges.
	// OPTIMIZE: make constant out of 2*clipangle (FIELDOFVIEW).
	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)
	{
		// Totally off the left edge?
		if (tspan - 2*clipangle >= span)
			return;

		angle1 = clipangle;
	}
	tspan = clipangle - angle2;
	if (tspan > 2*clipangle)
	{
		// Totally off the left edge?
		if (tspan - 2*clipangle >= span)
			return;
		angle2 = (unsigned) (-(int)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;

	rw_start = x1;
	rw_stop = x2 - 1;
	
	rw_frontcz1 = P_CeilingHeight(line->v1->x, line->v1->y, frontsector);
	rw_frontfz1 = P_FloorHeight(line->v1->x, line->v1->y, frontsector);
	rw_frontcz2 = P_CeilingHeight(line->v2->x, line->v2->y, frontsector);
	rw_frontfz2 = P_FloorHeight(line->v2->x, line->v2->y, frontsector);	
	
	backsector = line->backsector;
	// Single sided line?
	if (!backsector)
		goto clipsolid;

	// killough 3/8/98, 4/4/98: hack for invisible ceilings / deep water
	backsector = R_FakeFlat (backsector, &tempsec, NULL, NULL, true);
		
	rw_backcz1 = P_CeilingHeight(line->v1->x, line->v1->y, backsector);
	rw_backfz1 = P_FloorHeight(line->v1->x, line->v1->y, backsector);
	rw_backcz2 = P_CeilingHeight(line->v2->x, line->v2->y, backsector);
	rw_backfz2 = P_FloorHeight(line->v2->x, line->v2->y, backsector);

	// [SL] Check for closed doors or other scenarios that would make this
	// line seg solid.
	//
	// This fixes the automap floor height bug -- killough 1/18/98:
	// killough 4/7/98: optimize: save result in doorclosed for use in r_segs.c
	if (!(line->linedef->flags & ML_TWOSIDED) ||
		 (rw_backcz1 <= rw_frontfz1 && rw_backcz2 <= rw_frontfz2) ||
		 (rw_backfz1 >= rw_frontcz1 && rw_backfz2 >= rw_frontcz2) ||

		// handle a case where the backsector slopes one direction
		// and the frontsector slopes the opposite:
		(rw_backcz1 <= rw_frontfz1 && rw_backfz1 >= rw_frontcz1) ||
		(rw_backcz2 <= rw_frontfz2 && rw_backfz2 >= rw_frontcz2) ||

		// if door is closed because back is shut:
		((rw_backcz1 <= rw_backfz1 && rw_backcz2 <= rw_backfz2) &&
		
		// preserve a kind of transparent door/lift special effect:
		((rw_backcz1 >= rw_frontcz1 && rw_backcz2 >= rw_frontcz2) ||
		 line->sidedef->toptexture) &&
		
		((rw_backfz1 <= rw_frontfz1 && rw_backfz2 <= rw_frontfz2) ||
		 line->sidedef->bottomtexture) &&

		// properly render skies (consider door "open" if both ceilings are sky):
		 (backsector->ceilingpic !=skyflatnum || 
		  frontsector->ceilingpic!=skyflatnum)))
	{
		doorclosed = true;
		goto clipsolid;
	}
	else
	{
		doorclosed = false;
	}

	// Window.
	if (!P_IdenticalPlanes(&frontsector->ceilingplane, &backsector->ceilingplane) ||
		!P_IdenticalPlanes(&frontsector->floorplane, &backsector->floorplane))
		goto clippass;

	// Reject empty lines used for triggers
	//	and special events.
	// Identical floor and ceiling on both sides,
	// identical light levels on both sides,
	// and no middle texture.
	if (backsector->lightlevel == frontsector->lightlevel
		&& backsector->floorpic == frontsector->floorpic
		&& backsector->ceilingpic == frontsector->ceilingpic
		&& curline->sidedef->midtexture == 0

		// killough 3/7/98: Take flats offsets into account:
		&& backsector->floor_xoffs == frontsector->floor_xoffs
		&& (backsector->floor_yoffs + backsector->base_floor_yoffs) == (frontsector->floor_yoffs + backsector->base_floor_yoffs)
		&& backsector->ceiling_xoffs == frontsector->ceiling_xoffs
		&& (backsector->ceiling_yoffs + backsector->base_ceiling_yoffs) == (frontsector->ceiling_yoffs + frontsector->base_ceiling_yoffs)

		// killough 4/16/98: consider altered lighting
		&& backsector->floorlightsec == frontsector->floorlightsec
		&& backsector->ceilinglightsec == frontsector->ceilinglightsec

		// [RH] Also consider colormaps
		&& backsector->floorcolormap == frontsector->floorcolormap
		&& backsector->ceilingcolormap == frontsector->ceilingcolormap

		// [RH] and scaling
		&& backsector->floor_xscale == frontsector->floor_xscale
		&& backsector->floor_yscale == frontsector->floor_yscale
		&& backsector->ceiling_xscale == frontsector->ceiling_xscale
		&& backsector->ceiling_yscale == frontsector->ceiling_yscale

		// [RH] and rotation
		&& (backsector->floor_angle + backsector->base_floor_angle) == (frontsector->floor_angle + frontsector->base_floor_angle)
		&& (backsector->ceiling_angle + backsector->base_ceiling_angle) == (frontsector->ceiling_angle + frontsector->base_ceiling_angle)
		)
	{
		return;
	}

  clippass:
	R_ClipPassWallSegment (x1, x2-1);
	return;

  clipsolid:
	R_ClipSolidWallSegment (x1, x2-1);
}
Beispiel #7
0
//
// R_AddLine
// Clips the given segment
// and adds any visible pieces to the line list.
//
void R_AddLine(seg_t* line, vector<SegInfo>& segInfo, int parentIdx)
{
	int			x1;
	int			x2;
	angle_t		angle1;
	angle_t		angle2;
	angle_t		span;
	angle_t		tspan;

	curline = line;

	// OPTIMIZE: quickly reject orthogonal back sides.
	angle1 = R_PointToAngle(line->v1->x, line->v1->y);
	angle2 = R_PointToAngle(line->v2->x, line->v2->y);

	// Clip to view edges.
	// OPTIMIZE: make constant out of 2*clipangle (FIELDOFVIEW).
	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 = -static_cast<int>(clipangle);
	}

	// The seg is in the view range,
	// but not necessarily visible.
	angle1 = (angle1 + ANG90) >> ANGLETOFINESHIFT;
	angle2 = (angle2 + ANG90) >> ANGLETOFINESHIFT;
	x1 = viewangletox[angle1];
	x2 = viewangletox[angle2];

	// Does not cross a pixel?
	if (x1 == x2)
		return;

	backsector = line->backsector;

	// Single sided line?
	if (!backsector)
		goto clipsolid;

	// Closed door.
	if (backsector->ceilingheight <= frontsector->floorheight
		|| backsector->floorheight >= frontsector->ceilingheight)
		goto clipsolid;

	// Window.
	if (backsector->ceilingheight != frontsector->ceilingheight
		|| backsector->floorheight != frontsector->floorheight)
		goto clippass;

	// Reject empty lines used for triggers
	//  and special events.
	// Identical floor and ceiling on both sides,
	// identical light levels on both sides,
	// and no middle texture.
	if (backsector->ceilingpic == frontsector->ceilingpic
		&& backsector->floorpic == frontsector->floorpic
		&& backsector->lightlevel == frontsector->lightlevel
		&& curline->sidedef->midtexture == 0)
	{
		return;
	}


clippass:
	AddSegInfo(line, segInfo, parentIdx);
	R_ClipPassWallSegment(x1, x2 - 1);
	return;

clipsolid:
	AddSegInfo(line, segInfo, parentIdx);
	R_ClipSolidWallSegment(x1, x2 - 1);
}