int h;
} Ball;
-Paddle l_paddle;
-Paddle r_paddle;
-Ball ball;
-static int bx,by;
-static int m_unit;
-static int paddle_rate;
-
-static analogtv *tv;
-static analogtv_input *inp;
-static analogtv_reception reception;
-
-static int paddle_ntsc[4];
-static int field_ntsc[4];
-static int ball_ntsc[4];
-static int score_ntsc[4];
-static int net_ntsc[4];
+struct state {
+ Display *dpy;
+ Window window;
+
+ Paddle l_paddle;
+ Paddle r_paddle;
+ Ball ball;
+ int bx,by;
+ int m_unit;
+ int paddle_rate;
+
+ analogtv *tv;
+ analogtv_input *inp;
+ analogtv_reception reception;
+
+ int paddle_ntsc[4];
+ int field_ntsc[4];
+ int ball_ntsc[4];
+ int score_ntsc[4];
+ int net_ntsc[4];
+
+ analogtv_font score_font;
+};
-analogtv_font score_font;
enum {
PONG_W = ANALOGTV_VIS_LEN,
};
static void
-hit_top_bottom(void)
+hit_top_bottom(struct state *st)
{
- if ( (ball.y <= PONG_TMARG) ||
- (ball.y+ball.h >= PONG_H) )
- by=-by;
+ if ( (st->ball.y <= PONG_TMARG) ||
+ (st->ball.y+st->ball.h >= PONG_H) )
+ st->by=-st->by;
}
-void
-new_game(void)
+static void
+new_game(struct state *st)
{
/* Starts a Whole New Game*/
- ball.x = PONG_W/2;
- ball.y = PONG_H/2;
- bx = m_unit;
- by = m_unit;
-
- l_paddle.wait = 1;
- l_paddle.lock = 0;
- r_paddle.wait = 0;
- r_paddle.lock = 0;
- paddle_rate = m_unit-1;
- r_paddle.score = 0;
- l_paddle.score = 0;
-
- l_paddle.h = PONG_H/4;
- r_paddle.h = PONG_H/4;
+ st->ball.x = PONG_W/2;
+ st->ball.y = PONG_H/2;
+ st->bx = st->m_unit;
+ st->by = st->m_unit;
+
+ /* jwz: perhaps not totally accurate, but randomize things a little bit
+ so that games on multiple screens are not identical. */
+ if (random() & 1) st->by = -st->by;
+ st->ball.y += (random() % (PONG_H/6))-(PONG_H/3);
+
+ st->l_paddle.wait = 1;
+ st->l_paddle.lock = 0;
+ st->r_paddle.wait = 0;
+ st->r_paddle.lock = 0;
+ st->paddle_rate = st->m_unit-1;
+ st->r_paddle.score = 0;
+ st->l_paddle.score = 0;
+
+ st->l_paddle.h = PONG_H/4;
+ st->r_paddle.h = PONG_H/4;
}
-void
-start_game(void)
+static void
+start_game(struct state *st)
{
/*Init the ball*/
- ball.x = PONG_W/2;
- ball.y = PONG_H/2;
- bx = m_unit;
- by = m_unit;
-
- l_paddle.wait = 1;
- l_paddle.lock = 0;
- r_paddle.wait = 0;
- r_paddle.lock = 0;
- paddle_rate = m_unit-1;
-
- if (l_paddle.h > 10) l_paddle.h= l_paddle.h*19/20;
- if (r_paddle.h > 10) r_paddle.h= r_paddle.h*19/20;
+ st->ball.x = PONG_W/2;
+ st->ball.y = PONG_H/2;
+ st->bx = st->m_unit;
+ st->by = st->m_unit;
+
+ /* jwz: perhaps not totally accurate, but randomize things a little bit
+ so that games on multiple screens are not identical. */
+ if (random() & 1) st->by = -st->by;
+ st->ball.y += (random() % (PONG_H/6))-(PONG_H/3);
+
+ st->l_paddle.wait = 1;
+ st->l_paddle.lock = 0;
+ st->r_paddle.wait = 0;
+ st->r_paddle.lock = 0;
+ st->paddle_rate = st->m_unit-1;
+
+ if (st->l_paddle.h > 10) st->l_paddle.h= st->l_paddle.h*19/20;
+ if (st->r_paddle.h > 10) st->r_paddle.h= st->r_paddle.h*19/20;
}
static void
-hit_paddle(void)
+hit_paddle(struct state *st)
{
- if ( ball.x + ball.w >= r_paddle.x &&
- bx > 0 ) /*we are traveling to the right*/
+ if ( st->ball.x + st->ball.w >= st->r_paddle.x &&
+ st->bx > 0 ) /*we are traveling to the right*/
{
- if ((ball.y + ball.h > r_paddle.y) &&
- (ball.y < r_paddle.y + r_paddle.h))
+ if ((st->ball.y + st->ball.h > st->r_paddle.y) &&
+ (st->ball.y < st->r_paddle.y + st->r_paddle.h))
{
- bx=-bx;
- l_paddle.wait = 0;
- r_paddle.wait = 1;
- r_paddle.lock = 0;
- l_paddle.lock = 0;
+ st->bx=-st->bx;
+ st->l_paddle.wait = 0;
+ st->r_paddle.wait = 1;
+ st->r_paddle.lock = 0;
+ st->l_paddle.lock = 0;
}
else
{
- r_paddle.score++;
- if (r_paddle.score >=10)
- new_game();
+ st->r_paddle.score++;
+ if (st->r_paddle.score >=10)
+ new_game(st);
else
- start_game();
+ start_game(st);
}
}
- if (ball.x <= l_paddle.x + l_paddle.w &&
- bx < 0 ) /*we are traveling to the left*/
+ if (st->ball.x <= st->l_paddle.x + st->l_paddle.w &&
+ st->bx < 0 ) /*we are traveling to the left*/
{
- if ( ball.y + ball.h > l_paddle.y &&
- ball.y < l_paddle.y + l_paddle.h)
+ if ( st->ball.y + st->ball.h > st->l_paddle.y &&
+ st->ball.y < st->l_paddle.y + st->l_paddle.h)
{
- bx=-bx;
- l_paddle.wait = 1;
- r_paddle.wait = 0;
- r_paddle.lock = 0;
- l_paddle.lock = 0;
+ st->bx=-st->bx;
+ st->l_paddle.wait = 1;
+ st->r_paddle.wait = 0;
+ st->r_paddle.lock = 0;
+ st->l_paddle.lock = 0;
}
else
{
- l_paddle.score++;
- if (l_paddle.score >= 10)
- new_game();
+ st->l_paddle.score++;
+ if (st->l_paddle.score >= 10)
+ new_game(st);
else
- start_game();
+ start_game(st);
}
}
}
-static void
-init_pong (Display *dpy, Window window)
+static void *
+pong_init (Display *dpy, Window window)
{
- tv=analogtv_allocate(dpy, window);
- analogtv_set_defaults(tv, "");
- tv->event_handler = screenhack_handle_event;
+ struct state *st = (struct state *) calloc (1, sizeof(*st));
+ st->dpy = dpy;
+ st->window = window;
+ st->tv=analogtv_allocate(st->dpy, st->window);
+ analogtv_set_defaults(st->tv, "");
- analogtv_make_font(dpy, window, &score_font,
+ analogtv_make_font(st->dpy, st->window, &st->score_font,
4, 6, NULL );
/* If you think we haven't learned anything since the early 70s,
look at this font for a while */
- analogtv_font_set_char(&score_font, '0',
+ analogtv_font_set_char(&st->score_font, '0',
"****"
"* *"
"* *"
"* *"
"* *"
"****");
- analogtv_font_set_char(&score_font, '1',
+ analogtv_font_set_char(&st->score_font, '1',
" *"
" *"
" *"
" *"
" *"
" *");
- analogtv_font_set_char(&score_font, '2',
+ analogtv_font_set_char(&st->score_font, '2',
"****"
" *"
"****"
"* "
"* "
"****");
- analogtv_font_set_char(&score_font, '3',
+ analogtv_font_set_char(&st->score_font, '3',
"****"
" *"
"****"
" *"
" *"
"****");
- analogtv_font_set_char(&score_font, '4',
+ analogtv_font_set_char(&st->score_font, '4',
"* *"
"* *"
"****"
" *"
" *"
" *");
- analogtv_font_set_char(&score_font, '5',
+ analogtv_font_set_char(&st->score_font, '5',
"****"
"* "
"****"
" *"
" *"
"****");
- analogtv_font_set_char(&score_font, '6',
+ analogtv_font_set_char(&st->score_font, '6',
"****"
"* "
"****"
"* *"
"* *"
"****");
- analogtv_font_set_char(&score_font, '7',
+ analogtv_font_set_char(&st->score_font, '7',
"****"
" *"
" *"
" *"
" *"
" *");
- analogtv_font_set_char(&score_font, '8',
+ analogtv_font_set_char(&st->score_font, '8',
"****"
"* *"
"****"
"* *"
"* *"
"****");
- analogtv_font_set_char(&score_font, '9',
+ analogtv_font_set_char(&st->score_font, '9',
"****"
"* *"
"****"
" *"
" *");
- score_font.y_mult *= 2;
- score_font.x_mult *= 2;
+ st->score_font.y_mult *= 2;
+ st->score_font.x_mult *= 2;
#ifdef OUTPUT_POS
printf("screen(%d,%d,%d,%d)\n",0,0,PONG_W,PONG_H);
#endif
- inp=analogtv_input_allocate();
- analogtv_setup_sync(inp, 0, 0);
+ st->inp=analogtv_input_allocate();
+ analogtv_setup_sync(st->inp, 0, 0);
- reception.input = inp;
- reception.level = 2.0;
- reception.ofs=0;
+ st->reception.input = st->inp;
+ st->reception.level = 2.0;
+ st->reception.ofs=0;
#if 0
if (random()) {
- reception.multipath = frand(1.0);
+ st->reception.multipath = frand(1.0);
} else {
#endif
- reception.multipath=0.0;
+ st->reception.multipath=0.0;
#if 0
}
#endif
/*Init the paddles*/
- l_paddle.x = 8;
- l_paddle.y = 100;
- l_paddle.w = 16;
- l_paddle.h = PONG_H/4;
- l_paddle.wait = 1;
- l_paddle.lock = 0;
- r_paddle = l_paddle;
- r_paddle.x = PONG_W - 8 - r_paddle.w;
- r_paddle.wait = 0;
+ st->l_paddle.x = 8;
+ st->l_paddle.y = 100;
+ st->l_paddle.w = 16;
+ st->l_paddle.h = PONG_H/4;
+ st->l_paddle.wait = 1;
+ st->l_paddle.lock = 0;
+ st->r_paddle = st->l_paddle;
+ st->r_paddle.x = PONG_W - 8 - st->r_paddle.w;
+ st->r_paddle.wait = 0;
/*Init the ball*/
- ball.x = PONG_W/2;
- ball.y = PONG_H/2;
- ball.w = 16;
- ball.h = 8;
+ st->ball.x = PONG_W/2;
+ st->ball.y = PONG_H/2;
+ st->ball.w = 16;
+ st->ball.h = 8;
- m_unit = get_integer_resource ("speed", "Integer");
+ st->m_unit = get_integer_resource (st->dpy, "speed", "Integer");
- start_game();
+ start_game(st);
- analogtv_lcp_to_ntsc(ANALOGTV_BLACK_LEVEL, 0.0, 0.0, field_ntsc);
- analogtv_lcp_to_ntsc(100.0, 0.0, 0.0, ball_ntsc);
- analogtv_lcp_to_ntsc(100.0, 0.0, 0.0, paddle_ntsc);
- analogtv_lcp_to_ntsc(100.0, 0.0, 0.0, score_ntsc);
- analogtv_lcp_to_ntsc(100.0, 0.0, 0.0, net_ntsc);
+ analogtv_lcp_to_ntsc(ANALOGTV_BLACK_LEVEL, 0.0, 0.0, st->field_ntsc);
+ analogtv_lcp_to_ntsc(100.0, 0.0, 0.0, st->ball_ntsc);
+ analogtv_lcp_to_ntsc(100.0, 0.0, 0.0, st->paddle_ntsc);
+ analogtv_lcp_to_ntsc(100.0, 0.0, 0.0, st->score_ntsc);
+ analogtv_lcp_to_ntsc(100.0, 0.0, 0.0, st->net_ntsc);
- analogtv_draw_solid(inp,
+ analogtv_draw_solid(st->inp,
ANALOGTV_VIS_START, ANALOGTV_VIS_END,
ANALOGTV_TOP, ANALOGTV_BOT,
- field_ntsc);
+ st->field_ntsc);
+
+ return st;
}
static void
-p_logic(Paddle *p)
+p_logic(struct state *st, Paddle *p)
{
int targ;
- if (bx > 0) {
- targ = ball.y + by * (r_paddle.x-ball.x) / bx;
+ if (st->bx > 0) {
+ targ = st->ball.y + st->by * (st->r_paddle.x-st->ball.x) / st->bx;
}
- else if (bx < 0) {
- targ = ball.y - by * (ball.x - l_paddle.x - l_paddle.w) / bx;
+ else if (st->bx < 0) {
+ targ = st->ball.y - st->by * (st->ball.x - st->l_paddle.x - st->l_paddle.w) / st->bx;
}
else {
- targ = ball.y;
+ targ = st->ball.y;
}
if (targ > PONG_H) targ=PONG_H;
if (targ < 0) targ=0;
if (targ < p->y && !p->lock)
{
- p->y -= paddle_rate;
+ p->y -= st->paddle_rate;
}
else if (targ > (p->y + p->h) && !p->lock)
{
- p->y += paddle_rate;
+ p->y += st->paddle_rate;
}
else
{
int move=targ - (p->y + p->h/2);
- if (move>paddle_rate) move=paddle_rate;
- if (move<-paddle_rate) move=-paddle_rate;
+ if (move>st->paddle_rate) move=st->paddle_rate;
+ if (move<-st->paddle_rate) move=-st->paddle_rate;
p->y += move;
p->lock = 1;
}
}
*/
static void
-paint_paddle(analogtv_input *inp, Paddle *p)
+paint_paddle(struct state *st, Paddle *p)
{
- analogtv_draw_solid(inp,
+ analogtv_draw_solid(st->inp,
ANALOGTV_VIS_START + p->x, ANALOGTV_VIS_START + p->x + p->w,
ANALOGTV_TOP, ANALOGTV_BOT,
- field_ntsc);
+ st->field_ntsc);
- analogtv_draw_solid(inp,
+ analogtv_draw_solid(st->inp,
ANALOGTV_VIS_START + p->x, ANALOGTV_VIS_START + p->x + p->w,
ANALOGTV_TOP + p->y, ANALOGTV_TOP + p->y + p->h,
- paddle_ntsc);
+ st->paddle_ntsc);
}
/*
- XClearArea(dpy,window, old_ballx, old_bally, ball.d, ball.d, 0);
- XFillRectangle (dpy, window, gc, ball.x, ball.y, ball.d, ball.d);
- XFillRectangle (dpy, window, gc, xgwa.width / 2, 0, ball.d, xgwa.height);
+ XClearArea(dpy,window, old_ballx, old_bally, st->ball.d, st->ball.d, 0);
+ XFillRectangle (dpy, window, gc, st->ball.x, st->ball.y, st->ball.d, st->ball.d);
+ XFillRectangle (dpy, window, gc, xgwa.width / 2, 0, st->ball.d, xgwa.height);
*/
static void
-erase_ball(analogtv_input *inp)
+erase_ball(struct state *st)
{
- analogtv_draw_solid(inp,
- ANALOGTV_VIS_START + ball.x, ANALOGTV_VIS_START + ball.x + ball.w,
- ANALOGTV_TOP + ball.y, ANALOGTV_TOP + ball.y + ball.h,
- field_ntsc);
+ analogtv_draw_solid(st->inp,
+ ANALOGTV_VIS_START + st->ball.x, ANALOGTV_VIS_START + st->ball.x + st->ball.w,
+ ANALOGTV_TOP + st->ball.y, ANALOGTV_TOP + st->ball.y + st->ball.h,
+ st->field_ntsc);
}
static void
-paint_ball(analogtv_input *inp)
+paint_ball(struct state *st)
{
- analogtv_draw_solid(inp,
- ANALOGTV_VIS_START + ball.x, ANALOGTV_VIS_START + ball.x + ball.w,
- ANALOGTV_TOP + ball.y, ANALOGTV_TOP + ball.y + ball.h,
- ball_ntsc);
+ analogtv_draw_solid(st->inp,
+ ANALOGTV_VIS_START + st->ball.x, ANALOGTV_VIS_START + st->ball.x + st->ball.w,
+ ANALOGTV_TOP + st->ball.y, ANALOGTV_TOP + st->ball.y + st->ball.h,
+ st->ball_ntsc);
}
static void
-paint_score(analogtv_input *inp)
+paint_score(struct state *st)
{
char buf[256];
- analogtv_draw_solid(inp,
+ analogtv_draw_solid(st->inp,
ANALOGTV_VIS_START, ANALOGTV_VIS_END,
- ANALOGTV_TOP, ANALOGTV_TOP + 10+ score_font.char_h * score_font.y_mult,
- field_ntsc);
+ ANALOGTV_TOP, ANALOGTV_TOP + 10+ st->score_font.char_h * st->score_font.y_mult,
+ st->field_ntsc);
- sprintf(buf, "%d",r_paddle.score%256);
- analogtv_draw_string(inp, &score_font, buf,
+ sprintf(buf, "%d",st->r_paddle.score%256);
+ analogtv_draw_string(st->inp, &st->score_font, buf,
ANALOGTV_VIS_START + 130, ANALOGTV_TOP + 8,
- score_ntsc);
+ st->score_ntsc);
- sprintf(buf, "%d",l_paddle.score%256);
- analogtv_draw_string(inp, &score_font, buf,
+ sprintf(buf, "%d",st->l_paddle.score%256);
+ analogtv_draw_string(st->inp, &st->score_font, buf,
ANALOGTV_VIS_END - 200, ANALOGTV_TOP + 8,
- score_ntsc);
+ st->score_ntsc);
}
static void
-paint_net(analogtv_input *inp)
+paint_net(struct state *st)
{
int x,y;
x=(ANALOGTV_VIS_START + ANALOGTV_VIS_END)/2;
for (y=ANALOGTV_TOP; y<ANALOGTV_BOT; y+=6) {
- analogtv_draw_solid(inp, x-2, x+2, y, y+3,
- net_ntsc);
- analogtv_draw_solid(inp, x-2, x+2, y+3, y+6,
- field_ntsc);
+ analogtv_draw_solid(st->inp, x-2, x+2, y, y+3,
+ st->net_ntsc);
+ analogtv_draw_solid(st->inp, x-2, x+2, y+3, y+6,
+ st->field_ntsc);
}
}
-static void
-play_pong (void)
+static unsigned long
+pong_draw (Display *dpy, Window window, void *closure)
{
- erase_ball(inp);
+ struct state *st = (struct state *) closure;
+ erase_ball(st);
- ball.x += bx;
- ball.y += by;
+ st->ball.x += st->bx;
+ st->ball.y += st->by;
if ((random()%40)==0) {
- if (bx>0) bx++; else bx--;
+ if (st->bx>0) st->bx++; else st->bx--;
}
- if (!r_paddle.wait)
+ if (!st->r_paddle.wait)
{
- p_logic(&r_paddle);
+ p_logic(st, &st->r_paddle);
}
- if (!l_paddle.wait)
+ if (!st->l_paddle.wait)
{
- p_logic(&l_paddle);
+ p_logic(st, &st->l_paddle);
}
- p_hit_top_bottom(&r_paddle);
- p_hit_top_bottom(&l_paddle);
+ p_hit_top_bottom(&st->r_paddle);
+ p_hit_top_bottom(&st->l_paddle);
- hit_top_bottom();
- hit_paddle();
+ hit_top_bottom(st);
+ hit_paddle(st);
#ifdef OUTPUT_POS
- printf("(%d,%d,%d,%d)\n",ball.x,ball.y,ball.w,ball.h);
+ printf("(%d,%d,%d,%d)\n",st->ball.x,st->ball.y,st->ball.w,st->ball.h);
#endif
- paint_score(inp);
+ paint_score(st);
- paint_net(inp);
+ paint_net(st);
if (1) {
- paint_paddle(inp, &r_paddle);
- paint_paddle(inp, &l_paddle);
+ paint_paddle(st, &st->r_paddle);
+ paint_paddle(st, &st->l_paddle);
}
- if (1) paint_ball(inp);
+ if (1) paint_ball(st);
- analogtv_handle_events(tv);
+ analogtv_init_signal(st->tv, 0.04);
+ analogtv_reception_update(&st->reception);
+ analogtv_add_signal(st->tv, &st->reception);
+ analogtv_draw(st->tv);
- analogtv_init_signal(tv, 0.04);
- analogtv_reception_update(&reception);
- analogtv_add_signal(tv, &reception);
- analogtv_draw(tv);
+ return 10000;
}
\f
-char *progclass = "pong";
-char *defaults [] = {
+static const char *pong_defaults [] = {
".background: black",
".foreground: white",
"*speed: 6",
0
};
-XrmOptionDescRec options [] = {
- { "-percent", ".percent", XrmoptionSepArg, 0 },
+static XrmOptionDescRec pong_options [] = {
{ "-speed", ".speed", XrmoptionSepArg, 0 },
ANALOGTV_OPTIONS
{ 0, 0, 0, 0 }
};
-void
-screenhack (Display *dpy, Window window)
+static void
+pong_reshape (Display *dpy, Window window, void *closure,
+ unsigned int w, unsigned int h)
+{
+ struct state *st = (struct state *) closure;
+ analogtv_reconfigure (st->tv);
+}
+
+static Bool
+pong_event (Display *dpy, Window window, void *closure, XEvent *event)
{
- init_pong (dpy, window);
- while (1)
- {
- play_pong ();
- }
+ return False;
+}
+
+static void
+pong_free (Display *dpy, Window window, void *closure)
+{
+ struct state *st = (struct state *) closure;
+ analogtv_release(st->tv);
+ free (st);
}
+XSCREENSAVER_MODULE ("Pong", pong)
projects / xscreensaver / blobdiff