ref: bcc3ca5d8b65c479a2323d548ae7be5425c5a074
dir: /rfx.c/
#include <u.h>
#include <libc.h>
#include <draw.h>
#include <thread.h>
#include <keyboard.h>
#include <mouse.h>
#include <cursor.h>
typedef struct Tg Tg;
struct Tg{
Point;
Point v;
int r;
Tg *p;
Tg *n;
};
Tg troot;
Tg *tg;
vlong tics;
int ntg;
int hits, misses, misclicks;
uint bmask = 1;
int oldb;
enum{
NSEC = 1000000000
};
/* recommend these are set well outside the confort range, but not so much so
* that every game lasts less than a minute */
vlong div, div0 = NSEC/20; /* tic duration (ns) */
int tddd = 220; /* tic duration decrease delay (tics) */
int Δ0 = 100; /* tic duration delta factor */
int mtdt = 5; /* tics/tddd % mtdt: delay to tgmax++ */
int floatdt = 25; /* floating text delay (tics) */
int newdt = 8; /* target spawn delay (tics) */
int dmax, rmax = 24; /* max target radius (px) */
int tgmax = 3; /* initial max number of targets onscreen */
int missmax = 10; /* max targets let go */
int nogrow; /* don't grow and shrink targets */
int done;
enum{
CBACK,
CTARG,
CMISS,
CTXT,
CEND
};
Image *col[CEND];
Image *fb;
Rectangle winxy; /* spawning area */
Mousectl *mctl;
Keyboardctl *kctl;
Channel *ticc;
#define trr() (rmax+1 - t->r % (rmax+1))
#define tr() (nogrow ? rmax : t->r <= rmax ? t->r : trr())
Image *
eallocim(Rectangle r, int repl, ulong col)
{
Image *i;
i = allocimage(display, r, screen->chan, repl, col);
if(i == nil)
sysfatal("allocimage: %r");
return i;
}
void
tic(void *)
{
vlong t, dt, δ;
t = nsec();
dt = div/1000000;
for(;;){
if(dt >= 0){
sleep(dt);
if(nbsend(ticc, nil) < 0)
break;
}
δ = div;
dt = (t + 2*δ - nsec()) / 1000000;
t += δ;
}
}
Tg *
push(void)
{
Tg *t;
t = mallocz(sizeof *t, 1);
if(t == nil)
sysfatal("talloc: %r");
t->p = tg->p;
t->n = tg;
tg->p->n = t;
tg->p = t;
return t;
}
void
pop(Tg *t)
{
t->p->n = t->n;
t->n->p = t->p;
free(t);
}
void
nuke(void)
{
while(tg->n != tg)
pop(tg->n);
ntg = 0;
}
void
drw(Tg *t)
{
int r;
r = tr();
fillellipse(fb, *t, r, r, col[CTARG], ZP);
}
void
clr(Tg *t)
{
draw(fb, Rpt(*t, t->v), col[CBACK], nil, ZP);
}
void
txt(char *s, Tg *t, Image *i)
{
Point o;
if(t == nil)
o = subpt(divpt(winxy.max, 2), divpt(stringsize(font, s), 2));
else{
o = divpt(stringsize(font, s), 2);
t->v = addpt(*t, o);
t->x -= o.x;
t->y -= o.y;
o = *t;
}
string(fb, o, i, ZP, font, s);
}
void
misclk(Point o)
{
Tg *t;
/* FIXME: often doesn't do anything */
fillellipse(fb, o, 1, 1, col[CTARG], ZP);
t = push();
t->v = addpt(o, Pt(2,2));
t->x = o.x - 1;
t->y = o.y - 1;
t->r = dmax+1;
misclicks++;
}
void
hit(Tg *t)
{
int r;
r = tr();
fillellipse(fb, *t, r, r, col[CBACK], ZP);
pop(t);
ntg--;
hits++;
}
void
miss(Tg *t)
{
int r;
r = nogrow ? rmax : 1;
fillellipse(fb, *t, r, r, col[CBACK], ZP);
txt("miss", t, col[CMISS]);
misses++;
ntg--;
}
void
grow(Tg *t)
{
if(nogrow)
return;
drw(t);
}
void
shrink(Tg *t)
{
int r;
if(nogrow)
return;
r = trr();
fillellipse(fb, *t, r, r, col[CBACK], ZP);
r--;
fillellipse(fb, *t, r, r, col[CTARG], ZP);
}
void
spawn(void)
{
Tg *t;
t = push();
ntg++;
t->x = winxy.min.x + nrand(winxy.max.x - winxy.min.x);
t->y = winxy.min.y + nrand(winxy.max.y - winxy.min.y);
if(nogrow){
t->r = rmax;
drw(t);
}
}
void
check(int b, Point m)
{
Point o;
Tg *t;
/* FIXME: implement counters for each button */
USED(b);
m = subpt(m, screen->r.min);
for(t=tg->n; t != tg; t=t->n){
if(t->r > dmax)
continue;
o = subpt(*t, m);
if(hypot(o.x, o.y) < tr()){
hit(t);
return;
}
}
misclk(m);
}
void
plaster(void)
{
draw(screen, screen->r, fb, nil, ZP);
flushimage(display, 1);
}
void
score(void)
{
char s[64];
sprint(s, "hit %d misses %d misclicks %d", hits, misses, misclicks);
txt(s, nil, col[CTXT]);
plaster();
}
void
adv(void)
{
Tg *t;
tics++;
if(tics % tddd == 0){
div -= div0 / Δ0;
if(tics / tddd % mtdt == 0)
tgmax++;
}
for(t=tg->n; t != tg; t=t->n){
t->r++;
if(t->r <= rmax)
grow(t);
else if(t->r > rmax && t->r <= dmax)
shrink(t);
else if(t->r == dmax+1){
miss(t);
if(misses >= missmax){
done++;
score();
}
}else if(t->r > dmax+floatdt){
clr(t);
pop(t);
}
}
if(tics % newdt == 0 && ntg < tgmax)
spawn();
}
void
dreset(void)
{
Tg *t;
winxy = rectsubpt(insetrect(screen->r, rmax), screen->r.min);
if(Dx(winxy) < 3*dmax || Dy(winxy) < 3*dmax)
sysfatal("window too small");
freeimage(fb);
fb = eallocim(Rect(0,0,Dx(screen->r),Dy(screen->r)), 0, DNofill);
draw(fb, fb->r, col[CBACK], nil, ZP);
for(t=tg->n; t != tg; t=t->n){
if(t->r > dmax)
continue;
drw(t);
}
if(done)
score();
plaster();
}
void
init(void)
{
div = div0;
tics = 0;
hits = misses = misclicks = 0;
done = 0;
}
void
usage(void)
{
print("%s [-g] [-d newdt] [-h div0] [-i Δ0] [-m nmiss] [-o rmax] [-r tddd] [-t 1-5]\n", argv0);
threadexitsall("usage");
}
void
threadmain(int argc, char *argv[])
{
Rectangle d;
Rune r;
ARGBEGIN{
case 'd':
newdt = strtol(EARGF(usage()), nil, 0);
break;
case 'g':
nogrow++;
break;
case 'h':
div0 = strtoll(EARGF(usage()), nil, 0);
if(div0 <= 0)
sysfatal("invalid divisor %lld", div0);
div0 = NSEC / div0;
break;
case 'i':
Δ0 = strtol(EARGF(usage()), nil, 0);
if(Δ0 <= 0)
sysfatal("invalid divisor divisor %d", Δ0);
break;
case 'm':
missmax = strtol(EARGF(usage()), nil, 0);
break;
case 'o':
rmax = strtol(EARGF(usage()), nil, 0);
break;
case 'r':
tddd = strtol(EARGF(usage()), nil, 0);
break;
case 't':
bmask = 31 >> 5 - strtol(EARGF(usage()), nil, 0);
break;
default:
usage();
}ARGEND
dmax = rmax*2;
tg = &troot;
tg->n = tg->p = tg;
if(initdraw(nil, nil, "rfx") < 0)
sysfatal("initdraw: %r");
d = Rect(0,0,1,1);
col[CBACK] = display->black;
col[CTARG] = eallocim(d, 1, 0x990000ff);
col[CMISS] = eallocim(d, 1, 0x440000ff);
col[CTXT] = eallocim(d, 1, 0xbb4400ff);
dreset();
mctl = initmouse(nil, screen);
if(mctl == nil)
sysfatal("initmouse: %r");
kctl = initkeyboard(nil);
if(kctl == nil)
sysfatal("initkeyboard: %r");
ticc = chancreate(sizeof(int), 0);
if(ticc == nil)
sysfatal("chancreate: %r");
srand(time(nil));
init();
if(proccreate(tic, nil, 8192) < 0)
sysfatal("proccreate tproc: %r");
enum{ATIC, AMOUSE, ARESIZE, AKEY, AEND};
Alt a[AEND+1] = {
[ATIC] {ticc, nil, CHANRCV},
[AMOUSE] {mctl->c, &mctl->Mouse, CHANRCV},
[ARESIZE] {mctl->resizec, nil, CHANRCV},
[AKEY] {kctl->c, &r, CHANRCV},
[AEND] {nil, nil, CHANEND}
};
for(;;){
switch(alt(a)){
case ATIC:
if(done)
break;
adv();
plaster();
break;
case AMOUSE:
if(!done && mctl->buttons & bmask && mctl->buttons & ~oldb)
check(mctl->buttons, mctl->xy);
oldb = mctl->buttons;
break;
case ARESIZE:
if(getwindow(display, Refnone) < 0)
sysfatal("getwindow: %r");
dreset();
break;
case AKEY:
switch(r){
case 'n':
nuke();
init();
draw(fb, fb->r, col[CBACK], nil, ZP);
plaster();
break;
case 'q':
case Kdel:
nuke();
threadexitsall(nil);
}
break;
}
}
}