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, 0, NULL, XSIZE/2, YSIZE/2, SCREENDXMIN, 0.0 };
  70
  71 float screendx = SCREENDXMIN, screendy = 0.0;
  72 float back_dist;
  73
  74 // all movement is based on t_frame.
  75 float t_frame;  // length of this frame (in ticks = 1/20th second)
  76 int ms_frame;   // length of this frame (milliseconds)
  77 int ms_end;     // end of this frame (milliseconds)
  78
  79 int bang = false;
  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 - screendx)*t_frame;
 199                 bdot[i].y += (bdot[i].dy - screendy)*t_frame;
 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_collides(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 - screendx)*t_frame;
 263                 edot[i].y += (edot[i].dy - screendy)*t_frame;
 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_collides(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 void
 315 load_ship(void)
 316 {
 317         load_sprite(SPRITE(&ship), "sprites/ship.png");
 318 }
 319
 320 int
 321 init(void) {
 322
 323         int i;
 324         char *s;
 325         Uint32 flag;
 326
 327         // Where are our data files?
 328         if(!find_files()) exit(1);
 329         read_high_score_table();
 330
 331         if(opt_sound) {
 332                 // Initialize SDL with audio and video
 333                 if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) != 0) {
 334                         opt_sound = 0;
 335                         fputs("Can't open sound, starting without it\n", stderr);
 336                         atexit(SDL_Quit);
 337                 } else {
 338                         atexit(SDL_Quit);
 339                         atexit(SDL_CloseAudio);
 340                         opt_sound = init_sound();
 341                 }
 342         } else {
 343                 // Initialize with video only
 344                 CONDERROR(SDL_Init(SDL_INIT_VIDEO) != 0);
 345                 atexit(SDL_Quit);
 346         }
 347
 348         play_tune(TUNE_TITLE_PAGE);
 349
 350         // Attempt to get the required video size
 351         flag = SDL_DOUBLEBUF | SDL_HWSURFACE;
 352         if(opt_fullscreen) flag |= SDL_FULLSCREEN;
 353         surf_screen = SDL_SetVideoMode(XSIZE,YSIZE,16,flag);
 354
 355         // Set the title bar text
 356         SDL_WM_SetCaption("Variations on Rockdodger", "VoR");
 357
 358         NULLERROR(surf_screen);
 359
 360         // Set the heat color from the range 0 (cold) to 300 (blue-white)
 361         for(i = 0; i<W*3; i++) {
 362                 heatcolor[i] = SDL_MapRGB(
 363                         surf_screen->format,
 364                         (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?
 365                 );
 366         }
 367
 368         // Load the banners
 369         NULLERROR(surf_b_variations = load_image("banners/variations.png"));
 370         NULLERROR(surf_b_on = load_image("banners/on.png"));
 371         NULLERROR(surf_b_rockdodger = load_image("banners/rockdodger.png"));
 372
 373         NULLERROR(surf_b_game = load_image("banners/game.png"));
 374         NULLERROR(surf_b_over = load_image("banners/over.png"));
 375
 376         // Load the life indicator (small ship) graphic.
 377         NULLERROR(surf_life = load_image("indicators/life.png"));
 378
 379         // Load the font image
 380         s = add_data_path(BIG_FONT_FILE);
 381         if(s) {
 382                 NULLERROR(surf_font_big = IMG_Load(s));
 383                 free(s);
 384                 g_font = SFont_InitFont(surf_font_big);
 385         }
 386
 387         init_engine_dots();
 388         init_dust();
 389
 390         init_sprites();
 391         add_sprite(SPRITE(&ship));
 392
 393         // Remove the mouse cursor
 394 #ifdef SDL_DISABLE
 395         SDL_ShowCursor(SDL_DISABLE);
 396 #endif
 397
 398         return 0;
 399 }
 400
 401 void
 402 show_lives(void)
 403 {
 404         int i;
 405         SDL_Rect dest;
 406
 407         for(i=0; i<ship.lives-1; i++) {
 408                 dest.x = (i + 1)*(surf_life->w + 10);
 409                 dest.y = 20;
 410                 SDL_BlitSurface(surf_life, NULL, surf_screen, &dest);
 411         }
 412 }
 413
 414 void
 415 draw(void) {
 416         SDL_Rect dest;
 417         int x;
 418         char *text;
 419         float fadegame,fadeover;
 420
 421         SDL_FillRect(surf_screen,NULL,0);  // black background
 422         drawdots(surf_screen);             // background dots
 423         draw_sprite(SPRITE(&ship));
 424         draw_rocks();
 425
 426         show_lives();
 427         show_score();
 428
 429         // If it's game over, show the game over graphic in the dead centre
 430         switch (state) {
 431                 case GAME_OVER:
 432                         if(fadetimer<3.0/faderate) {
 433                                 fadegame = fadetimer/(3.0/faderate);
 434                         } else {
 435                                 fadegame = 1.0;
 436                         }
 437
 438                         if(fadetimer<3.0/faderate) {
 439                                 fadeover = 0.0;
 440                         } else if(fadetimer<6.0/faderate) {
 441                                 fadeover = ((3.0/faderate)-fadetimer)/(6.0/faderate);
 442                         } else {
 443                                 fadeover = 1.0;
 444                         }
 445
 446                         dest.x = (XSIZE-surf_b_game->w)/2;
 447                         dest.y = (YSIZE-surf_b_game->h)/2-40;
 448                         SDL_SetAlpha(surf_b_game, SDL_SRCALPHA, (int)(fadegame*(200 + 55*cos(fadetimer += t_frame/1.0))));
 449                         SDL_BlitSurface(surf_b_game,NULL,surf_screen,&dest);
 450
 451                         dest.x = (XSIZE-surf_b_over->w)/2;
 452                         dest.y = (YSIZE-surf_b_over->h)/2 + 40;
 453                         SDL_SetAlpha(surf_b_over, SDL_SRCALPHA, (int)(fadeover*(200 + 55*sin(fadetimer))));
 454                         SDL_BlitSurface(surf_b_over,NULL,surf_screen,&dest);
 455                 break;
 456
 457                 case TITLE_PAGE:
 458
 459                         dest.x = (XSIZE-surf_b_variations->w)/2 + cos(fadetimer/6.5)*10;
 460                         dest.y = (YSIZE/2-surf_b_variations->h)/2 + sin(fadetimer/5.0)*10;
 461                         SDL_SetAlpha(surf_b_variations, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer += t_frame/2.0)));
 462                         SDL_BlitSurface(surf_b_variations,NULL,surf_screen,&dest);
 463
 464                         dest.x = (XSIZE-surf_b_on->w)/2 + cos((fadetimer + 1.0)/6.5)*10;
 465                         dest.y = (YSIZE/2-surf_b_on->h)/2 + surf_b_variations->h + 20 + sin((fadetimer + 1.0)/5.0)*10;
 466                         SDL_SetAlpha(surf_b_on, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-1.0)));
 467                         SDL_BlitSurface(surf_b_on,NULL,surf_screen,&dest);
 468
 469                         dest.x = (XSIZE-surf_b_rockdodger->w)/2 + cos((fadetimer + 2.0)/6.5)*10;
 470                         dest.y = (YSIZE/2-surf_b_rockdodger->h)/2 + surf_b_variations->h + surf_b_on->h + 40 + sin((fadetimer + 2.0)/5)*10;
 471                         SDL_SetAlpha(surf_b_rockdodger, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-2.0)));
 472                         SDL_BlitSurface(surf_b_rockdodger,NULL,surf_screen,&dest);
 473
 474                         text = "Version " VERSION;
 475                         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + sin(fadetimer/4.5)*10;
 476                         SFont_Write(surf_screen,g_font,x,YSIZE-50 + sin(fadetimer/2)*5,text);
 477
 478                         text = sequence[(int)(fadetimer/40)%NSEQUENCE];
 479                         //text = "Press SPACE to start!";
 480                         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + cos(fadetimer/4.5)*10;
 481                         SFont_Write(surf_screen,g_font,x,YSIZE-100 + cos(fadetimer/3)*5,text);
 482                 break;
 483
 484                 case HIGH_SCORE_ENTRY:
 485                         play_tune(TUNE_HIGH_SCORE_ENTRY);
 486                         if(!process_score_input()) {  // done inputting name
 487
 488                                 // Change state to briefly show high scores page
 489                                 state = HIGH_SCORE_DISPLAY;
 490                                 state_timeout = 200;
 491
 492                                 // Write the high score table to the file
 493                                 write_high_score_table();
 494
 495                                 play_tune(TUNE_TITLE_PAGE);
 496                         }
 497                 // FALL THROUGH TO
 498                 case HIGH_SCORE_DISPLAY:
 499                         // Display de list o high scores mon.
 500                         display_scores(surf_screen, 150,50);
 501                         break;
 502                 case GAMEPLAY:
 503                 case DEAD_PAUSE:
 504                         ; // no action necessary
 505         }
 506
 507         collisions();
 508
 509         ms_frame = SDL_GetTicks() - ms_end;
 510         ms_end += ms_frame;
 511         t_frame = opt_gamespeed * ms_frame / 50;
 512         if(state == GAMEPLAY) score += ms_frame;
 513
 514         // Update the surface
 515         SDL_Flip(surf_screen);
 516 }
 517
 518 static inline void
 519 kill_ship(Sprite *ship)
 520 {
 521         ship->flags = MOVE|DRAW;
 522         SDL_SetAlpha(ship->image, SDL_SRCALPHA, 0);
 523         bang = true;
 524 }
 525
 526 void
 527 do_collision(Sprite *a, Sprite *b)
 528 {
 529         if(a->type == SHIP) kill_ship(a);
 530         else if (b->type == SHIP) kill_ship(b);
 531         else bounce(a, b);
 532 }
 533
 534 void
 535 gameloop() {
 536         Uint8 *keystate = SDL_GetKeyState(NULL);
 537         float tmp;
 538
 539
 540         for(;;) {
 541                 SDL_PumpEvents();
 542                 keystate = SDL_GetKeyState(NULL);
 543
 544                 if(!paused) {
 545                         // Count down the game loop timer, and change state when it gets to zero or less;
 546
 547                         if((state_timeout -= t_frame*3) < 0) {
 548                                 switch(state) {
 549                                         case DEAD_PAUSE:
 550                                                 // Restore the ship and continue playing
 551                                                 ship.flags = DRAW|MOVE|COLLIDE;
 552                                                 state = GAMEPLAY;
 553                                                 play_tune(TUNE_GAMEPLAY);
 554                                                 break;
 555                                         case GAME_OVER:
 556                                                 if(new_high_score(score)) {
 557                                                         SDL_Event e;
 558                                                         state = HIGH_SCORE_ENTRY;
 559                                                         state_timeout = 5.0e6;
 560                                                         SDL_EnableUNICODE(1);
 561                                                         while(SDL_PollEvent(&e))
 562                                                                 ;
 563                                                 } else {
 564                                                         state = HIGH_SCORE_DISPLAY;
 565                                                         state_timeout = 400;
 566                                                 }
 567                                                 break;
 568                                         case HIGH_SCORE_DISPLAY:
 569                                                 state = TITLE_PAGE;
 570                                                 state_timeout = 500.0;
 571                                                 break;
 572                                         case HIGH_SCORE_ENTRY:
 573                                                 break;
 574                                         case TITLE_PAGE:
 575                                                 state = HIGH_SCORE_DISPLAY;
 576                                                 state_timeout = 200.0;
 577                                                 break;
 578                                         case GAMEPLAY:
 579                                                 ; // no action necessary
 580                                 }
 581                         } else {
 582                                 if(state == DEAD_PAUSE) {
 583                                         float blast_radius, alpha;
 584                                         if(state_timeout >= DEAD_PAUSE_LENGTH - 20.0) {
 585                                                 blast_radius = BLAST_RADIUS * (DEAD_PAUSE_LENGTH - state_timeout) / 20.0;
 586                                                 blast_rocks(bangx, bangy, blast_radius);
 587                                         }
 588
 589                                         if(bangx < 60) bangx = 60;
 590
 591                                         alpha = 255.0 * (DEAD_PAUSE_LENGTH - state_timeout) / DEAD_PAUSE_LENGTH;
 592                                         SDL_SetAlpha(ship.image, SDL_SRCALPHA, (uint8_t)alpha);
 593                                 }
 594                         }
 595
 596                         new_rocks();
 597
 598                         // SCROLLING
 599                         tmp = (ship.y+ship.dy*t_frame-YSCROLLTO)/25 + (ship.dy-screendy);
 600                         screendy += tmp * t_frame/12;
 601                         tmp = (ship.x+ship.dx*t_frame-XSCROLLTO)/25 + (ship.dx-screendx);
 602                         screendx += tmp * t_frame/12;
 603                         // taper off so we don't hit the barrier abruptly.
 604                         // (if we would hit in < 2 seconds, adjust to 2 seconds).
 605                         if(back_dist + (screendx - SCREENDXMIN)*TO_TICKS(2) < 0)
 606                                 screendx = SCREENDXMIN - (back_dist/TO_TICKS(2));
 607                         back_dist += (screendx - SCREENDXMIN)*t_frame;
 608                         if(opt_max_lead >= 0) back_dist = min(back_dist, opt_max_lead);
 609
 610                         // move bang center
 611                         bangx += (bangdx - screendx)*t_frame;
 612                         bangy += (bangdy - screendy)*t_frame;
 613
 614                         move_sprites();
 615
 616
 617                         // BOUNCE off left or right edge of screen
 618                         if(ship.x < 0 || ship.x+ship.w > XSIZE) {
 619                                 ship.x -= (ship.dx-screendx)*t_frame;
 620                                 ship.dx = screendx - (ship.dx-screendx)*opt_bounciness;
 621                         }
 622
 623                         // BOUNCE off top or bottom of screen
 624                         if(ship.y < 0 || ship.y+ship.h > YSIZE) {
 625                                 ship.y -= (ship.dy-screendy)*t_frame;
 626                                 ship.dy = screendy - (ship.dy-screendy)*opt_bounciness;
 627                         }
 628
 629                         draw();
 630
 631                         if(state == GAMEPLAY && bang) {
 632                                 // Died
 633                                 bang = false;
 634                                 play_sound(SOUND_BANG); // Play the explosion sound
 635                                 bangx = ship.x; bangy = ship.y; bangdx = ship.dx; bangdy = ship.dy;
 636                                 new_bang_dots(ship.x,ship.y,ship.dx,ship.dy,ship.image);
 637
 638                                 if(--ship.lives) {
 639                                         state = DEAD_PAUSE;
 640                                         state_timeout = DEAD_PAUSE_LENGTH;
 641                                         ship.dx = (ship.dx < 0) ? -sqrt(-ship.dx) : sqrt(ship.dx);
 642                                         ship.dy = (ship.dy < 0) ? -sqrt(-ship.dy) : sqrt(ship.dy);
 643                                         if(ship.dx < SCREENDXMIN) ship.dx = SCREENDXMIN;
 644                                 } else {
 645                                         state = GAME_OVER;
 646                                         ship.dx = SCREENDXMIN; ship.dy = 0;
 647                                         state_timeout = 200.0;
 648                                         fadetimer = 0.0;
 649                                         faderate = t_frame;
 650                                 }
 651                         }
 652
 653                         // new game
 654                         if(keystate[SDLK_SPACE]
 655                            && (state == HIGH_SCORE_DISPLAY
 656                                || state == TITLE_PAGE
 657                                || state == GAME_OVER)) {
 658                                 reset_sprites();
 659                                 reset_rocks();
 660                                 screendx = SCREENDXMIN; screendy = 0;
 661
 662                                 ship.x = XSIZE/2.2; ship.y = YSIZE/2;
 663                                 ship.dx = screendx; ship.dy = screendy;
 664                                 ship.lives = 4;
 665                                 ship.flags = MOVE|DRAW|COLLIDE;
 666                                 SDL_SetAlpha(ship.image, SDL_SRCALPHA, SDL_ALPHA_OPAQUE);
 667                                 add_sprite(SPRITE(&ship));
 668
 669                                 score = 0;
 670
 671                                 state = GAMEPLAY;
 672                                 play_tune(TUNE_GAMEPLAY);
 673                         }
 674
 675                         ship.jets = 0;
 676                 }
 677
 678                 if(state == GAMEPLAY) {
 679                         if(!paused) {
 680                                 if(keystate[SDLK_LEFT]  | keystate[SDLK_h]) { ship.dx -= 1.5*t_frame; ship.jets |= 1<<0;}
 681                                 if(keystate[SDLK_DOWN]  | keystate[SDLK_t]) { ship.dy += 1.5*t_frame; ship.jets |= 1<<1;}
 682                                 if(keystate[SDLK_RIGHT] | keystate[SDLK_n]) { ship.dx += 1.5*t_frame; ship.jets |= 1<<2;}
 683                                 if(keystate[SDLK_UP]    | keystate[SDLK_c]) { ship.dy -= 1.5*t_frame; ship.jets |= 1<<3;}
 684                                 if(keystate[SDLK_3])            { SDL_SaveBMP(surf_screen, "snapshot.bmp"); }
 685                         }
 686
 687                         if(keystate[SDLK_p] | keystate[SDLK_s]) {
 688                                 if(!pausedown) {
 689                                         paused = !paused;
 690                                         pausedown = 1;
 691                                         if(!paused) ms_end = SDL_GetTicks();
 692                                 }
 693                         } else {
 694                                 pausedown = 0;
 695                         }
 696                 }
 697
 698                 if(state != HIGH_SCORE_ENTRY && (keystate[SDLK_q] || keystate[SDLK_ESCAPE]))
 699                         return;
 700
 701         }
 702 }
 703
 704 int
 705 main(int argc, char **argv) {
 706         init_opts();
 707         argp_parse(&argp, argc, argv, 0, 0, 0);
 708
 709         if(init()) {
 710                 printf ("ta: '%s'\n",initerror);
 711                 return 1;
 712         }
 713
 714         gameloop();
 715
 716         return 0;
 717 }