ref: 74e939aa51f40cd1ef3b40b82cd52f0fe6949828
dir: /src/heretic/r_things.c/
// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 1993-2008 Raven Software
// Copyright(C) 2008 Simon Howard
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
// 02111-1307, USA.
//
//-----------------------------------------------------------------------------
// R_things.c
#include <stdio.h>
#include <stdlib.h>
#include "doomdef.h"
#include "i_swap.h"
#include "i_system.h"
#include "r_local.h"
void R_DrawColumn(void);
void R_DrawTLColumn(void);
typedef struct
{
int x1, x2;
int column;
int topclip;
int bottomclip;
} maskdraw_t;
/*
Sprite rotation 0 is facing the viewer, rotation 1 is one angle turn CLOCKWISE around the axis.
This is not the same as the angle, which increases counter clockwise
(protractor). There was a lot of stuff grabbed wrong, so I changed it...
*/
fixed_t pspritescale, pspriteiscale;
lighttable_t **spritelights;
// constant arrays used for psprite clipping and initializing clipping
short negonearray[SCREENWIDTH];
short screenheightarray[SCREENWIDTH];
/*
===============================================================================
INITIALIZATION FUNCTIONS
===============================================================================
*/
// variables used to look up and range check thing_t sprites patches
spritedef_t *sprites;
int numsprites;
spriteframe_t sprtemp[26];
int maxframe;
char *spritename;
/*
=================
=
= R_InstallSpriteLump
=
= Local function for R_InitSprites
=================
*/
void R_InstallSpriteLump(int lump, unsigned frame, unsigned rotation,
boolean flipped)
{
int r;
if (frame >= 26 || rotation > 8)
I_Error("R_InstallSpriteLump: Bad frame characters in lump %i", lump);
if ((int) frame > maxframe)
maxframe = frame;
if (rotation == 0)
{
// the lump should be used for all rotations
if (sprtemp[frame].rotate == false)
I_Error("R_InitSprites: Sprite %s frame %c has multip rot=0 lump",
spritename, 'A' + frame);
if (sprtemp[frame].rotate == true)
I_Error
("R_InitSprites: Sprite %s frame %c has rotations and a rot=0 lump",
spritename, 'A' + frame);
sprtemp[frame].rotate = false;
for (r = 0; r < 8; r++)
{
sprtemp[frame].lump[r] = lump - firstspritelump;
sprtemp[frame].flip[r] = (byte) flipped;
}
return;
}
// the lump is only used for one rotation
if (sprtemp[frame].rotate == false)
I_Error
("R_InitSprites: Sprite %s frame %c has rotations and a rot=0 lump",
spritename, 'A' + frame);
sprtemp[frame].rotate = true;
rotation--; // make 0 based
if (sprtemp[frame].lump[rotation] != -1)
I_Error
("R_InitSprites: Sprite %s : %c : %c has two lumps mapped to it",
spritename, 'A' + frame, '1' + rotation);
sprtemp[frame].lump[rotation] = lump - firstspritelump;
sprtemp[frame].flip[rotation] = (byte) flipped;
}
/*
=================
=
= R_InitSpriteDefs
=
= Pass a null terminated list of sprite names (4 chars exactly) to be used
= Builds the sprite rotation matrixes to account for horizontally flipped
= sprites. Will report an error if the lumps are inconsistant
=Only called at startup
=
= Sprite lump names are 4 characters for the actor, a letter for the frame,
= and a number for the rotation, A sprite that is flippable will have an
= additional letter/number appended. The rotation character can be 0 to
= signify no rotations
=================
*/
void R_InitSpriteDefs(char **namelist)
{
char **check;
int i, l, intname, frame, rotation;
int start, end;
// count the number of sprite names
check = namelist;
while (*check != NULL)
check++;
numsprites = check - namelist;
if (!numsprites)
return;
sprites = Z_Malloc(numsprites * sizeof(*sprites), PU_STATIC, NULL);
start = firstspritelump - 1;
end = lastspritelump + 1;
// scan all the lump names for each of the names, noting the highest
// frame letter
// Just compare 4 characters as ints
for (i = 0; i < numsprites; i++)
{
spritename = namelist[i];
memset(sprtemp, -1, sizeof(sprtemp));
maxframe = -1;
intname = *(int *) namelist[i];
//
// scan the lumps, filling in the frames for whatever is found
//
for (l = start + 1; l < end; l++)
if (*(int *) lumpinfo[l].name == intname)
{
frame = lumpinfo[l].name[4] - 'A';
rotation = lumpinfo[l].name[5] - '0';
R_InstallSpriteLump(l, frame, rotation, false);
if (lumpinfo[l].name[6])
{
frame = lumpinfo[l].name[6] - 'A';
rotation = lumpinfo[l].name[7] - '0';
R_InstallSpriteLump(l, frame, rotation, true);
}
}
//
// check the frames that were found for completeness
//
if (maxframe == -1)
{
//continue;
sprites[i].numframes = 0;
if (gamemode == shareware)
continue;
I_Error("R_InitSprites: No lumps found for sprite %s",
namelist[i]);
}
maxframe++;
for (frame = 0; frame < maxframe; frame++)
{
switch ((int) sprtemp[frame].rotate)
{
case -1: // no rotations were found for that frame at all
I_Error("R_InitSprites: No patches found for %s frame %c",
namelist[i], frame + 'A');
case 0: // only the first rotation is needed
break;
case 1: // must have all 8 frames
for (rotation = 0; rotation < 8; rotation++)
if (sprtemp[frame].lump[rotation] == -1)
I_Error
("R_InitSprites: Sprite %s frame %c is missing rotations",
namelist[i], frame + 'A');
}
}
//
// allocate space for the frames present and copy sprtemp to it
//
sprites[i].numframes = maxframe;
sprites[i].spriteframes =
Z_Malloc(maxframe * sizeof(spriteframe_t), PU_STATIC, NULL);
memcpy(sprites[i].spriteframes, sprtemp,
maxframe * sizeof(spriteframe_t));
}
}
/*
===============================================================================
GAME FUNCTIONS
===============================================================================
*/
vissprite_t vissprites[MAXVISSPRITES], *vissprite_p;
int newvissprite;
/*
===================
=
= R_InitSprites
=
= Called at program start
===================
*/
void R_InitSprites(char **namelist)
{
int i;
for (i = 0; i < SCREENWIDTH; i++)
{
negonearray[i] = -1;
}
R_InitSpriteDefs(namelist);
}
/*
===================
=
= R_ClearSprites
=
= Called at frame start
===================
*/
void R_ClearSprites(void)
{
vissprite_p = vissprites;
}
/*
===================
=
= R_NewVisSprite
=
===================
*/
vissprite_t overflowsprite;
vissprite_t *R_NewVisSprite(void)
{
if (vissprite_p == &vissprites[MAXVISSPRITES])
return &overflowsprite;
vissprite_p++;
return vissprite_p - 1;
}
/*
================
=
= R_DrawMaskedColumn
=
= Used for sprites and masked mid textures
================
*/
short *mfloorclip;
short *mceilingclip;
fixed_t spryscale;
fixed_t sprtopscreen;
fixed_t sprbotscreen;
void R_DrawMaskedColumn(column_t * column, signed int baseclip)
{
int topscreen, bottomscreen;
fixed_t basetexturemid;
basetexturemid = dc_texturemid;
for (; column->topdelta != 0xff;)
{
// calculate unclipped screen coordinates for post
topscreen = sprtopscreen + spryscale * column->topdelta;
bottomscreen = topscreen + spryscale * column->length;
dc_yl = (topscreen + FRACUNIT - 1) >> FRACBITS;
dc_yh = (bottomscreen - 1) >> FRACBITS;
if (dc_yh >= mfloorclip[dc_x])
dc_yh = mfloorclip[dc_x] - 1;
if (dc_yl <= mceilingclip[dc_x])
dc_yl = mceilingclip[dc_x] + 1;
if (dc_yh >= baseclip && baseclip != -1)
dc_yh = baseclip;
if (dc_yl <= dc_yh)
{
dc_source = (byte *) column + 3;
dc_texturemid = basetexturemid - (column->topdelta << FRACBITS);
// dc_source = (byte *)column + 3 - column->topdelta;
colfunc(); // either R_DrawColumn or R_DrawTLColumn
}
column = (column_t *) ((byte *) column + column->length + 4);
}
dc_texturemid = basetexturemid;
}
/*
================
=
= R_DrawVisSprite
=
= mfloorclip and mceilingclip should also be set
================
*/
void R_DrawVisSprite(vissprite_t * vis, int x1, int x2)
{
column_t *column;
int texturecolumn;
fixed_t frac;
patch_t *patch;
fixed_t baseclip;
patch = W_CacheLumpNum(vis->patch + firstspritelump, PU_CACHE);
dc_colormap = vis->colormap;
// if(!dc_colormap)
// colfunc = tlcolfunc; // NULL colormap = shadow draw
if (vis->mobjflags & MF_SHADOW)
{
if (vis->mobjflags & MF_TRANSLATION)
{
colfunc = R_DrawTranslatedTLColumn;
dc_translation = translationtables - 256 +
((vis->mobjflags & MF_TRANSLATION) >> (MF_TRANSSHIFT - 8));
}
else
{ // Draw using shadow column function
colfunc = tlcolfunc;
}
}
else if (vis->mobjflags & MF_TRANSLATION)
{
// Draw using translated column function
colfunc = R_DrawTranslatedColumn;
dc_translation = translationtables - 256 +
((vis->mobjflags & MF_TRANSLATION) >> (MF_TRANSSHIFT - 8));
}
dc_iscale = abs(vis->xiscale) >> detailshift;
dc_texturemid = vis->texturemid;
frac = vis->startfrac;
spryscale = vis->scale;
sprtopscreen = centeryfrac - FixedMul(dc_texturemid, spryscale);
// check to see if weapon is a vissprite
if (vis->psprite)
{
dc_texturemid += FixedMul(((centery - viewheight / 2) << FRACBITS),
vis->xiscale);
sprtopscreen += (viewheight / 2 - centery) << FRACBITS;
}
if (vis->footclip && !vis->psprite)
{
sprbotscreen = sprtopscreen + FixedMul(patch->height << FRACBITS,
spryscale);
baseclip = (sprbotscreen - FixedMul(vis->footclip << FRACBITS,
spryscale)) >> FRACBITS;
}
else
{
baseclip = -1;
}
for (dc_x = vis->x1; dc_x <= vis->x2; dc_x++, frac += vis->xiscale)
{
texturecolumn = frac >> FRACBITS;
#ifdef RANGECHECK
if (texturecolumn < 0 || texturecolumn >= SHORT(patch->width))
I_Error("R_DrawSpriteRange: bad texturecolumn");
#endif
column = (column_t *) ((byte *) patch +
LONG(patch->columnofs[texturecolumn]));
R_DrawMaskedColumn(column, baseclip);
}
colfunc = basecolfunc;
}
/*
===================
=
= R_ProjectSprite
=
= Generates a vissprite for a thing if it might be visible
=
===================
*/
void R_ProjectSprite(mobj_t * thing)
{
fixed_t trx, try;
fixed_t gxt, gyt;
fixed_t tx, tz;
fixed_t xscale;
int x1, x2;
spritedef_t *sprdef;
spriteframe_t *sprframe;
int lump;
unsigned rot;
boolean flip;
int index;
vissprite_t *vis;
angle_t ang;
fixed_t iscale;
if (thing->flags2 & MF2_DONTDRAW)
{ // Never make a vissprite when MF2_DONTDRAW is flagged.
return;
}
//
// transform the origin point
//
trx = thing->x - viewx;
try = thing->y - viewy;
gxt = FixedMul(trx, viewcos);
gyt = -FixedMul(try, viewsin);
tz = gxt - gyt;
if (tz < MINZ)
return; // thing is behind view plane
xscale = FixedDiv(projection, tz);
gxt = -FixedMul(trx, viewsin);
gyt = FixedMul(try, viewcos);
tx = -(gyt + gxt);
if (abs(tx) > (tz << 2))
return; // too far off the side
//
// decide which patch to use for sprite reletive to player
//
#ifdef RANGECHECK
if ((unsigned) thing->sprite >= numsprites)
I_Error("R_ProjectSprite: invalid sprite number %i ", thing->sprite);
#endif
sprdef = &sprites[thing->sprite];
#ifdef RANGECHECK
if ((thing->frame & FF_FRAMEMASK) >= sprdef->numframes)
I_Error("R_ProjectSprite: invalid sprite frame %i : %i ",
thing->sprite, thing->frame);
#endif
sprframe = &sprdef->spriteframes[thing->frame & FF_FRAMEMASK];
if (sprframe->rotate)
{ // choose a different rotation based on player view
ang = R_PointToAngle(thing->x, thing->y);
rot = (ang - thing->angle + (unsigned) (ANG45 / 2) * 9) >> 29;
lump = sprframe->lump[rot];
flip = (boolean) sprframe->flip[rot];
}
else
{ // use single rotation for all views
lump = sprframe->lump[0];
flip = (boolean) sprframe->flip[0];
}
//
// calculate edges of the shape
//
tx -= spriteoffset[lump];
x1 = (centerxfrac + FixedMul(tx, xscale)) >> FRACBITS;
if (x1 > viewwidth)
return; // off the right side
tx += spritewidth[lump];
x2 = ((centerxfrac + FixedMul(tx, xscale)) >> FRACBITS) - 1;
if (x2 < 0)
return; // off the left side
//
// store information in a vissprite
//
vis = R_NewVisSprite();
vis->mobjflags = thing->flags;
vis->psprite = false;
vis->scale = xscale << detailshift;
vis->gx = thing->x;
vis->gy = thing->y;
vis->gz = thing->z;
vis->gzt = thing->z + spritetopoffset[lump];
// foot clipping
if (thing->flags2 & MF2_FEETARECLIPPED
&& thing->z <= thing->subsector->sector->floorheight)
{
vis->footclip = 10;
}
else
vis->footclip = 0;
vis->texturemid = vis->gzt - viewz - (vis->footclip << FRACBITS);
vis->x1 = x1 < 0 ? 0 : x1;
vis->x2 = x2 >= viewwidth ? viewwidth - 1 : x2;
iscale = FixedDiv(FRACUNIT, xscale);
if (flip)
{
vis->startfrac = spritewidth[lump] - 1;
vis->xiscale = -iscale;
}
else
{
vis->startfrac = 0;
vis->xiscale = iscale;
}
if (vis->x1 > x1)
vis->startfrac += vis->xiscale * (vis->x1 - x1);
vis->patch = lump;
//
// get light level
//
// if (thing->flags & MF_SHADOW)
// vis->colormap = NULL; // shadow draw
// else ...
if (fixedcolormap)
vis->colormap = fixedcolormap; // fixed map
else if (thing->frame & FF_FULLBRIGHT)
vis->colormap = colormaps; // full bright
else
{ // diminished light
index = xscale >> (LIGHTSCALESHIFT - detailshift);
if (index >= MAXLIGHTSCALE)
index = MAXLIGHTSCALE - 1;
vis->colormap = spritelights[index];
}
}
/*
========================
=
= R_AddSprites
=
========================
*/
void R_AddSprites(sector_t * sec)
{
mobj_t *thing;
int lightnum;
if (sec->validcount == validcount)
return; // already added
sec->validcount = validcount;
lightnum = (sec->lightlevel >> LIGHTSEGSHIFT) + extralight;
if (lightnum < 0)
spritelights = scalelight[0];
else if (lightnum >= LIGHTLEVELS)
spritelights = scalelight[LIGHTLEVELS - 1];
else
spritelights = scalelight[lightnum];
for (thing = sec->thinglist; thing; thing = thing->snext)
R_ProjectSprite(thing);
}
/*
========================
=
= R_DrawPSprite
=
========================
*/
int PSpriteSY[NUMWEAPONS] = {
0, // staff
5 * FRACUNIT, // goldwand
15 * FRACUNIT, // crossbow
15 * FRACUNIT, // blaster
15 * FRACUNIT, // skullrod
15 * FRACUNIT, // phoenix rod
15 * FRACUNIT, // mace
15 * FRACUNIT, // gauntlets
15 * FRACUNIT // beak
};
void R_DrawPSprite(pspdef_t * psp)
{
fixed_t tx;
int x1, x2;
spritedef_t *sprdef;
spriteframe_t *sprframe;
int lump;
boolean flip;
vissprite_t *vis, avis;
int tempangle;
//
// decide which patch to use
//
#ifdef RANGECHECK
if ((unsigned) psp->state->sprite >= numsprites)
I_Error("R_ProjectSprite: invalid sprite number %i ",
psp->state->sprite);
#endif
sprdef = &sprites[psp->state->sprite];
#ifdef RANGECHECK
if ((psp->state->frame & FF_FRAMEMASK) >= sprdef->numframes)
I_Error("R_ProjectSprite: invalid sprite frame %i : %i ",
psp->state->sprite, psp->state->frame);
#endif
sprframe = &sprdef->spriteframes[psp->state->frame & FF_FRAMEMASK];
lump = sprframe->lump[0];
flip = (boolean) sprframe->flip[0];
//
// calculate edges of the shape
//
tx = psp->sx - 160 * FRACUNIT;
tx -= spriteoffset[lump];
if (viewangleoffset)
{
tempangle =
((centerxfrac / 1024) * (viewangleoffset >> ANGLETOFINESHIFT));
}
else
{
tempangle = 0;
}
x1 = (centerxfrac + FixedMul(tx, pspritescale) + tempangle) >> FRACBITS;
if (x1 > viewwidth)
return; // off the right side
tx += spritewidth[lump];
x2 = ((centerxfrac + FixedMul(tx, pspritescale) +
tempangle) >> FRACBITS) - 1;
if (x2 < 0)
return; // off the left side
//
// store information in a vissprite
//
vis = &avis;
vis->mobjflags = 0;
vis->psprite = true;
vis->texturemid =
(BASEYCENTER << FRACBITS) + FRACUNIT / 2 - (psp->sy -
spritetopoffset[lump]);
if (viewheight == SCREENHEIGHT)
{
vis->texturemid -= PSpriteSY[players[consoleplayer].readyweapon];
}
vis->x1 = x1 < 0 ? 0 : x1;
vis->x2 = x2 >= viewwidth ? viewwidth - 1 : x2;
vis->scale = pspritescale << detailshift;
if (flip)
{
vis->xiscale = -pspriteiscale;
vis->startfrac = spritewidth[lump] - 1;
}
else
{
vis->xiscale = pspriteiscale;
vis->startfrac = 0;
}
if (vis->x1 > x1)
vis->startfrac += vis->xiscale * (vis->x1 - x1);
vis->patch = lump;
if (viewplayer->powers[pw_invisibility] > 4 * 32 ||
viewplayer->powers[pw_invisibility] & 8)
{
// Invisibility
vis->colormap = spritelights[MAXLIGHTSCALE - 1];
vis->mobjflags |= MF_SHADOW;
}
else if (fixedcolormap)
{
// Fixed color
vis->colormap = fixedcolormap;
}
else if (psp->state->frame & FF_FULLBRIGHT)
{
// Full bright
vis->colormap = colormaps;
}
else
{
// local light
vis->colormap = spritelights[MAXLIGHTSCALE - 1];
}
R_DrawVisSprite(vis, vis->x1, vis->x2);
}
/*
========================
=
= R_DrawPlayerSprites
=
========================
*/
void R_DrawPlayerSprites(void)
{
int i, lightnum;
pspdef_t *psp;
//
// get light level
//
lightnum =
(viewplayer->mo->subsector->sector->lightlevel >> LIGHTSEGSHIFT) +
extralight;
if (lightnum < 0)
spritelights = scalelight[0];
else if (lightnum >= LIGHTLEVELS)
spritelights = scalelight[LIGHTLEVELS - 1];
else
spritelights = scalelight[lightnum];
//
// clip to screen bounds
//
mfloorclip = screenheightarray;
mceilingclip = negonearray;
//
// add all active psprites
//
for (i = 0, psp = viewplayer->psprites; i < NUMPSPRITES; i++, psp++)
if (psp->state)
R_DrawPSprite(psp);
}
/*
========================
=
= R_SortVisSprites
=
========================
*/
vissprite_t vsprsortedhead;
void R_SortVisSprites(void)
{
int i, count;
vissprite_t *ds, *best;
vissprite_t unsorted;
fixed_t bestscale;
count = vissprite_p - vissprites;
unsorted.next = unsorted.prev = &unsorted;
if (!count)
return;
for (ds = vissprites; ds < vissprite_p; ds++)
{
ds->next = ds + 1;
ds->prev = ds - 1;
}
vissprites[0].prev = &unsorted;
unsorted.next = &vissprites[0];
(vissprite_p - 1)->next = &unsorted;
unsorted.prev = vissprite_p - 1;
//
// pull the vissprites out by scale
//
best = 0; // shut up the compiler warning
vsprsortedhead.next = vsprsortedhead.prev = &vsprsortedhead;
for (i = 0; i < count; i++)
{
bestscale = INT_MAX;
for (ds = unsorted.next; ds != &unsorted; ds = ds->next)
{
if (ds->scale < bestscale)
{
bestscale = ds->scale;
best = ds;
}
}
best->next->prev = best->prev;
best->prev->next = best->next;
best->next = &vsprsortedhead;
best->prev = vsprsortedhead.prev;
vsprsortedhead.prev->next = best;
vsprsortedhead.prev = best;
}
}
/*
========================
=
= R_DrawSprite
=
========================
*/
void R_DrawSprite(vissprite_t * spr)
{
drawseg_t *ds;
short clipbot[SCREENWIDTH], cliptop[SCREENWIDTH];
int x, r1, r2;
fixed_t scale, lowscale;
int silhouette;
for (x = spr->x1; x <= spr->x2; x++)
clipbot[x] = cliptop[x] = -2;
//
// scan drawsegs from end to start for obscuring segs
// the first drawseg that has a greater scale is the clip seg
//
for (ds = ds_p - 1; ds >= drawsegs; ds--)
{
//
// determine if the drawseg obscures the sprite
//
if (ds->x1 > spr->x2 || ds->x2 < spr->x1 ||
(!ds->silhouette && !ds->maskedtexturecol))
continue; // doesn't cover sprite
r1 = ds->x1 < spr->x1 ? spr->x1 : ds->x1;
r2 = ds->x2 > spr->x2 ? spr->x2 : ds->x2;
if (ds->scale1 > ds->scale2)
{
lowscale = ds->scale2;
scale = ds->scale1;
}
else
{
lowscale = ds->scale1;
scale = ds->scale2;
}
if (scale < spr->scale || (lowscale < spr->scale
&& !R_PointOnSegSide(spr->gx, spr->gy,
ds->curline)))
{
if (ds->maskedtexturecol) // masked mid texture
R_RenderMaskedSegRange(ds, r1, r2);
continue; // seg is behind sprite
}
//
// clip this piece of the sprite
//
silhouette = ds->silhouette;
if (spr->gz >= ds->bsilheight)
silhouette &= ~SIL_BOTTOM;
if (spr->gzt <= ds->tsilheight)
silhouette &= ~SIL_TOP;
if (silhouette == 1)
{ // bottom sil
for (x = r1; x <= r2; x++)
if (clipbot[x] == -2)
clipbot[x] = ds->sprbottomclip[x];
}
else if (silhouette == 2)
{ // top sil
for (x = r1; x <= r2; x++)
if (cliptop[x] == -2)
cliptop[x] = ds->sprtopclip[x];
}
else if (silhouette == 3)
{ // both
for (x = r1; x <= r2; x++)
{
if (clipbot[x] == -2)
clipbot[x] = ds->sprbottomclip[x];
if (cliptop[x] == -2)
cliptop[x] = ds->sprtopclip[x];
}
}
}
//
// all clipping has been performed, so draw the sprite
//
// check for unclipped columns
for (x = spr->x1; x <= spr->x2; x++)
{
if (clipbot[x] == -2)
clipbot[x] = viewheight;
if (cliptop[x] == -2)
cliptop[x] = -1;
}
mfloorclip = clipbot;
mceilingclip = cliptop;
R_DrawVisSprite(spr, spr->x1, spr->x2);
}
/*
========================
=
= R_DrawMasked
=
========================
*/
void R_DrawMasked(void)
{
vissprite_t *spr;
drawseg_t *ds;
R_SortVisSprites();
if (vissprite_p > vissprites)
{
// draw all vissprites back to front
for (spr = vsprsortedhead.next; spr != &vsprsortedhead;
spr = spr->next)
R_DrawSprite(spr);
}
//
// render any remaining masked mid textures
//
for (ds = ds_p - 1; ds >= drawsegs; ds--)
if (ds->maskedtexturecol)
R_RenderMaskedSegRange(ds, ds->x1, ds->x2);
//
// draw the psprites on top of everything
//
// Added for the sideviewing with an external device
if (viewangleoffset <= 1024 << ANGLETOFINESHIFT || viewangleoffset >=
-1024 << ANGLETOFINESHIFT)
{ // don't draw on side views
R_DrawPlayerSprites();
}
// if (!viewangleoffset) // don't draw on side views
// R_DrawPlayerSprites ();
}