Function StartWalk3

Source/player.cpp:1382–1462

#if defined(__clang__) || defined(__GNUC__)
__attribute__((no_sanitize("shift-base")))
#endif
void StartWalk3(int pnum, int xvel, int yvel, int xoff, int yoff, int xadd, int yadd, int mapx, int mapy, int EndDir, int sdir)
{
	int px, py, x, y;

	if ((DWORD)pnum >= MAX_PLRS) {
		app_fatal("StartWalk3: illegal player %d", pnum);
	}

	if (plr[pnum]._pInvincible && !plr[pnum]._pHitPoints && pnum == myplr) {
		SyncPlrKill(pnum, -1);
		return;
	}

	SetPlayerOld(pnum);
	px = xadd + plr[pnum].WorldX;
	py = yadd + plr[pnum].WorldY;
	x = mapx + plr[pnum].WorldX;
	y = mapy + plr[pnum].WorldY;

	if (!PlrDirOK(pnum, EndDir)) {
		return;
	}

	plr[pnum]._px = px;
	plr[pnum]._py = py;

	if (pnum == myplr) {
		ScrollInfo._sdx = plr[pnum].WorldX - ViewX;
		ScrollInfo._sdy = plr[pnum].WorldY - ViewY;
	}

	dPlayer[plr[pnum].WorldX][plr[pnum].WorldY] = -1 - pnum;
	dPlayer[px][py] = -1 - pnum;
	plr[pnum]._pVar4 = x;
	plr[pnum]._pVar5 = y;
	dFlags[x][y] |= BFLAG_PLAYERLR;
	plr[pnum]._pxoff = xoff;
	plr[pnum]._pyoff = yoff;

	if (leveltype) {
		ChangeLightXY(plr[pnum]._plid, x, y);
		PM_ChangeLightOff(pnum);
	}

	plr[pnum]._pmode = PM_WALK3;
	plr[pnum]._pxvel = xvel;
	plr[pnum]._pyvel = yvel;
	plr[pnum]._pVar1 = px;
	plr[pnum]._pVar2 = py;
	plr[pnum]._pVar6 = xoff * 256;
	plr[pnum]._pVar7 = yoff * 256;
	plr[pnum]._pVar3 = EndDir;

	if (!(plr[pnum]._pGFXLoad & PFILE_WALK)) {
		LoadPlrGFX(pnum, PFILE_WALK);
	}