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raze-gles/source/build/src/clip.cpp

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// "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman
// Ken Silverman's official web site: "http://www.advsys.net/ken"
// See the included license file "BUILDLIC.TXT" for license info.
//
// This file has been modified from Ken Silverman's original release
// by Jonathon Fowler (jf@jonof.id.au)
// by the EDuke32 team (development@voidpoint.com)
#include "a.h"
#include "build.h"
#include "baselayer.h"
#include "engine_priv.h"
int16_t clipnum;
linetype clipit[MAXCLIPNUM];
int32_t clipsectnum, origclipsectnum, clipspritenum;
int16_t clipsectorlist[MAXCLIPSECTORS], origclipsectorlist[MAXCLIPSECTORS];
#ifdef HAVE_CLIPSHAPE_FEATURE
int16_t clipspritelist[MAXCLIPNUM]; // sector-like sprite clipping
#endif
static int16_t clipobjectval[MAXCLIPNUM];
////// sector-like clipping for sprites //////
#ifdef HAVE_CLIPSHAPE_FEATURE
void engineSetClipMap(mapinfo_t *bak, mapinfo_t *newmap)
{
if (bak)
{
bak->numsectors = numsectors;
bak->numwalls = numwalls;
bak->sector = (usectortype *) sector;
bak->wall = (uwalltype *) wall;
}
if (newmap)
{
numsectors = newmap->numsectors;
numwalls = newmap->numwalls;
sector = (sectortype *) newmap->sector;
wall = (walltype *) newmap->wall;
}
}
mapinfo_t origmapinfo, clipmapinfo;
int32_t quickloadboard=0;
clipinfo_t clipinfo[CM_MAX];
static int32_t numclipmaps;
static int32_t numclipsects; // number in sectq[]
static int16_t *sectoidx;
int16_t *sectq; // [numsectors]
int16_t pictoidx[MAXTILES]; // maps tile num to clipinfo[] index
static int16_t *tempictoidx;
static usectortype *loadsector;
static uwalltype *loadwall, *loadwallinv;
static uspritetype *loadsprite;
static vec2_t const hitscangoal = { (1<<29)-1, (1<<29)-1 };
#ifdef USE_OPENGL
int32_t hitallsprites = 0;
#endif
void engineInitClipMaps()
{
numclipmaps = 0;
numclipsects = 0;
DO_FREE_AND_NULL(sectq);
DO_FREE_AND_NULL(sectoidx);
DO_FREE_AND_NULL(tempictoidx);
DO_FREE_AND_NULL(loadsector);
DO_FREE_AND_NULL(loadwall);
DO_FREE_AND_NULL(loadwallinv);
DO_FREE_AND_NULL(loadsprite);
// two's complement trick, -1 = 0xff
Bmemset(&pictoidx, -1, sizeof(pictoidx));
Bmemset(&clipmapinfo, 0, sizeof(mapinfo_t));
numsectors = 0;
numwalls = 0;
}
// loads the clip maps.
// this should be called before any real map is loaded.
int32_t engineLoadClipMaps(void)
{
int32_t i, k, w;
int32_t lwcp = 0;
size_t fi;
size_t const g_clipMapFilesNum = g_clipMapFiles.size();
int32_t *fisec = NULL;
int32_t *fispr = NULL;
int32_t ournumsectors=0, ournumwalls=0, ournumsprites=0;
engineInitClipMaps();
loadsector = (usectortype *) Xmalloc(MAXSECTORS * sizeof(sectortype));
loadwall = (uwalltype *) Xmalloc(MAXWALLS * sizeof(walltype));
loadsprite = (uspritetype *) Xmalloc(MAXSPRITES * sizeof(spritetype));
if (g_clipMapFilesNum)
{
fisec = (int32_t *) Xcalloc(g_clipMapFilesNum, sizeof(int32_t));
fispr = (int32_t *) Xcalloc(g_clipMapFilesNum, sizeof(int32_t));
}
quickloadboard = 1;
for (fi = 0; fi < g_clipMapFilesNum; ++fi)
{
int16_t ang, cs;
vec3_t tmppos;
fisec[fi] = ournumsectors;
fispr[fi] = ournumsprites;
i = engineLoadBoard(g_clipMapFiles[fi], 8, &tmppos, &ang, &cs);
if (i<0)
continue;
// Numsprites will now be set!
initprintf("Loading clip map: %s\n", g_clipMapFiles[fi]);
if (ournumsectors+numsectors>MAXSECTORS ||
ournumwalls+numwalls>MAXWALLS ||
ournumsprites+Numsprites>MAXSPRITES)
{
initprintf("clip map: warning: exceeded limits when loading %s, aborting.\n", g_clipMapFiles[fi]);
break;
}
Bmemcpy(loadsector+ournumsectors, sector, numsectors*sizeof(sectortype));
Bmemcpy(loadwall+ournumwalls, wall, numwalls*sizeof(walltype));
Bmemcpy(loadsprite+ournumsprites, sprite, Numsprites*sizeof(spritetype));
for (i=ournumsectors; i<ournumsectors+numsectors; i++)
loadsector[i].wallptr += ournumwalls;
for (i=ournumwalls; i<ournumwalls+numwalls; i++)
{
if (loadwall[i].point2>=0)
loadwall[i].point2 += ournumwalls;
if (loadwall[i].nextwall>=0)
{
loadwall[i].nextwall += ournumwalls;
loadwall[i].nextsector += ournumsectors;
}
}
for (i=ournumsprites; i<ournumsprites+Numsprites; i++)
if (loadsprite[i].sectnum>=0)
loadsprite[i].sectnum += ournumsectors;
ournumsectors += numsectors;
ournumwalls += numwalls;
ournumsprites += Numsprites;
++lwcp;
}
quickloadboard = 0;
if (ournumsectors==0 || ournumwalls==0 || ournumsprites==0) // nothing loaded
{
engineInitClipMaps();
Bfree(fisec);
Bfree(fispr);
return -1;
}
// shrink
loadsector = (usectortype *) Xrealloc(loadsector, ournumsectors*sizeof(sectortype));
loadwall = (uwalltype *) Xrealloc(loadwall, ournumwalls*sizeof(walltype));
Bmemcpy(sector, loadsector, ournumsectors*sizeof(sectortype));
Bmemcpy(wall, loadwall, ournumwalls*sizeof(walltype));
Bmemcpy(sprite, loadsprite, ournumsprites*sizeof(spritetype));
numsectors = ournumsectors;
numwalls = ournumwalls;
// vvvv don't use headsprite[sect,stat]! vvvv
sectoidx = (int16_t *) Xmalloc(numsectors*sizeof(sectoidx[0]));
for (i=0; i<numsectors; i++)
sectoidx[i] = CM_NONE;
// determine outer sectors
for (i=0; i<numsectors; i++)
{
for (w=sector[i].wallptr; w<sector[i].wallptr+sector[i].wallnum; w++)
if (wall[w].nextsector<0)
{
sectoidx[i] = CM_OUTER;
break;
}
}
// break connections between outer sectors
for (i=0; i<numsectors; i++)
{
if (sectoidx[i] == CM_OUTER)
for (w=sector[i].wallptr; w<sector[i].wallptr+sector[i].wallnum; w++)
{
k = wall[w].nextwall;
if (k>=0 && sectoidx[wall[w].nextsector]==CM_OUTER)
{
wall[k].nextwall = wall[k].nextsector = -1;
wall[w].nextwall = wall[w].nextsector = -1;
}
}
}
{
int16_t ns, outersect;
int32_t pn, scnt, x, y, z, maxdist;
sectq = (int16_t *) Xmalloc(numsectors*sizeof(sectq[0]));
tempictoidx = (int16_t *) Xmalloc(MAXTILES*sizeof(tempictoidx[0]));
for (i=0; i<MAXTILES; i++)
tempictoidx[i]=-1;
// collect sprite picnums
for (i=0; i<MAXSPRITES && sprite[i].statnum<MAXSTATUS; i++)
{
pn = sprite[i].picnum;
k = sprite[i].sectnum;
// -v- note the <= ignore sprites in outer sectors
if (pn<=0 || pn>=MAXTILES || k<0 || k>=numsectors || (sectoidx[k]&CM_OUTER))
continue;
if (numclipmaps >= CM_MAX)
{
initprintf("warning: reached max clip map number %d, not processing any more\n", CM_MAX);
break;
}
// chain
if (pictoidx[pn]>=0)
{
if (sectoidx[k]&CM_SOME)
{
for (fi = 0; fi < g_clipMapFilesNum; ++fi)
if (k>=fisec[fi])
break;
initprintf("clip map \"%s\": error: tried to chain picnum %d (sprite %d) in sector %d which"
" already belongs to picnum %d.\n", g_clipMapFiles[fi], pn, i-fispr[fi], k-fisec[fi],
clipinfo[sectoidx[k]].picnum);
engineInitClipMaps();
Bfree(fisec);
Bfree(fispr);
return 2;
}
// new one is front
clipinfo[numclipmaps].next = pictoidx[pn];
pictoidx[pn] = numclipmaps;
}
else
{
clipinfo[numclipmaps].next = -1;
pictoidx[pn] = numclipmaps;
}
if (!CM_NOROT(i))
{
if (sprite[i].ang!=1536 && sprite[i].ang!=512)
{
for (fi = 0; fi < g_clipMapFilesNum; ++fi)
if (i>=fispr[fi])
break;
initprintf("clip map \"%s\": warning: sprite %d pointing neither northward nor southward. %s will be wrong.\n",
g_clipMapFiles[fi], i-fispr[fi], (sprite[i].cstat&48)==32 ? "Scaling and flipping" : "X-flipping");
}
}
clipinfo[numclipmaps].picnum = pn;
// collect sectors
scnt = numclipsects;
sectq[numclipsects++] = k;
sectoidx[k] = numclipmaps;
clipinfo[numclipmaps].qbeg = scnt;
outersect = -1;
do
{
k = sectq[scnt];
for (w=sector[k].wallptr; w<sector[k].wallptr+sector[k].wallnum; w++)
{
ns = wall[w].nextsector;
if (ns>=0)
{
if (sectoidx[ns]==CM_NONE)
{
sectoidx[ns] = numclipmaps;
sectq[numclipsects++] = ns;
}
else if (sectoidx[ns]&CM_OUTER)
{
if (outersect>=0 && ns!=outersect)
{
for (fi = 0; fi < g_clipMapFilesNum; ++fi)
if (ns>=fisec[fi])
break;
initprintf("clip map \"%s\": error: encountered more than one outer sector (%d and %d)"
" for sprite %d.\n", g_clipMapFiles[fi], outersect-fisec[fi], ns-fisec[fi], i-fispr[fi]);
engineInitClipMaps();
Bfree(fisec);
Bfree(fispr);
return 3;
}
outersect = ns;
sectoidx[outersect] |= numclipmaps;
}
else if (sectoidx[ns]!=numclipmaps)
{
for (fi = 0; fi < g_clipMapFilesNum; ++fi)
if (ns>=fisec[fi])
break;
initprintf("clip map \"%s\": error: encountered sector %d belonging to index %d"
" while collecting sectors for sprite %d (index %d).\n",
g_clipMapFiles[fi], ns-fisec[fi], sectoidx[ns], i-fispr[fi], numclipmaps);
engineInitClipMaps();
Bfree(fisec);
Bfree(fispr);
return 4;
}
}
}
} while (++scnt < numclipsects);
if (outersect==-1)
{
initprintf("clip map: INTERNAL ERROR: outersect==-1!\n");
engineInitClipMaps();
Bfree(fisec);
Bfree(fispr);
return 5;
}
sectq[numclipsects++] = outersect; // last is outer
clipinfo[numclipmaps].qend = numclipsects-1;
// normalize
maxdist = 0;
for (scnt=clipinfo[numclipmaps].qbeg; scnt<=clipinfo[numclipmaps].qend; scnt++)
{
k = sectq[scnt];
x = sprite[i].x;
y = sprite[i].y;
z = sprite[i].z;
sector[k].floorz -= z;
sector[k].ceilingz -= z;
if (scnt==clipinfo[numclipmaps].qbeg)
{
// backup sprite tags since we'll discard sprites later
sector[k].CM_XREPEAT = sprite[i].xrepeat;
sector[k].CM_YREPEAT = sprite[i].yrepeat;
sector[k].CM_XOFFSET = sprite[i].xoffset;
sector[k].CM_YOFFSET = sprite[i].yoffset;
sector[k].CM_CSTAT = sprite[i].cstat;
sector[k].CM_ANG = sprite[i].ang;
}
// backup floor and ceiling z
CM_FLOORZ(k) = sector[k].floorz;
CM_CEILINGZ(k) = sector[k].ceilingz;
for (w=sector[k].wallptr; w<sector[k].wallptr+sector[k].wallnum; w++)
{
wall[w].x -= x;
wall[w].y -= y;
if (scnt!=clipinfo[numclipmaps].qend)
{
if (CM_NOROT(i))
{
if (klabs(wall[w].x) > maxdist)
maxdist = klabs(wall[w].x);
if (klabs(wall[w].y) > maxdist)
maxdist = klabs(wall[w].y);
}
else
{
int32_t tmp = ksqrt(uhypsq(wall[w].x, wall[w].y));
if (tmp > maxdist)
maxdist = tmp;
}
}
// aliasing
if (wall[w].lotag>0 || wall[w].hitag>0)
{
int32_t ii;
if (wall[w].lotag>0 && wall[w].hitag>0)
{
if (wall[w].lotag > wall[w].hitag)
swapshort(&wall[w].lotag, &wall[w].hitag);
for (ii=wall[w].lotag; ii<wall[w].hitag; ii++)
tempictoidx[ii] = numclipmaps;
}
else if (wall[w].lotag>0)
{
if (wall[w].lotag<MAXTILES)
tempictoidx[wall[w].lotag] = numclipmaps;
}
else
{
if (wall[w].hitag<MAXTILES)
tempictoidx[wall[w].hitag] = numclipmaps;
}
}
CM_WALL_X(w) = wall[w].x;
CM_WALL_Y(w) = wall[w].y;
}
}
clipinfo[numclipmaps].maxdist = maxdist;
numclipmaps++;
}
}
// yes, too much copying, but better than ugly code
Bmemcpy(loadsector, sector, ournumsectors*sizeof(sectortype));
Bmemcpy(loadwall, wall, ournumwalls*sizeof(walltype));
// loadwallinv will contain all walls with inverted orientation for x/y-flip handling
loadwallinv = (uwalltype *) Xmalloc(ournumwalls*sizeof(walltype));
{
int32_t j, loopstart, loopend, numloopwalls;
// invert walls!
loopstart = 0;
for (j=0; j<ournumwalls; j++)
{
wall[j].nextsector = wall[j].nextwall = -1;
if (wall[j].point2 < j)
{
loopend = j+1;
numloopwalls = loopend-loopstart;
if (numloopwalls<3)
{
loopstart = loopend;
continue;
}
for (k=0; k<numloopwalls; k++)
{
wall[loopstart+k].x = loadwall[loopstart + (numloopwalls+1-k)%numloopwalls].x;
wall[loopstart+k].y = loadwall[loopstart + (numloopwalls+1-k)%numloopwalls].y;
CM_WALL_X(loopstart+k) = wall[loopstart+k].x;
CM_WALL_Y(loopstart+k) = wall[loopstart+k].y;
}
loopstart = loopend;
}
}
// reconstruct wall connections
for (i=0; i<ournumsectors; i++)
{
for (j=sector[i].wallptr; j<sector[i].wallptr+sector[i].wallnum; j++)
checksectorpointer(j, i);
}
}
Bmemcpy(loadwallinv, wall, ournumwalls*sizeof(walltype));
clipmapinfo.numsectors = numsectors;
clipmapinfo.sector = loadsector;
clipmapinfo.numwalls = numwalls;
clipmapinfo.wall = loadwall;
for (i=0; i<MAXTILES; i++)
{
if (pictoidx[i]==-1 && tempictoidx[i]>=0)
pictoidx[i]=tempictoidx[i];
}
DO_FREE_AND_NULL(loadsprite);
DO_FREE_AND_NULL(tempictoidx);
// don't let other code be distracted by the temporary map we constructed
numsectors = 0;
numwalls = 0;
initspritelists();
if (lwcp > 0)
initprintf("Loaded clip map%s.\n", lwcp==1 ? "" : "s");
Bfree(fisec);
Bfree(fispr);
return 0;
}
int clipshape_idx_for_sprite(uspritetype const * const curspr, int curidx)
{
// per-sprite init
curidx = (curidx < 0) ? pictoidx[curspr->picnum] : clipinfo[curidx].next;
while (curidx >= 0 && (curspr->cstat & 32) != (sector[sectq[clipinfo[curidx].qbeg]].CM_CSTAT & 32))
curidx = clipinfo[curidx].next;
return curidx;
}
#else
int32_t clipshape_idx_for_sprite(uspritetype const * const curspr, int32_t curidx)
{
(void)curspr;
UNREFERENCED_PARAMETER(curidx);
return -1;
}
#endif // HAVE_CLIPSHAPE_FEATURE
////// //////
////////// CLIPMOVE //////////
int32_t clipmoveboxtracenum = 3;
//
// clipinsidebox
//
int clipinsidebox(vec2_t *vect, int wallnum, int walldist)
{
int const r = walldist << 1;
auto const * wal = (uwalltype *)&wall[wallnum];
vec2_t const v1 = { wal->x + walldist - vect->x, wal->y + walldist - vect->y };
wal = (uwalltype *)&wall[wal->point2];
vec2_t v2 = { wal->x + walldist - vect->x, wal->y + walldist - vect->y };
if (((v1.x < 0) && (v2.x < 0)) || ((v1.y < 0) && (v2.y < 0)) || ((v1.x >= r) && (v2.x >= r)) || ((v1.y >= r) && (v2.y >= r)))
return 0;
v2.x -= v1.x; v2.y -= v1.y;
if (v2.x * (walldist - v1.y) >= v2.y * (walldist - v1.x)) // Front
{
v2.x *= ((v2.x > 0) ? (0 - v1.y) : (r - v1.y));
v2.y *= ((v2.y > 0) ? (r - v1.x) : (0 - v1.x));
return v2.x < v2.y;
}
v2.x *= ((v2.x > 0) ? (r - v1.y) : (0 - v1.y));
v2.y *= ((v2.y > 0) ? (0 - v1.x) : (r - v1.x));
return (v2.x >= v2.y) << 1;
}
//
// clipinsideboxline
//
int clipinsideboxline(int x, int y, int x1, int y1, int x2, int y2, int walldist)
{
int const r = walldist << 1;
x1 += walldist - x;
x2 += walldist - x;
if (((x1 < 0) && (x2 < 0)) || ((x1 >= r) && (x2 >= r)))
return 0;
y1 += walldist - y;
y2 += walldist - y;
if (((y1 < 0) && (y2 < 0)) || ((y1 >= r) && (y2 >= r)))
return 0;
x2 -= x1;
y2 -= y1;
if (x2 * (walldist - y1) >= y2 * (walldist - x1)) // Front
{
x2 *= ((x2 > 0) ? (0 - y1) : (r - y1));
y2 *= ((y2 > 0) ? (r - x1) : (0 - x1));
return x2 < y2;
}
x2 *= ((x2 > 0) ? (r - y1) : (0 - y1));
y2 *= ((y2 > 0) ? (0 - x1) : (r - x1));
return (x2 >= y2) << 1;
}
#ifdef HAVE_CLIPSHAPE_FEATURE
int32_t clipsprite_try(uspritetype const * const spr, int32_t xmin, int32_t ymin, int32_t xmax, int32_t ymax)
{
// try and see whether this sprite's picnum has sector-like clipping data
int32_t i = pictoidx[spr->picnum];
// handle sector-like floor sprites separately
while (i>=0 && (spr->cstat&32) != (clipmapinfo.sector[sectq[clipinfo[i].qbeg]].CM_CSTAT&32))
i = clipinfo[i].next;
if (i>=0)
{
int32_t maxcorrection = clipinfo[i].maxdist;
const int32_t k = sectq[clipinfo[i].qbeg];
if ((spr->cstat&CSTAT_SPRITE_ALIGNMENT)!=CSTAT_SPRITE_ALIGNMENT_FLOOR)
{
int32_t const tempint1 = clipmapinfo.sector[k].CM_XREPEAT;
maxcorrection = divideu32_noinline(maxcorrection * (int32_t) spr->xrepeat, tempint1);
}
else
{
int32_t const tempint1 = clipmapinfo.sector[k].CM_XREPEAT;
int32_t const tempint2 = clipmapinfo.sector[k].CM_YREPEAT;
maxcorrection = max(divideu32_noinline(maxcorrection * (int32_t) spr->xrepeat, tempint1),
divideu32_noinline(maxcorrection * (int32_t) spr->yrepeat, tempint2));
}
maxcorrection -= MAXCLIPDIST;
if ((spr->x < xmin - maxcorrection) || (spr->y < ymin - maxcorrection) ||
(spr->x > xmax + maxcorrection) || (spr->y > ymax + maxcorrection))
return 1;
if (clipspritenum < MAXCLIPNUM)
clipspritelist[clipspritenum++] = spr-(uspritetype *)sprite;
//initprintf("%d: clip sprite[%d]\n",clipspritenum,j);
return 1;
}
return 0;
}
static int32_t clipmove_warned;
static void addclipsect(int const sectnum)
{
if (EDUKE32_PREDICT_TRUE(clipsectnum < MAXCLIPSECTORS))
clipsectorlist[clipsectnum++] = sectnum;
else if (!clipmove_warned)
{
OSD_Printf("!!clipsectnum\n");
clipmove_warned = 1;
}
}
// return: -1 if curspr has x-flip xor y-flip (in the horizontal map plane!), 1 else
int32_t clipsprite_initindex(int32_t curidx, uspritetype const * const curspr, int32_t *clipsectcnt, const vec3_t *vect)
{
int32_t k, daz = curspr->z;
int32_t scalex, scaley, scalez, flipx, flipy;
int32_t flipmul=1;
const int32_t j = sectq[clipinfo[curidx].qbeg];
const int32_t tempint1 = sector[j].CM_XREPEAT;
const int32_t tempint2 = sector[j].CM_YREPEAT;
const int32_t rotang = (curspr->ang - sector[j].CM_ANG)&2047;
const int32_t dorot = !CM_NOROTS(j);
if ((curspr->cstat&CSTAT_SPRITE_ALIGNMENT)!=CSTAT_SPRITE_ALIGNMENT_FLOOR) // face/wall sprite
{
scalex = scaley = divscale22(curspr->xrepeat, tempint1);
scalez = divscale22(curspr->yrepeat, tempint2);
flipx = 1-((curspr->cstat&4)>>1);
flipy = 1;
}
else
{
scalex = divscale22(curspr->xrepeat, tempint1);
scaley = divscale22(curspr->yrepeat, tempint2);
scalez = scalex;
flipx = 1-((curspr->cstat&4)>>1);
flipy = 1-((curspr->cstat&8)>>2);
}
if (dorot)
{
flipmul = flipx*flipy;
if (flipmul==-1)
wall = (walltype *) loadwallinv;
}
if ((curspr->cstat&128) != (sector[j].CM_CSTAT&128))
daz += (((curspr->cstat&128)>>6)-1)*((tilesiz[curspr->picnum].y*curspr->yrepeat)<<1);
*clipsectcnt = clipsectnum = 0;
// init sectors for this index
for (k=clipinfo[curidx].qbeg; k<=clipinfo[curidx].qend; k++)
{
int32_t const j = sectq[k];
auto const sec = (usectortype *)&sector[j];
int32_t const startwall = sec->wallptr, endwall = startwall+sec->wallnum;
sec->floorz = daz + mulscale22(scalez, CM_FLOORZ(j));
sec->ceilingz = daz + mulscale22(scalez, CM_CEILINGZ(j));
//initprintf("sec %d: f=%d, c=%d\n", j, sec->floorz, sec->ceilingz);
for (int w=startwall; w<endwall; w++)
{
auto wal=(uwalltype *)&wall[startwall];
wal->x = mulscale22(scalex, CM_WALL_X(w));
wal->y = mulscale22(scaley, CM_WALL_Y(w));
if (dorot)
{
wal->x *= flipx;
wal->y *= flipy;
rotatepoint(zerovec, *(vec2_t *) wal, rotang, (vec2_t *) wal);
}
wal->x += curspr->x;
wal->y += curspr->y;
}
if (inside(vect->x, vect->y, j)==1)
addclipsect(j);
}
// add outer sector if not inside inner ones
if (clipsectnum==0)
addclipsect(sectq[k-1]);
return flipmul;
}
#endif
static void addclipline(int32_t dax1, int32_t day1, int32_t dax2, int32_t day2, int32_t daoval)
{
if (clipnum < MAXCLIPNUM)
{
clipit[clipnum].x1 = dax1; clipit[clipnum].y1 = day1;
clipit[clipnum].x2 = dax2; clipit[clipnum].y2 = day2;
clipobjectval[clipnum] = daoval;
clipnum++;
}
else if (!clipmove_warned)
{
initprintf("!!clipnum\n");
clipmove_warned = 2;
}
}
static FORCE_INLINE void clipmove_tweak_pos(const vec3_t *pos, int32_t gx, int32_t gy, int32_t x1, int32_t y1, int32_t x2,
int32_t y2, int32_t *daxptr, int32_t *dayptr)
{
int32_t daz;
if (rintersect(pos->x, pos->y, 0, gx, gy, 0, x1, y1, x2, y2, daxptr, dayptr, &daz) == -1)
{
*daxptr = pos->x;
*dayptr = pos->y;
}
}
// Returns: should clip?
static int32_t check_floor_curb(int32_t dasect, int32_t nextsect, int32_t flordist, int32_t posz,
int32_t dax, int32_t day)
{
auto const sec2 = (usectortype *)&sector[nextsect];
int32_t const daz2 = getflorzofslope(nextsect, dax, day);
return ((sec2->floorstat&1) == 0 && // parallaxed floor curbs don't clip
posz >= daz2-(flordist-1) && // also account for desired z distance tolerance
daz2 < getflorzofslope(dasect, dax, day)-(1<<8)); // curbs less tall than 256 z units don't clip
}
int32_t clipmovex(vec3_t *pos, int16_t *sectnum,
int32_t xvect, int32_t yvect,
int32_t walldist, int32_t ceildist, int32_t flordist, uint32_t cliptype,
uint8_t noslidep)
{
const int32_t oboxtracenum = clipmoveboxtracenum;
if (noslidep)
clipmoveboxtracenum = 1;
int32_t ret = clipmove(pos, sectnum, xvect, yvect,
walldist, ceildist, flordist, cliptype);
clipmoveboxtracenum = oboxtracenum;
return ret;
}
//
// raytrace (internal)
//
static inline int32_t raytrace(int32_t x3, int32_t y3, int32_t *x4, int32_t *y4)
{
int32_t hitwall = -1;
for (bssize_t z=clipnum-1; z>=0; z--)
{
const int32_t x1 = clipit[z].x1, x2 = clipit[z].x2, x21 = x2-x1;
const int32_t y1 = clipit[z].y1, y2 = clipit[z].y2, y21 = y2-y1;
int32_t topu = x21*(y3-y1) - (x3-x1)*y21;
if (topu <= 0)
continue;
if (x21*(*y4-y1) > (*x4-x1)*y21)
continue;
const int32_t x43 = *x4-x3;
const int32_t y43 = *y4-y3;
if (x43*(y1-y3) > (x1-x3)*y43)
continue;
if (x43*(y2-y3) <= (x2-x3)*y43)
continue;
const int32_t bot = x43*y21 - x21*y43;
if (bot == 0)
continue;
bssize_t cnt = 256, nintx, ninty;
do
{
cnt--; if (cnt < 0) { *x4 = x3; *y4 = y3; return z; }
nintx = x3 + scale(x43, topu, bot);
ninty = y3 + scale(y43, topu, bot);
topu--;
} while (x21*(ninty-y1) <= (nintx-x1)*y21);
if (klabs(x3-nintx)+klabs(y3-ninty) < klabs(x3-*x4)+klabs(y3-*y4))
{
*x4 = nintx; *y4 = ninty; hitwall = z;
}
}
return hitwall;
}
//
// keepaway (internal)
//
static inline void keepaway(int32_t *x, int32_t *y, int32_t w)
{
const int32_t x1 = clipit[w].x1, dx = clipit[w].x2-x1;
const int32_t y1 = clipit[w].y1, dy = clipit[w].y2-y1;
const int32_t ox = ksgn(-dy), oy = ksgn(dx);
char first = (klabs(dx) <= klabs(dy));
do
{
if (dx*(*y-y1) > (*x-x1)*dy)
return;
if (first == 0)
*x += ox;
else
*y += oy;
first ^= 1;
}
while (1);
}
static int32_t get_floorspr_clipyou(int32_t x1, int32_t x2, int32_t x3, int32_t x4,
int32_t y1, int32_t y2, int32_t y3, int32_t y4)
{
int32_t clipyou = 0;
if ((y1^y2) < 0)
{
if ((x1^x2) < 0) clipyou ^= (x1*y2 < x2*y1)^(y1<y2);
else if (x1 >= 0) clipyou ^= 1;
}
if ((y2^y3) < 0)
{
if ((x2^x3) < 0) clipyou ^= (x2*y3 < x3*y2)^(y2<y3);
else if (x2 >= 0) clipyou ^= 1;
}
if ((y3^y4) < 0)
{
if ((x3^x4) < 0) clipyou ^= (x3*y4 < x4*y3)^(y3<y4);
else if (x3 >= 0) clipyou ^= 1;
}
if ((y4^y1) < 0)
{
if ((x4^x1) < 0) clipyou ^= (x4*y1 < x1*y4)^(y4<y1);
else if (x4 >= 0) clipyou ^= 1;
}
return clipyou;
}
int sectoradjacent(int sect1, int sect2)
{
if (sector[sect1].wallnum > sector[sect2].wallnum)
swaplong(&sect1, &sect2);
for (int i = 0; i < sector[sect1].wallnum; i++)
if (wall[sector[sect1].wallptr+i].nextsector == sect2)
return 1;
return 0;
}
static void clipupdatesector(int32_t const x, int32_t const y, int16_t *const sectnum)
{
if (inside_p(x, y, *sectnum))
return;
static int16_t sectlist[MAXCLIPSECTORS];
static uint8_t sectbitmap[MAXCLIPSECTORS >> 3];
int32_t nsecs;
bfirst_search_init(sectlist, sectbitmap, &nsecs, numsectors, *sectnum);
for (int sectcnt = 0; sectcnt < nsecs; sectcnt++)
{
if (inside_p(x, y, sectlist[sectcnt]))
SET_AND_RETURN(*sectnum, sectlist[sectcnt]);
auto const sec = &sector[sectlist[sectcnt]];
int const startwall = sec->wallptr;
int const endwall = sec->wallptr + sec->wallnum;
for (int j = startwall; j < endwall; j++)
if (wall[j].nextsector >= 0)
{
for (int k = 0; k < clipsectnum; k++)
if (clipsectorlist[k] == wall[j].nextsector)
{
bfirst_search_try(sectlist, sectbitmap, &nsecs, wall[j].nextsector);
break;
}
}
}
*sectnum = -1;
}
//
// clipmove
//
int32_t clipmove(vec3_t *pos, int16_t *sectnum, int32_t xvect, int32_t yvect,
int32_t walldist, int32_t ceildist, int32_t flordist, uint32_t cliptype)
{
if ((xvect|yvect) == 0 || *sectnum < 0)
return 0;
uspritetype const * curspr=NULL; // non-NULL when handling sprite with sector-like clipping
int32_t const dawalclipmask = (cliptype & 65535); // CLIPMASK0 = 0x00010001
int32_t const dasprclipmask = (cliptype >> 16); // CLIPMASK1 = 0x01000040
vec2_t const move = { xvect, yvect };
vec2_t goal = { pos->x + (xvect >> 14), pos->y + (yvect >> 14) };
vec2_t const cent = { (pos->x + goal.x) >> 1, (pos->y + goal.y) >> 1 };
//Extra walldist for sprites on sector lines
vec2_t const diff = { goal.x - (pos->x), goal.y - (pos->y) };
int32_t const rad = nsqrtasm(uhypsq(diff.x, diff.y)) + MAXCLIPDIST + walldist + 8;
vec2_t const clipMin = { cent.x - rad, cent.y - rad };
vec2_t const clipMax = { cent.x + rad, cent.y + rad };
int clipshapeidx = -1;
int clipsectcnt = 0;
int clipspritecnt = 0;
clipsectorlist[0] = *sectnum;
clipsectnum = 1;
clipnum = 0;
clipspritenum = 0;
clipmove_warned = 0;
do
{
#ifdef HAVE_CLIPSHAPE_FEATURE
if (clipsectcnt>=clipsectnum)
{
// one bunch of sectors completed (either the very first
// one or a sector-like sprite one), prepare the next
//initprintf("init sprite %d\n", clipspritecnt);
if (!curspr)
{
// init sector-like sprites for clipping
origclipsectnum = clipsectnum;
Bmemcpy(origclipsectorlist, clipsectorlist, clipsectnum*sizeof(clipsectorlist[0]));
// replace sector and wall with clip map
engineSetClipMap(&origmapinfo, &clipmapinfo);
}
curspr = (uspritetype *)&sprite[clipspritelist[clipspritecnt]];
clipshapeidx = clipshape_idx_for_sprite(curspr, clipshapeidx);
if (clipshapeidx < 0)
{
clipspritecnt++;
continue;
}
clipsprite_initindex(clipshapeidx, curspr, &clipsectcnt, pos);
}
#endif
int const dasect = clipsectorlist[clipsectcnt++];
//if (curspr)
// initprintf("sprite %d/%d: sect %d/%d (%d)\n", clipspritecnt,clipspritenum, clipsectcnt,clipsectnum,dasect);
////////// Walls //////////
auto const sec = (usectortype *)&sector[dasect];
int const startwall = sec->wallptr;
int const endwall = startwall + sec->wallnum;
for (native_t j=startwall; j<endwall; j++)
{
auto const wal = (uwalltype *)&wall[j];
auto const wal2 = (uwalltype *)&wall[wal->point2];
if ((wal->x < clipMin.x && wal2->x < clipMin.x) || (wal->x > clipMax.x && wal2->x > clipMax.x) ||
(wal->y < clipMin.y && wal2->y < clipMin.y) || (wal->y > clipMax.y && wal2->y > clipMax.y))
continue;
vec2_t p1 = { wal->x, wal->y };
vec2_t p2 = { wal2->x, wal2->y } ;
vec2_t d = { p2.x-p1.x, p2.y-p1.y };
if (d.x * (pos->y-p1.y) < (pos->x-p1.x) * d.y)
continue; //If wall's not facing you
vec2_t const r = { (d.y > 0) ? clipMax.x : clipMin.x, (d.x > 0) ? clipMin.y : clipMax.y };
vec2_t v = { d.x * (r.y - p1.y), d.y * (r.x - p1.x) };
if (v.x >= v.y)
continue;
int clipyou = 0;
#ifdef HAVE_CLIPSHAPE_FEATURE
if (curspr)
{
if (wal->nextsector>=0)
{
const usectortype *sec2 = (usectortype *)&sector[wal->nextsector];
clipmove_tweak_pos(pos, diff.x, diff.y, p1.x, p1.y, p2.x, p2.y, &v.x, &v.y);
#define CLIPMV_SPR_F_DAZ2 getflorzofslope(wal->nextsector, v.x, v.y)
#define CLIPMV_SPR_F_BASEZ getflorzofslope(sectq[clipinfo[clipshapeidx].qend], v.x, v.y)
if ((sec2->floorstat&1) == 0)
{
if (CLIPMV_SPR_F_DAZ2-(flordist-1) <= pos->z && pos->z <= CLIPMV_SPR_F_BASEZ+(flordist-1))
clipyou = 1;
}
if (clipyou == 0)
{
#define CLIPMV_SPR_C_DAZ2 getceilzofslope(wal->nextsector, v.x, v.y)
#define CLIPMV_SPR_C_BASEZ getceilzofslope(sectq[clipinfo[clipshapeidx].qend], v.x, v.y)
if ((sec2->ceilingstat & 1) == 0)
{
if (CLIPMV_SPR_C_BASEZ-(ceildist-1) <= pos->z && pos->z <= CLIPMV_SPR_C_DAZ2+(ceildist-1))
clipyou = 1;
}
}
}
}
else
#endif
if (wal->nextsector < 0 || (wal->cstat&dawalclipmask))
{
clipyou = 1;
#ifdef YAX_ENABLE
int const cb = yax_getbunch(dasect, YAX_CEILING);
if (cb >= 0 && (sec->ceilingstat & yax_waltosecmask(dawalclipmask)) == 0)
{
int const ynw = yax_getnextwall(j, YAX_CEILING);
if (ynw >= 0 && wall[ynw].nextsector >= 0 && (wall[ynw].cstat & dawalclipmask) == 0)
{
clipmove_tweak_pos(pos, diff.x, diff.y, p1.x, p1.y, p2.x, p2.y, &v.x, &v.y);
clipyou = check_floor_curb(dasect, wall[ynw].nextsector, flordist, pos->z, v.x, v.y);
}
}
#endif
}
else if (editstatus == 0)
{
clipmove_tweak_pos(pos, diff.x, diff.y, p1.x, p1.y, p2.x, p2.y, &v.x, &v.y);
clipyou = check_floor_curb(dasect, wal->nextsector, flordist, pos->z, v.x, v.y);
if (clipyou == 0)
{
const usectortype *sec2 = (usectortype *)&sector[wal->nextsector];
int32_t daz2 = getceilzofslope(wal->nextsector, v.x, v.y);
clipyou = ((sec2->ceilingstat&1) == 0 &&
pos->z <= daz2+(ceildist-1) &&
daz2 > getceilzofslope(dasect, v.x, v.y)+(1<<8));
}
}
// We're not interested in any sector reached by portal traversal that we're "inside" of.
if (!curspr && clipsectcnt != 1 && inside(pos->x, pos->y, dasect) == 1) break;
else if (clipyou)
{
int16_t const objtype = curspr ? (int16_t)(curspr - (uspritetype *)sprite) + 49152 : j + 32768;
//Add 2 boxes at endpoints
int32_t bsz = walldist; if (diff.x < 0) bsz = -bsz;
addclipline(p1.x-bsz, p1.y-bsz, p1.x-bsz, p1.y+bsz, objtype);
addclipline(p2.x-bsz, p2.y-bsz, p2.x-bsz, p2.y+bsz, objtype);
bsz = walldist; if (diff.y < 0) bsz = -bsz;
addclipline(p1.x+bsz, p1.y-bsz, p1.x-bsz, p1.y-bsz, objtype);
addclipline(p2.x+bsz, p2.y-bsz, p2.x-bsz, p2.y-bsz, objtype);
v.x = walldist; if (d.y > 0) v.x = -v.x;
v.y = walldist; if (d.x < 0) v.y = -v.y;
addclipline(p1.x+v.x, p1.y+v.y, p2.x+v.x, p2.y+v.y, objtype);
}
else if (wal->nextsector>=0)
{
if (!curspr && inside(pos->x, pos->y, wal->nextsector) == 1) continue;
int i;
for (i=clipsectnum-1; i>=0; i--)
if (wal->nextsector == clipsectorlist[i]) break;
if (i < 0) addclipsect(wal->nextsector);
}
}
////////// Sprites //////////
if (dasprclipmask==0)
continue;
#ifdef HAVE_CLIPSHAPE_FEATURE
if (curspr)
continue; // next sector of this index
#endif
for (int j=headspritesect[dasect]; j>=0; j=nextspritesect[j])
{
const uspritetype *const spr = (uspritetype *)&sprite[j];
const int32_t cstat = spr->cstat;
if ((cstat&dasprclipmask) == 0)
continue;
#ifdef HAVE_CLIPSHAPE_FEATURE
if (clipsprite_try(spr, clipMin.x, clipMin.y, clipMax.x, clipMax.y))
continue;
#endif
vec2_t p1 = *(vec2_t const *)spr;
switch (cstat & (CSTAT_SPRITE_ALIGNMENT_WALL | CSTAT_SPRITE_ALIGNMENT_FLOOR))
{
case CSTAT_SPRITE_ALIGNMENT_FACING:
if (p1.x >= clipMin.x && p1.x <= clipMax.x && p1.y >= clipMin.y && p1.y <= clipMax.y)
{
int32_t height, daz = spr->z+spriteheightofs(j, &height, 1);
if (pos->z > daz-height-flordist && pos->z < daz+ceildist)
{
int32_t bsz = (spr->clipdist << 2)+walldist;
if (diff.x < 0) bsz = -bsz;
addclipline(p1.x-bsz, p1.y-bsz, p1.x-bsz, p1.y+bsz, (int16_t)j+49152);
bsz = (spr->clipdist << 2)+walldist;
if (diff.y < 0) bsz = -bsz;
addclipline(p1.x+bsz, p1.y-bsz, p1.x-bsz, p1.y-bsz, (int16_t)j+49152);
}
}
break;
case CSTAT_SPRITE_ALIGNMENT_WALL:
{
int32_t height, daz = spr->z+spriteheightofs(j, &height, 1);
if (pos->z > daz-height-flordist && pos->z < spr->z+ceildist)
{
vec2_t p2;
get_wallspr_points(spr, &p1.x, &p2.x, &p1.y, &p2.y);
if (clipinsideboxline(cent.x, cent.y, p1.x, p1.y, p2.x, p2.y, rad) != 0)
{
vec2_t v = { mulscale14(sintable[(spr->ang+256+512) & 2047], walldist),
mulscale14(sintable[(spr->ang+256) & 2047], walldist) };
if ((p1.x-pos->x) * (p2.y-pos->y) >= (p2.x-pos->x) * (p1.y-pos->y)) // Front
addclipline(p1.x+v.x, p1.y+v.y, p2.x+v.y, p2.y-v.x, (int16_t)j+49152);
else
{
if ((cstat & 64) != 0)
continue;
addclipline(p2.x-v.x, p2.y-v.y, p1.x-v.y, p1.y+v.x, (int16_t)j+49152);
}
//Side blocker
if ((p2.x-p1.x) * (pos->x-p1.x)+(p2.y-p1.y) * (pos->y-p1.y) < 0)
addclipline(p1.x-v.y, p1.y+v.x, p1.x+v.x, p1.y+v.y, (int16_t)j+49152);
else if ((p1.x-p2.x) * (pos->x-p2.x)+(p1.y-p2.y) * (pos->y-p2.y) < 0)
addclipline(p2.x+v.y, p2.y-v.x, p2.x-v.x, p2.y-v.y, (int16_t)j+49152);
}
}
break;
}
case CSTAT_SPRITE_ALIGNMENT_FLOOR:
{
if (pos->z > spr->z-flordist && pos->z < spr->z+ceildist)
{
if ((cstat&64) != 0)
if ((pos->z > spr->z) == ((cstat&8)==0))
continue;
rxi[0] = p1.x;
ryi[0] = p1.y;
get_floorspr_points((uspritetype const *) spr, 0, 0, &rxi[0], &rxi[1], &rxi[2], &rxi[3],
&ryi[0], &ryi[1], &ryi[2], &ryi[3]);
vec2_t v = { mulscale14(sintable[(spr->ang-256+512)&2047], walldist),
mulscale14(sintable[(spr->ang-256)&2047], walldist) };
if ((rxi[0]-pos->x) * (ryi[1]-pos->y) < (rxi[1]-pos->x) * (ryi[0]-pos->y))
{
if (clipinsideboxline(cent.x, cent.y, rxi[1], ryi[1], rxi[0], ryi[0], rad) != 0)
addclipline(rxi[1]-v.y, ryi[1]+v.x, rxi[0]+v.x, ryi[0]+v.y, (int16_t)j+49152);
}
else if ((rxi[2]-pos->x) * (ryi[3]-pos->y) < (rxi[3]-pos->x) * (ryi[2]-pos->y))
{
if (clipinsideboxline(cent.x, cent.y, rxi[3], ryi[3], rxi[2], ryi[2], rad) != 0)
addclipline(rxi[3]+v.y, ryi[3]-v.x, rxi[2]-v.x, ryi[2]-v.y, (int16_t)j+49152);
}
if ((rxi[1]-pos->x) * (ryi[2]-pos->y) < (rxi[2]-pos->x) * (ryi[1]-pos->y))
{
if (clipinsideboxline(cent.x, cent.y, rxi[2], ryi[2], rxi[1], ryi[1], rad) != 0)
addclipline(rxi[2]-v.x, ryi[2]-v.y, rxi[1]-v.y, ryi[1]+v.x, (int16_t)j+49152);
}
else if ((rxi[3]-pos->x) * (ryi[0]-pos->y) < (rxi[0]-pos->x) * (ryi[3]-pos->y))
{
if (clipinsideboxline(cent.x, cent.y, rxi[0], ryi[0], rxi[3], ryi[3], rad) != 0)
addclipline(rxi[0]+v.x, ryi[0]+v.y, rxi[3]+v.y, ryi[3]-v.x, (int16_t)j+49152);
}
}
break;
}
}
}
} while (clipsectcnt < clipsectnum || clipspritecnt < clipspritenum);
#ifdef HAVE_CLIPSHAPE_FEATURE
if (curspr)
{
// restore original map
engineSetClipMap(NULL, &origmapinfo);
clipsectnum = origclipsectnum;
Bmemcpy(clipsectorlist, origclipsectorlist, clipsectnum*sizeof(clipsectorlist[0]));
}
#endif
int32_t hitwalls[4], hitwall;
int32_t clipReturn = 0;
native_t cnt = clipmoveboxtracenum;
do
{
vec2_t vec = goal;
hitwall = raytrace(pos->x, pos->y, &vec.x, &vec.y);
if (hitwall >= 0)
{
vec2_t const clipr = { clipit[hitwall].x2 - clipit[hitwall].x1, clipit[hitwall].y2 - clipit[hitwall].y1 };
uint64_t const tempull = (int64_t)clipr.x * (int64_t)clipr.x + (int64_t)clipr.y * (int64_t)clipr.y;
if (tempull > 0 && tempull < INT32_MAX)
{
int32_t const tempint2 = (int32_t) tempull;
int32_t const tempint1 = (goal.x-vec.x)*clipr.x+(goal.y-vec.y)*clipr.y;
int32_t const i = ((klabs(tempint1)>>11) < tempint2) ? divscale20(tempint1, tempint2) : 0;
goal = { mulscale20(clipr.x, i)+vec.x, mulscale20(clipr.y, i)+vec.y };
}
int32_t const tempint1 = dmulscale6(clipr.x, move.x, clipr.y, move.y);
for (int i=cnt+1, j=hitwalls[i]; i<=clipmoveboxtracenum; j=hitwalls[++i])
{
int32_t const tempint2 = dmulscale6(clipit[j].x2 - clipit[j].x1, move.x, clipit[j].y2 - clipit[j].y1, move.y);
if ((tempint1^tempint2) < 0)
{
clipupdatesector(pos->x, pos->y, sectnum);
return clipReturn;
}
}
keepaway(&goal.x, &goal.y, hitwall);
xvect = (goal.x-vec.x)<<14;
yvect = (goal.y-vec.y)<<14;
if (cnt == clipmoveboxtracenum)
clipReturn = (uint16_t) clipobjectval[hitwall];
hitwalls[cnt] = hitwall;
}
int const osectnum = *sectnum;
clipupdatesector(vec.x, vec.y, sectnum);
if (*sectnum == osectnum || editstatus || (*sectnum != -1 && !check_floor_curb(osectnum, *sectnum, flordist, pos->z, vec.x, vec.y)))
{
pos->x = vec.x;
pos->y = vec.y;
cnt--;
}
else
*sectnum = osectnum;
} while ((xvect|yvect) != 0 && hitwall >= 0 && cnt > 0);
return clipReturn;
}
//
// pushmove
//
int32_t pushmove(vec3_t *vect, int16_t *sectnum,
int32_t walldist, int32_t ceildist, int32_t flordist, uint32_t cliptype)
{
int32_t i, j, k, t, dx, dy, dax, day, daz;
int32_t dir, bad, bad2;
const int32_t dawalclipmask = (cliptype&65535);
// const int32_t dasprclipmask = (cliptype>>16);
if (*sectnum < 0)
return -1;
k = 32;
dir = 1;
do
{
int32_t clipsectcnt;
bad = 0;
clipsectorlist[0] = *sectnum;
clipsectcnt = 0; clipsectnum = 1;
do
{
const uwalltype *wal;
const usectortype *sec;
int32_t startwall, endwall;
#if 0
// Push FACE sprites
for (i=headspritesect[clipsectorlist[clipsectcnt]]; i>=0; i=nextspritesect[i])
{
spr = &sprite[i];
if (((spr->cstat&48) != 0) && ((spr->cstat&48) != 48)) continue;
if ((spr->cstat&dasprclipmask) == 0) continue;
dax = (vect->x)-spr->x; day = (vect->y)-spr->y;
t = (spr->clipdist<<2)+walldist;
if ((klabs(dax) < t) && (klabs(day) < t))
{
daz = spr->z + spriteheightofs(i, &t, 1);
if (((vect->z) < daz+ceildist) && ((vect->z) > daz-t-flordist))
{
t = (spr->clipdist<<2)+walldist;
j = getangle(dax, day);
dx = (sintable[(j+512)&2047]>>11);
dy = (sintable[(j)&2047]>>11);
bad2 = 16;
do
{
vect->x = (vect->x) + dx; vect->y = (vect->y) + dy;
bad2--; if (bad2 == 0) break;
} while ((klabs((vect->x)-spr->x) < t) && (klabs((vect->y)-spr->y) < t));
bad = -1;
k--; if (k <= 0) return bad;
updatesector(vect->x, vect->y, sectnum);
}
}
}
#endif
sec = (usectortype *)&sector[clipsectorlist[clipsectcnt]];
if (dir > 0)
startwall = sec->wallptr, endwall = startwall + sec->wallnum;
else
endwall = sec->wallptr, startwall = endwall + sec->wallnum;
for (i=startwall, wal=(uwalltype *)&wall[startwall]; i!=endwall; i+=dir, wal+=dir)
if (clipinsidebox((vec2_t *)vect, i, walldist-4) == 1)
{
j = 0;
if (wal->nextsector < 0) j = 1;
if (wal->cstat&dawalclipmask) j = 1;
if (j == 0)
{
const usectortype *const sec2 = (usectortype *)&sector[wal->nextsector];
int32_t daz2;
//Find closest point on wall (dax, day) to (vect->x, vect->y)
dax = wall[wal->point2].x-wal->x;
day = wall[wal->point2].y-wal->y;
daz = dax*((vect->x)-wal->x) + day*((vect->y)-wal->y);
if (daz <= 0)
t = 0;
else
{
daz2 = dax*dax+day*day;
if (daz >= daz2) t = (1<<30); else t = divscale30(daz, daz2);
}
dax = wal->x + mulscale30(dax, t);
day = wal->y + mulscale30(day, t);
daz = getflorzofslope(clipsectorlist[clipsectcnt], dax, day);
daz2 = getflorzofslope(wal->nextsector, dax, day);
if ((daz2 < daz-(1<<8)) && ((sec2->floorstat&1) == 0))
if (vect->z >= daz2-(flordist-1)) j = 1;
daz = getceilzofslope(clipsectorlist[clipsectcnt], dax, day);
daz2 = getceilzofslope(wal->nextsector, dax, day);
if ((daz2 > daz+(1<<8)) && ((sec2->ceilingstat&1) == 0))
if (vect->z <= daz2+(ceildist-1)) j = 1;
}
if (j != 0)
{
j = getangle(wall[wal->point2].x-wal->x, wall[wal->point2].y-wal->y);
dx = (sintable[(j+1024)&2047]>>11);
dy = (sintable[(j+512)&2047]>>11);
bad2 = 16;
do
{
vect->x = (vect->x) + dx; vect->y = (vect->y) + dy;
bad2--; if (bad2 == 0) break;
} while (clipinsidebox((vec2_t *)vect, i, walldist-4) != 0);
bad = -1;
k--; if (k <= 0) return bad;
clipupdatesector(vect->x, vect->y, sectnum);
if (*sectnum < 0) return -1;
}
else
{
for (j=clipsectnum-1; j>=0; j--)
if (wal->nextsector == clipsectorlist[j]) break;
if (j < 0) addclipsect(wal->nextsector);
}
}
clipsectcnt++;
} while (clipsectcnt < clipsectnum);
dir = -dir;
} while (bad != 0);
return bad;
}
//
// getzrange
//
void getzrange(const vec3_t *pos, int16_t sectnum,
int32_t *ceilz, int32_t *ceilhit, int32_t *florz, int32_t *florhit,
int32_t walldist, uint32_t cliptype)
{
if (sectnum < 0)
{
*ceilz = INT32_MIN; *ceilhit = -1;
*florz = INT32_MAX; *florhit = -1;
return;
}
int32_t clipsectcnt = 0;
#ifdef YAX_ENABLE
// YAX round, -1:center, 0:ceiling, 1:floor
int32_t mcf=-1;
#endif
uspritetype *curspr=NULL; // non-NULL when handling sprite with sector-like clipping
int32_t curidx=-1, clipspritecnt = 0;
//Extra walldist for sprites on sector lines
const int32_t extradist = walldist+MAXCLIPDIST+1;
const int32_t xmin = pos->x-extradist, ymin = pos->y-extradist;
const int32_t xmax = pos->x+extradist, ymax = pos->y+extradist;
const int32_t dawalclipmask = (cliptype&65535);
const int32_t dasprclipmask = (cliptype>>16);
getzsofslope(sectnum,pos->x,pos->y,ceilz,florz);
*ceilhit = sectnum+16384; *florhit = sectnum+16384;
#ifdef YAX_ENABLE
origclipsectorlist[0] = sectnum;
origclipsectnum = 1;
#endif
clipsectorlist[0] = sectnum;
clipsectnum = 1;
clipspritenum = 0;
#ifdef HAVE_CLIPSHAPE_FEATURE
if (0)
{
beginagain:
// replace sector and wall with clip map
engineSetClipMap(&origmapinfo, &clipmapinfo);
clipsectcnt = clipsectnum; // should be a nop, "safety"...
}
#endif
#ifdef YAX_ENABLE
restart_grand:
#endif
do //Collect sectors inside your square first
{
#ifdef HAVE_CLIPSHAPE_FEATURE
if (clipsectcnt>=clipsectnum)
{
// one set of clip-sprite sectors completed, prepare the next
curspr = (uspritetype *)&sprite[clipspritelist[clipspritecnt]];
curidx = clipshape_idx_for_sprite(curspr, curidx);
if (curidx < 0)
{
// didn't find matching clipping sectors for sprite
clipspritecnt++;
continue;
}
clipsprite_initindex(curidx, curspr, &clipsectcnt, pos);
for (bssize_t i=0; i<clipsectnum; i++)
{
int const k = clipsectorlist[i];
if (k==sectq[clipinfo[curidx].qend])
continue;
int32_t daz, daz2;
getzsofslope(k,pos->x,pos->y,&daz,&daz2);
int32_t fz, cz;
getzsofslope(sectq[clipinfo[curidx].qend],pos->x,pos->y,&cz,&fz);
const int hitwhat = (curspr-(uspritetype *)sprite)+49152;
if ((sector[k].ceilingstat&1)==0)
{
if (pos->z < cz && cz < *florz) { *florz = cz; *florhit = hitwhat; }
if (pos->z > daz && daz > *ceilz) { *ceilz = daz; *ceilhit = hitwhat; }
}
if ((sector[k].floorstat&1)==0)
{
if (pos->z < daz2 && daz2 < *florz) { *florz = daz2; *florhit = hitwhat; }
if (pos->z > fz && fz > *ceilz) { *ceilz = fz; *ceilhit = hitwhat; }
}
}
}
#endif
////////// Walls //////////
const sectortype *const startsec = &sector[clipsectorlist[clipsectcnt]];
const int startwall = startsec->wallptr;
const int endwall = startwall + startsec->wallnum;
for (bssize_t j=startwall; j<endwall; j++)
{
const int k = wall[j].nextsector;
if (k >= 0)
{
vec2_t const v1 = *(vec2_t *)&wall[j];
vec2_t const v2 = *(vec2_t *)&wall[wall[j].point2];
if ((v1.x < xmin && (v2.x < xmin)) || (v1.x > xmax && v2.x > xmax) ||
(v1.y < ymin && (v2.y < ymin)) || (v1.y > ymax && v2.y > ymax))
continue;
vec2_t const d = { v2.x-v1.x, v2.y-v1.y };
if (d.x*(pos->y-v1.y) < (pos->x-v1.x)*d.y) continue; //back
vec2_t da = { (d.x > 0) ? d.x*(ymin-v1.y) : d.x*(ymax-v1.y),
(d.y > 0) ? d.y*(xmax-v1.x) : d.y*(xmin-v1.x) };
if (da.x >= da.y)
continue;
if (wall[j].cstat&dawalclipmask) continue; // XXX?
const sectortype *const sec = &sector[k];
#ifdef HAVE_CLIPSHAPE_FEATURE
if (curspr)
{
if (k==sectq[clipinfo[curidx].qend])
continue;
if ((sec->ceilingstat&1) && (sec->floorstat&1))
continue;
}
else
#endif
if (editstatus == 0)
{
if (((sec->ceilingstat&1) == 0) && (pos->z <= sec->ceilingz+(3<<8))) continue;
if (((sec->floorstat&1) == 0) && (pos->z >= sec->floorz-(3<<8))) continue;
}
int i;
for (i=clipsectnum-1; i>=0; --i)
if (clipsectorlist[i] == k) break;
if (i < 0) addclipsect(k);
if (((v1.x < xmin + MAXCLIPDIST) && (v2.x < xmin + MAXCLIPDIST)) ||
((v1.x > xmax - MAXCLIPDIST) && (v2.x > xmax - MAXCLIPDIST)) ||
((v1.y < ymin + MAXCLIPDIST) && (v2.y < ymin + MAXCLIPDIST)) ||
((v1.y > ymax - MAXCLIPDIST) && (v2.y > ymax - MAXCLIPDIST)))
continue;
if (d.x > 0) da.x += d.x*MAXCLIPDIST; else da.x -= d.x*MAXCLIPDIST;
if (d.y > 0) da.y -= d.y*MAXCLIPDIST; else da.y += d.y*MAXCLIPDIST;
if (da.x >= da.y)
continue;
#ifdef YAX_ENABLE
if (mcf==-1 && curspr==NULL)
origclipsectorlist[origclipsectnum++] = k;
#endif
//It actually got here, through all the continue's!!!
int32_t daz, daz2;
getzsofslope(k, pos->x,pos->y, &daz,&daz2);
#ifdef HAVE_CLIPSHAPE_FEATURE
if (curspr)
{
int32_t fz,cz, hitwhat=(curspr-(uspritetype *)sprite)+49152;
getzsofslope(sectq[clipinfo[curidx].qend],pos->x,pos->y,&cz,&fz);
if ((sec->ceilingstat&1)==0)
{
if (pos->z < cz && cz < *florz) { *florz = cz; *florhit = hitwhat; }
if (pos->z > daz && daz > *ceilz) { *ceilz = daz; *ceilhit = hitwhat; }
}
if ((sec->floorstat&1)==0)
{
if (pos->z < daz2 && daz2 < *florz) { *florz = daz2; *florhit = hitwhat; }
if (pos->z > fz && fz > *ceilz) { *ceilz = fz; *ceilhit = hitwhat; }
}
}
else
#endif
{
#ifdef YAX_ENABLE
int16_t cb, fb;
yax_getbunches(k, &cb, &fb);
#endif
if (daz > *ceilz)
#ifdef YAX_ENABLE
if (mcf!=YAX_FLOOR && cb < 0)
#endif
*ceilz = daz, *ceilhit = k+16384;
if (daz2 < *florz)
#ifdef YAX_ENABLE
if (mcf!=YAX_CEILING && fb < 0)
#endif
*florz = daz2, *florhit = k+16384;
}
}
}
clipsectcnt++;
}
while (clipsectcnt < clipsectnum || clipspritecnt < clipspritenum);
#ifdef HAVE_CLIPSHAPE_FEATURE
if (curspr)
{
engineSetClipMap(NULL, &origmapinfo); // restore original map
clipsectnum = clipspritenum = 0; // skip the next for loop and check afterwards
}
#endif
////////// Sprites //////////
if (dasprclipmask)
for (bssize_t i=0; i<clipsectnum; i++)
{
for (bssize_t j=headspritesect[clipsectorlist[i]]; j>=0; j=nextspritesect[j])
{
const int32_t cstat = sprite[j].cstat;
int32_t daz, daz2;
if (cstat&dasprclipmask)
{
int32_t clipyou = 0;
#ifdef HAVE_CLIPSHAPE_FEATURE
if (clipsprite_try((uspritetype *)&sprite[j], xmin,ymin, xmax,ymax))
continue;
#endif
vec2_t v1 = *(vec2_t *)&sprite[j];
switch (cstat & CSTAT_SPRITE_ALIGNMENT_MASK)
{
case CSTAT_SPRITE_ALIGNMENT_FACING:
{
int32_t k = walldist+(sprite[j].clipdist<<2)+1;
if ((klabs(v1.x-pos->x) <= k) && (klabs(v1.y-pos->y) <= k))
{
daz = sprite[j].z + spriteheightofs(j, &k, 1);
daz2 = daz - k;
clipyou = 1;
}
break;
}
case CSTAT_SPRITE_ALIGNMENT_WALL:
{
vec2_t v2;
get_wallspr_points((uspritetype *)&sprite[j], &v1.x, &v2.x, &v1.y, &v2.y);
if (clipinsideboxline(pos->x,pos->y,v1.x,v1.y,v2.x,v2.y,walldist+1) != 0)
{
int32_t k;
daz = sprite[j].z + spriteheightofs(j, &k, 1);
daz2 = daz-k;
clipyou = 1;
}
break;
}
case CSTAT_SPRITE_ALIGNMENT_FLOOR:
{
daz = sprite[j].z; daz2 = daz;
if ((cstat&64) != 0 && (pos->z > daz) == ((cstat&8)==0))
continue;
vec2_t v2, v3, v4;
get_floorspr_points((uspritetype const *) &sprite[j], pos->x, pos->y, &v1.x, &v2.x, &v3.x, &v4.x,
&v1.y, &v2.y, &v3.y, &v4.y);
vec2_t const da = { mulscale14(sintable[(sprite[j].ang - 256 + 512) & 2047], walldist + 4),
mulscale14(sintable[(sprite[j].ang - 256) & 2047], walldist + 4) };
v1.x += da.x; v2.x -= da.y; v3.x -= da.x; v4.x += da.y;
v1.y += da.y; v2.y += da.x; v3.y -= da.y; v4.y -= da.x;
clipyou = get_floorspr_clipyou(v1.x, v2.x, v3.x, v4.x, v1.y, v2.y, v3.y, v4.y);
break;
}
}
if (clipyou != 0)
{
if ((pos->z > daz) && (daz > *ceilz
#ifdef YAX_ENABLE
|| (daz == *ceilz && yax_getbunch(clipsectorlist[i], YAX_CEILING)>=0)
#endif
))
{
*ceilz = daz;
*ceilhit = j+49152;
}
if ((pos->z < daz2) && (daz2 < *florz
#ifdef YAX_ENABLE
// can have a floor-sprite lying directly on the floor!
|| (daz2 == *florz && yax_getbunch(clipsectorlist[i], YAX_FLOOR)>=0)
#endif
))
{
*florz = daz2;
*florhit = j+49152;
}
}
}
}
}
#ifdef HAVE_CLIPSHAPE_FEATURE
if (clipspritenum>0)
goto beginagain;
#endif
#ifdef YAX_ENABLE
if (numyaxbunches > 0)
{
int const dasecclipmask = yax_waltosecmask(dawalclipmask);
int16_t cb, fb;
yax_getbunches(sectnum, &cb, &fb);
mcf++;
clipsectcnt = 0; clipsectnum = 0;
int didchange = 0;
if (cb>=0 && mcf==0 && *ceilhit==sectnum+16384)
{
int i;
for (i=0; i<origclipsectnum; i++)
{
int const j = origclipsectorlist[i];
if (yax_getbunch(j, YAX_CEILING) >= 0)
if (sector[j].ceilingstat&dasecclipmask)
break;
}
if (i==origclipsectnum)
for (i=0; i<origclipsectnum; i++)
{
cb = yax_getbunch(origclipsectorlist[i], YAX_CEILING);
if (cb < 0)
continue;
for (bssize_t SECTORS_OF_BUNCH(cb,YAX_FLOOR, j))
if (inside(pos->x,pos->y, j)==1)
{
addclipsect(j);
int const daz = getceilzofslope(j, pos->x,pos->y);
if (!didchange || daz > *ceilz)
didchange=1, *ceilhit = j+16384, *ceilz = daz;
}
}
if (clipsectnum==0)
mcf++;
}
else if (mcf==0)
mcf++;
didchange = 0;
if (fb>=0 && mcf==1 && *florhit==sectnum+16384)
{
int i=0;
for (; i<origclipsectnum; i++)
{
int const j = origclipsectorlist[i];
if (yax_getbunch(j, YAX_FLOOR) >= 0)
if (sector[j].floorstat&dasecclipmask)
break;
}
// (almost) same as above, but with floors...
if (i==origclipsectnum)
for (i=0; i<origclipsectnum; i++)
{
fb = yax_getbunch(origclipsectorlist[i], YAX_FLOOR);
if (fb < 0)
continue;
for (bssize_t SECTORS_OF_BUNCH(fb, YAX_CEILING, j))
if (inside(pos->x,pos->y, j)==1)
{
addclipsect(j);
int const daz = getflorzofslope(j, pos->x,pos->y);
if (!didchange || daz < *florz)
didchange=1, *florhit = j+16384, *florz = daz;
}
}
}
if (clipsectnum > 0)
{
// sector-like sprite re-init:
curidx = -1;
curspr = NULL;
clipspritecnt = 0; clipspritenum = 0;
goto restart_grand;
}
}
#endif
}
// intp: point of currently best (closest) intersection
int32_t try_facespr_intersect(uspritetype const * const spr, const vec3_t *refpos,
int32_t vx, int32_t vy, int32_t vz,
vec3_t *intp, int32_t strictly_smaller_than_p)
{
const int32_t x1=spr->x, y1=spr->y;
const int32_t xs=refpos->x, ys=refpos->y;
const int32_t topt = vx*(x1-xs) + vy*(y1-ys);
if (topt > 0)
{
const int32_t bot = vx*vx + vy*vy;
if (bot != 0)
{
int32_t i;
const int32_t intz = refpos->z + scale(vz,topt,bot);
const int32_t z1 = spr->z + spriteheightofsptr(spr, &i, 1);
if (intz >= z1-i && intz <= z1)
{
const int32_t topu = vx*(y1-ys) - vy*(x1-xs);
const int32_t offx = scale(vx,topu,bot);
const int32_t offy = scale(vy,topu,bot);
const int32_t dist = offx*offx + offy*offy;
i = tilesiz[spr->picnum].x*spr->xrepeat;
if (dist <= mulscale7(i,i))
{
const int32_t intx = xs + scale(vx,topt,bot);
const int32_t inty = ys + scale(vy,topt,bot);
if (klabs(intx-xs)+klabs(inty-ys) + strictly_smaller_than_p
<= klabs(intp->x-xs)+klabs(intp->y-ys))
{
intp->x = intx;
intp->y = inty;
intp->z = intz;
return 1;
}
}
}
}
}
return 0;
}
static inline void hit_set(hitdata_t *hit, int32_t sectnum, int32_t wallnum, int32_t spritenum,
int32_t x, int32_t y, int32_t z)
{
hit->sect = sectnum;
hit->wall = wallnum;
hit->sprite = spritenum;
hit->pos.x = x;
hit->pos.y = y;
hit->pos.z = z;
}
static int32_t hitscan_hitsectcf=-1;
// stat, heinum, z: either ceiling- or floor-
// how: -1: behave like ceiling, 1: behave like floor
static int32_t hitscan_trysector(const vec3_t *sv, const usectortype *sec, hitdata_t *hit,
int32_t vx, int32_t vy, int32_t vz,
uint16_t stat, int16_t heinum, int32_t z, int32_t how, const intptr_t *tmp)
{
int32_t x1 = INT32_MAX, y1, z1;
int32_t i;
if (stat&2)
{
auto const wal = (uwalltype *)&wall[sec->wallptr];
auto const wal2 = (uwalltype *)&wall[wal->point2];
int32_t j, dax=wal2->x-wal->x, day=wal2->y-wal->y;
i = nsqrtasm(uhypsq(dax,day)); if (i == 0) return 1; //continue;
i = divscale15(heinum,i);
dax *= i; day *= i;
j = (vz<<8)-dmulscale15(dax,vy,-day,vx);
if (j != 0)
{
i = ((z - sv->z)<<8)+dmulscale15(dax,sv->y-wal->y,-day,sv->x-wal->x);
if (((i^j) >= 0) && ((klabs(i)>>1) < klabs(j)))
{
i = divscale30(i,j);
x1 = sv->x + mulscale30(vx,i);
y1 = sv->y + mulscale30(vy,i);
z1 = sv->z + mulscale30(vz,i);
}
}
}
else if ((how*vz > 0) && (how*sv->z <= how*z))
{
z1 = z; i = z1-sv->z;
if ((klabs(i)>>1) < vz*how)
{
i = divscale30(i,vz);
x1 = sv->x + mulscale30(vx,i);
y1 = sv->y + mulscale30(vy,i);
}
}
if ((x1 != INT32_MAX) && (klabs(x1-sv->x)+klabs(y1-sv->y) < klabs((hit->pos.x)-sv->x)+klabs((hit->pos.y)-sv->y)))
{
if (tmp==NULL)
{
if (inside(x1,y1,sec-(usectortype *)sector) == 1)
{
hit_set(hit, sec-(usectortype *)sector, -1, -1, x1, y1, z1);
hitscan_hitsectcf = (how+1)>>1;
}
}
else
{
const int32_t curidx=(int32_t)tmp[0];
const uspritetype *const curspr=(uspritetype *)tmp[1];
const int32_t thislastsec = tmp[2];
if (!thislastsec)
{
if (inside(x1,y1,sec-(usectortype *)sector) == 1)
hit_set(hit, curspr->sectnum, -1, curspr-(uspritetype *)sprite, x1, y1, z1);
}
#ifdef HAVE_CLIPSHAPE_FEATURE
else
{
for (i=clipinfo[curidx].qbeg; i<clipinfo[curidx].qend; i++)
{
if (inside(x1,y1,sectq[i]) == 1)
{
hit_set(hit, curspr->sectnum, -1, curspr-(uspritetype *)sprite, x1, y1, z1);
break;
}
}
}
#endif
}
}
return 0;
}
//
// hitscan
//
int32_t hitscan(const vec3_t *sv, int16_t sectnum, int32_t vx, int32_t vy, int32_t vz,
hitdata_t *hit, uint32_t cliptype)
{
int32_t x1, y1=0, z1=0, x2, y2, intx, inty, intz;
int32_t i, k, daz;
int16_t tempshortcnt, tempshortnum;
uspritetype *curspr = NULL;
int32_t clipspritecnt, curidx=-1;
// tmp: { (int32_t)curidx, (spritetype *)curspr, (!=0 if outer sector) }
intptr_t tmp[3], *tmpptr=NULL;
#ifdef YAX_ENABLE
vec3_t newsv;
int32_t oldhitsect = -1, oldhitsect2 = -2;
#endif
const int32_t dawalclipmask = (cliptype&65535);
const int32_t dasprclipmask = (cliptype>>16);
hit->sect = -1; hit->wall = -1; hit->sprite = -1;
if (sectnum < 0)
return -1;
#ifdef YAX_ENABLE
restart_grand:
#endif
*(vec2_t *)&hit->pos = hitscangoal;
clipsectorlist[0] = sectnum;
tempshortcnt = 0; tempshortnum = 1;
clipspritecnt = clipspritenum = 0;
do
{
int32_t dasector, z, startwall, endwall;
#ifdef HAVE_CLIPSHAPE_FEATURE
if (tempshortcnt >= tempshortnum)
{
// one bunch of sectors completed, prepare the next
if (!curspr)
engineSetClipMap(&origmapinfo, &clipmapinfo); // replace sector and wall with clip map
curspr = (uspritetype *)&sprite[clipspritelist[clipspritecnt]];
curidx = clipshape_idx_for_sprite(curspr, curidx);
if (curidx < 0)
{
clipspritecnt++;
continue;
}
tmp[0] = (intptr_t)curidx;
tmp[1] = (intptr_t)curspr;
tmpptr = tmp;
clipsprite_initindex(curidx, curspr, &i, sv); // &i is dummy
tempshortnum = (int16_t)clipsectnum;
tempshortcnt = 0;
}
#endif
dasector = clipsectorlist[tempshortcnt];
auto const * sec = (usectortype *)&sector[dasector];
i = 1;
#ifdef HAVE_CLIPSHAPE_FEATURE
if (curspr)
{
if (dasector == sectq[clipinfo[curidx].qend])
{
i = -1;
tmp[2] = 1;
}
else tmp[2] = 0;
}
#endif
if (hitscan_trysector(sv, sec, hit, vx,vy,vz, sec->ceilingstat, sec->ceilingheinum, sec->ceilingz, -i, tmpptr))
continue;
if (hitscan_trysector(sv, sec, hit, vx,vy,vz, sec->floorstat, sec->floorheinum, sec->floorz, i, tmpptr))
continue;
////////// Walls //////////
startwall = sec->wallptr; endwall = startwall + sec->wallnum;
for (z=startwall; z<endwall; z++)
{
auto const wal = (uwalltype *)&wall[z];
auto const wal2 = (uwalltype *)&wall[wal->point2];
int const nextsector = wal->nextsector;
if (curspr && nextsector<0) continue;
int32_t daz2, zz;
x1 = wal->x; y1 = wal->y; x2 = wal2->x; y2 = wal2->y;
if ((coord_t)(x1-sv->x)*(y2-sv->y) < (coord_t)(x2-sv->x)*(y1-sv->y)) continue;
if (rintersect(sv->x,sv->y,sv->z, vx,vy,vz, x1,y1, x2,y2, &intx,&inty,&intz) == -1) continue;
if (klabs(intx-sv->x)+klabs(inty-sv->y) >= klabs((hit->pos.x)-sv->x)+klabs((hit->pos.y)-sv->y))
continue;
if (!curspr)
{
if ((nextsector < 0) || (wal->cstat&dawalclipmask))
{
hit_set(hit, dasector, z, -1, intx, inty, intz);
continue;
}
getzsofslope(nextsector,intx,inty,&daz,&daz2);
if (intz <= daz || intz >= daz2)
{
hit_set(hit, dasector, z, -1, intx, inty, intz);
continue;
}
}
#ifdef HAVE_CLIPSHAPE_FEATURE
else
{
int32_t cz,fz;
if (wal->cstat&dawalclipmask)
{
hit_set(hit, curspr->sectnum, -1, curspr-(uspritetype *)sprite, intx, inty, intz);
continue;
}
getzsofslope(nextsector,intx,inty,&daz,&daz2);
getzsofslope(sectq[clipinfo[curidx].qend],intx,inty,&cz,&fz);
// ceil cz daz daz2 fz floor
if ((cz <= intz && intz <= daz) || (daz2 <= intz && intz <= fz))
{
hit_set(hit, curspr->sectnum, -1, curspr-(uspritetype *)sprite, intx, inty, intz);
continue;
}
}
#endif
for (zz=tempshortnum-1; zz>=0; zz--)
if (clipsectorlist[zz] == nextsector) break;
if (zz < 0) clipsectorlist[tempshortnum++] = nextsector;
}
////////// Sprites //////////
if (dasprclipmask==0)
continue;
#ifdef HAVE_CLIPSHAPE_FEATURE
if (curspr)
continue;
#endif
for (z=headspritesect[dasector]; z>=0; z=nextspritesect[z])
{
const uspritetype *const spr = (uspritetype *)&sprite[z];
const int32_t cstat = spr->cstat;
#ifdef USE_OPENGL
if (!hitallsprites)
#endif
if ((cstat&dasprclipmask) == 0)
continue;
#ifdef HAVE_CLIPSHAPE_FEATURE
// try and see whether this sprite's picnum has sector-like clipping data
i = pictoidx[spr->picnum];
// handle sector-like floor sprites separately
while (i>=0 && (spr->cstat&32) != (clipmapinfo.sector[sectq[clipinfo[i].qbeg]].CM_CSTAT&32))
i = clipinfo[i].next;
if (i>=0 && clipspritenum<MAXCLIPNUM)
{
clipspritelist[clipspritenum++] = z;
continue;
}
#endif
x1 = spr->x; y1 = spr->y; z1 = spr->z;
switch (cstat&CSTAT_SPRITE_ALIGNMENT)
{
case 0:
{
if (try_facespr_intersect(spr, sv, vx, vy, vz, &hit->pos, 0))
{
hit->sect = dasector;
hit->wall = -1;
hit->sprite = z;
}
break;
}
case CSTAT_SPRITE_ALIGNMENT_WALL:
{
int32_t ucoefup16;
int32_t tilenum = spr->picnum;
get_wallspr_points(spr, &x1, &x2, &y1, &y2);
if ((cstat&64) != 0) //back side of 1-way sprite
if ((coord_t)(x1-sv->x)*(y2-sv->y) < (coord_t)(x2-sv->x)*(y1-sv->y)) continue;
ucoefup16 = rintersect(sv->x,sv->y,sv->z,vx,vy,vz,x1,y1,x2,y2,&intx,&inty,&intz);
if (ucoefup16 == -1) continue;
if (klabs(intx-sv->x)+klabs(inty-sv->y) > klabs((hit->pos.x)-sv->x)+klabs((hit->pos.y)-sv->y))
continue;
daz = spr->z + spriteheightofs(z, &k, 1);
if (intz > daz-k && intz < daz)
{
if (picanm[tilenum].sf&PICANM_TEXHITSCAN_BIT)
{
DO_TILE_ANIM(tilenum, 0);
if (!waloff[tilenum])
tileLoad(tilenum);
if (waloff[tilenum])
{
// daz-intz > 0 && daz-intz < k
int32_t xtex = mulscale16(ucoefup16, tilesiz[tilenum].x);
int32_t vcoefup16 = 65536-divscale16(daz-intz, k);
int32_t ytex = mulscale16(vcoefup16, tilesiz[tilenum].y);
const char *texel = (char *)(waloff[tilenum] + tilesiz[tilenum].y*xtex + ytex);
if (*texel == 255)
continue;
}
}
hit_set(hit, dasector, -1, z, intx, inty, intz);
}
break;
}
case CSTAT_SPRITE_ALIGNMENT_FLOOR:
{
int32_t x3, y3, x4, y4, zz;
if (vz == 0) continue;
intz = z1;
if (((intz-sv->z)^vz) < 0) continue;
if ((cstat&64) != 0)
if ((sv->z > intz) == ((cstat&8)==0)) continue;
#if 1
// Abyss crash prevention code ((intz-sv->z)*zx overflowing a 8-bit word)
// PK: the reason for the crash is not the overflowing (even if it IS a problem;
// signed overflow is undefined behavior in C), but rather the idiv trap when
// the resulting quotient doesn't fit into a *signed* 32-bit integer.
zz = (uint32_t)(intz-sv->z) * vx;
intx = sv->x+scale(zz,1,vz);
zz = (uint32_t)(intz-sv->z) * vy;
inty = sv->y+scale(zz,1,vz);
#else
intx = sv->x+scale(intz-sv->z,vx,vz);
inty = sv->y+scale(intz-sv->z,vy,vz);
#endif
if (klabs(intx-sv->x)+klabs(inty-sv->y) > klabs((hit->pos.x)-sv->x)+klabs((hit->pos.y)-sv->y))
continue;
get_floorspr_points((uspritetype const *)spr, intx, inty, &x1, &x2, &x3, &x4,
&y1, &y2, &y3, &y4);
if (get_floorspr_clipyou(x1, x2, x3, x4, y1, y2, y3, y4))
{
hit_set(hit, dasector, -1, z, intx, inty, intz);
}
break;
}
}
}
}
while (++tempshortcnt < tempshortnum || clipspritecnt < clipspritenum);
#ifdef HAVE_CLIPSHAPE_FEATURE
if (curspr)
engineSetClipMap(NULL, &origmapinfo);
#endif
#ifdef YAX_ENABLE
if (numyaxbunches == 0 || editstatus)
return 0;
if (hit->sprite==-1 && hit->wall==-1 && hit->sect!=oldhitsect
&& hit->sect != oldhitsect2) // 'ping-pong' infloop protection
{
if (hit->sect == -1 && oldhitsect >= 0)
{
// this is bad: we didn't hit anything after going through a ceiling/floor
Bmemcpy(&hit->pos, &newsv, sizeof(vec3_t));
hit->sect = oldhitsect;
return 0;
}
// 1st, 2nd, ... ceil/floor hit
// hit->sect is >=0 because if oldhitsect's init and check above
if (SECTORFLD(hit->sect,stat, hitscan_hitsectcf)&yax_waltosecmask(dawalclipmask))
return 0;
i = yax_getneighborsect(hit->pos.x, hit->pos.y, hit->sect, hitscan_hitsectcf);
if (i >= 0)
{
Bmemcpy(&newsv, &hit->pos, sizeof(vec3_t));
sectnum = i;
sv = &newsv;
oldhitsect2 = oldhitsect;
oldhitsect = hit->sect;
hit->sect = -1;
// sector-like sprite re-init:
curspr = 0;
curidx = -1;
tmpptr = NULL;
goto restart_grand;
}
}
#endif
return 0;
}
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