game.c

小型游戏引擎

											sector[j].ceilingstat |= 64;
											sector[j].floorstat |= 64;
										}
										subwaytracksector[subwaytrackcnt][subwaynumsectors[subwaytrackcnt]] = j;
										subwaynumsectors[subwaytrackcnt]++;
									}
					}

				subwayvel[subwaytrackcnt] = 64;
				subwaypausetime[subwaytrackcnt] = 720;

				startwall = sector[i].wallptr;
				endwall = startwall+sector[i].wallnum;
				for(k=startwall;k<endwall;k++)
					if (wall[k].x > subwaytrackx1[subwaytrackcnt])
						if (wall[k].y > subwaytracky1[subwaytrackcnt])
							if (wall[k].x < subwaytrackx2[subwaytrackcnt])
								if (wall[k].y < subwaytracky2[subwaytrackcnt])
									setinterpolation(&wall[k].x);

				for(j=1;j<subwaynumsectors[subwaytrackcnt];j++)
				{
					dasector = subwaytracksector[subwaytrackcnt][j];

					startwall = sector[dasector].wallptr;
					endwall = startwall+sector[dasector].wallnum;
					for(k=startwall;k<endwall;k++)
						setinterpolation(&wall[k].x);

					for(k=headspritesect[dasector];k>=0;k=nextspritesect[k])
						if (statrate[sprite[k].statnum] < 0)
							setinterpolation(&sprite[k].x);
				}


				subwaytrackcnt++;
				break;
		}
		if (sector[i].floorpicnum == FLOORMIRROR)
			floormirrorsector[mirrorcnt++] = i;
	}

		/* Scan wall tags */

	mirrorcnt = 0;
	tilesizx[MIRROR] = 0;
	tilesizy[MIRROR] = 0;
	for(i=0;i<MAXMIRRORS;i++)
	{
		tilesizx[i+MIRRORLABEL] = 0;
		tilesizy[i+MIRRORLABEL] = 0;
	}

	ypanningwallcnt = 0;
	for(i=0;i<numwalls;i++)
	{
		if (wall[i].lotag == 1) ypanningwalllist[ypanningwallcnt++] = i;
		s = wall[i].nextsector;
		if ((s >= 0) && (wall[i].overpicnum == MIRROR) && (wall[i].cstat&32))
		{
			if ((sector[s].floorstat&1) == 0)
			{
				wall[i].overpicnum = MIRRORLABEL+mirrorcnt;
				sector[s].ceilingpicnum = MIRRORLABEL+mirrorcnt;
				sector[s].floorpicnum = MIRRORLABEL+mirrorcnt;
				sector[s].floorstat |= 1;
				mirrorwall[mirrorcnt] = i;
				mirrorsector[mirrorcnt] = s;
				mirrorcnt++;
			}
			else
				wall[i].overpicnum = sector[s].ceilingpicnum;
		}
	}

		/* Invalidate textures in sector behind mirror */
	for(i=0;i<mirrorcnt;i++)
	{
		k = mirrorsector[i];
		startwall = sector[k].wallptr;
		endwall = startwall + sector[k].wallnum;
		for(j=startwall;j<endwall;j++)
		{
			wall[j].picnum = MIRROR;
			wall[j].overpicnum = MIRROR;
		}
	}

		/* Scan sprite tags&picnum's */

	turnspritecnt = 0;
	for(i=0;i<MAXSPRITES;i++)
	{
		if (sprite[i].lotag == 3) turnspritelist[turnspritecnt++] = i;

		if (sprite[i].statnum < MAXSTATUS)    /* That is, if sprite exists */
			switch(sprite[i].picnum)
			{
				case BROWNMONSTER:              /* All cases here put the sprite */
					if ((sprite[i].cstat&128) == 0)
					{
						sprite[i].z -= ((tilesizy[sprite[i].picnum]*sprite[i].yrepeat)<<1);
						sprite[i].cstat |= 128;
					}
					sprite[i].extra = sprite[i].ang;
					sprite[i].clipdist = mulscale7(sprite[i].xrepeat,tilesizx[sprite[i].picnum]);
					if (sprite[i].statnum != 1) changespritestat(i,2);   /* on waiting for you (list 2) */
					sprite[i].lotag = mulscale5(sprite[i].xrepeat,sprite[i].yrepeat);
					sprite[i].cstat |= 0x101;    /* Set the hitscan sensitivity bit */
					break;
				case AL:
					sprite[i].cstat |= 0x101;    /* Set the hitscan sensitivity bit */
					sprite[i].lotag = 0x60;
					changespritestat(i,0);
					break;
				case EVILAL:
					sprite[i].cstat |= 0x101;    /* Set the hitscan sensitivity bit */
					sprite[i].lotag = 0x60;
					changespritestat(i,10);
					break;
			}
	}

	for(i=MAXSPRITES-1;i>=0;i--) copybuf(&sprite[i].x,&osprite[i].x,3);

	searchmap(cursectnum[connecthead]);

	lockclock = 0;
	ototalclock = 0;
	gotlastpacketclock = 0;

	screensize = xdim;
	dax = ((xdim-screensize)>>1);
	dax2 = dax+screensize-1;
	day = (((ydim-32)-scale(screensize,ydim-32,xdim))>>1);
	day2 = day + scale(screensize,ydim-32,xdim)-1;
	setview(dax,day,dax2,day2);

	startofdynamicinterpolations = numinterpolations;
}


long changehealth(short snum, short deltahealth)
{
	/*long dax, day;*/
	/*short good, k, startwall, endwall, s;*/

	if (health[snum] > 0)
	{
		health[snum] += deltahealth;
		if (health[snum] > 999) health[snum] = 999;

		if (health[snum] <= 0)
		{
			health[snum] = -1;
			wsayfollow("death.wav",4096L+(krand()&127)-64,256L,&posx[snum],&posy[snum],1);
			sprite[playersprite[snum]].picnum = SKELETON;
		}

		if ((snum == screenpeek) && (screensize <= xdim))
		{
			if (health[snum] > 0)
				sprintf((char*)&tempbuf,"Health:%3ld",health[snum]);
			else
				sprintf((char*)&tempbuf,"YOU STINK!");

			printext((xdim>>1)-(strlen(tempbuf)<<2),ydim-24,tempbuf,ALPHABET,80);
		}
	}
	return(health[snum] <= 0);      /* You were just injured */
}


void changenumbombs(short snum, short deltanumbombs) {   /* Andy did this */
	numbombs[snum] += deltanumbombs;
	if (numbombs[snum] > 999) numbombs[snum] = 999;
	if (numbombs[snum] <= 0) {
		wsayfollow("doh.wav",4096L+(krand()&127)-64,256L,&posx[snum],&posy[snum],1);
		numbombs[snum] = 0;
	}

	if ((snum == screenpeek) && (screensize <= xdim)) {
		sprintf((char*)&tempbuf,"B:%3d",numbombs[snum]);
		printext(8L,(ydim - 28L),tempbuf,ALPHABET,80);
	}
}


void changenummissiles(short snum, short deltanummissiles) {   /* Andy did this */
	nummissiles[snum] += deltanummissiles;
	if (nummissiles[snum] > 999) nummissiles[snum] = 999;
	if (nummissiles[snum] <= 0) {
		wsayfollow("doh.wav",4096L+(krand()&127)-64,256L,&posx[snum],&posy[snum],1);
		nummissiles[snum] = 0;
	}

	if ((snum == screenpeek) && (screensize <= xdim)) {
		sprintf((char*)&tempbuf,"M:%3d",nummissiles[snum]);
		printext(8L,(ydim - 20L),tempbuf,ALPHABET,80);
	}
}


void changenumgrabbers(short snum, short deltanumgrabbers) {   /* Andy did this */
	numgrabbers[snum] += deltanumgrabbers;
	if (numgrabbers[snum] > 999) numgrabbers[snum] = 999;
	if (numgrabbers[snum] <= 0) {
		wsayfollow("doh.wav",4096L+(krand()&127)-64,256L,&posx[snum],&posy[snum],1);
		numgrabbers[snum] = 0;
	}

	if ((snum == screenpeek) && (screensize <= xdim)) {
		sprintf((char*)&tempbuf,"G:%3d",numgrabbers[snum]);
		printext(8L,(ydim - 12L),tempbuf,ALPHABET,80);
	}
}


void findrandomspot(long *x, long *y, short *sectnum)
{
	short startwall, endwall, s, dasector;
	long dax, day, daz, minx, maxx, miny, maxy, cnt;

	for(cnt=256;cnt>=0;cnt--)
	{
		do
		{
			dasector = mulscale16(krand(),numsectors);
		} while ((sector[dasector].ceilingz+(8<<8) >= sector[dasector].floorz) || ((sector[dasector].lotag|sector[dasector].hitag) != 0) || ((sector[dasector].floorstat&1) != 0));

		startwall = sector[dasector].wallptr;
		endwall = startwall+sector[dasector].wallnum;
		if (endwall <= startwall) continue;

		dax = 0L;
		day = 0L;
		minx = 0x7fffffff; maxx = 0x80000000;
		miny = 0x7fffffff; maxy = 0x80000000;

		for(s=startwall;s<endwall;s++)
		{
			dax += wall[s].x;
			day += wall[s].y;
			if (wall[s].x < minx) minx = wall[s].x;
			if (wall[s].x > maxx) maxx = wall[s].x;
			if (wall[s].y < miny) miny = wall[s].y;
			if (wall[s].y > maxy) maxy = wall[s].y;
		}

		if ((maxx-minx <= 256) || (maxy-miny <= 256)) continue;

		dax /= (endwall-startwall);
		day /= (endwall-startwall);

		if (inside(dax,day,dasector) == 0) continue;

		daz = sector[dasector].floorz-(32<<8);
		if (pushmove(&dax,&day,&daz,&dasector,128L,4<<8,4<<8,CLIPMASK0) < 0) continue;

		*x = dax; *y = day; *sectnum = dasector;
		return;
	}
}


long getanimationgoal(long animptr)
{
	long i;

	for(i=animatecnt-1;i>=0;i--)
		if ((long *)animptr == animateptr[i]) return(i);
	return(-1);
}


long setanimation(long *animptr, long thegoal, long thevel, long theacc)
{
	long i, j;

	if (animatecnt >= MAXANIMATES) return(-1);

	j = animatecnt;
	for(i=animatecnt-1;i>=0;i--)
		if (animptr == animateptr[i])
			{ j = i; break; }

	setinterpolation(animptr);

	animateptr[j] = animptr;
	animategoal[j] = thegoal;
	animatevel[j] = thevel;
	animateacc[j] = theacc;
	if (j == animatecnt) animatecnt++;
	return(j);
}


void operatesector(short dasector)
{     /* Door code */
	long i, j, datag;
	long daz, dax2, day2, centx, centy;
	short startwall, endwall, wallfind[2];

	datag = sector[dasector].lotag;

	startwall = sector[dasector].wallptr;
	endwall = startwall + sector[dasector].wallnum;
	centx = 0L, centy = 0L;
	for(i=startwall;i<endwall;i++)
	{
		centx += wall[i].x;
		centy += wall[i].y;
	}
	centx /= (endwall-startwall);
	centy /= (endwall-startwall);

		/* Simple door that moves up  (tag 8 is a combination of tags 6 & 7) */
	if ((datag == 6) || (datag == 8))    /* If the sector in front is a door */
	{
		i = getanimationgoal((long)&sector[dasector].ceilingz);
		if (i >= 0)      /* If door already moving, reverse its direction */
		{
			if (datag == 8)
				daz = ((sector[dasector].ceilingz+sector[dasector].floorz)>>1);
			else
				daz = sector[dasector].floorz;

			if (animategoal[i] == daz)
				animategoal[i] = sector[nextsectorneighborz(dasector,sector[dasector].floorz,-1,-1)].ceilingz;
			else
				animategoal[i] = daz;
			animatevel[i] = 0;
		}
		else      /* else insert the door's ceiling on the animation list */
		{
			if (sector[dasector].ceilingz == sector[dasector].floorz)
				daz = sector[nextsectorneighborz(dasector,sector[dasector].floorz,-1,-1)].ceilingz;
			else
			{
				if (datag == 8)
					daz = ((sector[dasector].ceilingz+sector[dasector].floorz)>>1);
				else
					daz = sector[dasector].floorz;
			}
			if ((j = setanimation(&sector[dasector].ceilingz,daz,6L,6L)) >= 0)
				wsayfollow("updowndr.wav",4096L+(krand()&255)-128,256L,&centx,&centy,0);
		}
	}
		/* Simple door that moves down */
	if ((datag == 7) || (datag == 8)) /* If the sector in front's elevator */
	{
		i = getanimationgoal((long)&sector[dasector].floorz);
		if (i >= 0)      /* If elevator already moving, reverse its direction */
		{
			if (datag == 8)
				daz = ((sector[dasector].ceilingz+sector[dasector].floorz)>>1);
			else
				daz = sector[dasector].ceilingz;

			if (animategoal[i] == daz)
				animategoal[i] = sector[nextsectorneighborz(dasector,sector[dasector].ceilingz,1,1)].floorz;
			else
				animategoal[i] = daz;
			animatevel[i] = 0;
		}
		else      /* else insert the elevator's ceiling on the animation list */
		{
			if (sector[dasector].floorz == sector[dasector].ceilingz)
				daz = sector[nextsectorneighborz(dasector,sector[dasector].ceilingz,1,1)].floorz;
			else
			{
				if (datag == 8)
					daz = ((sector[dasector].ceilingz+sector[dasector].floorz)>>1);
				else
					daz = sector[dasector].ceilingz;
			}
			if ((j = setanimation(&sector[dasector].floorz,daz,6L,6L)) >= 0)
				wsayfollow("updowndr.wav",4096L+(krand()&255)-128,256L,&centx,&centy,0);
		}
	}

	if (datag == 9)   /* Smooshy-wall sideways double-door */
	{
		/*
         * find any points with either same x or same y coordinate
		 *  as center (centx, centy) - should be 2 points found.
         */
		wallfind[0] = -1;
		wallfind[1] = -1;
		for(i=startwall;i<endwall;i++)
			if ((wall[i].x == centx) || (wall[i].y == centy))
			{
				if (wallfind[0] == -1)
					wallfind[0] = i;
				else
					wallfind[1] = i;
			}

		for(j=0;j<2;j++)
		{
			if ((wall[wallfind[j]].x == centx) && (wall[wallfind[j]].y == centy))
			{
				/*
                 * find what direction door should open by averaging the
				 *  2 neighboring points of wallfind[0] & wallfind[1].
                 */
				i = wallfind[j]-1; if (i < startwall) i = endwall-1;
				dax2 = ((wall[i].x+wall[wall[wallfind[j]].point2].x)>>1)-wall[wallfind[j]].x;
				day2 = ((wall[i].y+wall[wall[wallfind[j]].point2].y)>>1)-wall[wallfind[j]].y;
				if (dax2 != 0)
				{
					dax2 = wall[wall[wall[wallfind[j]].point2].point2].x;
					dax2 -= wall[wall[wallfind[j]].point2].x;
					setanimation(&wall[wallfind[j]].x,wall[wallfind[j]].x+dax2,4L,0L);