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/SDL.h>
  25 #include <SDL/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 "shape.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_ship,             // Spaceship element
  55         *surf_life,     // Indicator of number of ships remaining
  56         *surf_rock[NROCKS],     // THE ROCKS
  57         *surf_font_big; // The big font
  58
  59
  60 SFont_Font *g_font;
  61
  62 // Structure global variables
  63 struct enginedots edot[MAXENGINEDOTS], *dotptr = edot;
  64 struct bangdots bdot[MAXBANGDOTS], *bdotptr = bdot;
  65
  66 // Other global variables
  67 char topline[1024];
  68 char *initerror = "";
  69
  70 struct shape shipshape;
  71 float shipx = XSIZE/2, shipy = YSIZE/2; // X position, 0..XSIZE
  72 float shipdx = SCREENDXMIN, shipdy = 0.0;       // Change in X position per tick.
  73 float screendx = SCREENDXMIN, screendy = 0.0;
  74 float xscroll, yscroll;
  75 float back_dist;
  76
  77 // all movement is based on t_frame.
  78 float t_frame;  // length of this frame (in ticks = 1/20th second)
  79 int ms_frame;   // length of this frame (milliseconds)
  80 int ms_end;     // end of this frame (milliseconds)
  81
  82 float bangx, bangy, bangdx, bangdy;
  83
  84 int nships,score;
  85 int jets = 0;
  86
  87 float fadetimer = 0, faderate;
  88
  89 int pausedown = 0, paused = 0;
  90
  91 // bangdot start (bd1) and end (bd2) position:
  92 int bd1 = 0, bd2 = 0;
  93
  94 enum states {
  95         TITLE_PAGE,
  96         GAMEPLAY,
  97         DEAD_PAUSE,
  98         GAME_OVER,
  99         HIGH_SCORE_ENTRY,
 100         HIGH_SCORE_DISPLAY
 101 };
 102 enum states state = TITLE_PAGE;
 103 float state_timeout = 600.0;
 104
 105 #define NSEQUENCE 2
 106 char *sequence[] = {
 107         "Press SPACE to start",
 108         "http://herkamire.com/jason/vor"
 109 };
 110
 111 int bangdotlife, nbangdots;
 112 Uint16 heatcolor[W*3];
 113
 114 char *data_dir;
 115 extern char *optarg;
 116 extern int optind, opterr, optopt;
 117
 118 #define TO_TICKS(seconds) ((seconds)*20*opt_gamespeed)
 119
 120 // ************************************* FUNCS
 121
 122 void
 123 init_engine_dots() {
 124         int i;
 125         for(i = 0; i<MAXENGINEDOTS; i++) {
 126                 edot[i].active = 0;
 127         }
 128 }
 129
 130 void
 131 new_bang_dots(int xbang, int ybang, int dx, int dy, SDL_Surface *s)
 132 {
 133         int x,y,endcount;
 134         uint16_t *pixel,c;
 135         uint32_t colorkey;
 136         int row_inc;
 137         double theta,r;
 138         int begin_generate;
 139
 140         begin_generate = SDL_GetTicks();
 141         pixel = s->pixels;
 142         row_inc = s->pitch/sizeof(uint16_t) - s->w;
 143         colorkey = s->format->colorkey;
 144
 145         SDL_LockSurface(s);
 146
 147         endcount = 0;
 148         while (endcount<3) {
 149                 pixel = s->pixels;
 150                 for(y=0; y<s->h; y++) {
 151                         for(x = 0; x<s->w; x++) {
 152                                 c = *pixel++;
 153                                 if(c && c != colorkey) {
 154                                         theta = frnd()*M_PI*2;
 155                                         r = frnd(); r = 1 - r*r;
 156
 157                                         bdot[bd2].dx = 45*r*cos(theta) + dx;
 158                                         bdot[bd2].dy = 45*r*sin(theta) + dy;
 159                                         bdot[bd2].x = x + xbang;
 160                                         bdot[bd2].y = y + ybang;
 161                                         bdot[bd2].c = 0;
 162                                         bdot[bd2].life = 100;
 163                                         bdot[bd2].decay = frnd()*3 + 1;
 164                                         bdot[bd2].active = 1;
 165
 166                                         // Replace the last few bang dots with the pixels from the exploding object
 167                                         if(endcount>0) bdot[bd2].c = c;
 168
 169                                         bd2 = (bd2+1) % MAXBANGDOTS;
 170                                 }
 171                                 pixel += row_inc;
 172                         }
 173                 }
 174                 if(SDL_GetTicks() - begin_generate > 7) endcount++;
 175         }
 176
 177         SDL_UnlockSurface(s);
 178 }
 179
 180 void
 181 draw_bang_dots(SDL_Surface *s) {
 182         int i;
 183         int first_i, last_i;
 184         Uint16 *rawpixel;
 185         rawpixel = (Uint16 *) s->pixels;
 186
 187         first_i = -1;
 188         last_i = 0;
 189
 190         for(i = bd1; (bd1 <= bd2)?(i<bd2):(i >= bd1 && i < bd2); last_i = ++i) {
 191
 192                 i %= MAXBANGDOTS;
 193
 194                 if(bdot[i].x <= 0 || bdot[i].x >= XSIZE || bdot[i].y <= 0 || bdot[i].y >= YSIZE) {
 195                         // If the dot has drifted outside the perimeter, kill it
 196                         bdot[i].active = 0;
 197                 }
 198
 199                 if(bdot[i].active) {
 200                         if(first_i < 0)
 201                         first_i = i;
 202                         rawpixel[(int)(s->pitch/2*(int)(bdot[i].y)) + (int)(bdot[i].x)] = bdot[i].c ? bdot[i].c : heatcolor[(int)(bdot[i].life*3)];
 203                         bdot[i].life -= bdot[i].decay;
 204                         bdot[i].x += bdot[i].dx*t_frame - xscroll;
 205                         bdot[i].y += bdot[i].dy*t_frame - yscroll;
 206
 207                         if(bdot[i].life<0) bdot[i].active = 0;
 208                 }
 209         }
 210
 211         if(first_i >= 0) {
 212                 bd1 = first_i;
 213                 bd2 = last_i;
 214         }
 215         else {
 216                 bd1 = 0;
 217                 bd2 = 0;
 218         }
 219
 220 }
 221
 222
 223 void
 224 draw_engine_dots(SDL_Surface *s) {
 225         int i;
 226         Uint16 *rawpixel;
 227         rawpixel = (Uint16 *) s->pixels;
 228
 229         for(i = 0; i<MAXENGINEDOTS; i++) {
 230                 if(edot[i].active) {
 231                         edot[i].x += edot[i].dx*t_frame - xscroll;
 232                         edot[i].y += edot[i].dy*t_frame - yscroll;
 233                         edot[i].life -= t_frame*3;
 234                         if(edot[i].life < 0
 235                                         || edot[i].y<0 || edot[i].y >= YSIZE
 236                                         || edot[i].x<0 || edot[i].x >= XSIZE) {
 237                                 edot[i].active = 0;
 238                         } else {
 239                                 int heatindex;
 240                                 heatindex = edot[i].life * 6;
 241                                 //rawpixel[(int)(s->pitch/2*(int)(edot[i].y)) + (int)(edot[i].x)] = lifecolor[(int)(edot[i].life)];
 242                                 rawpixel[(int)(s->pitch/2*(int)(edot[i].y)) + (int)(edot[i].x)] = heatindex>3*W ? heatcolor[3*W-1] : heatcolor[heatindex];
 243                         }
 244                 }
 245         }
 246 }
 247
 248 void
 249 new_engine_dots(int n, int dir) {
 250         int i;
 251         float a, r;  // angle, random length
 252         float dx, dy;
 253         float hx, hy; // half ship width/height.
 254         static const int s[4] = { 2, 1, 0, 1 };
 255
 256         hx = surf_ship->w / 2;
 257         hy = surf_ship->h / 2;
 258
 259         for(i = 0; i<n; i++) {
 260                 if(dotptr->active == 0) {
 261                         a = frnd()*M_PI + (dir-1)*M_PI_2;
 262                         r = sin(frnd()*M_PI);
 263                         dx = r * cos(a);
 264                         dy = r * -sin(a);  // screen y is "backwards".
 265
 266                         dotptr->active = 1;
 267                         dotptr->x = shipx + s[dir]*hx + (frnd()-0.5)*3;
 268                         dotptr->y = shipy + s[(dir+1)&3]*hy + (frnd()-0.5)*3;
 269                         if(dir&1) {
 270                                 dotptr->dx = shipdx + 2*dx;
 271                                 dotptr->dy = shipdy + 20*dy;
 272                                 dotptr->life = 60 * fabs(dy);
 273                         } else {
 274                                 dotptr->dx = shipdx + 20*dx;
 275                                 dotptr->dy = shipdy + 2*dy;
 276                                 dotptr->life = 60 * fabs(dx);
 277                         }
 278
 279                         if(dotptr - edot < MAXENGINEDOTS-1) dotptr++;
 280                         else dotptr = edot;
 281                 }
 282         }
 283 }
 284
 285 void
 286 drawdots(SDL_Surface *s) {
 287         int m;
 288
 289         // Create engine dots out the side we're moving from
 290         for(m = 0; m<4; m++) {
 291                 if(jets & 1<<m) { // 'jets' is a bit field
 292                         new_engine_dots(80,m);
 293                 }
 294         }
 295
 296         move_dust();
 297
 298         SDL_LockSurface(s);
 299         draw_dust(s);
 300         draw_engine_dots(s);
 301         draw_bang_dots(s);
 302         SDL_UnlockSurface(s);
 303 }
 304
 305 int
 306 init(void) {
 307
 308         int i;
 309         SDL_Surface *temp;
 310         Uint32 flag;
 311
 312         // Where are our data files?
 313         if(!find_files()) exit(1);
 314         read_high_score_table();
 315
 316         if(opt_sound) {
 317                 // Initialize SDL with audio and video
 318                 if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) != 0) {
 319                         opt_sound = 0;
 320                         printf ("Can't open sound, starting without it\n");
 321                         atexit(SDL_Quit);
 322                 } else {
 323                         atexit(SDL_Quit);
 324                         atexit(SDL_CloseAudio);
 325                         opt_sound = init_sound();
 326                 }
 327         } else {
 328                 // Initialize with video only
 329                 CONDERROR(SDL_Init(SDL_INIT_VIDEO) != 0);
 330                 atexit(SDL_Quit);
 331         }
 332
 333         play_tune(TUNE_TITLE_PAGE);
 334
 335         // Attempt to get the required video size
 336         flag = SDL_DOUBLEBUF | SDL_HWSURFACE;
 337         if(opt_fullscreen) flag |= SDL_FULLSCREEN;
 338         surf_screen = SDL_SetVideoMode(XSIZE,YSIZE,16,flag);
 339
 340         // Set the title bar text
 341         SDL_WM_SetCaption("Variations on Rockdodger", "VoR");
 342
 343         NULLERROR(surf_screen);
 344
 345         // Set the heat color from the range 0 (cold) to 300 (blue-white)
 346         for(i = 0; i<W*3; i++) {
 347                 heatcolor[i] = SDL_MapRGB(
 348                         surf_screen->format,
 349                         (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?
 350                 );
 351         }
 352
 353         // Load the banners
 354         NULLERROR(temp = IMG_Load(add_path("banners/variations.png")));
 355         NULLERROR(surf_b_variations = SDL_DisplayFormat(temp));
 356
 357         NULLERROR(temp = IMG_Load(add_path("banners/on.png")));
 358         NULLERROR(surf_b_on = SDL_DisplayFormat(temp));
 359
 360         NULLERROR(temp = IMG_Load(add_path("banners/rockdodger.png")));
 361         NULLERROR(surf_b_rockdodger = SDL_DisplayFormat(temp));
 362
 363         NULLERROR(temp = IMG_Load(add_path("banners/game.png")));
 364         NULLERROR(surf_b_game = SDL_DisplayFormat(temp));
 365
 366         NULLERROR(temp = IMG_Load(add_path("banners/over.png")));
 367         NULLERROR(surf_b_over = SDL_DisplayFormat(temp));
 368
 369         surf_font_big = IMG_Load(add_path(BIG_FONT_FILE));
 370         g_font = SFont_InitFont(surf_font_big);
 371
 372         // Load the spaceship graphic.
 373         NULLERROR(temp = IMG_Load(add_path("sprites/ship.png")));
 374         NULLERROR(surf_ship = SDL_DisplayFormat(temp));
 375         get_shape(surf_ship, &shipshape);
 376
 377         // Load the life indicator (small ship) graphic.
 378         NULLERROR(temp = IMG_Load(add_path("indicators/life.png")));
 379         NULLERROR(surf_life = SDL_DisplayFormat(temp));
 380
 381         init_engine_dots();
 382         init_dust();
 383
 384         init_rocks();
 385
 386         // Remove the mouse cursor
 387 #ifdef SDL_DISABLE
 388         SDL_ShowCursor(SDL_DISABLE);
 389 #endif
 390
 391         return 0;
 392 }
 393
 394 int
 395 draw() {
 396         int i;
 397         SDL_Rect dest;
 398         int bang, x;
 399         char *text;
 400         float fadegame,fadeover;
 401
 402         bang = 0;
 403
 404         // Draw a fully black background
 405         SDL_FillRect(surf_screen,NULL,0);
 406
 407         // Draw the background dots
 408         drawdots(surf_screen);
 409
 410         // Draw ship
 411         if(state == GAMEPLAY ) {
 412                 dest.x = shipx;
 413                 dest.y = shipy;
 414                 SDL_BlitSurface(surf_ship,NULL,surf_screen,&dest);
 415         }
 416
 417         draw_rocks();
 418
 419         // Draw the life indicators.
 420         if(state == GAMEPLAY || state == DEAD_PAUSE || state == GAME_OVER) {
 421                 for(i = 0; i<nships-1; i++) {
 422                         dest.x = (i + 1)*(surf_life->w + 10);
 423                         dest.y = 20;
 424                         SDL_BlitSurface(surf_life, NULL, surf_screen, &dest);
 425                 }
 426         }
 427
 428         // Draw the score
 429         snprintscore_line(topline, 50, score);
 430         SFont_Write(surf_screen, g_font, XSIZE-250, 0, topline);
 431
 432         // If it's game over, show the game over graphic in the dead centre
 433         switch (state) {
 434                 case GAME_OVER:
 435                         if(fadetimer<3.0/faderate) {
 436                                 fadegame = fadetimer/(3.0/faderate);
 437                         } else {
 438                                 fadegame = 1.0;
 439                         }
 440
 441                         if(fadetimer<3.0/faderate) {
 442                                 fadeover = 0.0;
 443                         } else if(fadetimer<6.0/faderate) {
 444                                 fadeover = ((3.0/faderate)-fadetimer)/(6.0/faderate);
 445                         } else {
 446                                 fadeover = 1.0;
 447                         }
 448
 449                         dest.x = (XSIZE-surf_b_game->w)/2;
 450                         dest.y = (YSIZE-surf_b_game->h)/2-40;
 451                         SDL_SetAlpha(surf_b_game, SDL_SRCALPHA, (int)(fadegame*(200 + 55*cos(fadetimer += t_frame/1.0))));
 452                         SDL_BlitSurface(surf_b_game,NULL,surf_screen,&dest);
 453
 454                         dest.x = (XSIZE-surf_b_over->w)/2;
 455                         dest.y = (YSIZE-surf_b_over->h)/2 + 40;
 456                         SDL_SetAlpha(surf_b_over, SDL_SRCALPHA, (int)(fadeover*(200 + 55*sin(fadetimer))));
 457                         SDL_BlitSurface(surf_b_over,NULL,surf_screen,&dest);
 458                 break;
 459
 460                 case TITLE_PAGE:
 461
 462                         dest.x = (XSIZE-surf_b_variations->w)/2 + cos(fadetimer/6.5)*10;
 463                         dest.y = (YSIZE/2-surf_b_variations->h)/2 + sin(fadetimer/5.0)*10;
 464                         SDL_SetAlpha(surf_b_variations, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer += t_frame/2.0)));
 465                         SDL_BlitSurface(surf_b_variations,NULL,surf_screen,&dest);
 466
 467                         dest.x = (XSIZE-surf_b_on->w)/2 + cos((fadetimer + 1.0)/6.5)*10;
 468                         dest.y = (YSIZE/2-surf_b_on->h)/2 + surf_b_variations->h + 20 + sin((fadetimer + 1.0)/5.0)*10;
 469                         SDL_SetAlpha(surf_b_on, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-1.0)));
 470                         SDL_BlitSurface(surf_b_on,NULL,surf_screen,&dest);
 471
 472                         dest.x = (XSIZE-surf_b_rockdodger->w)/2 + cos((fadetimer + 2.0)/6.5)*10;
 473                         dest.y = (YSIZE/2-surf_b_rockdodger->h)/2 + surf_b_variations->h + surf_b_on->h + 40 + sin((fadetimer + 2.0)/5)*10;
 474                         SDL_SetAlpha(surf_b_rockdodger, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-2.0)));
 475                         SDL_BlitSurface(surf_b_rockdodger,NULL,surf_screen,&dest);
 476
 477                         text = "Version " VERSION;
 478                         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + sin(fadetimer/4.5)*10;
 479                         SFont_Write(surf_screen,g_font,x,YSIZE-50 + sin(fadetimer/2)*5,text);
 480
 481                         text = sequence[(int)(fadetimer/40)%NSEQUENCE];
 482                         //text = "Press SPACE to start!";
 483                         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + cos(fadetimer/4.5)*10;
 484                         SFont_Write(surf_screen,g_font,x,YSIZE-100 + cos(fadetimer/3)*5,text);
 485                 break;
 486
 487                 case HIGH_SCORE_ENTRY:
 488                         play_tune(TUNE_HIGH_SCORE_ENTRY);
 489                         if(!process_score_input()) {  // done inputting name
 490
 491                                 // Change state to briefly show high scores page
 492                                 state = HIGH_SCORE_DISPLAY;
 493                                 state_timeout = 200;
 494
 495                                 // Write the high score table to the file
 496                                 write_high_score_table();
 497
 498                                 play_tune(TUNE_TITLE_PAGE);
 499                         }
 500                 // FALL THROUGH TO
 501                 case HIGH_SCORE_DISPLAY:
 502                         // Display de list o high scores mon.
 503                         display_scores(surf_screen, 150,50);
 504                         break;
 505                 case GAMEPLAY:
 506                 case DEAD_PAUSE:
 507                         ; // no action necessary
 508         }
 509
 510         if(state == GAMEPLAY) {
 511                 bang = hit_rocks(shipx, shipy, &shipshape);
 512         }
 513
 514         ms_frame = SDL_GetTicks() - ms_end;
 515         ms_end += ms_frame;
 516         if(ms_frame>200 || ms_frame<0) {
 517                 // We won't run at all below 5 frames per second.
 518                 // This also happens if we were paused, grr.
 519                 t_frame = 0;
 520                 ms_frame = 0;
 521         } else {
 522                 t_frame = opt_gamespeed * ms_frame / 50;
 523                 if(state == GAMEPLAY) score += ms_frame;
 524         }
 525
 526         // Update the surface
 527         SDL_Flip(surf_screen);
 528
 529
 530         return bang;
 531 }
 532
 533 int
 534 gameloop() {
 535         Uint8 *keystate;
 536         float tmp;
 537
 538
 539         for(;;) {
 540                 if(!paused) {
 541                         // Count down the game loop timer, and change state when it gets to zero or less;
 542
 543                         if((state_timeout -= t_frame*3) < 0) {
 544                                 switch(state) {
 545                                         case DEAD_PAUSE:
 546                                                 // Create a new ship and start all over again
 547                                                 state = GAMEPLAY;
 548                                                 play_tune(TUNE_GAMEPLAY);
 549                                                 break;
 550                                         case GAME_OVER:
 551                                                 if(new_high_score(score)) {
 552                                                         SDL_Event e;
 553                                                         state = HIGH_SCORE_ENTRY;
 554                                                         state_timeout = 5.0e6;
 555                                                         SDL_EnableUNICODE(1);
 556                                                         while(SDL_PollEvent(&e))
 557                                                                 ;
 558                                                 } else if(!keystate[SDLK_SPACE]) {
 559                                                         state = HIGH_SCORE_DISPLAY;
 560                                                         state_timeout = 400;
 561                                                 }
 562                                                 break;
 563                                         case HIGH_SCORE_DISPLAY:
 564                                                 state = TITLE_PAGE;
 565                                                 state_timeout = 500.0;
 566                                                 break;
 567                                         case HIGH_SCORE_ENTRY:
 568                                                 break;
 569                                         case TITLE_PAGE:
 570                                                 state = HIGH_SCORE_DISPLAY;
 571                                                 state_timeout = 200.0;
 572                                                 break;
 573                                         case GAMEPLAY:
 574                                                 ; // no action necessary
 575                                 }
 576                         } else {
 577                                 if(state == DEAD_PAUSE) {
 578                                         float blast_radius;
 579                                         int fixonly;
 580
 581                                         if(state_timeout < DEAD_PAUSE_LENGTH - 20.0) {
 582                                                 blast_radius = BLAST_RADIUS * 1.3;
 583                                                 fixonly = 1;
 584                                         } else {
 585                                                 blast_radius = BLAST_RADIUS * (DEAD_PAUSE_LENGTH - state_timeout) / 20.0;
 586                                                 fixonly = 0;
 587                                         }
 588                                         blast_rocks(bangx, bangy, blast_radius, fixonly);
 589
 590                                         if(bangx < 60) bangx = 60;
 591                                 }
 592                         }
 593
 594                         new_rocks();
 595
 596                         // INERTIA
 597                         shipx += shipdx*t_frame;
 598                         shipy += shipdy*t_frame;
 599
 600                         // SCROLLING
 601                         tmp = (shipy-YSCROLLTO)/25 + (shipdy-screendy);
 602                         screendy += tmp * t_frame/12;
 603                         tmp = (shipx-XSCROLLTO)/25 + (shipdx-screendx);
 604                         screendx += tmp * t_frame/12;
 605                         // taper off so we don't hit the barrier abruptly.
 606                         // (if we would hit in < 2 seconds, adjust to 2 seconds).
 607                         if(back_dist + (screendx - SCREENDXMIN)*TO_TICKS(2) < 0) {
 608                                 screendx = SCREENDXMIN - (back_dist/TO_TICKS(2));
 609                         }
 610
 611                         back_dist += (screendx - SCREENDXMIN)*t_frame;
 612                         if(opt_max_lead >= 0) back_dist = min(back_dist, opt_max_lead);
 613
 614                         xscroll = screendx * t_frame;
 615                         yscroll = screendy * t_frame;
 616
 617                         shipx -= xscroll;
 618                         shipy -= yscroll;
 619
 620                         // move bang center
 621                         bangx += bangdx*t_frame - xscroll;
 622                         bangy += bangdy*t_frame - yscroll;
 623
 624                         move_rocks();
 625
 626
 627                         // BOUNCE X
 628                         if(shipx<0 || shipx>XSIZE-surf_ship->w) {
 629                                 // BOUNCE from left and right wall
 630                                 shipx -= (shipdx-screendx)*t_frame;
 631                                 shipdx = screendx - (shipdx-screendx)*opt_bounciness;
 632                         }
 633
 634                         // BOUNCE Y
 635                         if(shipy<0 || shipy>YSIZE-surf_ship->h) {
 636                                 // BOUNCE from top and bottom wall
 637                                 shipy -= (shipdy-screendy)*t_frame;
 638                                 shipdy = screendy - (shipdy-screendy)*opt_bounciness;
 639                         }
 640
 641
 642                         if(draw() && state == GAMEPLAY) {
 643                                 // Died
 644                                 play_sound(SOUND_BANG); // Play the explosion sound
 645                                 bangx = shipx; bangy = shipy; bangdx = shipdx; bangdy = shipdy;
 646                                 new_bang_dots(shipx,shipy,shipdx,shipdy,surf_ship);
 647                                 shipdx *= 0.5; shipdy *= 0.5;
 648                                 if(shipdx < SCREENDXMIN) shipdx = SCREENDXMIN;
 649                                 if(--nships <= 0) {
 650                                         state = GAME_OVER;
 651                                         shipdx = SCREENDXMIN; shipdy = 0;
 652                                         state_timeout = 200.0;
 653                                         fadetimer = 0.0;
 654                                         faderate = t_frame;
 655                                 }
 656                                 else {
 657                                         state = DEAD_PAUSE;
 658                                         state_timeout = DEAD_PAUSE_LENGTH;
 659                                 }
 660                         }
 661
 662                         SDL_PumpEvents();
 663                         keystate = SDL_GetKeyState(NULL);
 664
 665                         // new game
 666                         if(keystate[SDLK_SPACE] && (state == HIGH_SCORE_DISPLAY || state == TITLE_PAGE)) {
 667
 668                                 reset_rocks();
 669
 670                                 nships = 4;
 671                                 score = 0;
 672
 673                                 state = GAMEPLAY;
 674                                 play_tune(TUNE_GAMEPLAY);
 675
 676                                 shipx = XSIZE/2.2; shipy = YSIZE/2;
 677                                 shipdx = screendx; shipdy = screendy;
 678                         }
 679
 680                         jets = 0;
 681                 } else {
 682                         SDL_PumpEvents();
 683                         keystate = SDL_GetKeyState(NULL);
 684                 }
 685
 686                 if(state == GAMEPLAY) {
 687                         if(!paused) {
 688                                 if(keystate[SDLK_LEFT]  | keystate[SDLK_h]) { shipdx -= 1.5*t_frame; jets |= 1<<0;}
 689                                 if(keystate[SDLK_DOWN]  | keystate[SDLK_t]) { shipdy += 1.5*t_frame; jets |= 1<<1;}
 690                                 if(keystate[SDLK_RIGHT] | keystate[SDLK_n]) { shipdx += 1.5*t_frame; jets |= 1<<2;}
 691                                 if(keystate[SDLK_UP]    | keystate[SDLK_c]) { shipdy -= 1.5*t_frame; jets |= 1<<3;}
 692                                 if(keystate[SDLK_3])            { SDL_SaveBMP(surf_screen, "snapshot.bmp"); }
 693                         }
 694
 695                         if(keystate[SDLK_p] | keystate[SDLK_s]) {
 696                                 if(!pausedown) {
 697                                         paused = !paused;
 698                                         pausedown = 1;
 699                                 }
 700                         } else {
 701                                 pausedown = 0;
 702                         }
 703                 } else if(state == GAME_OVER) {
 704                         if(keystate[SDLK_SPACE]) {
 705                                 state_timeout = -1;
 706                         }
 707                 }
 708
 709                 if(state != HIGH_SCORE_ENTRY && (keystate[SDLK_q] || keystate[SDLK_ESCAPE])) {
 710                         return 0;
 711                 }
 712
 713         }
 714 }
 715
 716 int
 717 main(int argc, char **argv) {
 718         init_opts();
 719         argp_parse(&argp, argc, argv, 0, 0, 0);
 720
 721         if(init()) {
 722                 printf ("ta: '%s'\n",initerror);
 723                 return 1;
 724         }
 725
 726         gameloop();
 727
 728         return 0;
 729 }