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author | Daniel Stenberg <daniel@haxx.se> | 2004-06-16 21:54:53 +0000 |
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committer | Daniel Stenberg <daniel@haxx.se> | 2004-06-16 21:54:53 +0000 |
commit | 3430c5d6e6afa9df107c655bc7d4094e9cc6ff75 (patch) | |
tree | 4487869b6df59b2e59e05992f300a0485c970863 | |
parent | c5800382c34f04eadaf19611a6f6693f6411061a (diff) | |
download | rockbox-3430c5d6e6afa9df107c655bc7d4094e9cc6ff75.tar.gz rockbox-3430c5d6e6afa9df107c655bc7d4094e9cc6ff75.zip |
Initial version of pong, not tested on target by me yet.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4762 a1c6a512-1295-4272-9138-f99709370657
-rw-r--r-- | apps/plugins/pong.c | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/apps/plugins/pong.c b/apps/plugins/pong.c new file mode 100644 index 0000000000..2345605995 --- /dev/null +++ b/apps/plugins/pong.c | |||
@@ -0,0 +1,313 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2004 Daniel Stenberg | ||
11 | * | ||
12 | * All files in this archive are subject to the GNU General Public License. | ||
13 | * See the file COPYING in the source tree root for full license agreement. | ||
14 | * | ||
15 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
16 | * KIND, either express or implied. | ||
17 | * | ||
18 | ****************************************************************************/ | ||
19 | #include "plugin.h" | ||
20 | |||
21 | #define PAD_HEIGHT 10 | ||
22 | #define PAD_WIDTH 2 | ||
23 | |||
24 | #define BALL_HEIGTH 2 | ||
25 | #define BALL_WIDTH 2 | ||
26 | |||
27 | #define SPEEDX 150 | ||
28 | #define SPEEDY 120 | ||
29 | |||
30 | #define RES 100 | ||
31 | |||
32 | static struct plugin_api* rb; | ||
33 | |||
34 | struct pong { | ||
35 | int ballx; /* current X*RES position of the ball */ | ||
36 | int bally; /* current Y*RES position of the ball */ | ||
37 | int w_pad[2]; /* wanted current Y positions of pads */ | ||
38 | int e_pad[2]; /* existing current Y positions of pads */ | ||
39 | int ballspeedx; /* */ | ||
40 | int ballspeedy; /* */ | ||
41 | |||
42 | int score[2]; | ||
43 | }; | ||
44 | |||
45 | void singlepad(int x, int y, int set) | ||
46 | { | ||
47 | if(set) | ||
48 | rb->lcd_fillrect(x, y, PAD_WIDTH, PAD_HEIGHT); | ||
49 | else | ||
50 | rb->lcd_clearrect(x, y, PAD_WIDTH, PAD_HEIGHT); | ||
51 | } | ||
52 | |||
53 | void pad(struct pong *p, int pad) | ||
54 | { | ||
55 | static int xpos[2]={0, 112-PAD_WIDTH}; | ||
56 | |||
57 | /* clear existing pad */ | ||
58 | singlepad(xpos[pad], p->e_pad[pad], 0); | ||
59 | |||
60 | /* draw wanted pad */ | ||
61 | singlepad(xpos[pad], p->w_pad[pad], 1); | ||
62 | |||
63 | /* existing is now the wanted */ | ||
64 | p->e_pad[pad] = p->w_pad[pad]; | ||
65 | } | ||
66 | |||
67 | bool wallcollide(struct pong *p, int pad) | ||
68 | { | ||
69 | /* we have already checked for pad-collision, just check if this hits | ||
70 | the wall */ | ||
71 | if(pad) { | ||
72 | /* right-side */ | ||
73 | if(p->ballx > 112*RES) | ||
74 | return true; | ||
75 | } | ||
76 | else { | ||
77 | if(p->ballx < 0) | ||
78 | return true; | ||
79 | } | ||
80 | return false; | ||
81 | } | ||
82 | |||
83 | /* returns true if the ball has hit a pad, and then the info variable | ||
84 | will have extra angle info */ | ||
85 | |||
86 | bool padcollide(struct pong *p, int pad, int *info) | ||
87 | { | ||
88 | int x = p->ballx/RES; | ||
89 | int y = p->bally/RES; | ||
90 | |||
91 | if((y < (p->e_pad[pad]+PAD_HEIGHT)) && | ||
92 | (y + BALL_HEIGTH > p->e_pad[pad])) { | ||
93 | /* Y seems likely right */ | ||
94 | |||
95 | /* store the delta between ball-middle MINUS pad-middle, so | ||
96 | it returns: | ||
97 | 0 when the ball hits exactly the middle of the pad | ||
98 | positive numbers when the ball is below the middle of the pad | ||
99 | negative numbers when the ball is above the middle of the pad | ||
100 | |||
101 | max number is +- PAD_HEIGHT/2 | ||
102 | */ | ||
103 | |||
104 | *info = (y+BALL_HEIGTH/2) - (p->e_pad[pad] + PAD_HEIGHT/2); | ||
105 | |||
106 | if(pad) { | ||
107 | /* right-side */ | ||
108 | if((x + BALL_WIDTH) > (112 - PAD_WIDTH)) | ||
109 | return true; /* phump */ | ||
110 | } | ||
111 | else { | ||
112 | if(x <= 0) | ||
113 | return true; | ||
114 | } | ||
115 | } | ||
116 | return false; /* nah */ | ||
117 | } | ||
118 | |||
119 | void bounce(struct pong *p, int pad, int info) | ||
120 | { | ||
121 | (void)pad; /* not used right now */ | ||
122 | p->ballspeedx = -p->ballspeedx; | ||
123 | |||
124 | /* info is the hit-angle into the pad */ | ||
125 | if(p->ballspeedy > 0) { | ||
126 | /* downwards */ | ||
127 | if(info > 0) { | ||
128 | /* below the middle of the pad */ | ||
129 | p->ballspeedy += info * RES/3; | ||
130 | } | ||
131 | else if(info < 0) { | ||
132 | /* above the middle */ | ||
133 | p->ballspeedy = info * RES/2; | ||
134 | } | ||
135 | } | ||
136 | else { | ||
137 | /* upwards */ | ||
138 | if(info > 0) { | ||
139 | /* below the middle of the pad */ | ||
140 | p->ballspeedy = info * RES/2; | ||
141 | } | ||
142 | else if(info < 0) { | ||
143 | /* above the middle */ | ||
144 | p->ballspeedy -= info * RES/3; | ||
145 | } | ||
146 | } | ||
147 | |||
148 | p->ballspeedy += rb->rand()%21-10; | ||
149 | |||
150 | #if 0 | ||
151 | fprintf(stderr, "INFO: %d YSPEED: %d\n", info, p->ballspeedy); | ||
152 | #endif | ||
153 | } | ||
154 | |||
155 | void score(struct pong *p, int pad) | ||
156 | { | ||
157 | rb->splash(HZ/4, true, "%s scores!", pad?"right":"left"); | ||
158 | rb->lcd_clear_display(); | ||
159 | p->score[pad]++; | ||
160 | |||
161 | /* then move the X-speed of the ball and give it a random Y position */ | ||
162 | p->ballspeedx = -p->ballspeedx; | ||
163 | p->bally = rb->rand()%(64-BALL_HEIGTH); | ||
164 | |||
165 | /* restore Y-speed to default */ | ||
166 | p->ballspeedy = (p->ballspeedy > 0) ? SPEEDY : -SPEEDY; | ||
167 | |||
168 | /* set the existing pad positions to something weird to force pad | ||
169 | updates */ | ||
170 | p->e_pad[0] = -1; | ||
171 | p->e_pad[1] = -1; | ||
172 | } | ||
173 | |||
174 | void ball(struct pong *p) | ||
175 | { | ||
176 | int x = p->ballx/RES; | ||
177 | int y = p->bally/RES; | ||
178 | |||
179 | int newx; | ||
180 | int newy; | ||
181 | |||
182 | int info; | ||
183 | |||
184 | /* movement */ | ||
185 | p->ballx += p->ballspeedx; | ||
186 | p->bally += p->ballspeedy; | ||
187 | |||
188 | newx = p->ballx/RES; | ||
189 | newy = p->bally/RES; | ||
190 | |||
191 | /* detect if ball hits a wall */ | ||
192 | if(newy + BALL_HEIGTH > 64) { | ||
193 | /* hit floor, bounce */ | ||
194 | p->ballspeedy = -p->ballspeedy; | ||
195 | newy = 64 - BALL_HEIGTH; | ||
196 | p->bally = newy * RES; | ||
197 | } | ||
198 | else if(newy < 0) { | ||
199 | /* hit ceiling, bounce */ | ||
200 | p->ballspeedy = -p->ballspeedy; | ||
201 | p->bally = 0; | ||
202 | newy = 0; | ||
203 | } | ||
204 | |||
205 | /* detect if ball hit pads */ | ||
206 | if(padcollide(p, 0, &info)) | ||
207 | bounce(p, 0, info); | ||
208 | else if(padcollide(p, 1, &info)) | ||
209 | bounce(p, 1, info); | ||
210 | else if(wallcollide(p, 0)) | ||
211 | score(p, 1); | ||
212 | else if(wallcollide(p, 1)) | ||
213 | score(p, 0); | ||
214 | |||
215 | /* clear old position */ | ||
216 | rb->lcd_clearrect(x, y, BALL_WIDTH, BALL_HEIGTH); | ||
217 | |||
218 | /* draw the new ball position */ | ||
219 | rb->lcd_fillrect(newx, newy, BALL_WIDTH, BALL_HEIGTH); | ||
220 | } | ||
221 | |||
222 | void padmove(int *pos, int dir) | ||
223 | { | ||
224 | *pos += dir; | ||
225 | if(*pos > (64-PAD_HEIGHT)) | ||
226 | *pos = (64-PAD_HEIGHT); | ||
227 | else if(*pos < 0) | ||
228 | *pos = 0; | ||
229 | } | ||
230 | |||
231 | bool keys(struct pong *p) | ||
232 | { | ||
233 | int key; | ||
234 | |||
235 | int time = 4; /* number of ticks this function will loop reading keys */ | ||
236 | int start = *rb->current_tick; | ||
237 | int end = start + time; | ||
238 | |||
239 | while(end > *rb->current_tick) { | ||
240 | key = rb->button_get_w_tmo(end - *rb->current_tick); | ||
241 | |||
242 | if(key & BUTTON_OFF) | ||
243 | return false; /* exit game NOW */ | ||
244 | |||
245 | if(key & BUTTON_LEFT) /* player left goes down */ | ||
246 | padmove(&p->w_pad[0], 1); | ||
247 | |||
248 | if(key & BUTTON_F1) /* player left goes up */ | ||
249 | padmove(&p->w_pad[0], -1); | ||
250 | |||
251 | if(key & BUTTON_RIGHT) /* player right goes down */ | ||
252 | padmove(&p->w_pad[1], 1); | ||
253 | |||
254 | if(key & BUTTON_F3) /* player right goes up */ | ||
255 | padmove(&p->w_pad[1], -1); | ||
256 | } | ||
257 | return true; /* return false to exit game */ | ||
258 | } | ||
259 | |||
260 | void showscore(struct pong *p) | ||
261 | { | ||
262 | static char buffer[20]; | ||
263 | |||
264 | snprintf(buffer, 20, "%d - %d", p->score[0], p->score[1]); | ||
265 | rb->lcd_puts(4, 0, buffer); | ||
266 | } | ||
267 | |||
268 | /* this is the plugin entry point */ | ||
269 | enum plugin_status plugin_start(struct plugin_api* api, void* parameter) | ||
270 | { | ||
271 | TEST_PLUGIN_API(api); | ||
272 | |||
273 | struct pong pong; | ||
274 | bool game = true; | ||
275 | |||
276 | /* init the struct with some silly values to start with */ | ||
277 | |||
278 | pong.ballx = 20*RES; | ||
279 | pong.bally = 20*RES; | ||
280 | |||
281 | pong.e_pad[0] = 0; | ||
282 | pong.w_pad[0] = 7; | ||
283 | pong.e_pad[1] = 0; | ||
284 | pong.w_pad[1] = 40; | ||
285 | |||
286 | pong.ballspeedx = SPEEDX; | ||
287 | pong.ballspeedy = SPEEDY; | ||
288 | |||
289 | pong.score[0] = pong.score[1] = 0; /* lets start at 0 - 0 ;-) */ | ||
290 | |||
291 | /* if you don't use the parameter, you can do like | ||
292 | this to avoid the compiler warning about it */ | ||
293 | (void)parameter; | ||
294 | |||
295 | rb = api; /* use the "standard" rb pointer */ | ||
296 | |||
297 | /* Clear screen */ | ||
298 | rb->lcd_clear_display(); | ||
299 | |||
300 | /* go go go */ | ||
301 | while(game) { | ||
302 | showscore(&pong); | ||
303 | pad(&pong, 0); /* draw left pad */ | ||
304 | pad(&pong, 1); /* draw right pad */ | ||
305 | ball(&pong); /* move and draw ball */ | ||
306 | |||
307 | rb->lcd_update(); | ||
308 | |||
309 | game = keys(&pong); /* deal with keys */ | ||
310 | } | ||
311 | |||
312 | return PLUGIN_OK; | ||
313 | } | ||