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