sdlbomber/game.c

#include "bomber.h"
#include "game.h"
#include "gfx.h"
#include "network.h"
#include "draw.h"
#include "utils.h"
#include "sound.h"
#include "menu.h"
#include "list.h"

static int gameframe;

static list activebombs;
static list activedecays;
static list activebonus;
static list activegeneric;

static bomb *detonated[MAXBOMBSDETONATED];
static int detonateput=0;
static int detonatetake=0;

static list activeflames;
static list activeplayers;

figure walking[MAXSETS][NUMWALKFRAMES];
solid background,backgroundoriginal;

/* The playfield array, contains FIELD_* equates */
unsigned char field[32][32];
void *info[32][32];

char exitflag = 0;
static int framecount = 0;

char playername[16];

static int mycount;

static int bonustotal;
static const int bonuschances[]= {
TILE_BOMB,20,
TILE_FLAME,20,
TILE_TRIGGER,2,
TILE_GOLDFLAME,2,
TILE_SKATES,20,
TILE_TURTLE,5,
TILE_NONE,160
};

static GameOptions gameoptions;

static const unsigned char playerpositions[MAXNETNODES*3] = { /* color, x, y */
2,0,0,
3,14,10,
4,14,0,
5,0,10,
1,6,0,
6,8,10,
7,0,6,
8,14,4,
};

static void initplayer(int color,int x,int y,int controller) {
	player *pl;

	pl=allocentry();
	if(!pl)
		nomem("Couldn't get player structure (allocentry())");
	addtail(&activeplayers,pl);
	memset(pl,0,sizeof(player));
	pl->xpos=arraytoscreenx(x);
	pl->ypos=arraytoscreeny(y);
	pl->color=color;
	pl->speed=SPEEDSTART;
	pl->flags=0;
	pl->fixx=-4;
	pl->fixy=-40;
	pl->flamelength=gameoptions.flames+1;
	pl->bombsavailable=gameoptions.bombs+1;
	pl->controller=controller;
	field[y][x]=FIELD_EMPTY;
	if(x) field[y][x-1]=FIELD_EMPTY;
	if(y) field[y-1][x]=FIELD_EMPTY;
	if(x<arraynumx-1) field[y][x+1]=FIELD_EMPTY;
	if(y<arraynumy-1) field[y+1][x]=FIELD_EMPTY;
}

static void initplayers(void) {
	int i;
	const unsigned char *p;
	int c,x,y;

	if(NETWORK_NONE == network) {
		initplayer(2,0,0,-1);
		return;
	}
	p=playerpositions;
	for(i=0;i<MAXNETNODES;++i) {
		if(!netnodes[i].used) continue;
		c=*p++;
		x=*p++;
		y=*p++;
		initplayer(c,x,y,i);
	}
}

static void firstzero(void) {
	mycount = mydatacount = 0;
	memset(latestactions,0,sizeof(latestactions));
	memset(latestcounts,0,sizeof(latestcounts));
	memset(actionblock,0,sizeof(actionblock));
	actioncount = 0;
}

static void initgame() {
	int i,j;
	int x,y;
	int bl;
	const int *p;
	int comp;

	if (network != NETWORK_SLAVE)
		set_game_options(&configopts);
	gameframe=0;
	allocthings();
	initheader(&activebombs);
	initheader(&activeflames);
	initheader(&activedecays);
	initheader(&activebonus);
	initheader(&activeplayers);
	initheader(&activegeneric);

	detonateput=detonatetake=0;

	p=bonuschances;
	bonustotal=0;
	for(;;) {
		i=*p++;
		if(i==TILE_NONE) break;
		bonustotal+=*p++;
	}
	bonustotal += 64*(3-gameoptions.generosity);
	memset(field,0,sizeof(field));
	comp=gameoptions.density;
	for(j=0;j<arraynumy;++j)
		for(i=0;i<arraynumx;++i) {
/*			if((i&j)&1) {
				field[j][i]=FIELD_BORDER;
			} else*/
				field[j][i]=
				(myrand()&3)>=comp ? FIELD_BRICK : FIELD_EMPTY;
		}

	solidcopyany(&backgroundoriginal,&background,0,0,IXSIZE,IYSIZE);

	initplayers();

	for(j=0;j<arraynumy;++j) {
		y=arraystarty+j*arrayspacey;
		for(i=0;i<arraynumx;++i) {
			x=arraystartx+i*arrayspacex;
			bl=field[j][i];
			if(bl==FIELD_BORDER) bl=2;
			else if(bl==FIELD_BRICK) bl=1;
			else continue;
			drawfigureany(x,y,blocks+bl,&background);
		}
	}
	solidcopy(&background,0,0,IXSIZE,IYSIZE);
	copyup();
}

static void addflame(player *owner,int px,int py) {
	flame *fl,*fl2;

	fl=allocentry();
	if(!fl) return;
	addtail(&activeflames,fl);
	field[py][px]=FIELD_FLAME;
	info[py][px]=fl;
	fl->px=px;
	fl->py=py;
	fl->xpos=arraytoscreenx(px);
	fl->ypos=arraytoscreeny(py);
	fl->owner=owner;
	if(px && field[py][px-1]==FIELD_FLAME) {
		fl2=info[py][px-1];
		fl->lurd|=FL_LEFT;
		fl2->lurd|=FL_RIGHT;
	}
	if(py && field[py-1][px]==FIELD_FLAME) {
		fl2=info[py-1][px];
		fl->lurd|=FL_UP;
		fl2->lurd|=FL_DOWN;
	}
	if(px<arraynumx-1 && field[py][px+1]==FIELD_FLAME) {
		fl2=info[py][px+1];
		fl->lurd|=FL_RIGHT;
		fl2->lurd|=FL_LEFT;
	}
	if(py<arraynumy-1 && field[py+1][px]==FIELD_FLAME) {
		fl2=info[py+1][px];
		fl->lurd|=FL_DOWN;
		fl2->lurd|=FL_UP;
	}
}

static void dropbomb(player *pl,int px,int py,int type){
	bomb *bmb;

	if(field[py][px]!=FIELD_EMPTY) return;
	bmb=allocentry();
	if(!bmb) return;
	playsound(3);
	addtail(&activebombs,bmb);

	--(pl->bombsavailable);
	field[py][px]=FIELD_BOMB;
	info[py][px]=bmb;
	bmb->type=type;
	bmb->px=px;
	bmb->py=py;
	bmb->xpos=arraytoscreenx(px);
	bmb->ypos=arraytoscreeny(py);
	bmb->power=pl->flamelength;
	bmb->owner=pl;
}

static void adddetonate(bomb *bmb) {
	if(bmb->type==BOMB_OFF) return;

	bmb->type=BOMB_OFF;
	field[bmb->py][bmb->px]=FIELD_EXPLODING;
	info[bmb->py][bmb->px]=0;
	detonated[detonateput++]=bmb;
	detonateput%=MAXBOMBSDETONATED;
}

static void processbombs() {
	bomb *bmb;

	bmb=activebombs.next;
	while(bmb) {
		switch(bmb->type) {
		case BOMB_NORMAL:
			++bmb->timer;
			if(bmb->timer==BOMBLIFE)
				adddetonate(bmb);
			++(bmb->figcount);
			break;
		case BOMB_CONTROLLED:
			++(bmb->figcount);
			break;
		}
		bmb=bmb->next;
	}
}

static void adddecay(int px,int py) {
	brickdecay *bd;
	int xpos,ypos;

	bd=allocentry();
	if(!bd) return;
	field[py][px]=FIELD_EXPLODING;
	bd->xpos=arraytoscreenx(px);
	bd->ypos=arraytoscreeny(py);
	bd->px=px;
	bd->py=py;
	addtail(&activedecays,bd);
	xpos=tovideox(bd->xpos);
	ypos=tovideoy(bd->ypos);
	solidcopyany(&backgroundoriginal,&background,xpos,ypos,
		arrayspacex,arrayspacey);
	solidcopy(&background,xpos,ypos,arrayspacex,arrayspacey);
}

static void addbonus(int px,int py,int type) {
	bonustile *bonus;

	bonus=allocentry();
	if(!bonus) return;
	addtail(&activebonus,bonus);
	bonus->px=px;
	bonus->py=py;
	bonus->xpos=arraytoscreenx(px);
	bonus->ypos=arraytoscreeny(py);
	bonus->type=type;
	field[py][px]=FIELD_BONUS;
	info[py][px]=bonus;
}

static void trybonus(int px,int py) {
	int i=0, r;
	const int *p;

	if(field[py][px]!=FIELD_EMPTY) return;
	p=bonuschances;
	r=myrand()%bonustotal;
	while(r>=0) {
		i=*p++;
		r-=*p++;
	}
	if(i==TILE_NONE) return;
	addbonus(px,py,i);
}

static void deletebonus(bonustile *bonus) {
	int px,py;

	px=bonus->px;
	py=bonus->py;
	field[py][px]=0;
	info[py][px]=0;
	delink(&activebonus,bonus);
}

static void flameshaft(player *owner,int px,int py,int dx,int dy,int power) {
	int there;
	bomb *bmb;

	while(power--) {
		px+=dx;
		py+=dy;
		if(px<0 || py<0 || px>=arraynumx || py>=arraynumy) break;
		there=field[py][px];
		switch(there) {
		case FIELD_BOMB:
			bmb=info[py][px];
			adddetonate(bmb);
			break;
		case FIELD_EMPTY:
			addflame(owner,px,py);
			break;
		case FIELD_BRICK:
			adddecay(px,py);
			power=0;
			break;
		case FIELD_BONUS:
			deletebonus(info[py][px]);
			power=0;
			break;
		case FIELD_BORDER:
		case FIELD_EXPLODING:
		default:
			power=0;
		case FIELD_FLAME:
			break;
		}
	}
}

static void detonatebomb(bomb *bmb) {
	int px,py;
	int power;
	player *owner;

	++(bmb->owner->bombsavailable);
	px=bmb->px;
	py=bmb->py;
	power=bmb->power;
	owner=bmb->owner;
	delink(&activebombs,bmb);
	addflame(owner,px,py);
	flameshaft(owner,px,py,-1,0,power);
	flameshaft(owner,px,py,0,-1,power);
	flameshaft(owner,px,py,1,0,power);
	flameshaft(owner,px,py,0,1,power);
}

static void dodetonations(void) {
	int i=0;

	while(detonatetake!=detonateput) {
		++i;
		detonatebomb(detonated[detonatetake]);
		detonatetake=(detonatetake+1) % MAXBOMBSDETONATED;
	}
	if(i) playsound((myrand()&1) ? 0 : 4);
}

static void processflames(void) {
	flame *fl,*fl2;

	fl=activeflames.next;
	while(fl) {
		++(fl->timer);
		fl=fl->next;
	}
	fl=activeflames.next;
	while(fl) {
		if(fl->timer==FLAMELIFE)
		{
			field[fl->py][fl->px]=FIELD_EMPTY;
			info[fl->py][fl->px]=0;
			fl2=fl;
			fl=fl->next;
			delink(&activeflames,fl2);
		} else
			fl=fl->next;
	}
}

static void processdecays() {
	brickdecay *bd,*bd2;

	bd=activedecays.next;
	while(bd) {
		++(bd->timer);
		if(bd->timer==DECAYLIFE) {
			field[bd->py][bd->px]=FIELD_EMPTY;
			trybonus(bd->px,bd->py);
			bd2=bd;
			bd=bd->next;
			delink(&activedecays,bd2);
		} else
			bd=bd->next;
	}
}

static void drawbombs(void) {
	int j;
	bomb *bmb;
	struct figure *figtab;
	int color;
	int xpos,ypos;

	bmb=activebombs.next;
	while(bmb) {
		color=bmb->owner->color;
		figtab=(bmb->type==BOMB_NORMAL) ? bombs1[color] : bombs2[color];
		j=bmb->figcount % (NUMBOMBFRAMES<<1);
		if(j>=NUMBOMBFRAMES) j=(NUMBOMBFRAMES<<1)-j-1;
		xpos=tovideox(bmb->xpos);
		ypos=tovideoy(bmb->ypos)-3;

		addsprite(xpos,ypos,figtab+j);
		bmb=bmb->next;
	}
}

static void drawflames(void) {
	flame *fl;
	int xpos,ypos;
	int color;
	int fig;

	fl=activeflames.next;
	while(fl) {
		color=fl->owner->color;
		xpos=tovideox(fl->xpos);
		ypos=tovideoy(fl->ypos);
		fig=(fl->timer*10)/FLAMELIFE;
		if(fig>=5) fig=9-fig;
		fig+=5*fl->lurd;
		addsprite(xpos,ypos,flamefigs[0/* color */]+fig);
		fl=fl->next;
	}
}

static void drawdecays() {
	brickdecay *bd;

	bd=activedecays.next;
	while(bd) {
		addsprite(tovideox(bd->xpos),tovideoy(bd->ypos),
			blocksx+(bd->timer*9)/DECAYLIFE);
		bd=bd->next;
	}
}

static void drawbonus() {
	bonustile *bonus;

	bonus=activebonus.next;
	while(bonus) {
		addsprite(tovideox(bonus->xpos),tovideoy(bonus->ypos),
			tiles+bonus->type);
		bonus=bonus->next;
	}
}

static void drawplayers() {
	player *pl;
	int xpos,ypos;

	pl=activeplayers.next;

	while(pl) {
		if(!(pl->flags & FLG_DEAD)) {
			if(!pl->figure)
				pl->figure=walking[pl->color]+30;
			xpos=tovideox(pl->xpos)+pl->fixx;
			ypos=tovideoy(pl->ypos)+pl->fixy;
			addsprite(xpos,ypos,pl->figure);
		}
		pl=pl->next;
	}
}

static void detonatecontrolled(player *pl) {
	bomb *bmb;

	bmb=activebombs.next;
	while(bmb) {
		if(bmb->owner==pl && bmb->type==BOMB_CONTROLLED)
			adddetonate(bmb);
		bmb=bmb->next;
	}
}

static void playonce(generic *gen) {
	if(gen->timer==gen->data1)
		delink(&activegeneric,gen);
}

static void drawgeneric(generic *gen) {
	addsprite(gen->xpos,gen->ypos,((figure *)(gen->ptr1))+gen->timer);
}

static void queuesequence(int xpos,int ypos,figure *fig,int count) {
	generic *gen;

	gen=allocentry();
	if(!gen) return;
	gen->xpos=xpos;
	gen->ypos=ypos;
	gen->data1=count;
	gen->process=playonce;
	gen->draw=drawgeneric;
	gen->ptr1=fig;
	addtail(&activegeneric,gen);
}

static void adddeath(player *pl) {
	int xpos,ypos;

	xpos=tovideox(pl->xpos)+pl->fixx-10;
	ypos=tovideoy(pl->ypos)+pl->fixy;
	queuesequence(xpos,ypos,death,NUMDEATHFRAMES);
}

static void killplayer(player *pl) {
	pl->flags|=FLG_DEAD;
	playsound(2);
	adddeath(pl);
	detonatecontrolled(pl);
}

static void processgenerics(void) {
	generic *gen,*gen2;

	gen=activegeneric.next;
	while(gen) {
		gen2=gen;
		gen=gen->next;
		++(gen2->timer);
		gen2->process(gen2);
	}
}

static void drawgenerics(void) {
	generic *gen;

	gen=activegeneric.next;
	while(gen) {
		gen->draw(gen);
		gen=gen->next;
	}
}

static int centerxchange(player *pl) {
	int speed;
	int val;
	int line;
	int max;

	max=arrayspacex<<FRACTION;
	speed=pl->speed;
	val=pl->xpos+(max<<2);
	val%=max;
	line=max>>1;
	if(val<line) {
		if(val-speed<0)
			return -val;
		else
			return -speed;
	} else if(val>=line) {
		if(val+speed>max)
			return max-val;
		else
			return speed;
	}
	return 0;
}

static void centerx(player *pl) {
	pl->xpos+=centerxchange(pl);
}

static int centerychange(player *pl) {
	int speed;
	int val;
	int line;
	int max;

	max=arrayspacey<<FRACTION;
	speed=pl->speed;
	val=pl->ypos+(max<<2);
	val%=max;
	line=max>>1;
	if(val<line)
	{
		if(val-speed<0)
			return -val;
		else
			return -speed;
	} else if(val>=line)
	{
		if(val+speed>max)
			return max-val;
		else
			return speed;
	}
	return 0;
}

static void centery(player *pl) {
	pl->ypos+=centerychange(pl);
}

#define SGN(x) ((x)==0 ? 0 : ((x)<0 ? -1 : 1))

static void trymove(player *pl,int dx,int dy) {
	int wx,wy;
	int sx,sy;
	int there;
	int px,py;
	static int depth=0;
	int tx,ty;

	++depth;
	sx=(dx*(arrayspacex+1)) << (FRACTION-1);
	sy=(dy*(arrayspacey+1)) << (FRACTION-1);

	wx=screentoarrayx(pl->xpos+sx);
	wy=screentoarrayy(pl->ypos+sy);
	px=screentoarrayx(pl->xpos);
	py=screentoarrayy(pl->ypos);

	if(wx<0 || wx>=arraynumx || wy<0 || wy>=arraynumy) 	{
		--depth;
		return;
	}
	there=field[wy][wx];
	if((px!=wx || py!=wy) &&
		(there==FIELD_BRICK||there==FIELD_BOMB||there==FIELD_BORDER))
	{
		if(dx && !dy) {
			ty=centerychange(pl);
			if(ty && depth==1)
				trymove(pl,0,-SGN(ty));

		} else if(dy && !dx) {
			tx=centerxchange(pl);
			if(tx && depth==1)
				trymove(pl,-SGN(tx),0);
		}

	} else {
		pl->xpos+=dx*pl->speed;
		pl->ypos+=dy*pl->speed;
		if(dx && !dy) centery(pl);
		if(dy && !dx) centerx(pl);
	}
	--depth;
}


static void applybonus(player *pl,bonustile *bonus) {
	int type;
	int maxflame;

	maxflame=arraynumx>arraynumy ? arraynumx : arraynumy;
	type=bonus->type;
	deletebonus(bonus);
	switch(type) {
	case TILE_BOMB:
		if (pl->bombsavailable < 9)
			++(pl->bombsavailable);
		break;
	case TILE_FLAME:
		if(pl->flamelength<maxflame)
			++(pl->flamelength);
		break;
	case TILE_GOLDFLAME:
		pl->flamelength=maxflame;
		break;
	case TILE_TRIGGER:
		pl->flags|=FLG_CONTROL;
		break;
	case TILE_SKATES:
		if (pl->speed < SPEEDSTART) {
			pl->speed = SPEEDSTART;
		} else {
			pl->speed+=SPEEDDELTA;
		}
		if(pl->speed>SPEEDMAX) pl->speed=SPEEDMAX;
		break;
	case TILE_TURTLE:
		pl->speed=SPEEDTURTLE;
		pl->speedturtle_timeout=SPEEDTURTLE_TIMEOUT;
		break;
	}
}

static void doplayer(player *pl) {
	int last;
	int color;
	int speed;
	int px,py;
	int there;
	int flags;
	int what;

	if(pl->controller==-1)
		what=myaction;
	else
		what=actions[pl->controller];

	flags=pl->flags;
	if(flags&FLG_DEAD) return;
	color=pl->color;
	last=pl->doing;
	pl->doing=what;
	speed=pl->speed;
	px=screentoarrayx(pl->xpos);
	py=screentoarrayy(pl->ypos);
	there=field[py][px];

	if(what==ACT_QUIT) {
		killplayer(pl);
		return;
	}

	if(there==FIELD_BONUS) {
		playsound((myrand()&1) ? 1 : 5);
		applybonus(pl,info[py][px]);
	} else if(there==FIELD_FLAME) {
		killplayer(pl);
		return;
	}

//	if(what&ACT_TURBO) speed<<=2;
	if(what&ACT_PRIMARY) {
		if(there==FIELD_EMPTY && pl->bombsavailable)
			dropbomb(pl,px,py,
				(flags&FLG_CONTROL) ? BOMB_CONTROLLED :BOMB_NORMAL);
	}
	if(what&ACT_SECONDARY && (flags&FLG_CONTROL))
		detonatecontrolled(pl);

	switch(what&ACT_MASK) {
	case ACT_UP:
		trymove(pl,0,-1);
		pl->figcount=(pl->figcount+1)%15;
		pl->figure=walking[color]+pl->figcount+15;
		break;
	case ACT_DOWN:
		trymove(pl,0,1);
		pl->figcount=(pl->figcount+1)%15;
		pl->figure=walking[color]+pl->figcount+30;
		break;
	case ACT_LEFT:
		trymove(pl,-1,0);
		pl->figcount=(pl->figcount+1)%15;
		pl->figure=walking[color]+pl->figcount+45;
		break;
	case ACT_RIGHT:
		trymove(pl,1,0);
		pl->figcount=(pl->figcount+1)%15;
		pl->figure=walking[color]+pl->figcount;
		break;
	case ACT_NONE:
		break;
	}

	if (pl->speedturtle_timeout > 0) {
		pl->speedturtle_timeout--;
		if (0 == pl->speedturtle_timeout) {
			if (pl->speed < SPEEDSTART) pl->speed = SPEEDSTART;
		}
	}
}

static void processplayers(void) {
	player *pl,*pl2;

	pl=activeplayers.next;
	while(pl) {
		pl2=pl;
		pl=pl->next;
		doplayer(pl2);
	}
}

static void processquits(void) {
	int i;

	if (network != NETWORK_SLAVE) return;
	for (i = 0; i < MAXNETNODES; ++i) {
		if (netnodes[i].used && actions[i]==ACT_QUIT)
			netnodes[i].used=0;
	}
}

static int getaction(void) {
	int what;

	what=ACT_NONE;
	if(checkpressed(MYLEFT)) what=ACT_LEFT;
	else if(checkpressed(MYRIGHT)) what=ACT_RIGHT;
	else if(checkpressed(MYDOWN)) what=ACT_DOWN;
	else if(checkpressed(MYUP)) what=ACT_UP;
	else if(checkdown(13)) what=ACT_ENTER;
	else if(checkdown(0x1b)) what=ACT_QUIT;

	if(checkdown(' '))
		what|=ACT_PRIMARY;
	if(checkdown('b'))
		what|=ACT_SECONDARY;

	return what;
}

static int iterate(void) {
	int i;
	int gountil; /* destination tick */
	static int deathcount = 0;

	mypause();
	scaninput();

	erasesprites();
	clearspritelist();
	gfxunlock();

	myaction = getaction();
	if (NETWORK_NONE == network && myaction==ACT_QUIT) return CODE_QUIT;
	if (NETWORK_NONE == network) {
		gountil = mycount + 1; /* single step in singly player mode */
	} else {
		gountil = networktraffic(); /* as master single step, as slave as many as we can do */
	}

	while (mycount < gountil) { /* simulate ticks up to gountil */
		++mycount;
		if (NETWORK_NONE != network) {
			i = gountil - mycount;
			if(i >= ACTIONHIST) // too far behind
				goto leave_game;
			memcpy(actions, actionblock+i*MAXNETNODES, MAXNETNODES);
			if (actions[myslot] == ACT_QUIT) return CODE_QUIT;
		}
		processbombs();
		dodetonations();
		processdecays();
		processflames();
		processgenerics();
		processquits();
		processplayers();
	}

/*
	if(!(rand()&127))
	{
		i=gtime();
		while(gtime()-i<100);
	}
*/

	drawbombs();
	drawbonus();
	drawgenerics();
	drawdecays();
	drawflames();
	drawplayers();
	plotsprites();
	copyup();
	if(!activegeneric.next) {
		player *pl;
		int deadplayers = 0;
		i = 0;
		for (pl = activeplayers.next; pl; pl = pl->next) {
			if(!(pl->flags & FLG_DEAD))
				++i;
			else
				deadplayers++;
		}
		if (deadplayers > 0 && (!i || (NETWORK_NONE != network && i==1))) {
			++deathcount;
			if(deathcount==25)
				return CODE_ALLDEAD;
		} else
			deathcount=0;
	}
	return CODE_CONT;

leave_game: /* client disconnect/timeout: send ACT_QUIT to master */
	myaction = ACT_QUIT;
	networktraffic();
	return CODE_QUIT;
}

void set_game_options(GameOptions *options) {
	gameoptions = *options;
}

void run_single_player(void) {
	int code;
	network = NETWORK_NONE;

	firstzero();
	do {
		initgame();
		while(!(code=iterate()) && !exitflag) ++framecount;
	} while (code != CODE_QUIT && !exitflag);
}

void run_network_game(void) {
	int code;

	firstzero();
	do {
		initgame();
		while (!(code=iterate()) && !exitflag) ++framecount;
	} while (code != CODE_QUIT && !exitflag);
}