ref: 4f514003a8236aaeb9621b932c0f8329e03c1dd8
dir: /bts.c/
#include <u.h>
#include <libc.h>
#include <thread.h>
#include <draw.h>
#include <mouse.h>
#include <cursor.h>
#include <keyboard.h>
#include <geometry.h>
#include "dat.h"
#include "fns.h"
int debug;
Cursor patrolcursor = {
{0, 0},
{ 0x00, 0x00, 0x01, 0x00, 0x03, 0x00, 0x03, 0x80,
0x06, 0x80, 0x06, 0xc0, 0x0e, 0xe0, 0x1e, 0xf0,
0x1f, 0xf8, 0x3f, 0x00, 0x01, 0x00, 0x41, 0x02,
0x7f, 0xfe, 0x7f, 0xfc, 0x3f, 0xf8, 0x00, 0x00,
},
{ 0x03, 0x80, 0x06, 0x80, 0x04, 0xc0, 0x0c, 0x40,
0x09, 0x60, 0x19, 0x30, 0x31, 0x18, 0x21, 0x0c,
0x60, 0x04, 0x40, 0xfc, 0xfe, 0x87, 0xbe, 0xfd,
0x80, 0x01, 0x80, 0x03, 0xc0, 0x06, 0x7f, 0xfc,
},
};
Cursor waitcursor = {
{0, 0},
{ 0x01, 0x80, 0x03, 0xc0, 0x07, 0xe0, 0x07, 0xe0,
0x07, 0xe0, 0x07, 0xe0, 0x03, 0xc0, 0x0f, 0xf0,
0x1f, 0xf8, 0x1f, 0xf8, 0x1f, 0xf8, 0x1f, 0xf8,
0x0f, 0xf0, 0x1f, 0xf8, 0x3f, 0xfc, 0x3f, 0xfc,
},
{ 0x01, 0x80, 0x03, 0xc0, 0x07, 0xe0, 0x04, 0x20,
0x04, 0x20, 0x06, 0x60, 0x02, 0x40, 0x0c, 0x30,
0x10, 0x08, 0x14, 0x08, 0x14, 0x28, 0x12, 0x28,
0x0a, 0x50, 0x16, 0x68, 0x20, 0x04, 0x3f, 0xfc,
}
};
Cursor boxcursor = {
{-7, -7},
{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xf8, 0x1f, 0xf8, 0x1f, 0xf8, 0x1f,
0xf8, 0x1f, 0xf8, 0x1f, 0xf8, 0x1f, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
},
{ 0x00, 0x00, 0x7f, 0xfe, 0x7f, 0xfe, 0x7f, 0xfe,
0x70, 0x0e, 0x70, 0x0e, 0x70, 0x0e, 0x70, 0x0e,
0x70, 0x0e, 0x70, 0x0e, 0x70, 0x0e, 0x70, 0x0e,
0x7f, 0xfe, 0x7f, 0xfe, 0x7f, 0xfe, 0x00, 0x00
}
};
Cursor aimcursor = {
{-7, -7},
{ 0x1f, 0xf8, 0x3f, 0xfc, 0x7f, 0xfe, 0xfb, 0xdf,
0xf3, 0xcf, 0xe3, 0xc7, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xe3, 0xc7, 0xf3, 0xcf,
0x7b, 0xdf, 0x7f, 0xfe, 0x3f, 0xfc, 0x1f, 0xf8,
},
{ 0x00, 0x00, 0x0f, 0xf0, 0x31, 0x8c, 0x21, 0x84,
0x41, 0x82, 0x41, 0x82, 0x41, 0x82, 0x7f, 0xfe,
0x7f, 0xfe, 0x41, 0x82, 0x41, 0x82, 0x41, 0x82,
0x21, 0x84, 0x31, 0x8c, 0x0f, 0xf0, 0x00, 0x00,
}
};
char deffont[] = "/lib/font/bit/pelm/unicode.9.font";
char winspec[32];
Channel *drawchan;
Channel *ingress, *egress;
Mousectl *mctl; /* only used to update the cursor */
RFrame worldrf;
Image *screenb;
Image *tiletab[NTILES];
Board alienboard;
Board localboard;
Ship armada[NSHIPS];
Ship *curship;
int layoutdone;
Point2 lastshot;
struct {
int state;
} game;
struct {
Image *c; /* color */
char *s; /* banner text */
} conclusion;
Point
fromworld(Point2 p)
{
p = invrframexform(p, worldrf);
return Pt(p.x,p.y);
}
Point2
toworld(Point p)
{
return rframexform(Pt2(p.x,p.y,1), worldrf);
}
Point
fromboard(Board *b, Point2 p)
{
p = invrframexform(invrframexform(p, *b), worldrf);
return Pt(p.x,p.y);
}
Point2
toboard(Board *b, Point p)
{
Point2 np;
np = rframexform(rframexform(Pt2(p.x,p.y,1), worldrf), *b);
np.x = (int)np.x;
np.y = (int)np.y;
return np;
}
int
rectXarmada(Rectangle r)
{
int i;
for(i = 0; i < nelem(armada); i++)
if(curship != &armada[i] && rectXrect(r, armada[i].bbox))
return 1;
return 0;
}
Rectangle
mkshipbbox(Point2 p, int o, int ncells)
{
Point2 sv;
switch(o){
case OH: sv = Vec2(1,0); break;
case OV: sv = Vec2(0,1); break;
default: sysfatal("mkshipbbox: wrong ship orientation");
}
return Rpt(
fromboard(&localboard, p),
fromboard(&localboard, addpt2(addpt2(p, mulpt2(sv, ncells)), Vec2(sv.y,sv.x)))
);
}
void
csetcursor(Mousectl *mc, Cursor *c)
{
static Cursor *oc;
if(c == oc)
return;
setcursor(mc, c);
oc = c;
}
void
resetgame(void)
{
int i;
memset(localboard.map, Twater, MAPW*MAPH);
memset(alienboard.map, Twater, MAPW*MAPH);
for(i = 0; i < nelem(armada); i++){
armada[i].bbox = ZR;
memset(armada[i].hit, 0, armada[i].ncells*sizeof(int));
armada[i].sunk = 0;
}
curship = nil;
layoutdone = 0;
}
Point
vstring(Image *dst, Point p, Image *src, Point sp, Font *f, char *s)
{
char buf[2];
buf[1] = 0;
while(*s){
buf[0] = *s++;
string(dst, p, src, sp, f, buf);
p.y += font->height;
}
return p;
}
Image *
gettileimage(int type)
{
if(type < 0 || type > nelem(tiletab))
return nil;
return tiletab[type];
}
void
drawtile(Image *dst, Board *b, Point2 cell, int type)
{
Point p;
Image *ti;
p = fromboard(b, cell);
ti = gettileimage(type);
if(ti == nil)
return;
draw(dst, Rpt(p, addpt(p, Pt(TW,TH))), ti, nil, ZP);
}
void
drawship(Image *dst, Ship *s)
{
Point2 p, sv;
int i;
if(!rectinrect(s->bbox, localboard.bbox))
return;
p = s->p;
switch(s->orient){
case OH: sv = Vec2(1,0); break;
case OV: sv = Vec2(0,1); break;
default: return;
}
for(i = 0; i < s->ncells; i++){
drawtile(dst, &localboard, p, s->hit[i]? Thit: Tship);
p = addpt2(p, sv);
}
}
void
drawships(Image *dst)
{
int i;
for(i = 0; i < nelem(armada); i++)
drawship(dst, &armada[i]);
}
void
drawboard(Image *dst, Board *b)
{
int i, j;
for(i = 0; i < MAPW; i++)
for(j = 0; j < MAPH; j++)
drawtile(dst, b, Pt2(i,j,1), b->map[i][j]);
}
void
drawinfo(Image *dst)
{
static Image *c;
Point p;
char *s, aux[32];
s = nil;
switch(game.state){
case Waiting0: s = "looking for players"; break;
case Outlaying: s = "place the fleet"; break;
case Waiting: s = "wait for your turn"; break;
case Playing: s = "your turn"; break;
}
if(s == nil)
return;
p = Pt(SCRW/2 - stringwidth(font, s)/2, 0);
string(dst, p, display->white, ZP, font, s);
s = "TARGET";
p = subpt(alienboard.bbox.min, Pt(font->width+2,0));
vstring(dst, p, display->white, ZP, font, s);
s = "LOCAL";
p = Pt(localboard.bbox.max.x+2, localboard.bbox.min.y);
vstring(dst, p, display->white, ZP, font, s);
if(game.state == Outlaying){
if(c == nil)
c = eallocimage(display, Rect(0,0,1,1), screen->chan, 1, DYellow);
if(curship != nil){
snprint(aux, sizeof aux, "%s (%d)", shipname(curship-armada), curship->ncells);
p = Pt(SCRW/2 - stringwidth(font, aux)/2, SCRH-Boardmargin);
string(dst, p, c, ZP, font, aux);
}else{
s = "done with the layout?";
p = Pt(SCRW/2 - stringwidth(font, s)/2, SCRH-Boardmargin);
string(dst, p, c, ZP, font, s);
}
}
}
void
redraw(void)
{
lockdisplay(display);
draw(screenb, screenb->r, display->black, nil, ZP);
drawboard(screenb, &alienboard);
drawboard(screenb, &localboard);
drawships(screenb);
drawinfo(screenb);
if(conclusion.s != nil)
string(screenb, Pt(SCRW/2 - stringwidth(font, conclusion.s)/2, font->height+5), conclusion.c, ZP, font, conclusion.s);
draw(screen, screen->r, screenb, nil, ZP);
flushimage(display, 1);
unlockdisplay(display);
if(conclusion.s != nil){
resetgame();
conclusion.s = nil;
sleep(5000);
redraw();
}
}
void
resize(void)
{
int fd;
lockdisplay(display);
if(getwindow(display, Refnone) < 0)
sysfatal("resize failed");
unlockdisplay(display);
/* ignore move events */
if(Dx(screen->r) != SCRW || Dy(screen->r) != SCRH){
fd = open("/dev/wctl", OWRITE);
if(fd >= 0){
fprint(fd, "resize %s", winspec);
close(fd);
}
}
send(drawchan, nil);
}
void
inittiles(void)
{
Image *brush;
int i, x, y;
Point pts[2];
for(i = 0; i < nelem(tiletab); i++){
tiletab[i] = eallocimage(display, Rect(0,0,TW,TH), screen->chan, 0, DNofill);
switch(i){
case Twater:
brush = eallocimage(display, Rect(0,0,1,1), screen->chan, 1, DPalegreyblue);
draw(tiletab[i], tiletab[i]->r, brush, nil, ZP);
freeimage(brush);
brush = eallocimage(display, Rect(0,0,1,1), screen->chan, 1, DPalebluegreen);
for(pts[0] = ZP, x = 0; x < TW; x++){
y = sin(x)*TH/2;
pts[1] = Pt(x,y+TH/2);
line(tiletab[i], pts[0], pts[1], Endsquare, Endsquare, 0, brush, ZP);
pts[0] = pts[1];
}
freeimage(brush);
break;
case Tship:
brush = eallocimage(display, Rect(0,0,1,1), screen->chan, 1, 0xAAAAAAFF);
draw(tiletab[i], tiletab[i]->r, brush, nil, ZP);
freeimage(brush);
brush = eallocimage(display, Rect(0,0,1,1), screen->chan, 1, DBlack);
fillellipse(tiletab[i], Pt(TW/2,TH/2), 2, 2, brush, ZP);
freeimage(brush);
break;
case Thit:
brush = eallocimage(display, Rect(0,0,1,1), screen->chan, 1, DRed);
draw(tiletab[i], tiletab[i]->r, brush, nil, ZP);
freeimage(brush);
brush = eallocimage(display, Rect(0,0,1,1), screen->chan, 1, DBlack);
pts[0] = Pt(TW/2-TW/4,TH/2-TH/4);
pts[1] = Pt(TW/2+TW/4,TH/2+TH/4);
line(tiletab[i], pts[0], pts[1], Endsquare, Endsquare, 1, brush, ZP);
pts[0].y += TH/2;
pts[1].y -= TH/2;
line(tiletab[i], pts[0], pts[1], Endsquare, Endsquare, 1, brush, ZP);
freeimage(brush);
break;
case Tmiss:
draw(tiletab[i], tiletab[i]->r, tiletab[Twater], nil, ZP);
brush = eallocimage(display, Rect(0,0,1,1), screen->chan, 1, DWhite);
ellipse(tiletab[i], Pt(TW/2,TH/2), 6, 6, 1, brush, ZP);
freeimage(brush);
break;
}
}
}
void
initboards(void)
{
memset(alienboard.map, Twater, MAPW*MAPH);
alienboard.p = Pt2(Boardmargin,Boardmargin,1);
alienboard.bx = Vec2(TW,0);
alienboard.by = Vec2(0,TH);
alienboard.bbox = Rpt(fromworld(alienboard.p), fromworld(addpt2(alienboard.p, Pt2(TW*MAPW,TH*MAPH,1))));
memset(localboard.map, Twater, MAPW*MAPH);
localboard.p = addpt2(alienboard.p, Vec2(0,MAPH*TH+TH));
localboard.bx = Vec2(TW,0);
localboard.by = Vec2(0,TH);
localboard.bbox = Rpt(fromworld(localboard.p), fromworld(addpt2(localboard.p, Pt2(TW*MAPW,TH*MAPH,1))));
}
void
initarmada(void)
{
Ship *s;
int i;
for(i = 0; i < nelem(armada); i++){
s = &armada[i];
s->ncells = shiplen(i);
s->orient = OV;
s->hit = emalloc(s->ncells*sizeof(int));
memset(s->hit, 0, s->ncells*sizeof(int));
s->sunk = 0;
}
}
int
confirmdone(Mousectl *mc)
{
/* thanks sigrid! */
Cursor anchor = {
{0, 0},
{ 0x00, 0x00, 0x00, 0x1e, 0x01, 0x92, 0x30, 0xd2,
0x70, 0x7e, 0x60, 0x70, 0x40, 0xf8, 0x41, 0xcc,
0x43, 0x84, 0x47, 0x00, 0x4e, 0x00, 0x5c, 0x00,
0x78, 0x18, 0x70, 0x38, 0x7f, 0xf0, 0x00, 0x00,
},
{ 0x00, 0x3f, 0x03, 0xe1, 0x7a, 0x6d, 0xcb, 0x2d,
0x89, 0x81, 0x99, 0x8f, 0xb3, 0x07, 0xa6, 0x33,
0xac, 0x7a, 0xb8, 0xce, 0xb1, 0x80, 0xa3, 0x3c,
0x86, 0x64, 0x8f, 0xc4, 0x80, 0x0c, 0xff, 0xf8,
},
};
csetcursor(mc, &anchor);
while(mc->buttons == 0)
readmouse(mc);
if(mc->buttons != 4){
csetcursor(mc, nil);
return 0;
}
while(mc->buttons){
if(mc->buttons != 4){
csetcursor(mc, nil);
return 0;
}
readmouse(mc);
}
csetcursor(mc, nil);
return 1;
}
void
lmb(Mousectl *mc)
{
Board *b;
Point2 cell;
b = nil;
if(ptinrect(mc->xy, alienboard.bbox))
b = &alienboard;
else if(ptinrect(mc->xy, localboard.bbox))
b = &localboard;
if(b == nil)
return;
cell = toboard(b, mc->xy);
switch(game.state){
case Outlaying:
if(b == &localboard)
if(curship != nil && rectinrect(curship->bbox, localboard.bbox))
if(++curship-armada >= nelem(armada))
curship = nil;
else if(curship != &armada[0])
curship->orient = (curship-1)->orient;
break;
case Playing:
if(b == &alienboard){
chanprint(egress, "shoot %s\n", cell2coords(cell));
lastshot = cell;
}
break;
}
send(drawchan, nil);
}
void
mmb(Mousectl *mc)
{
if(game.state != Outlaying)
return;
if(curship != nil){
curship->orient = curship->orient == OH? OV: OH;
curship->bbox = mkshipbbox(curship->p, curship->orient, curship->ncells);
if(debug)
fprint(2, "curship orient %c\n", curship->orient == OH? 'h': 'v');
/* steer it, captain! don't let it go off-board! */
if(!rectinrect(curship->bbox, localboard.bbox)){
switch(curship->orient){
case OH:
curship->bbox.min.x -= curship->bbox.max.x-localboard.bbox.max.x;
curship->bbox.max.x = localboard.bbox.max.x;
break;
case OV:
curship->bbox.min.y -= curship->bbox.max.y-localboard.bbox.max.y;
curship->bbox.max.y = localboard.bbox.max.y;
break;
}
curship->p = toboard(&localboard, curship->bbox.min);
moveto(mc, addpt(screen->r.min, curship->bbox.min));
readmouse(mc); /* ignore mmb click triggered by moveto */
}
/* …nor ram allied ships! */
if(rectXarmada(curship->bbox))
curship->bbox = ZR;
send(drawchan, nil);
}
}
void
rmb(Mousectl *mc)
{
enum {
PLACESHIP,
DONE,
};
static char *items[] = {
[PLACESHIP] "place ships",
[DONE] "done",
nil
};
static Menu menu = { .item = items };
char buf[5*(1+3+1)+1];
int i, n;
if(game.state != Outlaying)
return;
mc->xy = addpt(mc->xy, screen->r.min);
switch(menuhit(3, mc, &menu, _screen)){
case PLACESHIP:
if(!layoutdone)
curship = &armada[0];
break;
case DONE:
if(curship != nil || layoutdone)
break;
if(!confirmdone(mc))
break;
n = 0;
for(i = 0; i < nelem(armada); i++){
assert(sizeof buf - n > 1+3+1);
if(i != 0)
buf[n++] = ',';
n += snprint(buf+n, sizeof buf - n, "%s%c",
cell2coords(armada[i].p), armada[i].orient == OH? 'h': 'v');
}
chanprint(egress, "layout %s\n", buf);
layoutdone++;
break;
}
send(drawchan, nil);
}
void
mouse(Mousectl *mc)
{
Rectangle newbbox;
mc->xy = subpt(mc->xy, screen->r.min);
if(game.state == Outlaying && curship != nil){
newbbox = mkshipbbox(toboard(&localboard, mc->xy), curship->orient, curship->ncells);
if(ptinrect(mc->xy, localboard.bbox))
csetcursor(mctl, &boxcursor);
else
csetcursor(mctl, nil);
if(rectinrect(newbbox, localboard.bbox) && !rectXarmada(newbbox)){
curship->p = toboard(&localboard, mc->xy);
curship->bbox = newbbox;
send(drawchan, nil);
}
}
if(game.state == Playing)
if(ptinrect(mc->xy, alienboard.bbox))
csetcursor(mctl, &aimcursor);
else
csetcursor(mctl, nil);
switch(mc->buttons){
case 1:
lmb(mc);
break;
case 2:
mmb(mc);
break;
case 4:
rmb(mc);
break;
}
}
void
key(Rune r)
{
switch(r){
case Kdel:
case 'q':
threadexitsall(nil);
}
}
void
bobross(void *)
{
while(recv(drawchan, nil) > 0)
redraw();
sysfatal("painter died");
}
void
inputthread(void *arg)
{
Input *in;
Rune r;
Alt a[4];
in = arg;
a[0].c = in->mc->c; a[0].v = &in->mc->Mouse; a[0].op = CHANRCV;
a[1].c = in->mc->resizec; a[1].v = nil; a[1].op = CHANRCV;
a[2].c = in->kc->c; a[2].v = &r; a[2].op = CHANRCV;
a[3].op = CHANEND;
for(;;)
switch(alt(a)){
case -1:
sysfatal("input thread interrupted");
case 0:
mouse(in->mc);
break;
case 1:
resize();
break;
case 2:
key(r);
break;
}
}
void
celebrate(void)
{
static Image *c;
static char s[] = "YOU WON!";
if(c == nil)
c = eallocimage(display, Rect(0,0,1,1), screen->chan, 1, DGreen);
conclusion.c = c;
conclusion.s = s;
}
void
keelhaul(void)
{
static Image *c;
static char s[] = "…YOU LOST";
if(c == nil)
c = eallocimage(display, Rect(0,0,1,1), screen->chan, 1, DRed);
conclusion.c = c;
conclusion.s = s;
}
void
processcmd(char *cmd)
{
Point2 cell;
int i;
if(debug)
fprint(2, "rcvd '%s'\n", cmd);
if(strcmp(cmd, "win") == 0){
celebrate();
game.state = Waiting0;
}else if(strcmp(cmd, "lose") == 0){
keelhaul();
game.state = Waiting0;
}
switch(game.state){
case Waiting0:
if(strcmp(cmd, "layout") == 0){
game.state = Outlaying;
curship = &armada[0];
}
csetcursor(mctl, &patrolcursor);
break;
case Outlaying:
if(strcmp(cmd, "wait") == 0){
game.state = Waiting;
csetcursor(mctl, &waitcursor);
}else if(strcmp(cmd, "play") == 0)
game.state = Playing;
break;
case Playing:
if(strcmp(cmd, "wait") == 0){
game.state = Waiting;
csetcursor(mctl, &waitcursor);
}else if(strcmp(cmd, "hit") == 0)
settile(&alienboard, lastshot, Thit);
else if(strcmp(cmd, "miss") == 0)
settile(&alienboard, lastshot, Tmiss);
break;
case Waiting:
if(strcmp(cmd, "play") == 0){
game.state = Playing;
csetcursor(mctl, nil);
}else if(strncmp(cmd, "hit", 3) == 0){
cell = coords2cell(cmd+4);
for(i = 0; i < nelem(armada); i++)
if(ptinrect(fromboard(&localboard, cell), armada[i].bbox)){
cell = subpt2(cell, armada[i].p);
armada[i].hit[(int)vec2len(cell)] = 1;
break;
}
}else if(strncmp(cmd, "miss", 4) == 0){
cell = coords2cell(cmd+5);
settile(&localboard, cell, Tmiss);
}
break;
}
send(drawchan, nil);
}
void
netrecvthread(void *arg)
{
Ioproc *io;
char buf[256], *e;
int n, tot, fd;
fd = *(int*)arg;
io = ioproc();
tot = 0;
while((n = ioread(io, fd, buf+tot, sizeof(buf)-1-tot)) > 0){
tot += n;
buf[tot] = 0;
while((e = strchr(buf, '\n')) != nil){
*e++ = 0;
processcmd(buf);
tot -= e-buf;
memmove(buf, e, tot);
}
if(tot >= sizeof(buf)-1)
tot = 0;
}
closeioproc(io);
threadexitsall("connection lost");
}
void
netsendthread(void *arg)
{
char *s;
int fd;
fd = *(int*)arg;
while(recv(egress, &s) > 0){
if(write(fd, s, strlen(s)) != strlen(s))
break;
if(debug)
fprint(2, "sent '%s'\n", s);
free(s);
}
threadexitsall("connection lost");
}
void
usage(void)
{
fprint(2, "usage: %s [-d] addr\n", argv0);
threadexitsall("usage");
}
void
threadmain(int argc, char *argv[])
{
char *addr;
int fd;
Input in;
GEOMfmtinstall();
ARGBEGIN{
case 'd':
debug++;
break;
default: usage();
}ARGEND
if(argc != 1)
usage();
addr = netmkaddr(argv[0], "tcp", "3047");
if(debug)
fprint(2, "connecting to %s\n", addr);
fd = dial(addr, nil, nil, nil);
if(fd < 0)
sysfatal("dial: %r");
else if(debug)
fprint(2, "line established\n");
snprint(winspec, sizeof winspec, "-dx %d -dy %d", SCRW, SCRH);
if(newwindow(winspec) < 0)
sysfatal("newwindow: %r");
if(initdraw(nil, deffont, "bts") < 0)
sysfatal("initdraw: %r");
if((in.mc = initmouse(nil, screen)) == nil)
sysfatal("initmouse: %r");
if((in.kc = initkeyboard(nil)) == nil)
sysfatal("initkeyboard: %r");
display->locking = 1;
unlockdisplay(display);
mctl = in.mc;
screenb = eallocimage(display, rectsubpt(screen->r, screen->r.min), screen->chan, 0, DNofill);
worldrf.p = Pt2(0,0,1);
worldrf.bx = Vec2(1,0);
worldrf.by = Vec2(0,1);
inittiles();
initboards();
initarmada();
game.state = Waiting0;
csetcursor(mctl, &patrolcursor);
drawchan = chancreate(sizeof(void*), 0);
ingress = chancreate(sizeof(char*), 1);
egress = chancreate(sizeof(char*), 1);
threadcreate(bobross, nil, mainstacksize);
threadcreate(inputthread, &in, mainstacksize);
threadcreate(netrecvthread, &fd, mainstacksize);
threadcreate(netsendthread, &fd, mainstacksize);
send(drawchan, nil);
yield();
}