mirror of
https://github.com/ZDoom/raze-gles.git
synced 2024-12-29 04:50:42 +00:00
e7d73fd8e7
This seems to require the old code as-is - the latest refactoring broke some stuff again and had to be reverted.
1522 lines
52 KiB
C++
1522 lines
52 KiB
C++
// "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman
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// Ken Silverman's official web site: "http://www.advsys.net/ken"
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// See the included license file "BUILDLIC.TXT" for license info.
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//
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// This file has been modified from Ken Silverman's original release
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// by Jonathon Fowler (jf@jonof.id.au)
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// by the EDuke32 team (development@voidpoint.com)
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#include "build.h"
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#include "clip.h"
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#include "engine_priv.h"
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#include "printf.h"
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#include "gamefuncs.h"
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enum { MAXCLIPDIST = 1024 };
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static int16_t clipnum;
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static linetype clipit[MAXCLIPNUM];
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static int32_t clipsectnum, origclipsectnum, clipspritenum;
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int16_t clipsectorlist[MAXCLIPSECTORS];
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static int16_t origclipsectorlist[MAXCLIPSECTORS];
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static uint8_t clipsectormap[(MAXSECTORS+7)>>3];
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static uint8_t origclipsectormap[(MAXSECTORS+7)>>3];
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static int16_t clipobjectval[MAXCLIPNUM];
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static uint8_t clipignore[(MAXCLIPNUM+7)>>3];
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static int32_t rxi[8], ryi[8];
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int32_t quickloadboard=0;
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vec2_t hitscangoal = { (1<<29)-1, (1<<29)-1 };
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int32_t hitallsprites = 0;
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////////// CLIPMOVE //////////
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// x1, y1: in/out
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// rest x/y: out
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template <typename T>
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static inline void get_wallspr_points(T const * const spr, int32_t *x1, int32_t *x2,
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int32_t *y1, int32_t *y2)
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{
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//These lines get the 2 points of the rotated sprite
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//Given: (x1, y1) starts out as the center point
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const int32_t tilenum=spr->picnum, ang=spr->ang;
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const int32_t xrepeat = spr->xrepeat;
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int32_t xoff = tileLeftOffset(tilenum) + spr->xoffset;
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int32_t k, l, dax, day;
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if (spr->cstat&4)
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xoff = -xoff;
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dax = bsin(ang) * xrepeat;
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day = -bcos(ang) * xrepeat;
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l = tileWidth(tilenum);
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k = (l>>1)+xoff;
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*x1 -= MulScale(dax,k, 16);
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*x2 = *x1 + MulScale(dax,l, 16);
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*y1 -= MulScale(day,k, 16);
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*y2 = *y1 + MulScale(day,l, 16);
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}
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// x1, y1: in/out
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// rest x/y: out
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template <typename T>
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static inline void get_floorspr_points(T const * const spr, int32_t px, int32_t py,
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int32_t *x1, int32_t *x2, int32_t *x3, int32_t *x4,
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int32_t *y1, int32_t *y2, int32_t *y3, int32_t *y4)
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{
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const int32_t tilenum = spr->picnum;
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const int32_t cosang = bcos(spr->ang);
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const int32_t sinang = bsin(spr->ang);
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vec2_t const span = { tileWidth(tilenum), tileHeight(tilenum)};
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vec2_t const repeat = { spr->xrepeat, spr->yrepeat };
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vec2_t adjofs = { tileLeftOffset(tilenum) + spr->xoffset, tileTopOffset(tilenum) + spr->yoffset };
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if (spr->cstat & 4)
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adjofs.x = -adjofs.x;
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if (spr->cstat & 8)
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adjofs.y = -adjofs.y;
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vec2_t const center = { ((span.x >> 1) + adjofs.x) * repeat.x, ((span.y >> 1) + adjofs.y) * repeat.y };
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vec2_t const rspan = { span.x * repeat.x, span.y * repeat.y };
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vec2_t const ofs = { -MulScale(cosang, rspan.y, 16), -MulScale(sinang, rspan.y, 16) };
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*x1 += DMulScale(sinang, center.x, cosang, center.y, 16) - px;
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*y1 += DMulScale(sinang, center.y, -cosang, center.x, 16) - py;
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*x2 = *x1 - MulScale(sinang, rspan.x, 16);
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*y2 = *y1 + MulScale(cosang, rspan.x, 16);
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*x3 = *x2 + ofs.x, *x4 = *x1 + ofs.x;
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*y3 = *y2 + ofs.y, *y4 = *y1 + ofs.y;
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}
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int32_t clipmoveboxtracenum = 3;
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//
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// clipinsidebox
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//
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int clipinsidebox(vec2_t *vect, int wallnum, int walldist)
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{
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int const r = walldist << 1;
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auto const wal1 = (uwallptr_t)&wall[wallnum];
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auto const wal2 = (uwallptr_t)&wall[wal1->point2];
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vec2_t const v1 = { wal1->x + walldist - vect->x, wal1->y + walldist - vect->y };
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vec2_t v2 = { wal2->x + walldist - vect->x, wal2->y + walldist - vect->y };
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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)))
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return 0;
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v2.x -= v1.x; v2.y -= v1.y;
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if (v2.x * (walldist - v1.y) >= v2.y * (walldist - v1.x)) // Front
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{
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v2.x *= ((v2.x > 0) ? (0 - v1.y) : (r - v1.y));
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v2.y *= ((v2.y > 0) ? (r - v1.x) : (0 - v1.x));
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return v2.x < v2.y;
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}
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v2.x *= ((v2.x > 0) ? (r - v1.y) : (0 - v1.y));
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v2.y *= ((v2.y > 0) ? (0 - v1.x) : (r - v1.x));
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return (v2.x >= v2.y) << 1;
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}
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//
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// clipinsideboxline
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//
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int clipinsideboxline(int x, int y, int x1, int y1, int x2, int y2, int walldist)
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{
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int const r = walldist << 1;
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x1 += walldist - x;
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x2 += walldist - x;
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if (((x1 < 0) && (x2 < 0)) || ((x1 >= r) && (x2 >= r)))
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return 0;
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y1 += walldist - y;
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y2 += walldist - y;
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if (((y1 < 0) && (y2 < 0)) || ((y1 >= r) && (y2 >= r)))
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return 0;
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x2 -= x1;
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y2 -= y1;
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if (x2 * (walldist - y1) >= y2 * (walldist - x1)) // Front
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{
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x2 *= ((x2 > 0) ? (0 - y1) : (r - y1));
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y2 *= ((y2 > 0) ? (r - x1) : (0 - x1));
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return x2 < y2;
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}
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x2 *= ((x2 > 0) ? (r - y1) : (0 - y1));
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y2 *= ((y2 > 0) ? (0 - x1) : (r - x1));
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return (x2 >= y2) << 1;
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}
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static int32_t clipmove_warned;
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static inline void addclipsect(int const sectnum)
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{
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if (clipsectnum < MAXCLIPSECTORS)
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{
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bitmap_set(clipsectormap, sectnum);
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clipsectorlist[clipsectnum++] = sectnum;
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}
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else
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clipmove_warned |= 1;
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}
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static void addclipline(int32_t dax1, int32_t day1, int32_t dax2, int32_t day2, int16_t daoval, int nofix)
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{
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if (clipnum >= MAXCLIPNUM)
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{
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clipmove_warned |= 2;
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return;
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}
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clipit[clipnum].x1 = dax1; clipit[clipnum].y1 = day1;
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clipit[clipnum].x2 = dax2; clipit[clipnum].y2 = day2;
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clipobjectval[clipnum] = daoval;
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uint32_t const mask = (1 << (clipnum&7));
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uint8_t &value = clipignore[clipnum>>3];
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value = (value & ~mask) | (-nofix & mask);
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clipnum++;
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}
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inline void clipmove_tweak_pos(const vec3_t *pos, int32_t gx, int32_t gy, int32_t x1, int32_t y1, int32_t x2,
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int32_t y2, int32_t *daxptr, int32_t *dayptr)
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{
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int32_t daz;
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if (enginecompatibility_mode == ENGINECOMPATIBILITY_19950829 ||
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rintersect(pos->x, pos->y, 0, gx, gy, 0, x1, y1, x2, y2, daxptr, dayptr, &daz) == -1)
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{
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*daxptr = pos->x;
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*dayptr = pos->y;
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}
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}
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// Returns: should clip?
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static int cliptestsector(int const dasect, int const nextsect, int32_t const flordist, int32_t const ceildist, vec2_t const pos, int32_t const posz)
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{
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assert((unsigned)dasect < (unsigned)numsectors && (unsigned)nextsect < (unsigned)numsectors);
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auto const sec2 = (usectorptr_t)§or[nextsect];
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switch (enginecompatibility_mode)
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{
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case ENGINECOMPATIBILITY_NONE:
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break;
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default:
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{
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int32_t daz = getflorzofslope(dasect, pos.x, pos.y);
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int32_t daz2 = getflorzofslope(nextsect, pos.x, pos.y);
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if (daz2 < daz-(1<<8) && (sec2->floorstat&1) == 0)
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if (posz >= daz2-(flordist-1)) return 1;
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daz = getceilzofslope(dasect, pos.x, pos.y);
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daz2 = getceilzofslope(nextsect, pos.x, pos.y);
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if (daz2 > daz+(1<<8) && (sec2->ceilingstat&1) == 0)
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if (posz <= daz2+(ceildist-1)) return 1;
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return 0;
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}
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}
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int32_t daz2 = sec2->floorz;
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int32_t dacz2 = sec2->ceilingz;
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if ((sec2->floorstat|sec2->ceilingstat) & 2)
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getcorrectzsofslope(nextsect, pos.x, pos.y, &dacz2, &daz2);
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if (daz2 <= dacz2)
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return 1;
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auto const sec = (usectorptr_t)§or[dasect];
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int32_t daz = sec->floorz;
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int32_t dacz = sec->ceilingz;
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if ((sec->floorstat|sec->ceilingstat) & 2)
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getcorrectzsofslope(dasect, pos.x, pos.y, &dacz, &daz);
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int32_t const sec2height = abs(daz2-dacz2);
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return ((abs(daz-dacz) > sec2height && // clip if the current sector is taller and the next is too small
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sec2height < (ceildist+(CLIPCURBHEIGHT<<1))) ||
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((sec2->floorstat&1) == 0 && // parallaxed floor curbs don't clip
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posz >= daz2-(flordist-1) && // also account for desired z distance tolerance
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daz2 < daz-CLIPCURBHEIGHT) || // curbs less tall than 256 z units don't clip
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((sec2->ceilingstat&1) == 0 &&
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posz <= dacz2+(ceildist-1) &&
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dacz2 > dacz+CLIPCURBHEIGHT)); // ceilings check the same conditions ^^^^^
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}
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int32_t clipmovex(vec3_t *pos, int16_t *sectnum,
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int32_t xvect, int32_t yvect,
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int32_t const walldist, int32_t const ceildist, int32_t const flordist, uint32_t const cliptype,
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uint8_t const noslidep)
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{
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const int32_t oboxtracenum = clipmoveboxtracenum;
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if (noslidep)
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clipmoveboxtracenum = 1;
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int32_t ret = clipmove(pos, sectnum, xvect, yvect,
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walldist, ceildist, flordist, cliptype);
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clipmoveboxtracenum = oboxtracenum;
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return ret;
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}
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//
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// raytrace (internal)
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//
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static inline int32_t cliptrace(vec2_t const pos, vec2_t * const goal)
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{
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int32_t hitwall = -1;
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for (native_t z=clipnum-1; z>=0; z--)
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{
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vec2_t const p1 = { clipit[z].x1, clipit[z].y1 };
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vec2_t const p2 = { clipit[z].x2, clipit[z].y2 };
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vec2_t const area = { p2.x-p1.x, p2.y-p1.y };
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int32_t topu = area.x*(pos.y-p1.y) - (pos.x-p1.x)*area.y;
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if (topu <= 0 || area.x*(goal->y-p1.y) > (goal->x-p1.x)*area.y)
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continue;
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vec2_t const diff = { goal->x-pos.x, goal->y-pos.y };
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if (diff.x*(p1.y-pos.y) > (p1.x-pos.x)*diff.y || diff.x*(p2.y-pos.y) <= (p2.x-pos.x)*diff.y)
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continue;
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int32_t const bot = diff.x*area.y - area.x*diff.y;
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native_t cnt = 256;
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if (!bot)
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continue;
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vec2_t n;
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do
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{
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if (--cnt < 0)
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{
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*goal = pos;
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return z;
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}
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n = { pos.x+Scale(diff.x, topu, bot), pos.y+Scale(diff.y, topu, bot) };
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topu--;
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} while (area.x*(n.y-p1.y) <= (n.x-p1.x)*area.y);
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if (abs(pos.x-n.x)+abs(pos.y-n.y) < abs(pos.x-goal->x)+abs(pos.y-goal->y))
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{
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*goal = n;
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hitwall = z;
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}
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}
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return hitwall;
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}
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//
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// keepaway (internal)
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//
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static inline void keepaway(int32_t *x, int32_t *y, int32_t w)
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{
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const int32_t x1 = clipit[w].x1, dx = clipit[w].x2-x1;
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const int32_t y1 = clipit[w].y1, dy = clipit[w].y2-y1;
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const int32_t ox = Sgn(-dy), oy = Sgn(dx);
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char first = (abs(dx) <= abs(dy));
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do
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{
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if (dx*(*y-y1) > (*x-x1)*dy)
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return;
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if (first == 0)
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*x += ox;
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else
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*y += oy;
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first ^= 1;
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}
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while (1);
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}
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static int get_floorspr_clipyou(vec2_t const v1, vec2_t const v2, vec2_t const v3, vec2_t const v4)
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{
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int clipyou = 0;
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if ((v1.y^v2.y) < 0)
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{
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if ((v1.x^v2.x) < 0) clipyou ^= (v1.x*v2.y < v2.x*v1.y)^(v1.y<v2.y);
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else if (v1.x >= 0) clipyou ^= 1;
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}
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if ((v2.y^v3.y) < 0)
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{
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if ((v2.x^v3.x) < 0) clipyou ^= (v2.x*v3.y < v3.x*v2.y)^(v2.y<v3.y);
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else if (v2.x >= 0) clipyou ^= 1;
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}
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if ((v3.y^v4.y) < 0)
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{
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if ((v3.x^v4.x) < 0) clipyou ^= (v3.x*v4.y < v4.x*v3.y)^(v3.y<v4.y);
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else if (v3.x >= 0) clipyou ^= 1;
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}
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if ((v4.y^v1.y) < 0)
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{
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if ((v4.x^v1.x) < 0) clipyou ^= (v4.x*v1.y < v1.x*v4.y)^(v4.y<v1.y);
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else if (v4.x >= 0) clipyou ^= 1;
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}
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return clipyou;
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}
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static void clipupdatesector(vec2_t const pos, int16_t * const sectnum, int walldist)
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{
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#if 0
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if (enginecompatibility_mode != ENGINECOMPATIBILITY_NONE)
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{
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updatesector(pos.x, pos.y, sectnum);
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return;
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}
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#endif
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if (inside_p(pos.x, pos.y, *sectnum))
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return;
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int16_t nsecs = min<int16_t>(getsectordist(pos, *sectnum), INT16_MAX);
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if (nsecs > (walldist + 8))
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{
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Printf("%s(): initial position (%d, %d) not within initial sector %d; shortest distance %d.\n", __func__, pos.x, pos.y, *sectnum, nsecs);
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walldist = 0x7fff;
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}
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static int16_t sectlist[MAXSECTORS];
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static uint8_t sectbitmap[(MAXSECTORS+7)>>3];
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bfirst_search_init(sectlist, sectbitmap, &nsecs, MAXSECTORS, *sectnum);
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for (int sectcnt = 0; sectcnt < nsecs; sectcnt++)
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{
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int const listsectnum = sectlist[sectcnt];
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if (inside_p(pos.x, pos.y, listsectnum))
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SET_AND_RETURN(*sectnum, listsectnum);
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auto const sec = §or[listsectnum];
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int const startwall = sec->wallptr;
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int const endwall = sec->wallptr + sec->wallnum;
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auto uwal = (uwallptr_t)&wall[startwall];
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for (int j = startwall; j < endwall; j++, uwal++)
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if (uwal->nextsector >= 0 && bitmap_test(clipsectormap, uwal->nextsector))
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bfirst_search_try(sectlist, sectbitmap, &nsecs, uwal->nextsector);
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}
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bfirst_search_init(sectlist, sectbitmap, &nsecs, MAXSECTORS, *sectnum);
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|
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for (int sectcnt = 0; sectcnt < nsecs; sectcnt++)
|
|
{
|
|
int const listsectnum = sectlist[sectcnt];
|
|
|
|
if (inside_p(pos.x, pos.y, listsectnum))
|
|
{
|
|
// add sector to clipping list so the next call to clipupdatesector()
|
|
// finishes in the loop above this one
|
|
addclipsect(listsectnum);
|
|
SET_AND_RETURN(*sectnum, listsectnum);
|
|
}
|
|
|
|
auto const sec = §or[listsectnum];
|
|
int const startwall = sec->wallptr;
|
|
int const endwall = sec->wallptr + sec->wallnum;
|
|
auto uwal = (uwallptr_t)&wall[startwall];
|
|
|
|
// check floor curbs here?
|
|
|
|
for (int j = startwall; j < endwall; j++, uwal++)
|
|
if (uwal->nextsector >= 0 && getwalldist(pos, j) <= (walldist + 8))
|
|
bfirst_search_try(sectlist, sectbitmap, &nsecs, uwal->nextsector);
|
|
}
|
|
|
|
*sectnum = -1;
|
|
}
|
|
|
|
//
|
|
// clipmove
|
|
//
|
|
int32_t clipmove(vec3_t * const pos, int16_t * const sectnum, int32_t xvect, int32_t yvect,
|
|
int32_t const walldist, int32_t const ceildist, int32_t const flordist, uint32_t const cliptype)
|
|
{
|
|
if ((xvect|yvect) == 0 || *sectnum < 0)
|
|
return 0;
|
|
|
|
uspriteptr_t curspr=NULL; // non-NULL when handling sprite with sector-like clipping
|
|
|
|
int const initialsectnum = *sectnum;
|
|
|
|
int32_t const dawalclipmask = (cliptype & 65535); // CLIPMASK0 = 0x00010001
|
|
int32_t const dasprclipmask = FixedToInt(cliptype); // 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 = ksqrt(compat_maybe_truncate_to_int32(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;
|
|
|
|
memset(clipsectormap, 0, (numsectors+7)>>3);
|
|
bitmap_set(clipsectormap, *sectnum);
|
|
|
|
do
|
|
{
|
|
int const dasect = clipsectorlist[clipsectcnt++];
|
|
//if (curspr)
|
|
// Printf("sprite %d/%d: sect %d/%d (%d)\n", clipspritecnt,clipspritenum, clipsectcnt,clipsectnum,dasect);
|
|
|
|
////////// Walls //////////
|
|
|
|
auto const sec = (usectorptr_t)§or[dasect];
|
|
int const startwall = sec->wallptr;
|
|
int const endwall = startwall + sec->wallnum;
|
|
auto wal = (uwallptr_t)&wall[startwall];
|
|
|
|
for (native_t j=startwall; j<endwall; j++, wal++)
|
|
{
|
|
auto const wal2 = (uwallptr_t)&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->pos;
|
|
vec2_t p2 = wal2->pos;
|
|
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;
|
|
|
|
if (wal->nextsector < 0 || (wal->cstat&dawalclipmask))
|
|
{
|
|
clipyou = 1;
|
|
}
|
|
else
|
|
{
|
|
clipmove_tweak_pos(pos, diff.x, diff.y, p1.x, p1.y, p2.x, p2.y, &v.x, &v.y);
|
|
clipyou = cliptestsector(dasect, wal->nextsector, flordist, ceildist, v, pos->z);
|
|
}
|
|
|
|
// We're not interested in any sector reached by portal traversal that we're "inside" of.
|
|
if (enginecompatibility_mode == ENGINECOMPATIBILITY_NONE && !curspr && dasect != initialsectnum
|
|
&& inside(pos->x, pos->y, dasect) == 1)
|
|
{
|
|
int k;
|
|
for (k=startwall; k<endwall; k++)
|
|
if (wall[k].nextsector == initialsectnum)
|
|
break;
|
|
if (k == endwall)
|
|
break;
|
|
}
|
|
|
|
if (clipyou)
|
|
{
|
|
int16_t const objtype = curspr ? (int16_t)(curspr - sprite) + 49152 : (int16_t)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, false);
|
|
addclipline(p2.x-bsz, p2.y-bsz, p2.x-bsz, p2.y+bsz, objtype, false);
|
|
bsz = walldist; if (diff.y < 0) bsz = -bsz;
|
|
addclipline(p1.x+bsz, p1.y-bsz, p1.x-bsz, p1.y-bsz, objtype, false);
|
|
addclipline(p2.x+bsz, p2.y-bsz, p2.x-bsz, p2.y-bsz, objtype, false);
|
|
|
|
v.x = walldist; if (d.y > 0) v.x = -v.x;
|
|
v.y = walldist; if (d.x < 0) v.y = -v.y;
|
|
|
|
if (enginecompatibility_mode == ENGINECOMPATIBILITY_NONE && d.x * (pos->y-p1.y-v.y) < (pos->x-p1.x-v.x) * d.y)
|
|
v.x >>= 1, v.y >>= 1;
|
|
|
|
addclipline(p1.x+v.x, p1.y+v.y, p2.x+v.x, p2.y+v.y, objtype, false);
|
|
}
|
|
else if (wal->nextsector>=0)
|
|
{
|
|
if (bitmap_test(clipsectormap, wal->nextsector) == 0)
|
|
addclipsect(wal->nextsector);
|
|
}
|
|
}
|
|
|
|
if (clipmove_warned & 1)
|
|
Printf("clipsectnum >= MAXCLIPSECTORS!\n");
|
|
|
|
if (clipmove_warned & 2)
|
|
Printf("clipnum >= MAXCLIPNUM!\n");
|
|
|
|
////////// Sprites //////////
|
|
|
|
if (dasprclipmask==0)
|
|
continue;
|
|
|
|
int j;
|
|
SectIterator it(dasect);
|
|
while ((j = it.NextIndex()) >= 0)
|
|
{
|
|
auto const spr = (uspriteptr_t)&sprite[j];
|
|
const int32_t cstat = spr->cstat;
|
|
|
|
if ((cstat&dasprclipmask) == 0)
|
|
continue;
|
|
|
|
auto p1 = spr->pos.vec2;
|
|
|
|
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, false);
|
|
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, false);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case CSTAT_SPRITE_ALIGNMENT_WALL:
|
|
{
|
|
int32_t height, daz = spr->z+spriteheightofs(j, &height, 1);
|
|
|
|
if (pos->z > daz-height-flordist && pos->z < daz+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 = { MulScale(bcos(spr->ang + 256), walldist, 14),
|
|
MulScale(bsin(spr->ang + 256), walldist, 14) };
|
|
|
|
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, false);
|
|
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, false);
|
|
}
|
|
|
|
//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, true);
|
|
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, true);
|
|
}
|
|
}
|
|
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((uspriteptr_t) spr, 0, 0, &rxi[0], &rxi[1], &rxi[2], &rxi[3],
|
|
&ryi[0], &ryi[1], &ryi[2], &ryi[3]);
|
|
|
|
vec2_t v = { MulScale(bcos(spr->ang - 256), walldist, 14),
|
|
MulScale(bsin(spr->ang - 256), walldist, 14) };
|
|
|
|
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, false);
|
|
}
|
|
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, false);
|
|
}
|
|
|
|
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, false);
|
|
}
|
|
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, false);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
} while (clipsectcnt < clipsectnum || clipspritecnt < clipspritenum);
|
|
|
|
int32_t hitwalls[4], hitwall;
|
|
int32_t clipReturn = 0;
|
|
|
|
native_t cnt = clipmoveboxtracenum;
|
|
|
|
do
|
|
{
|
|
if (enginecompatibility_mode == ENGINECOMPATIBILITY_NONE && (xvect|yvect))
|
|
{
|
|
for (native_t i=clipnum-1;i>=0;--i)
|
|
{
|
|
if (!bitmap_test(clipignore, i) && clipinsideboxline(pos->x, pos->y, clipit[i].x1, clipit[i].y1, clipit[i].x2, clipit[i].y2, walldist))
|
|
{
|
|
vec2_t const vec = pos->vec2;
|
|
keepaway(&pos->x, &pos->y, i);
|
|
if (inside(pos->x,pos->y, *sectnum) != 1)
|
|
pos->vec2 = vec;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
vec2_t vec = goal;
|
|
|
|
if ((hitwall = cliptrace(pos->vec2, &vec)) >= 0)
|
|
{
|
|
vec2_t const clipr = { clipit[hitwall].x2 - clipit[hitwall].x1, clipit[hitwall].y2 - clipit[hitwall].y1 };
|
|
// clamp to the max value we can utilize without reworking the scaling below
|
|
// this works around the overflow issue that affects dukedc2.map
|
|
int32_t const templl = (int32_t)clamp(compat_maybe_truncate_to_int32((int64_t)clipr.x * clipr.x + (int64_t)clipr.y * clipr.y), INT32_MIN, INT32_MAX);
|
|
|
|
if (templl > 0)
|
|
{
|
|
// I don't know if this one actually overflows or not, but I highly doubt it hurts to check
|
|
int32_t const templl2
|
|
= (int32_t)clamp(compat_maybe_truncate_to_int32((int64_t)(goal.x - vec.x) * clipr.x + (int64_t)(goal.y - vec.y) * clipr.y), INT32_MIN, INT32_MAX);
|
|
int32_t const i = (enginecompatibility_mode == ENGINECOMPATIBILITY_19950829 || (abs(templl2)>>11) < templl) ?
|
|
DivScaleL(templl2, templl, 20) : 0;
|
|
|
|
goal = { MulScale(clipr.x, i, 20)+vec.x, MulScale(clipr.y, i, 20)+vec.y };
|
|
}
|
|
|
|
int32_t tempint;
|
|
if (enginecompatibility_mode == ENGINECOMPATIBILITY_19950829)
|
|
tempint = clipr.x*(move.x>>6)+clipr.y*(move.y>>6);
|
|
else
|
|
tempint = DMulScale(clipr.x, move.x, clipr.y, move.y, 6);
|
|
|
|
for (native_t i=cnt+1, j; i<=clipmoveboxtracenum; ++i)
|
|
{
|
|
j = hitwalls[i];
|
|
|
|
int32_t tempint2;
|
|
if (enginecompatibility_mode == ENGINECOMPATIBILITY_19950829)
|
|
tempint2 = (clipit[j].x2-clipit[j].x1)*(move.x>>6)+(clipit[j].y2-clipit[j].y1)*(move.y>>6);
|
|
else
|
|
tempint2 = DMulScale(clipit[j].x2-clipit[j].x1, move.x, clipit[j].y2-clipit[j].y1, move.y, 6);
|
|
|
|
if ((tempint ^ tempint2) < 0)
|
|
{
|
|
if (enginecompatibility_mode == ENGINECOMPATIBILITY_19961112)
|
|
updatesector(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;
|
|
}
|
|
|
|
if (enginecompatibility_mode == ENGINECOMPATIBILITY_NONE)
|
|
clipupdatesector(vec, sectnum, rad);
|
|
|
|
pos->x = vec.x;
|
|
pos->y = vec.y;
|
|
cnt--;
|
|
} while ((xvect|yvect) != 0 && hitwall >= 0 && cnt > 0);
|
|
|
|
if (enginecompatibility_mode != ENGINECOMPATIBILITY_NONE)
|
|
{
|
|
for (native_t j=0; j<clipsectnum; j++)
|
|
if (inside(pos->x, pos->y, clipsectorlist[j]) == 1)
|
|
{
|
|
*sectnum = clipsectorlist[j];
|
|
return clipReturn;
|
|
}
|
|
|
|
int32_t tempint2, tempint1 = INT32_MAX;
|
|
*sectnum = -1;
|
|
for (native_t j=numsectors-1; j>=0; j--)
|
|
if (inside(pos->x, pos->y, j) == 1)
|
|
{
|
|
if (enginecompatibility_mode != ENGINECOMPATIBILITY_19950829 && (sector[j].ceilingstat&2))
|
|
tempint2 = getceilzofslope(j, pos->x, pos->y) - pos->z;
|
|
else
|
|
tempint2 = sector[j].ceilingz - pos->z;
|
|
|
|
if (tempint2 > 0)
|
|
{
|
|
if (tempint2 < tempint1)
|
|
{
|
|
*sectnum = j; tempint1 = tempint2;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (enginecompatibility_mode != ENGINECOMPATIBILITY_19950829 && (sector[j].floorstat&2))
|
|
tempint2 = pos->z - getflorzofslope(j, pos->x, pos->y);
|
|
else
|
|
tempint2 = pos->z - sector[j].floorz;
|
|
|
|
if (tempint2 <= 0)
|
|
{
|
|
*sectnum = j;
|
|
return clipReturn;
|
|
}
|
|
if (tempint2 < tempint1)
|
|
{
|
|
*sectnum = j; tempint1 = tempint2;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return clipReturn;
|
|
}
|
|
|
|
|
|
//
|
|
// pushmove
|
|
//
|
|
int pushmove(vec3_t *const vect, int16_t *const sectnum,
|
|
int32_t const walldist, int32_t const ceildist, int32_t const flordist, uint32_t const cliptype, bool clear /*= true*/)
|
|
{
|
|
int bad;
|
|
|
|
const int32_t dawalclipmask = (cliptype&65535);
|
|
// const int32_t dasprclipmask = FixedToInt(cliptype);
|
|
|
|
if (*sectnum < 0)
|
|
return -1;
|
|
|
|
int32_t k = 32;
|
|
|
|
int dir = 1;
|
|
do
|
|
{
|
|
int32_t clipsectcnt = 0;
|
|
|
|
bad = 0;
|
|
|
|
if (clear)
|
|
{
|
|
if (enginecompatibility_mode != ENGINECOMPATIBILITY_NONE && *sectnum < 0)
|
|
return 0;
|
|
clipsectorlist[0] = *sectnum;
|
|
clipsectnum = 1;
|
|
|
|
memset(clipsectormap, 0, (numsectors + 7) >> 3);
|
|
bitmap_set(clipsectormap, *sectnum);
|
|
}
|
|
|
|
do
|
|
{
|
|
uwallptr_t wal;
|
|
int32_t startwall, endwall;
|
|
|
|
auto sec = (usectorptr_t)§or[clipsectorlist[clipsectcnt]];
|
|
if (dir > 0)
|
|
startwall = sec->wallptr, endwall = startwall + sec->wallnum;
|
|
else
|
|
endwall = sec->wallptr, startwall = endwall + sec->wallnum;
|
|
|
|
int i;
|
|
|
|
for (i=startwall, wal=(uwallptr_t)&wall[startwall]; i!=endwall; i+=dir, wal+=dir)
|
|
if (clipinsidebox(&vect->vec2, i, walldist-4) == 1)
|
|
{
|
|
int j = 0;
|
|
if (wal->nextsector < 0 || wal->cstat&dawalclipmask) j = 1;
|
|
else
|
|
{
|
|
int32_t daz2;
|
|
vec2_t closest;
|
|
|
|
if (enginecompatibility_mode == ENGINECOMPATIBILITY_19950829)
|
|
closest = vect->vec2;
|
|
else
|
|
{
|
|
//Find closest point on wall (dax, day) to (vect->x, vect->y)
|
|
int32_t dax = wall[wal->point2].x-wal->x;
|
|
int32_t day = wall[wal->point2].y-wal->y;
|
|
int32_t daz = dax*((vect->x)-wal->x) + day*((vect->y)-wal->y);
|
|
int32_t t;
|
|
if (daz <= 0)
|
|
t = 0;
|
|
else
|
|
{
|
|
daz2 = dax*dax+day*day;
|
|
if (daz >= daz2) t = (1<<30); else t = DivScale(daz, daz2, 30);
|
|
}
|
|
dax = wal->x + MulScale(dax, t, 30);
|
|
day = wal->y + MulScale(day, t, 30);
|
|
|
|
closest = { dax, day };
|
|
}
|
|
|
|
j = cliptestsector(clipsectorlist[clipsectcnt], wal->nextsector, flordist, ceildist, closest, vect->z);
|
|
}
|
|
|
|
if (j != 0)
|
|
{
|
|
j = getangle(wall[wal->point2].x-wal->x, wall[wal->point2].y-wal->y);
|
|
int32_t dx = -bsin(j, -11);
|
|
int32_t dy = bcos(j, -11);
|
|
int bad2 = 16;
|
|
do
|
|
{
|
|
vect->x = (vect->x) + dx; vect->y = (vect->y) + dy;
|
|
bad2--; if (bad2 == 0) break;
|
|
} while (clipinsidebox(&vect->vec2, i, walldist-4) != 0);
|
|
bad = -1;
|
|
k--; if (k <= 0) return bad;
|
|
clipupdatesector(vect->vec2, sectnum, walldist);
|
|
if (enginecompatibility_mode == ENGINECOMPATIBILITY_NONE && *sectnum < 0) return -1;
|
|
}
|
|
else if (bitmap_test(clipsectormap, wal->nextsector) == 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;
|
|
|
|
uspriteptr_t 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 = FixedToInt(cliptype);
|
|
|
|
vec2_t closest = pos->vec2;
|
|
if (enginecompatibility_mode == ENGINECOMPATIBILITY_NONE)
|
|
getsectordist(closest, sectnum, &closest);
|
|
else
|
|
getzsofslope(sectnum,closest.x,closest.y,ceilz,florz);
|
|
*ceilhit = sectnum+16384; *florhit = sectnum+16384;
|
|
|
|
clipsectorlist[0] = sectnum;
|
|
clipsectnum = 1;
|
|
clipspritenum = 0;
|
|
memset(clipsectormap, 0, (numsectors+7)>>3);
|
|
bitmap_set(clipsectormap, sectnum);
|
|
|
|
do //Collect sectors inside your square first
|
|
{
|
|
////////// Walls //////////
|
|
|
|
auto const startsec = (usectorptr_t)§or[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 = wall[j].pos;
|
|
vec2_t const v2 = wall[wall[j].point2].pos;
|
|
|
|
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?
|
|
auto const sec = (usectorptr_t)§or[k];
|
|
|
|
if (((sec->ceilingstat&1) == 0) && (pos->z <= sec->ceilingz+(3<<8))) continue;
|
|
if (((sec->floorstat&1) == 0) && (pos->z >= sec->floorz-(3<<8))) continue;
|
|
|
|
if (bitmap_test(clipsectormap, k) == 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;
|
|
//It actually got here, through all the continue's!!!
|
|
int32_t daz, daz2;
|
|
closest = pos->vec2;
|
|
if (enginecompatibility_mode == ENGINECOMPATIBILITY_NONE)
|
|
getsectordist(closest, k, &closest);
|
|
else
|
|
getzsofslope(k, closest.x,closest.y, &daz,&daz2);
|
|
|
|
{
|
|
if (daz > *ceilz)
|
|
*ceilz = daz, *ceilhit = k+16384;
|
|
|
|
if (daz2 < *florz)
|
|
*florz = daz2, *florhit = k+16384;
|
|
}
|
|
}
|
|
}
|
|
clipsectcnt++;
|
|
}
|
|
while (clipsectcnt < clipsectnum || clipspritecnt < clipspritenum);
|
|
|
|
////////// Sprites //////////
|
|
|
|
if (dasprclipmask)
|
|
for (bssize_t i=0; i<clipsectnum; i++)
|
|
{
|
|
int j;
|
|
SectIterator it(clipsectorlist[i]);
|
|
while ((j = it.NextIndex()) >= 0)
|
|
{
|
|
const int32_t cstat = sprite[j].cstat;
|
|
int32_t daz, daz2;
|
|
|
|
if (cstat&dasprclipmask)
|
|
{
|
|
int32_t clipyou = 0;
|
|
|
|
vec2_t v1 = sprite[j].pos.vec2;
|
|
|
|
switch (cstat & CSTAT_SPRITE_ALIGNMENT_MASK)
|
|
{
|
|
case CSTAT_SPRITE_ALIGNMENT_FACING:
|
|
{
|
|
int32_t k = walldist+(sprite[j].clipdist<<2)+1;
|
|
if ((abs(v1.x-pos->x) <= k) && (abs(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((uspriteptr_t)&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((uspriteptr_t) &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 = { MulScale(bcos(sprite[j].ang - 256), walldist + 4, 14),
|
|
MulScale(bsin(sprite[j].ang - 256), walldist + 4, 14) };
|
|
|
|
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, v2, v3, v4);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (clipyou != 0)
|
|
{
|
|
if ((pos->z > daz) && (daz > *ceilz))
|
|
{
|
|
*ceilz = daz;
|
|
*ceilhit = j+49152;
|
|
}
|
|
|
|
if ((pos->z < daz2) && (daz2 < *florz))
|
|
{
|
|
*florz = daz2;
|
|
*florhit = j+49152;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
|
|
// intp: point of currently best (closest) intersection
|
|
int32_t try_facespr_intersect(uspriteptr_t const spr, vec3_t const in,
|
|
int32_t vx, int32_t vy, int32_t vz,
|
|
vec3_t * const intp, int32_t strictly_smaller_than_p)
|
|
{
|
|
vec3_t const sprpos = spr->pos;
|
|
|
|
int32_t const topt = vx * (sprpos.x - in.x) + vy * (sprpos.y - in.y);
|
|
|
|
if (topt <= 0) return 0;
|
|
|
|
int32_t const bot = vx * vx + vy * vy;
|
|
|
|
if (!bot) return 0;
|
|
|
|
vec3_t newpos = { 0, 0, in.z + Scale(vz, topt, bot) };
|
|
int32_t siz;
|
|
int32_t const z1 = sprpos.z + spriteheightofsptr(spr, &siz, 1);
|
|
|
|
if (newpos.z < z1 - siz || newpos.z > z1)
|
|
return 0;
|
|
|
|
int32_t const topu = vx * (sprpos.y - in.y) - vy * (sprpos.x - in.x);
|
|
vec2_t const off = { Scale(vx, topu, bot), Scale(vy, topu, bot) };
|
|
int32_t const dist = off.x * off.x + off.y * off.y;
|
|
|
|
siz = tileWidth(spr->picnum) * spr->xrepeat;
|
|
|
|
if (dist > MulScale(siz, siz, 7)) return 0;
|
|
|
|
newpos.vec2 = { in.x + Scale(vx, topt, bot), in.y + Scale(vy, topt, bot) };
|
|
|
|
if (abs(newpos.x - in.x) + abs(newpos.y - in.y) + strictly_smaller_than_p >
|
|
abs(intp->x - in.x) + abs(intp->y - in.y))
|
|
return 0;
|
|
|
|
*intp = newpos;
|
|
return 1;
|
|
}
|
|
|
|
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, usectorptr_t 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 = (uwallptr_t)&wall[sec->wallptr];
|
|
auto const wal2 = (uwallptr_t)&wall[wal->point2];
|
|
int32_t j, dax=wal2->x-wal->x, day=wal2->y-wal->y;
|
|
|
|
i = ksqrt(compat_maybe_truncate_to_int32(uhypsq(dax,day))); if (i == 0) return 1; //continue;
|
|
i = DivScale(heinum,i, 15);
|
|
dax *= i; day *= i;
|
|
|
|
j = (vz<<8)-DMulScale(dax,vy,-day,vx, 15);
|
|
if (j != 0)
|
|
{
|
|
i = ((z - sv->z)<<8)+DMulScale(dax,sv->y-wal->y,-day,sv->x-wal->x, 15);
|
|
if (((i^j) >= 0) && ((abs(i)>>1) < abs(j)))
|
|
{
|
|
i = DivScale(i,j, 30);
|
|
x1 = sv->x + MulScale(vx,i, 30);
|
|
y1 = sv->y + MulScale(vy,i, 30);
|
|
z1 = sv->z + MulScale(vz,i, 30);
|
|
}
|
|
}
|
|
}
|
|
else if ((how*vz > 0) && (how*sv->z <= how*z))
|
|
{
|
|
z1 = z; i = z1-sv->z;
|
|
if ((abs(i)>>1) < vz*how)
|
|
{
|
|
i = DivScale(i,vz, 30);
|
|
x1 = sv->x + MulScale(vx,i, 30);
|
|
y1 = sv->y + MulScale(vy,i, 30);
|
|
}
|
|
}
|
|
|
|
if ((x1 != INT32_MAX) && (abs(x1-sv->x)+abs(y1-sv->y) < abs((hit->pos.x)-sv->x)+abs((hit->pos.y)-sv->y)))
|
|
{
|
|
if (tmp==NULL)
|
|
{
|
|
if (inside(x1,y1,sec-sector) == 1)
|
|
{
|
|
hit_set(hit, sec-sector, -1, -1, x1, y1, z1);
|
|
hitscan_hitsectcf = (how+1)>>1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
const int32_t curidx=(int32_t)tmp[0];
|
|
auto const curspr=(spritetype *)tmp[1];
|
|
const int32_t thislastsec = tmp[2];
|
|
|
|
if (!thislastsec)
|
|
{
|
|
if (inside(x1,y1,sec-sector) == 1)
|
|
hit_set(hit, curspr->sectnum, -1, curspr-sprite, x1, y1, z1);
|
|
}
|
|
}
|
|
}
|
|
|
|
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;
|
|
|
|
uspriteptr_t curspr = NULL;
|
|
int32_t clipspritecnt, curidx=-1;
|
|
// tmp: { (int32_t)curidx, (spritetype *)curspr, (!=0 if outer sector) }
|
|
intptr_t *tmpptr=NULL;
|
|
const int32_t dawalclipmask = (cliptype&65535);
|
|
const int32_t dasprclipmask = FixedToInt(cliptype);
|
|
|
|
hit->sect = -1; hit->wall = -1; hit->sprite = -1;
|
|
if (sectnum < 0)
|
|
return -1;
|
|
|
|
hit->pos.vec2 = hitscangoal;
|
|
|
|
clipsectorlist[0] = sectnum;
|
|
tempshortcnt = 0;
|
|
tempshortnum = 1;
|
|
clipspritecnt = clipspritenum = 0;
|
|
|
|
do
|
|
{
|
|
int32_t dasector, z, startwall, endwall;
|
|
|
|
dasector = clipsectorlist[tempshortcnt];
|
|
auto const sec = (usectorptr_t)§or[dasector];
|
|
|
|
i = 1;
|
|
if (enginecompatibility_mode != ENGINECOMPATIBILITY_19950829)
|
|
{
|
|
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 = (uwallptr_t)&wall[z];
|
|
auto const wal2 = (uwallptr_t)&wall[wal->point2];
|
|
|
|
int const nextsector = wal->nextsector;
|
|
|
|
if (curspr && nextsector<0) continue;
|
|
|
|
x1 = wal->x; y1 = wal->y; x2 = wal2->x; y2 = wal2->y;
|
|
|
|
if (compat_maybe_truncate_to_int32((coord_t)(x1-sv->x)*(y2-sv->y))
|
|
< compat_maybe_truncate_to_int32((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 (enginecompatibility_mode == ENGINECOMPATIBILITY_19950829)
|
|
{
|
|
if (vz != 0)
|
|
if ((intz <= sec->ceilingz) || (intz >= sec->floorz))
|
|
if (abs(intx-sv->x)+abs(inty-sv->y) < abs(hit->pos.x-sv->x)+abs(hit->pos.y-sv->y))
|
|
{
|
|
//x1,y1,z1 are temp variables
|
|
if (vz > 0) z1 = sec->floorz; else z1 = sec->ceilingz;
|
|
x1 = sv->x + Scale(z1-sv->z,vx,vz);
|
|
y1 = sv->y + Scale(z1-sv->z,vy,vz);
|
|
if (inside(x1,y1,dasector) == 1)
|
|
{
|
|
hit_set(hit, dasector, -1, -1, x1, y1, z1);
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
else if (abs(intx-sv->x)+abs(inty-sv->y) >= abs((hit->pos.x)-sv->x)+abs((hit->pos.y)-sv->y))
|
|
continue;
|
|
|
|
if (!curspr)
|
|
{
|
|
if (enginecompatibility_mode == ENGINECOMPATIBILITY_19950829)
|
|
{
|
|
if ((nextsector < 0) || (wal->cstat&dawalclipmask))
|
|
{
|
|
if ((abs(intx-sv->x)+abs(inty-sv->y) < abs(hit->pos.x-sv->x)+abs(hit->pos.y-sv->y)))
|
|
hit_set(hit, dasector, z, -1, intx, inty, intz);
|
|
continue;
|
|
}
|
|
|
|
if (intz <= sector[nextsector].ceilingz || intz >= sector[nextsector].floorz)
|
|
{
|
|
if ((abs(intx-sv->x)+abs(inty-sv->y) < abs(hit->pos.x-sv->x)+abs(hit->pos.y-sv->y)))
|
|
hit_set(hit, dasector, z, -1, intx, inty, intz);
|
|
continue;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if ((nextsector < 0) || (wal->cstat&dawalclipmask))
|
|
{
|
|
hit_set(hit, dasector, z, -1, intx, inty, intz);
|
|
continue;
|
|
}
|
|
|
|
int32_t daz2;
|
|
getzsofslope(nextsector,intx,inty,&daz,&daz2);
|
|
if (intz <= daz || intz >= daz2)
|
|
{
|
|
hit_set(hit, dasector, z, -1, intx, inty, intz);
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
int zz;
|
|
for (zz = tempshortnum - 1; zz >= 0; zz--)
|
|
if (clipsectorlist[zz] == nextsector) break;
|
|
if (zz < 0) clipsectorlist[tempshortnum++] = nextsector;
|
|
}
|
|
|
|
////////// Sprites //////////
|
|
|
|
if (dasprclipmask==0)
|
|
continue;
|
|
|
|
SectIterator it(dasector);
|
|
while ((z = it.NextIndex()) >= 0)
|
|
{
|
|
auto const spr = (uspriteptr_t)&sprite[z];
|
|
uint32_t const cstat = spr->cstat;
|
|
#ifdef USE_OPENGL
|
|
if (!hitallsprites)
|
|
#endif
|
|
if ((cstat&dasprclipmask) == 0)
|
|
continue;
|
|
|
|
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 (compat_maybe_truncate_to_int32((coord_t)(x1-sv->x)*(y2-sv->y))
|
|
< compat_maybe_truncate_to_int32((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 (abs(intx-sv->x)+abs(inty-sv->y) > abs((hit->pos.x)-sv->x)+abs((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)
|
|
{
|
|
tileUpdatePicnum(&tilenum, 0, 0);
|
|
|
|
if (tileLoad(tilenum))
|
|
{
|
|
// daz-intz > 0 && daz-intz < k
|
|
int32_t xtex = MulScale(ucoefup16, tileWidth(tilenum), 16);
|
|
int32_t vcoefup16 = 65536-DivScale(daz-intz, k, 16);
|
|
int32_t ytex = MulScale(vcoefup16, tileHeight(tilenum), 16);
|
|
|
|
auto texel = (tilePtr(tilenum) + tileHeight(tilenum)*xtex + ytex);
|
|
if (*texel == TRANSPARENT_INDEX)
|
|
continue;
|
|
}
|
|
}
|
|
|
|
hit_set(hit, dasector, -1, z, intx, inty, intz);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case CSTAT_SPRITE_ALIGNMENT_FLOOR:
|
|
{
|
|
int32_t x3, y3, x4, y4, zz;
|
|
intz = z1;
|
|
|
|
if (vz == 0 || ((intz-sv->z)^vz) < 0) continue;
|
|
|
|
if ((cstat&64) != 0)
|
|
if ((sv->z > intz) == ((cstat&8)==0)) continue;
|
|
if (enginecompatibility_mode == ENGINECOMPATIBILITY_NONE)
|
|
{
|
|
// 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);
|
|
}
|
|
|
|
if (abs(intx-sv->x)+abs(inty-sv->y) > abs((hit->pos.x)-sv->x)+abs((hit->pos.y)-sv->y))
|
|
continue;
|
|
|
|
get_floorspr_points((uspriteptr_t)spr, intx, inty, &x1, &x2, &x3, &x4,
|
|
&y1, &y2, &y3, &y4);
|
|
|
|
if (get_floorspr_clipyou({x1, y1}, {x2, y2}, {x3, y3}, {x4, y4}))
|
|
hit_set(hit, dasector, -1, z, intx, inty, intz);
|
|
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
while (++tempshortcnt < tempshortnum || clipspritecnt < clipspritenum);
|
|
|
|
return 0;
|
|
}
|
|
|