game.c

   1
   2 /**
   3  *
   4  * Tennix! SDL Port
   5  * Copyright (C) 2003, 2007, 2008, 2009 Thomas Perl <thp@thpinfo.com>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version 2
  10  * of the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  20  * MA  02110-1301, USA.
  21  *
  22  **/
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <assert.h>
  28 #include <unistd.h>
  29
  30 #include "tennix.h"
  31 #include "game.h"
  32 #include "graphics.h"
  33 #include "input.h"
  34 #include "sound.h"
  35 #include "util.h"
  36 #include "network.h"
  37
  38
  39 GameState *gamestate_new() {
  40     GameState *s;
  41
  42     GameState template = {
  43         NULL,
  44         -1,
  45         { 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, false, -1, false },
  46         {
  47             { NULL, -1, GAME_X_MIN-RACKET_X_MID*2, GAME_Y_MID, 0.0, true, 0, DESIRE_NORMAL, PLAYER_TYPE_AI, 0, {0}, PLAYER_ACCEL_DEFAULT },
  48             { NULL, -1, GAME_X_MAX+RACKET_X_MID*2, GAME_Y_MID, 0.0, true, 0, DESIRE_NORMAL, PLAYER_TYPE_AI, 0, {0}, PLAYER_ACCEL_DEFAULT },
  49         },
  50         1,
  51         REFEREE_NORMAL,
  52         0,
  53         WINNER_NONE,
  54         SOUND_EVENT_NONE, /* sound events */
  55         SCORE_UNDECIDED,
  56         0,
  57         EVENTCOUNTER_GAMESTATE_START,
  58         EVENTCOUNTER_GAMESTATE_START,
  59         STATUSMSG_WELCOME,
  60     };
  61
  62     s = (GameState*)malloc(sizeof(GameState));
  63     if (s == NULL) abort();
  64
  65     memcpy(s, &template, sizeof(GameState));
  66
  67     game_setup_serve(s);
  68
  69     return s;
  70 }
  71
  72
  73 int gamestate_save(GameState* s, const char* filename)
  74 {
  75     const Location *location;
  76     InputDevice* input_devices[MAXPLAYERS];
  77     int i, result = 0;
  78     FILE* fp = NULL;
  79 #ifndef WIN32
  80     char tmp[MAXPATHLEN];
  81
  82     assert(getcwd(tmp, MAXPATHLEN) == tmp);
  83     assert(chdir(getenv("HOME")) == 0);
  84 #endif
  85
  86     /**
  87      * Process-specific data (pointers to data
  88      * structures only of interest to this process)
  89      * has to be "removed" before saving.
  90      *
  91      * It can later be restored (in gamestate_load).
  92      **/
  93
  94     fp = fopen(filename, "w");
  95     if (fp == NULL) {
  96         return -1;
  97     }
  98
  99     /* Save data for later recovery + clear */
 100     location = s->location;
 101     s->location = NULL;
 102     for (i=1; i<=MAXPLAYERS; i++) {
 103         input_devices[i-1] = PLAYER(s, i).input;
 104         PLAYER(s, i).input = NULL;
 105     }
 106
 107     if (fwrite(s, sizeof(GameState), 1, fp) != 1) {
 108         result = -2;
 109     }
 110
 111     /* Restore process-specific data */
 112     s->location = location;
 113     for (i=1; i<=MAXPLAYERS; i++) {
 114         PLAYER(s, i).input = input_devices[i-1];
 115     }
 116
 117     fclose(fp);
 118
 119 #ifndef WIN32
 120     assert(chdir(tmp) == 0);
 121 #endif
 122
 123     return result;
 124 }
 125
 126
 127 GameState* gamestate_load(const char* filename)
 128 {
 129     FILE* fp;
 130     GameState* s = NULL;
 131 #ifndef WIN32
 132     char tmp[MAXPATHLEN];
 133
 134     assert(getcwd(tmp, MAXPATHLEN) == tmp);
 135     assert(chdir(getenv("HOME")) == 0);
 136 #endif
 137
 138     fp = fopen(filename, "r");
 139
 140     if (fp != NULL) {
 141         s = (GameState*)malloc(sizeof(GameState));
 142         if (s != NULL) {
 143             if (fread(s, sizeof(GameState), 1, fp) == 1) {
 144                 /* Restore/create process-specific data */
 145                 /* FIXME: s->location, players' "input" */
 146             } else {
 147                 free(s);
 148                 s = NULL;
 149             }
 150         }
 151         fclose(fp);
 152     }
 153
 154 #ifndef WIN32
 155     assert(chdir(tmp) == 0);
 156 #endif
 157
 158     return s;
 159 }
 160
 161
 162 void gameloop(GameState *s, TennixNet* c) {
 163     Uint32 ot = SDL_GetTicks();
 164     Uint32 nt;
 165     Uint32 dt = GAME_TICKS;
 166     Uint32 diff;
 167     Uint32 accumulator = 0;
 168     bool quit = false;
 169     int p;
 170     int i=0;
 171     RenderState r = {
 172         SOUND_EVENT_NONE,
 173         REFEREE_COUNT,
 174         EVENTCOUNTER_RENDERSTATE_START,
 175         EVENTCOUNTER_RENDERSTATE_START,
 176         STATUSMSG_NONE,
 177         NULL,
 178         NULL,
 179         NULL,
 180     };
 181
 182     assert(c != NULL);
 183
 184     /* Catch-up with existing sound events */
 185     r.sound_events = s->sound_events;
 186
 187 #ifdef ENABLE_FPS_LIMIT
 188     Uint32 ft, frames; /* frame timer and frames */
 189 #endif
 190
 191     if (s->location->rain > 0) {
 192         play_sample_background(SOUND_RAIN);
 193     }
 194     if (s->location->max_visitors > 100) {
 195         play_sample_loop(SOUND_AUDIENCE);
 196     }
 197
 198     for (p=1; p<=MAXPLAYERS; p++) {
 199         input_device_join_game(PLAYER(s, p).input, s, p);
 200     }
 201
 202 #ifdef ENABLE_FPS_LIMIT
 203     frames = 0;
 204     ft = SDL_GetTicks();
 205 #endif
 206     while( !quit) {
 207         nt = SDL_GetTicks();
 208         diff = nt-ot;
 209         if( diff > 2000) {
 210             diff = 0;
 211         }
 212
 213         accumulator += diff;
 214         ot = nt;
 215
 216         while( accumulator >= dt) {
 217             step(s);
 218
 219             network_receive(c);
 220             network_get_gamestate(c, s);
 221
 222             if ((i++) % 10 == 0) {
 223                 network_send_state(c, s);
 224             }
 225
 226             quit = handle_input(s, c);
 227             accumulator -= dt;
 228         }
 229
 230 #ifdef ENABLE_FPS_LIMIT
 231         while (frames*1000.0/((float)(SDL_GetTicks()-ft+1))>(float)(DEFAULT_FPS)) {
 232             SDL_Delay(10);
 233         }
 234         frames++;
 235 #endif
 236
 237         render(s, &r);
 238     }
 239
 240     for (p=1; p<=MAXPLAYERS; p++) {
 241         input_device_part_game(PLAYER(s, p).input);
 242     }
 243
 244     clear_screen();
 245     rectangle(0, 0, WIDTH, HEIGHT, 80, 80, 80);
 246     store_screen();
 247
 248     stop_sample(SOUND_AUDIENCE);
 249     stop_sample(SOUND_RAIN);
 250 }
 251
 252 void step(GameState* s) {
 253     bool ground_event = false;
 254     int p;
 255
 256     s->ball.z += s->ball.move_z;
 257     if (!s->ball.inhibit_gravity) {
 258         s->ball.move_z += GRAVITY;
 259     }
 260
 261     s->ball.x += s->ball.move_x;
 262     s->ball.y += s->ball.move_y;
 263
 264     for (p=1; p<=MAXPLAYERS; p++) {
 265         if (PLAYER(s, p).use_power) {
 266             PLAYER(s, p).power = fmaxf(0.0, fminf(
 267                         PLAYER(s, p).power*POWER_DOWN_FACTOR,
 268                         PLAYER_POWER_MAX));
 269         }
 270     }
 271
 272     if (s->ball.z < 0) {
 273         /* ground event */
 274         ground_event = true;
 275
 276         s->referee = REFEREE_NORMAL;
 277
 278         /* bounce from the ground */
 279         if (fabsf(s->ball.move_z) > 0.3) {
 280             s->sound_events ^= SOUND_EVENT_GROUND;
 281             s->ball.move_z *= -BALL_RESTITUTION;
 282         } else {
 283             s->ball.move_z = 0;
 284         }
 285         s->ball.z = 0;
 286     }
 287
 288     if (NET_COLLISION_BALL(s->ball)) {
 289         /* the net blocks movement of the ball */
 290         while (NET_COLLISION_BALL(s->ball)) {
 291             /* make sure the ball appears OUTSIDE of the net */
 292             if (s->ball.move_x < 0) {
 293                 s->ball.x += 1;
 294             } else {
 295                 s->ball.x -= 1;
 296             }
 297         }
 298         s->ball.move_x = 0;
 299         s->ball.move_y = 0;
 300     }
 301
 302     /* see if we have something to score */
 303     if (s->score_event == SCORE_UNDECIDED) {
 304         if (NET_COLLISION_BALL(s->ball)) {
 305             /* the ball "fell" into the net  */
 306             s->score_event = SCORE_EVENT_NET;
 307             s->sound_events ^= SOUND_EVENT_OUT;
 308             s->status_message = STATUSMSG_NET;
 309         } else if (IS_OFFSCREEN(s->ball.x, s->ball.y)) {
 310             /* ball flew offscreen */
 311             s->score_event = SCORE_EVENT_OFFSCREEN;
 312             s->sound_events ^= SOUND_EVENT_OUT;
 313             s->status_message = STATUSMSG_OUT;
 314         } else if (ground_event) {
 315             /* the ball hit the ground on the screen */
 316             if (IS_OUT(s->ball.x, s->ball.y)) {
 317                 /* the ball bounced in the OUT area */
 318                 s->score_event = SCORE_EVENT_OUT;
 319                 s->sound_events ^= SOUND_EVENT_OUT;
 320                 s->status_message = STATUSMSG_OUT;
 321             } else if (GROUND_IS_VALID(s->ball.last_hit_by, s->ball.x, s->ball.y)) {
 322                 if (s->ball.ground_hit) {
 323                     s->score_event = SCORE_EVENT_GROUND_VALID;
 324                     s->sound_events ^= SOUND_EVENT_OUT;
 325                     s->status_message = STATUSMSG_DIDNTCATCH;
 326                 } else {
 327                     /* first ground hit in valid area */
 328                     s->ball.ground_hit = true;
 329                 }
 330             } else {
 331                 /* ball hit somewhere invalid */
 332                 s->score_event = SCORE_EVENT_GROUND_INVALID;
 333                 s->sound_events ^= SOUND_EVENT_OUT;
 334                 s->status_message = STATUSMSG_FAULT;
 335             }
 336         }
 337     }
 338
 339     if (s->score_event != SCORE_UNDECIDED) {
 340         /* we have some scoring to do */
 341         if (s->score_time < SCORING_DELAY/GAME_TICKS) {
 342             /* schedule scoring in the future */
 343             s->score_time++;
 344             s->referee = REFEREE_OUT;
 345         } else if (s->score_time >= SCORING_DELAY/GAME_TICKS) {
 346             /* time has ran out - score now */
 347             switch (score_game(s)) {
 348                 case WINNER_PLAYER1:
 349                     s->status_message = STATUSMSG_P1SCORES;
 350                     s->referee = REFEREE_PLAYER1;
 351                     break;
 352                 case WINNER_PLAYER2:
 353                     s->status_message = STATUSMSG_P2SCORES;
 354                     s->referee = REFEREE_PLAYER2;
 355                     break;
 356                 default:
 357                     assert(0);
 358                     break;
 359             }
 360             s->score_time = 0;
 361
 362             game_setup_serve(s);
 363             if (s->location->max_visitors > 100) {
 364                 s->sound_events ^= SOUND_EVENT_APPLAUSE;
 365             }
 366         }
 367     } else {
 368         /* score is still undecided - do the racket swing thing */
 369         for (p=1; p<=2; p++) {
 370             if (IS_NEAR_X(PLAYER(s, p).x, s->ball.x) && IS_NEAR_Y(PLAYER(s, p).y, s->ball.y-s->ball.z) && PLAYER(s, p).use_power && PLAYER(s, p).power > 30.0 && s->ball.last_hit_by != p) {
 371                 /* RACKET HIT */
 372                 if (!s->ball.ground_hit && s->ball.move_x != 0.0) {
 373                     s->status_message = STATUSMSG_VOLLEY;
 374                 } else {
 375                     s->status_message = STATUSMSG_DEFAULT;
 376                 }
 377                 switch (PLAYER(s, p).desire) {
 378                     case DESIRE_NORMAL:
 379                         /* normal swing */
 380                         s->ball.move_x = 2.7 + 2.0*PLAYER(s, p).power/PLAYER_POWER_MAX;
 381                         s->ball.move_z = 1.2*PLAYER(s, p).power/PLAYER_POWER_MAX;
 382                         break;
 383                     case DESIRE_TOPSPIN:
 384                         /* top spin */
 385                         s->ball.move_x = 1.1 + 2.2*PLAYER(s, p).power/PLAYER_POWER_MAX;
 386                         s->ball.move_z = 2.5*PLAYER(s, p).power/PLAYER_POWER_MAX;
 387                         break;
 388                     case DESIRE_SMASH:
 389                         /* smash */
 390                         s->ball.move_x = 4.0 + 3.0*PLAYER(s, p).power/PLAYER_POWER_MAX;
 391                         s->ball.move_z = 1.1*PLAYER(s, p).power/PLAYER_POWER_MAX;
 392                         break;
 393                 }
 394                 s->ball.move_y = get_move_y( s, p);
 395                 s->sound_events ^= SOUND_EVENT_RACKET;
 396                 s->ball.ground_hit = false;
 397                 s->ball.inhibit_gravity = false;
 398                 s->ball.last_hit_by = p;
 399                 if (p==2) {
 400                     s->ball.move_x *= -1;
 401                 }
 402             }
 403         }
 404     }
 405 }
 406
 407 bool handle_input(GameState* s, TennixNet* c) {
 408     static NetworkGameState tmp;
 409     static NetworkInputData net_input;
 410     Uint8* keys = NULL;
 411     int p;
 412
 413     SDL_PumpEvents();
 414     keys = SDL_GetKeyState(NULL);
 415
 416     if (keys['1']) {
 417         net_serialize_gamestate(s, &tmp);
 418     } else if (keys['2']) {
 419         net_unserialize_gamestate(&tmp, s);
 420     }
 421
 422     network_get_input(c, &net_input);
 423     if (s->winner == WINNER_NONE) {
 424         for (p=1; p<=MAXPLAYERS; p++) {
 425             if( PLAYER(s, p).type == PLAYER_TYPE_HUMAN) {
 426                 if (PLAYER(s, p).input->type == INPUT_TYPE_NETWORK) {
 427                     memcpy(&(PLAYER(s, p).input->net), &net_input,
 428                             sizeof(NetworkInputData));
 429                 }
 430                 input_human(s, p);
 431                 if (PLAYER(s, p).input->type != INPUT_TYPE_NETWORK) {
 432                     network_send_input(c, &(PLAYER(s, p).input->net));
 433                 }
 434             } else {
 435                 input_ai(s, p);
 436             }
 437
 438             /* Make sure player coordinates are valid */
 439             if (PLAYER(s, p).y < PLAYER_Y_MIN) {
 440                 PLAYER(s, p).y = PLAYER_Y_MIN;
 441             } else if (PLAYER(s, p).y > PLAYER_Y_MAX) {
 442                 PLAYER(s, p).y = PLAYER_Y_MAX;
 443             }
 444         }
 445     }
 446
 447     /* Maemo: The "F4" button is the "Open menu" button */
 448     return (keys[SDLK_ESCAPE] || keys['q']);
 449 }
 450
 451 void render(const GameState* s, RenderState* r) {
 452     int x, y, b;
 453     unsigned int i;
 454     float zoom;
 455     float rotate;
 456     int t=1000;
 457     soundevent_t sounds;
 458     Uint32 time = SDL_GetTicks();
 459
 460     /* The bits in sound_events flip when the sound should play */
 461     if ((sounds = (r->sound_events ^ s->sound_events)) != 0) {
 462         if (sounds & SOUND_EVENT_GROUND) {
 463             sample_volume_group(SOUND_GROUND_FIRST, SOUND_GROUND_LAST,
 464                     fmaxf(0.0, fminf(1.0, fabsf(s->ball.move_z)/2)));
 465             pan_sample_group(SOUND_GROUND_FIRST, SOUND_GROUND_LAST,
 466                     fmaxf(0.0, fminf(1.0, (s->ball.x)/WIDTH)));
 467             play_sample(SOUND_GROUND);
 468         }
 469         if (sounds & SOUND_EVENT_OUT) {
 470             play_sample(SOUND_OUT);
 471         }
 472         if (sounds & SOUND_EVENT_APPLAUSE) {
 473             play_sample(SOUND_APPLAUSE);
 474         }
 475         if (sounds & SOUND_EVENT_RACKET) {
 476             if (((s->ball.x)/WIDTH) < 0.5) {
 477                 pan_sample_group(SOUND_RACKET_FIRST, SOUND_RACKET_LAST, 0.3);
 478             } else {
 479                 pan_sample_group(SOUND_RACKET_FIRST, SOUND_RACKET_LAST, 0.7);
 480             }
 481             play_sample(SOUND_RACKET);
 482         }
 483         r->sound_events = s->sound_events;
 484     }
 485
 486     if( s->winner != WINNER_NONE) {
 487         clear_screen();
 488         rectangle(0, 0, WIDTH, HEIGHT, 80, 80, 80);
 489         store_screen();
 490         show_sprite( GR_RACKET, 2*(s->winner-1), 4, WIDTH/2 - get_image_width( GR_RACKET)/8, HEIGHT/2 - get_image_height( GR_RACKET), 255);
 491         /*sprintf( s->game_score_str, "player %d wins the match with %s", s->winner, format_sets( s));
 492         font_draw_string(FONT_LARGE, s->game_score_str, (WIDTH-font_get_string_width(FONT_LARGE, s->game_score_str))/2, HEIGHT/2 + 30);*/
 493         updatescr();
 494         return;
 495     }
 496     if ((r->referee != s->referee) ||
 497             (r->ec_game != s->ec_game) ||
 498             (r->ec_sets != s->ec_sets) ||
 499             (r->status_message != s->status_message)) {
 500         /* Update status message text */
 501         if (r->status_message != s->status_message) {
 502             r->text_status = format_status(s);
 503             r->status_message = s->status_message;
 504         }
 505         /* Update game status text */
 506         if (r->ec_game != s->ec_game) {
 507             r->text_game = format_game(s);
 508             r->ec_game = s->ec_game;
 509         }
 510         /* Update set status text */
 511         if (r->ec_sets != s->ec_sets) {
 512             r->text_sets = format_sets(s);
 513             if (r->status_message == STATUSMSG_DEFAULT) {
 514                 r->text_status = format_status(s);
 515             }
 516             r->ec_sets = s->ec_sets;
 517         }
 518         clear_screen();
 519         rectangle(0, 0, WIDTH, HEIGHT, 80, 80, 80);
 520         fill_image(s->location->court_type, 120, 120, 400, 250);
 521         show_image(GR_COURT, 0, 0, 255);
 522         font_draw_string(FONT_XLARGE, r->text_game, 14, 14);
 523         font_draw_string(FONT_XLARGE, r->text_sets,
 524                 (WIDTH-font_get_string_width(FONT_XLARGE, r->text_sets))-14, 14);
 525         if (s->location->has_referee) {
 526             switch (s->referee) {
 527                 case REFEREE_NORMAL:
 528                     t = 1000;
 529                     break;
 530                 case REFEREE_OUT:
 531                     t = 200;
 532                     break;
 533                 case REFEREE_PLAYER1:
 534                 case REFEREE_PLAYER2:
 535                     t = 400;
 536                     break;
 537             }
 538             t = (time/t)%4;
 539             switch (t) {
 540                 case 0:
 541                     t=0;
 542                     break;
 543                 case 1:
 544                     t=1;
 545                     break;
 546                 case 2:
 547                     t=0;
 548                     break;
 549                 case 3:
 550                     t=2;
 551                     break;
 552             }
 553             show_sprite( GR_REFEREE, s->referee*3+t, 12, 250, 10, 255);
 554             if (voice_finished_flag == 0) {
 555                 show_sprite(GR_TALK, (time/150)%2, 2, 280, 45, 255);
 556             }
 557         }
 558         r->referee = s->referee;
 559         store_screen();
 560     }
 561
 562    /* show_sprite( GR_RACKET, (!PLAYER(s, 1).state), 4, PLAYER(s, 1).x-RACKET_X_MID, PLAYER(s, 1).y-RACKET_Y_MID, 255);
 563     show_sprite( GR_RACKET, (!PLAYER(s, 2).state)+2, 4, PLAYER(s, 2).x-RACKET_X_MID, PLAYER(s, 2).y-RACKET_Y_MID, 255);*/
 564     show_sprite( GR_RACKET, !PLAYER(s, 1).use_power, 4, PLAYER(s, 1).x-RACKET_X_MID, PLAYER(s, 1).y-RACKET_Y_MID, 255);
 565     show_sprite( GR_RACKET, !PLAYER(s, 2).use_power + 2, 4, PLAYER(s, 2).x-RACKET_X_MID, PLAYER(s, 2).y-RACKET_Y_MID, 255);
 566
 567     rectangle(10, HEIGHT-30, PLAYER_POWER_MAX, 10, 50, 50, 50);
 568     rectangle(WIDTH-PLAYER_POWER_MAX-10, HEIGHT-30, PLAYER_POWER_MAX, 10, 50, 50, 50);
 569
 570     rectangle(10, HEIGHT-30, (int)(PLAYER(s, 1).power), 10, 200, 200, 200);
 571     rectangle(WIDTH-PLAYER_POWER_MAX-10, HEIGHT-30, (int)(PLAYER(s, 2).power), 10, 200, 200, 200);
 572
 573     if( s->ball.move_x > 0) {
 574         b = (time/100)%BALL_STATES;
 575     } else if( s->ball.move_x < 0) {
 576         b = BALL_STATES-1-(time/100)%BALL_STATES;
 577     } else {
 578         b = 0;
 579     }
 580
 581     rotate = 0.0;
 582     zoom = fmaxf(0.5, fminf(1.0, (float)(30.-(s->ball.z))/10.));
 583     show_image_rotozoom(GR_SHADOW, s->ball.x, s->ball.y+3, rotate, zoom);
 584
 585     rotate = (-s->ball.move_x * (float)((float)time/10.));
 586     zoom = 1.0 + fmaxf(0.0, (s->ball.z-10.)/100.);
 587     show_image_rotozoom(GR_BALL, s->ball.x, s->ball.y - s->ball.z, rotate, zoom);
 588
 589     /* Player 1's mouse rectangle */
 590     if (PLAYER(s, 1).input != NULL && PLAYER(s, 1).input->type == INPUT_TYPE_MOUSE) {
 591         rectangle(PLAYER(s, 1).x-2+5, PLAYER(s, 1).input->my-2, 4, 4, 255, 255, 255);
 592         rectangle(PLAYER(s, 1).x-1+5, PLAYER(s, 1).input->my-1, 2, 2, 0, 0, 0);
 593     }
 594
 595     /* Player 2's mouse rectangle */
 596     if (PLAYER(s, 2).input != NULL && PLAYER(s, 2).input->type == INPUT_TYPE_MOUSE) {
 597         rectangle(PLAYER(s, 2).x-2+5, PLAYER(s, 2).input->my-2, 4, 4, 255, 255, 255);
 598         rectangle(PLAYER(s, 2).x-1+5, PLAYER(s, 2).input->my-1, 2, 2, 0, 0, 0);
 599     }
 600
 601     font_draw_string(FONT_MEDIUM, r->text_status,
 602             (WIDTH-font_get_string_width(FONT_MEDIUM, r->text_status))/2, HEIGHT-50);
 603
 604     for (i=0; i<s->location->rain; i++) {
 605         x = rand()%WIDTH;
 606         y = rand()%HEIGHT;
 607         draw_line_faded(x, y, x+10, y+30, 0, 0, 255, 100, 200, 255);
 608     }
 609     if (s->location->rain) {
 610         /**
 611          * Cheap-ish update of the whole screen. This can
 612          * probably be optimized.
 613          **/
 614         update_rect(0, 0, WIDTH, HEIGHT);
 615     }
 616
 617 #ifdef DEBUG
 618     line_horiz( PLAYER(s, 1).y, 255, 0, 0);
 619     line_horiz( PLAYER(s, 2).y, 0, 0, 255);
 620     line_horiz( s->ball.y, 0, 255, 0);
 621
 622     line_vert( PLAYER(s, 1).x, 255, 0, 0);
 623     line_vert( PLAYER(s, 2).x, 0, 0, 255);
 624     line_vert( s->ball.x, 0, 255, 0);
 625
 626     line_horiz( GAME_Y_MIN, 100, 100, 100);
 627     line_horiz( GAME_Y_MAX, 100, 100, 100);
 628 #endif
 629     switch (s->location->fog) {
 630         default:
 631         case 4:
 632             fill_image_offset(GR_FOG2, 0, 0, WIDTH, HEIGHT, -time/150, 0);
 633         case 3:
 634             fill_image_offset(GR_FOG, 0, 0, WIDTH, HEIGHT, -time/100, 20);
 635         case 2:
 636             fill_image_offset(GR_FOG2, 0, 0, WIDTH, HEIGHT, -time/180, 80);
 637         case 1:
 638             fill_image_offset(GR_FOG, 0, 0, WIDTH, HEIGHT, time/200, 0);
 639         case 0:
 640             break;
 641     }
 642     if (s->location->night) {
 643         show_image(GR_NIGHT, 0, 0, 255);
 644     }
 645
 646     updatescr();
 647 }
 648
 649 float get_move_y( GameState* s, unsigned char player) {
 650     float pct, dest, x_len, y_len;
 651     float py, by, pa, move_x;
 652
 653     py = (player==1)?(PLAYER(s, 1).y):(PLAYER(s, 2).y);
 654     by = s->ball.y - s->ball.z;
 655     pa = RACKET_Y_MID*2;
 656     move_x = s->ball.move_x;
 657
 658     /* -1.0 .. 1.0 for racket hit position */
 659     pct = fmaxf(-1.0, fminf(1.0, (by-py)/(pa/2)));
 660
 661     /* Y destination for ball */
 662     dest = GAME_Y_MID + pct*(GAME_Y_MAX-GAME_Y_MIN);
 663
 664     /* lengths for the ball's journey */
 665     if( player == 1) {
 666         x_len = GAME_X_MAX - s->ball.x;
 667     } else {
 668         x_len = s->ball.x - GAME_X_MIN;
 669     }
 670     y_len = dest - by;
 671
 672     /* return the should-be value for move_y */
 673     return (y_len*move_x)/(x_len);
 674 }
 675
 676 void input_human(GameState* s, int player) {
 677     bool hit, topspin, smash;
 678     float move_y;
 679
 680     /* For mouse input, hand the player coordinates to the InputDevice */
 681     if (PLAYER(s, player).input->type == INPUT_TYPE_MOUSE) {
 682         PLAYER(s, player).input->player_x = (int)(PLAYER(s, player).x);
 683         PLAYER(s, player).input->player_y = (int)(PLAYER(s, player).y);
 684     }
 685
 686     move_y = PLAYER_MOVE_Y*input_device_get_axis(PLAYER(s, player).input, INPUT_AXIS_Y);
 687
 688     hit = input_device_get_key(PLAYER(s, player).input, INPUT_KEY_HIT);
 689     topspin = input_device_get_key(PLAYER(s, player).input, INPUT_KEY_TOPSPIN);
 690     smash = input_device_get_key(PLAYER(s, player).input, INPUT_KEY_SMASH);
 691
 692     if (move_y != 0) {
 693         if (fabsf(move_y) > fabsf(move_y*PLAYER(s, player).accelerate)) {
 694             move_y *= PLAYER(s, player).accelerate;
 695         }
 696         PLAYER(s, player).y += move_y;
 697         PLAYER(s, player).accelerate *= PLAYER_ACCEL_INCREASE;
 698         if (PLAYER(s, player).accelerate > 190) {
 699             PLAYER(s, player).accelerate = 190;
 700         }
 701     } else {
 702         PLAYER(s, player).accelerate = PLAYER_ACCEL_DEFAULT;
 703     }
 704
 705     if(hit || topspin || smash) {
 706         PLAYER(s, player).desire = (topspin)?(DESIRE_TOPSPIN):(DESIRE_NORMAL);
 707         PLAYER(s, player).desire = (smash)?(DESIRE_SMASH):(PLAYER(s, player).desire);
 708
 709         PLAYER(s, player).power = fmaxf(10.0, fminf(PLAYER(s, player).power*POWER_UP_FACTOR, PLAYER_POWER_MAX));
 710         PLAYER(s, player).use_power = false;
 711     } else {
 712         PLAYER(s, player).use_power = true;
 713     }
 714 }
 715
 716 void input_ai(GameState* s, int player) {
 717     float fact = 1.7;
 718     int ball_approaching = 0;
 719
 720     if ((PLAYER(s, player).x < GAME_X_MID && s->ball.move_x <= 0) ||
 721         (PLAYER(s, player).x > GAME_X_MID && s->ball.move_x >= 0)) {
 722         ball_approaching = 1;
 723     }
 724
 725     /* FIXME - this is broken since the new physics model has been introduced */
 726
 727     if (fabsf(PLAYER(s, player).y - (s->ball.y-s->ball.z)) > RACKET_Y_MID*5) {
 728         fact = 3.5;
 729     }
 730
 731     if(1) {
 732         if( PLAYER(s, player).desire == DESIRE_NORMAL && !IS_NEAR_Y_AI(PLAYER(s, player).y, (s->ball.y-s->ball.z)) && ball_approaching) {
 733             if( PLAYER(s, player).y < (s->ball.y-s->ball.z)) {
 734                 PLAYER(s, player).y += fminf(2*fact, (s->ball.y-s->ball.z) - PLAYER(s, player).y);
 735             } else if( PLAYER(s, player).y > (s->ball.y-s->ball.z)) {
 736                 PLAYER(s, player).y -= fminf(2*fact, PLAYER(s, player).y - (s->ball.y-s->ball.z));
 737             }
 738         }
 739
 740         if (IS_NEAR_Y(PLAYER(s, player).y, (s->ball.y-s->ball.z)) && IS_NEAR_X_AI(PLAYER(s, player).x, s->ball.x) && PLAYER(s, player).power > 90.) {
 741             PLAYER(s, player).use_power = true;
 742         } else if (ball_approaching) {
 743             PLAYER(s, player).power = fmaxf(10., fminf(PLAYER(s, player).power*POWER_UP_FACTOR, PLAYER_POWER_MAX));
 744             PLAYER(s, player).use_power = false;
 745         }
 746     }
 747 }
 748
 749 void game_setup_serve( GameState* s) {
 750     s->ball.z = 10.0;
 751     s->ball.y = GAME_Y_MID;
 752     s->ball.move_x = 0.0;
 753     s->ball.move_y = 0.0;
 754     s->ball.move_z = 0.0;
 755     s->ball.last_hit_by = -1;
 756     s->ball.inhibit_gravity = true;
 757
 758     if( s->serving_player == 1) {
 759         s->ball.x = GAME_X_MIN-RACKET_X_MID*1.5;
 760     } else {
 761         s->ball.x = GAME_X_MAX+RACKET_X_MID*1.5;
 762     }
 763 }
 764
 765 int score_game(GameState* s) {
 766     Player *last_hit_by = NULL;
 767     Player *other = NULL;
 768
 769     Player* winner = NULL;
 770     Player* loser = NULL;
 771
 772     /* determine "last hit by" and "other" */
 773     if (s->ball.last_hit_by == 1) {
 774         last_hit_by = &(PLAYER(s, 1));
 775         other = &(PLAYER(s, 2));
 776     } else {
 777         last_hit_by = &(PLAYER(s, 2));
 778         other = &(PLAYER(s, 1));
 779     }
 780
 781     switch (s->score_event) {
 782         case SCORE_EVENT_NET:
 783             winner = other;
 784             break;
 785         case SCORE_EVENT_OUT:
 786         case SCORE_EVENT_GROUND_INVALID:
 787         case SCORE_EVENT_OFFSCREEN:
 788         case SCORE_EVENT_GROUND_VALID:
 789             if (s->ball.ground_hit) {
 790                 winner = last_hit_by;
 791             } else {
 792                 winner = other;
 793             }
 794             break;
 795         default:
 796             break;
 797     }
 798
 799     /* determine loser based on winner */
 800     if (winner == last_hit_by) {
 801         loser = other;
 802     } else {
 803         loser = last_hit_by;
 804     }
 805
 806     /* we cannot be in an "impossibly high" set */
 807     assert(s->current_set < SETS_TO_WIN*2-1);
 808
 809     winner->game++;
 810     s->ec_game++;
 811     if( loser->game < winner->game-1) {
 812         if( winner->game >= 4) {
 813             winner->game = loser->game = 0;
 814             winner->sets[s->current_set]++;
 815             s->ec_sets++;
 816
 817             /* serving is changed when the "game" is over */
 818             s->serving_player = (s->serving_player==1)?(2):(1);
 819
 820 #ifdef HAVE_VOICE_FILES
 821             /* speak the current score */
 822             voice_say_list(4, VOICE_ZERO_IN + (PLAYER(s, 1).sets[s->current_set])*2, VOICE_TO, VOICE_ZERO_OUT + (PLAYER(s, 2).sets[s->current_set])*2, VOICE_IN_THE_FIRST_SET+s->current_set);
 823 #endif
 824
 825             /* scoring the set.. */
 826             if( (winner->sets[s->current_set] == 6 && loser->sets[s->current_set] < 5) ||
 827                 winner->sets[s->current_set] == 7) {
 828                 s->current_set++;
 829                 s->winner = game_get_winner( s);
 830             }
 831         }
 832     }
 833
 834     /* forget this event - we've handled it */
 835     s->score_event = SCORE_UNDECIDED;
 836
 837     if (winner == &PLAYER(s, 1)) {
 838         return WINNER_PLAYER1;
 839     } else {
 840         return WINNER_PLAYER2;
 841     }
 842 }
 843
 844 const char* format_sets(const GameState* s) {
 845     static char sets[100];
 846     static char tmp[100];
 847     int i, max = s->current_set;
 848
 849     sets[0] = '\0';
 850
 851     if( s->winner != WINNER_NONE) {
 852         max--;
 853     }
 854     for( i=0; i<=max; i++) {
 855         sprintf( tmp, "%d:%d, ", PLAYER(s, 1).sets[i], PLAYER(s, 2).sets[i]);
 856         strcat( sets, tmp);
 857     }
 858
 859     sets[strlen(sets)-2] = '\0';
 860
 861     return sets;
 862 }
 863
 864 const char* format_game(const GameState* s) {
 865     static char game[100];
 866     static const int game_scoring[] = { 0, 15, 30, 40 };
 867
 868     if( PLAYER(s, 1).game < 4 && PLAYER(s, 2).game < 4) {
 869 #ifdef HAVE_VOICE_FILES
 870         if (PLAYER(s, 1).game > 0 || PLAYER(s, 2).game > 0) {
 871             if (PLAYER(s, 1).game == PLAYER(s, 2).game) {
 872                 voice_say_list(2, VOICE_LOVE_IN + 2*(PLAYER(s, 1).game), VOICE_ALL);
 873             } else {
 874                 voice_say_list(2, VOICE_LOVE_IN + 2*(PLAYER(s, 1).game), VOICE_LOVE_OUT + 2*(PLAYER(s, 2).game));
 875             }
 876         }
 877 #endif
 878         sprintf( game, "%d - %d", game_scoring[PLAYER(s, 1).game], game_scoring[PLAYER(s, 2).game]);
 879     } else if( PLAYER(s, 1).game > PLAYER(s, 2).game) {
 880 #ifdef HAVE_VOICE_FILES
 881         voice_say_list(1, VOICE_ADVANTAGE_PLAYER_ONE);
 882 #endif
 883         strcpy( game, "advantage player 1");
 884     } else if( PLAYER(s, 1).game < PLAYER(s, 2).game) {
 885 #ifdef HAVE_VOICE_FILES
 886         voice_say_list(1, VOICE_ADVANTAGE_PLAYER_TWO);
 887 #endif
 888         strcpy( game, "advantage player 2");
 889     } else {
 890 #ifdef HAVE_VOICE_FILES
 891         voice_say_list(1, VOICE_DEUCE);
 892 #endif
 893         strcpy( game, "deuce");
 894     }
 895
 896     return game;
 897 }
 898
 899 const char* format_status(const GameState* s) {
 900     static char status[100];
 901     static const char* set_names[] = { "first", "second", "third", "fourth", "fifth" };
 902
 903     switch (s->status_message) {
 904         case STATUSMSG_NONE:
 905             return "";
 906         case STATUSMSG_WELCOME:
 907             return "welcome to tennix " VERSION;
 908         case STATUSMSG_DEFAULT:
 909             sprintf(status, "%d:%d in %s set",
 910                     PLAYER(s, 1).sets[s->current_set],
 911                     PLAYER(s, 2).sets[s->current_set],
 912                     set_names[s->current_set]);
 913             return status;
 914         case STATUSMSG_NET:
 915             return "net!";
 916         case STATUSMSG_OUT:
 917             return "out!";
 918         case STATUSMSG_FAULT:
 919             return "fault!";
 920         case STATUSMSG_P1SCORES:
 921             return "player 1 scores.";
 922         case STATUSMSG_P2SCORES:
 923             return "player 2 scores.";
 924         case STATUSMSG_VOLLEY:
 925             return "volley!";
 926         case STATUSMSG_DIDNTCATCH:
 927             return "did not catch the ball.";
 928         default:
 929             return "";
 930     }
 931 }
 932
 933 winner_t game_get_winner(const GameState* s) {
 934     unsigned int i;
 935     int sets[2] = {0};
 936
 937     for( i=0; i<s->current_set; i++) {
 938         if( PLAYER(s, 1).sets[i] > PLAYER(s, 2).sets[i]) {
 939             sets[0]++;
 940         } else {
 941             sets[1]++;
 942         }
 943     }
 944
 945     if( sets[0] == SETS_TO_WIN) return WINNER_PLAYER1;
 946     if( sets[1] == SETS_TO_WIN) return WINNER_PLAYER2;
 947
 948     return WINNER_NONE;
 949 }
 950