main.c

   1 /* Variations on RockDodger
   2  * Space Rocks copyright (C) 2001 Paul Holt <pad@pcholt.com>
   3  *
   4  * Project fork 2004, Jason Woofenden and Joshua Grams.
   5  * (a whole bunch of modifications and project rename)
   6
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the
   9  * Free Software Foundation; either version 2 of the License, or (at your
  10  * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21
  22 #include <argp.h>
  23 #include <math.h>
  24 #include <SDL.h>
  25 #include <SDL_image.h>
  26 #include <stdarg.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30
  31 #include "SFont.h"
  32
  33 #include "args.h"
  34 #include "common.h"
  35 #include "config.h"
  36 #include "dust.h"
  37 #include "file.h"
  38 #include "globals.h"
  39 #include "mt.h"
  40 #include "rocks.h"
  41 #include "score.h"
  42 #include "sprite.h"
  43 #include "sound.h"
  44
  45 // ************************************* VARS
  46 // SDL_Surface global variables
  47 SDL_Surface
  48         *surf_screen,   // Screen
  49         *surf_b_variations, // "variations" banner
  50         *surf_b_on, // "on" banner
  51         *surf_b_rockdodger, // "rockdodger" banner
  52         *surf_b_game,   // Title element "game"
  53         *surf_b_over,   // Title element "over"
  54         *surf_life,     // Indicator of number of ships remaining
  55         *surf_rock[NROCKS],     // THE ROCKS
  56         *surf_font_big; // The big font
  57
  58
  59 SFont_Font *g_font;
  60
  61 // Structure global variables
  62 struct enginedots edot[MAXENGINEDOTS], *dotptr = edot;
  63 struct bangdots bdot[MAXBANGDOTS], *bdotptr = bdot;
  64
  65 // Other global variables
  66 char topline[1024];
  67 char *initerror = "";
  68
  69 struct ship ship = { SHIP_SPRITE, NULL, XSIZE/2, YSIZE/2, SCREENDXMIN, 0.0 };
  70
  71 float screendx = SCREENDXMIN, screendy = 0.0;
  72 float xscroll, yscroll;
  73 float back_dist;
  74
  75 // all movement is based on t_frame.
  76 float t_frame;  // length of this frame (in ticks = 1/20th second)
  77 int ms_frame;   // length of this frame (milliseconds)
  78 int ms_end;     // end of this frame (milliseconds)
  79
  80 float bangx, bangy, bangdx, bangdy;
  81
  82 int score;
  83
  84 float fadetimer = 0, faderate;
  85
  86 int pausedown = 0, paused = 0;
  87
  88 // bangdot start (bd1) and end (bd2) position:
  89 int bd1 = 0, bd2 = 0;
  90
  91 enum states {
  92         TITLE_PAGE,
  93         GAMEPLAY,
  94         DEAD_PAUSE,
  95         GAME_OVER,
  96         HIGH_SCORE_ENTRY,
  97         HIGH_SCORE_DISPLAY
  98 };
  99 enum states state = TITLE_PAGE;
 100 float state_timeout = 600.0;
 101
 102 #define NSEQUENCE 2
 103 char *sequence[] = {
 104         "Press SPACE to start",
 105         "http://jasonwoof.org/vor"
 106 };
 107
 108 int bangdotlife, nbangdots;
 109 Uint16 heatcolor[W*3];
 110
 111 char *data_dir;
 112 extern char *optarg;
 113 extern int optind, opterr, optopt;
 114
 115 #define TO_TICKS(seconds) ((seconds)*20*opt_gamespeed)
 116
 117 // ************************************* FUNCS
 118
 119 void
 120 init_engine_dots() {
 121         int i;
 122         for(i = 0; i<MAXENGINEDOTS; i++) {
 123                 edot[i].active = 0;
 124         }
 125 }
 126
 127 void
 128 new_bang_dots(int xbang, int ybang, int dx, int dy, SDL_Surface *s)
 129 {
 130         int x,y,endcount;
 131         uint16_t *pixel,c;
 132         uint32_t colorkey;
 133         int row_inc;
 134         double theta,r;
 135         int begin_generate;
 136
 137         begin_generate = SDL_GetTicks();
 138         pixel = s->pixels;
 139         row_inc = s->pitch/sizeof(uint16_t) - s->w;
 140         colorkey = s->format->colorkey;
 141
 142         SDL_LockSurface(s);
 143
 144         endcount = 0;
 145         while (endcount<3) {
 146                 pixel = s->pixels;
 147                 for(y=0; y<s->h; y++) {
 148                         for(x = 0; x<s->w; x++) {
 149                                 c = *pixel++;
 150                                 if(c && c != colorkey) {
 151                                         theta = frnd()*M_PI*2;
 152                                         r = frnd(); r = 1 - r*r;
 153                                         // r = 1 - frnd()*frnd();
 154
 155                                         bdot[bd2].dx = 45*r*cos(theta) + dx;
 156                                         bdot[bd2].dy = 45*r*sin(theta) + dy;
 157                                         bdot[bd2].x = x + xbang;
 158                                         bdot[bd2].y = y + ybang;
 159                                         bdot[bd2].c = 0;
 160                                         bdot[bd2].life = 100;
 161                                         bdot[bd2].decay = frnd()*3 + 1;
 162                                         bdot[bd2].active = 1;
 163
 164                                         // Replace the last few bang dots with the pixels from the exploding object
 165                                         if(endcount>0) bdot[bd2].c = c;
 166
 167                                         bd2 = (bd2+1) % MAXBANGDOTS;
 168                                 }
 169                                 pixel += row_inc;
 170                         }
 171                 }
 172                 if(SDL_GetTicks() - begin_generate > 7) endcount++;
 173         }
 174
 175         SDL_UnlockSurface(s);
 176 }
 177
 178 void
 179 draw_bang_dots(SDL_Surface *s)
 180 {
 181         int i;
 182         int first_i, last_i;
 183         uint16_t *pixels, *pixel, c;
 184         int row_inc = s->pitch/sizeof(uint16_t);
 185
 186         pixels = (uint16_t *) s->pixels;
 187         first_i = -1;
 188         last_i = 0;
 189
 190         for(i=0; i<MAXBANGDOTS; i++) {
 191                 if(!bdot[i].active) continue;
 192
 193                 // decrement life and maybe kill
 194                 bdot[i].life -= bdot[i].decay;
 195                 if(bdot[i].life<0) { bdot[i].active = 0; continue; }
 196
 197                 // move and clip
 198                 bdot[i].x += bdot[i].dx*t_frame - xscroll;
 199                 bdot[i].y += bdot[i].dy*t_frame - yscroll;
 200                 if(bdot[i].x < 0 || bdot[i].x >= XSIZE || bdot[i].y < 0 || bdot[i].y >= YSIZE) {
 201                         bdot[i].active = 0;
 202                         continue;
 203                 }
 204
 205                 // check collisions
 206                 if(pixel_hit_rocks(bdot[i].x, bdot[i].y)) { bdot[i].active = 0; continue; }
 207
 208                 pixel = pixels + row_inc*(int)(bdot[i].y) + (int)(bdot[i].x);
 209                 if(bdot[i].c) c = bdot[i].c; else c = heatcolor[(int)(bdot[i].life)*3];
 210                 *pixel = c;
 211         }
 212 }
 213
 214
 215 void
 216 new_engine_dots(int n, int dir) {
 217         int i;
 218         float a, r;  // angle, random length
 219         float dx, dy;
 220         float hx, hy; // half ship width/height.
 221         static const int s[4] = { 2, 1, 0, 1 };
 222
 223         hx = ship.image->w / 2;
 224         hy = ship.image->h / 2;
 225
 226         for(i = 0; i<n; i++) {
 227                 if(dotptr->active == 0) {
 228                         a = frnd()*M_PI + (dir-1)*M_PI_2;
 229                         r = sin(frnd()*M_PI);
 230                         dx = r * cos(a);
 231                         dy = r * -sin(a);  // screen y is "backwards".
 232
 233                         dotptr->active = 1;
 234                         dotptr->x = ship.x + s[dir]*hx + (frnd()-0.5)*3;
 235                         dotptr->y = ship.y + s[(dir+1)&3]*hy + (frnd()-0.5)*3;
 236                         if(dir&1) {
 237                                 dotptr->dx = ship.dx + 2*dx;
 238                                 dotptr->dy = ship.dy + 20*dy;
 239                                 dotptr->life = 60 * fabs(dy);
 240                         } else {
 241                                 dotptr->dx = ship.dx + 20*dx;
 242                                 dotptr->dy = ship.dy + 2*dy;
 243                                 dotptr->life = 60 * fabs(dx);
 244                         }
 245
 246                         if(dotptr - edot < MAXENGINEDOTS-1) dotptr++;
 247                         else dotptr = edot;
 248                 }
 249         }
 250 }
 251
 252 void
 253 draw_engine_dots(SDL_Surface *s) {
 254         int i;
 255         uint16_t c;
 256         uint16_t *pixels = (uint16_t *) s->pixels;
 257         int row_inc = s->pitch/sizeof(uint16_t);
 258         int heatindex;
 259
 260         for(i = 0; i<MAXENGINEDOTS; i++) {
 261                 if(!edot[i].active) continue;
 262                 edot[i].x += edot[i].dx*t_frame - xscroll;
 263                 edot[i].y += edot[i].dy*t_frame - yscroll;
 264                 edot[i].life -= t_frame*3;
 265                 if(edot[i].life < 0
 266                                 || edot[i].x<0 || edot[i].x >= XSIZE
 267                                 || edot[i].y<0 || edot[i].y >= YSIZE) {
 268                         edot[i].active = 0;
 269                         continue;
 270                 }
 271                 if(pixel_hit_rocks(edot[i].x, edot[i].y)) { edot[i].active = 0; continue; }
 272                 heatindex = edot[i].life * 6;
 273                 c = heatindex>3*W ? heatcolor[3*W-1] : heatcolor[heatindex];
 274                 pixels[row_inc*(int)(edot[i].y) + (int)(edot[i].x)] = c;
 275         }
 276 }
 277
 278 void
 279 drawdots(SDL_Surface *s) {
 280         int m;
 281
 282         // Create engine dots out the side we're moving from
 283         for(m = 0; m<4; m++) {
 284                 if(ship.jets & 1<<m) { // 'jets' is a bit field
 285                         new_engine_dots(80,m);
 286                 }
 287         }
 288
 289         move_dust();
 290
 291         SDL_LockSurface(s);
 292         draw_dust(s);
 293         draw_engine_dots(s);
 294         draw_bang_dots(s);
 295         SDL_UnlockSurface(s);
 296 }
 297
 298 SDL_Surface *
 299 load_image(char *filename)
 300 {
 301         SDL_Surface *tmp, *img = NULL;
 302         char *s = add_data_path(filename);
 303         if(s) {
 304                 tmp = IMG_Load(s);
 305                 free(s);
 306                 if(tmp) {
 307                         img = SDL_DisplayFormat(tmp);
 308                         SDL_FreeSurface(tmp);
 309                 }
 310         }
 311         return img;
 312 }
 313
 314 int
 315 init(void) {
 316
 317         int i;
 318         char *s;
 319         Uint32 flag;
 320
 321         // Where are our data files?
 322         if(!find_files()) exit(1);
 323         read_high_score_table();
 324
 325         if(opt_sound) {
 326                 // Initialize SDL with audio and video
 327                 if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) != 0) {
 328                         opt_sound = 0;
 329                         fputs("Can't open sound, starting without it\n", stderr);
 330                         atexit(SDL_Quit);
 331                 } else {
 332                         atexit(SDL_Quit);
 333                         atexit(SDL_CloseAudio);
 334                         opt_sound = init_sound();
 335                 }
 336         } else {
 337                 // Initialize with video only
 338                 CONDERROR(SDL_Init(SDL_INIT_VIDEO) != 0);
 339                 atexit(SDL_Quit);
 340         }
 341
 342         play_tune(TUNE_TITLE_PAGE);
 343
 344         // Attempt to get the required video size
 345         flag = SDL_DOUBLEBUF | SDL_HWSURFACE;
 346         if(opt_fullscreen) flag |= SDL_FULLSCREEN;
 347         surf_screen = SDL_SetVideoMode(XSIZE,YSIZE,16,flag);
 348
 349         // Set the title bar text
 350         SDL_WM_SetCaption("Variations on Rockdodger", "VoR");
 351
 352         NULLERROR(surf_screen);
 353
 354         // Set the heat color from the range 0 (cold) to 300 (blue-white)
 355         for(i = 0; i<W*3; i++) {
 356                 heatcolor[i] = SDL_MapRGB(
 357                         surf_screen->format,
 358                         (i<W)?(i*M/W):(M),(i<W)?0:(i<2*W)?((i-W)*M/W):M,(i<2*W)?0:((i-W)*M/W) // Got that?
 359                 );
 360         }
 361
 362         // Load the banners
 363         NULLERROR(surf_b_variations = load_image("banners/variations.png"));
 364         NULLERROR(surf_b_on = load_image("banners/on.png"));
 365         NULLERROR(surf_b_rockdodger = load_image("banners/rockdodger.png"));
 366
 367         NULLERROR(surf_b_game = load_image("banners/game.png"));
 368         NULLERROR(surf_b_over = load_image("banners/over.png"));
 369
 370         // Load the spaceship graphic.
 371         load_sprite(SPRITE(&ship), "sprites/ship.png");
 372
 373         // Load the life indicator (small ship) graphic.
 374         NULLERROR(surf_life = load_image("indicators/life.png"));
 375
 376         // Load the font image
 377         s = add_data_path(BIG_FONT_FILE);
 378         if(s) {
 379                 NULLERROR(surf_font_big = IMG_Load(s));
 380                 free(s);
 381                 g_font = SFont_InitFont(surf_font_big);
 382         }
 383
 384         init_engine_dots();
 385         init_dust();
 386
 387         init_rocks();
 388
 389         // Remove the mouse cursor
 390 #ifdef SDL_DISABLE
 391         SDL_ShowCursor(SDL_DISABLE);
 392 #endif
 393
 394         return 0;
 395 }
 396
 397 int
 398 draw() {
 399         int i;
 400         SDL_Rect dest;
 401         int bang, x;
 402         char *text;
 403         float fadegame,fadeover;
 404
 405         bang = 0;
 406
 407         // Draw a fully black background
 408         SDL_FillRect(surf_screen,NULL,0);
 409
 410         // Draw the background dots
 411         drawdots(surf_screen);
 412
 413         // Draw ship
 414         if(state == GAMEPLAY ) {
 415                 dest.x = ship.x;
 416                 dest.y = ship.y;
 417                 SDL_BlitSurface(ship.image,NULL,surf_screen,&dest);
 418         }
 419
 420         draw_rocks();
 421
 422         // Draw the life indicators.
 423         if(state == GAMEPLAY || state == DEAD_PAUSE || state == GAME_OVER) {
 424                 for(i = 0; i<ship.lives-1; i++) {
 425                         dest.x = (i + 1)*(surf_life->w + 10);
 426                         dest.y = 20;
 427                         SDL_BlitSurface(surf_life, NULL, surf_screen, &dest);
 428                 }
 429         }
 430
 431         // Draw the score
 432         snprintscore_line(topline, 50, score);
 433         SFont_Write(surf_screen, g_font, XSIZE-250, 0, topline);
 434
 435         // If it's game over, show the game over graphic in the dead centre
 436         switch (state) {
 437                 case GAME_OVER:
 438                         if(fadetimer<3.0/faderate) {
 439                                 fadegame = fadetimer/(3.0/faderate);
 440                         } else {
 441                                 fadegame = 1.0;
 442                         }
 443
 444                         if(fadetimer<3.0/faderate) {
 445                                 fadeover = 0.0;
 446                         } else if(fadetimer<6.0/faderate) {
 447                                 fadeover = ((3.0/faderate)-fadetimer)/(6.0/faderate);
 448                         } else {
 449                                 fadeover = 1.0;
 450                         }
 451
 452                         dest.x = (XSIZE-surf_b_game->w)/2;
 453                         dest.y = (YSIZE-surf_b_game->h)/2-40;
 454                         SDL_SetAlpha(surf_b_game, SDL_SRCALPHA, (int)(fadegame*(200 + 55*cos(fadetimer += t_frame/1.0))));
 455                         SDL_BlitSurface(surf_b_game,NULL,surf_screen,&dest);
 456
 457                         dest.x = (XSIZE-surf_b_over->w)/2;
 458                         dest.y = (YSIZE-surf_b_over->h)/2 + 40;
 459                         SDL_SetAlpha(surf_b_over, SDL_SRCALPHA, (int)(fadeover*(200 + 55*sin(fadetimer))));
 460                         SDL_BlitSurface(surf_b_over,NULL,surf_screen,&dest);
 461                 break;
 462
 463                 case TITLE_PAGE:
 464
 465                         dest.x = (XSIZE-surf_b_variations->w)/2 + cos(fadetimer/6.5)*10;
 466                         dest.y = (YSIZE/2-surf_b_variations->h)/2 + sin(fadetimer/5.0)*10;
 467                         SDL_SetAlpha(surf_b_variations, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer += t_frame/2.0)));
 468                         SDL_BlitSurface(surf_b_variations,NULL,surf_screen,&dest);
 469
 470                         dest.x = (XSIZE-surf_b_on->w)/2 + cos((fadetimer + 1.0)/6.5)*10;
 471                         dest.y = (YSIZE/2-surf_b_on->h)/2 + surf_b_variations->h + 20 + sin((fadetimer + 1.0)/5.0)*10;
 472                         SDL_SetAlpha(surf_b_on, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-1.0)));
 473                         SDL_BlitSurface(surf_b_on,NULL,surf_screen,&dest);
 474
 475                         dest.x = (XSIZE-surf_b_rockdodger->w)/2 + cos((fadetimer + 2.0)/6.5)*10;
 476                         dest.y = (YSIZE/2-surf_b_rockdodger->h)/2 + surf_b_variations->h + surf_b_on->h + 40 + sin((fadetimer + 2.0)/5)*10;
 477                         SDL_SetAlpha(surf_b_rockdodger, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-2.0)));
 478                         SDL_BlitSurface(surf_b_rockdodger,NULL,surf_screen,&dest);
 479
 480                         text = "Version " VERSION;
 481                         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + sin(fadetimer/4.5)*10;
 482                         SFont_Write(surf_screen,g_font,x,YSIZE-50 + sin(fadetimer/2)*5,text);
 483
 484                         text = sequence[(int)(fadetimer/40)%NSEQUENCE];
 485                         //text = "Press SPACE to start!";
 486                         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + cos(fadetimer/4.5)*10;
 487                         SFont_Write(surf_screen,g_font,x,YSIZE-100 + cos(fadetimer/3)*5,text);
 488                 break;
 489
 490                 case HIGH_SCORE_ENTRY:
 491                         play_tune(TUNE_HIGH_SCORE_ENTRY);
 492                         if(!process_score_input()) {  // done inputting name
 493
 494                                 // Change state to briefly show high scores page
 495                                 state = HIGH_SCORE_DISPLAY;
 496                                 state_timeout = 200;
 497
 498                                 // Write the high score table to the file
 499                                 write_high_score_table();
 500
 501                                 play_tune(TUNE_TITLE_PAGE);
 502                         }
 503                 // FALL THROUGH TO
 504                 case HIGH_SCORE_DISPLAY:
 505                         // Display de list o high scores mon.
 506                         display_scores(surf_screen, 150,50);
 507                         break;
 508                 case GAMEPLAY:
 509                 case DEAD_PAUSE:
 510                         ; // no action necessary
 511         }
 512
 513         if(state == GAMEPLAY) {
 514                 bang = hit_rocks(SPRITE(&ship));
 515         }
 516
 517         ms_frame = SDL_GetTicks() - ms_end;
 518         ms_end += ms_frame;
 519         if(ms_frame>200 || ms_frame<0) {
 520                 // We won't run at all below 5 frames per second.
 521                 // This also happens if we were paused, grr.
 522                 t_frame = 0;
 523                 ms_frame = 0;
 524         } else {
 525                 t_frame = opt_gamespeed * ms_frame / 50;
 526                 if(state == GAMEPLAY) score += ms_frame;
 527         }
 528
 529         // Update the surface
 530         SDL_Flip(surf_screen);
 531
 532
 533         return bang;
 534 }
 535
 536 int
 537 gameloop() {
 538         Uint8 *keystate = SDL_GetKeyState(NULL);
 539         float tmp;
 540
 541
 542         for(;;) {
 543                 if(!paused) {
 544                         // Count down the game loop timer, and change state when it gets to zero or less;
 545
 546                         if((state_timeout -= t_frame*3) < 0) {
 547                                 switch(state) {
 548                                         case DEAD_PAUSE:
 549                                                 // Create a new ship and start all over again
 550                                                 state = GAMEPLAY;
 551                                                 play_tune(TUNE_GAMEPLAY);
 552                                                 break;
 553                                         case GAME_OVER:
 554                                                 if(new_high_score(score)) {
 555                                                         SDL_Event e;
 556                                                         state = HIGH_SCORE_ENTRY;
 557                                                         state_timeout = 5.0e6;
 558                                                         SDL_EnableUNICODE(1);
 559                                                         while(SDL_PollEvent(&e))
 560                                                                 ;
 561                                                 } else if(!keystate[SDLK_SPACE]) {
 562                                                         state = HIGH_SCORE_DISPLAY;
 563                                                         state_timeout = 400;
 564                                                 }
 565                                                 break;
 566                                         case HIGH_SCORE_DISPLAY:
 567                                                 state = TITLE_PAGE;
 568                                                 state_timeout = 500.0;
 569                                                 break;
 570                                         case HIGH_SCORE_ENTRY:
 571                                                 break;
 572                                         case TITLE_PAGE:
 573                                                 state = HIGH_SCORE_DISPLAY;
 574                                                 state_timeout = 200.0;
 575                                                 break;
 576                                         case GAMEPLAY:
 577                                                 ; // no action necessary
 578                                 }
 579                         } else {
 580                                 if(state == DEAD_PAUSE) {
 581                                         float blast_radius;
 582                                         int fixonly;
 583
 584                                         if(state_timeout < DEAD_PAUSE_LENGTH - 20.0) {
 585                                                 blast_radius = BLAST_RADIUS * 1.3;
 586                                                 fixonly = 1;
 587                                         } else {
 588                                                 blast_radius = BLAST_RADIUS * (DEAD_PAUSE_LENGTH - state_timeout) / 20.0;
 589                                                 fixonly = 0;
 590                                         }
 591                                         blast_rocks(bangx, bangy, blast_radius, fixonly);
 592
 593                                         if(bangx < 60) bangx = 60;
 594                                 }
 595                         }
 596
 597                         new_rocks();
 598
 599                         // SCROLLING
 600                         tmp = (ship.y+ship.dy*t_frame-YSCROLLTO)/25 + (ship.dy-screendy);
 601                         screendy += tmp * t_frame/12;
 602                         tmp = (ship.x+ship.dx*t_frame-XSCROLLTO)/25 + (ship.dx-screendx);
 603                         screendx += tmp * t_frame/12;
 604                         // taper off so we don't hit the barrier abruptly.
 605                         // (if we would hit in < 2 seconds, adjust to 2 seconds).
 606                         if(back_dist + (screendx - SCREENDXMIN)*TO_TICKS(2) < 0) {
 607                                 screendx = SCREENDXMIN - (back_dist/TO_TICKS(2));
 608                         }
 609
 610                         back_dist += (screendx - SCREENDXMIN)*t_frame;
 611                         if(opt_max_lead >= 0) back_dist = min(back_dist, opt_max_lead);
 612
 613                         xscroll = screendx * t_frame;
 614                         yscroll = screendy * t_frame;
 615
 616                         ship.x += ship.dx*t_frame - xscroll;
 617                         ship.y += ship.dy*t_frame - yscroll;
 618
 619                         // move bang center
 620                         bangx += bangdx*t_frame - xscroll;
 621                         bangy += bangdy*t_frame - yscroll;
 622
 623                         move_rocks();
 624
 625
 626                         // BOUNCE X
 627                         if(ship.x<0 || ship.x>XSIZE-ship.image->w) {
 628                                 // BOUNCE from left and right wall
 629                                 ship.x -= (ship.dx-screendx)*t_frame;
 630                                 ship.dx = screendx - (ship.dx-screendx)*opt_bounciness;
 631                         }
 632
 633                         // BOUNCE Y
 634                         if(ship.y<0 || ship.y>YSIZE-ship.image->h) {
 635                                 // BOUNCE from top and bottom wall
 636                                 ship.y -= (ship.dy-screendy)*t_frame;
 637                                 ship.dy = screendy - (ship.dy-screendy)*opt_bounciness;
 638                         }
 639
 640
 641                         if(draw() && state == GAMEPLAY) {
 642                                 // Died
 643                                 play_sound(SOUND_BANG); // Play the explosion sound
 644                                 bangx = ship.x; bangy = ship.y; bangdx = ship.dx; bangdy = ship.dy;
 645                                         new_bang_dots(ship.x,ship.y,ship.dx,ship.dy,ship.image);
 646                                         ship.dx *= 0.5; ship.dy *= 0.5;
 647                                 if(ship.dx < SCREENDXMIN) ship.dx = SCREENDXMIN;
 648                                 if(--ship.lives <= 0) {
 649                                         state = GAME_OVER;
 650                                         ship.dx = SCREENDXMIN; ship.dy = 0;
 651                                         state_timeout = 200.0;
 652                                         fadetimer = 0.0;
 653                                         faderate = t_frame;
 654                                 }
 655                                 else {
 656                                         state = DEAD_PAUSE;
 657                                         state_timeout = DEAD_PAUSE_LENGTH;
 658                                 }
 659                         }
 660
 661                         SDL_PumpEvents();
 662                         keystate = SDL_GetKeyState(NULL);
 663
 664                         // new game
 665                         if(keystate[SDLK_SPACE] && (state == HIGH_SCORE_DISPLAY || state == TITLE_PAGE)) {
 666
 667                                 reset_rocks();
 668
 669                                 ship.lives = 4;
 670                                 score = 0;
 671
 672                                 state = GAMEPLAY;
 673                                 play_tune(TUNE_GAMEPLAY);
 674
 675                                 ship.x = XSIZE/2.2; ship.y = YSIZE/2;
 676                                 ship.dx = screendx; ship.dy = screendy;
 677                         }
 678
 679                         ship.jets = 0;
 680                 } else {
 681                         SDL_PumpEvents();
 682                         keystate = SDL_GetKeyState(NULL);
 683                 }
 684
 685                 if(state == GAMEPLAY) {
 686                         if(!paused) {
 687                                 if(keystate[SDLK_LEFT]  | keystate[SDLK_h]) { ship.dx -= 1.5*t_frame; ship.jets |= 1<<0;}
 688                                 if(keystate[SDLK_DOWN]  | keystate[SDLK_t]) { ship.dy += 1.5*t_frame; ship.jets |= 1<<1;}
 689                                 if(keystate[SDLK_RIGHT] | keystate[SDLK_n]) { ship.dx += 1.5*t_frame; ship.jets |= 1<<2;}
 690                                 if(keystate[SDLK_UP]    | keystate[SDLK_c]) { ship.dy -= 1.5*t_frame; ship.jets |= 1<<3;}
 691                                 if(keystate[SDLK_3])            { SDL_SaveBMP(surf_screen, "snapshot.bmp"); }
 692                         }
 693
 694                         if(keystate[SDLK_p] | keystate[SDLK_s]) {
 695                                 if(!pausedown) {
 696                                         paused = !paused;
 697                                         pausedown = 1;
 698                                 }
 699                         } else {
 700                                 pausedown = 0;
 701                         }
 702                 } else if(state == GAME_OVER) {
 703                         if(keystate[SDLK_SPACE]) {
 704                                 state_timeout = -1;
 705                         }
 706                 }
 707
 708                 if(state != HIGH_SCORE_ENTRY && (keystate[SDLK_q] || keystate[SDLK_ESCAPE])) {
 709                         return 0;
 710                 }
 711
 712         }
 713 }
 714
 715 int
 716 main(int argc, char **argv) {
 717         init_opts();
 718         argp_parse(&argp, argc, argv, 0, 0, 0);
 719
 720         if(init()) {
 721                 printf ("ta: '%s'\n",initerror);
 722                 return 1;
 723         }
 724
 725         gameloop();
 726
 727         return 0;
 728 }