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 #ifdef DEBUG
  34 #include "debug.h"
  35 #endif
  36
  37 #include "args.h"
  38 #include "common.h"
  39 #include "config.h"
  40 #include "file.h"
  41 #include "globals.h"
  42 #include "rocks.h"
  43 #include "score.h"
  44 #include "shape.h"
  45 #include "sound.h"
  46
  47 // ************************************* VARS
  48 // SDL_Surface global variables
  49 SDL_Surface
  50         *surf_screen,   // Screen
  51         *surf_b_variations, // "variations" banner
  52         *surf_b_on, // "on" banner
  53         *surf_b_rockdodger, // "rockdodger" banner
  54         *surf_b_game,   // Title element "game"
  55         *surf_b_over,   // Title element "over"
  56         *surf_ship,             // Spaceship element
  57         *surf_life,     // Indicator of number of ships remaining
  58         *surf_rock[NROCKS],     // THE ROCKS
  59         *surf_font_big; // The big font
  60
  61
  62 SFont_Font *g_font;
  63
  64 // Structure global variables
  65 struct enginedots edot[MAXENGINEDOTS], *dotptr = edot;
  66 struct bangdots bdot[MAXBANGDOTS], *bdotptr = bdot;
  67 struct spacedot sdot[MAXSPACEDOTS];
  68
  69 // Other global variables
  70 char topline[1024];
  71 char *initerror = "";
  72
  73
  74
  75 struct shape shipshape;
  76 float shipx = XSIZE/2, shipy = YSIZE/2; // X position, 0..XSIZE
  77 float shipdx = SCREENDXMIN, shipdy = 0.0;       // Change in X position per tick.
  78 float screendx = SCREENDXMIN, screendy = 0.0;
  79 float xscroll, yscroll;
  80 float back_dist;
  81
  82 // all movement is based on t_frame.
  83 float t_frame;  // length of this frame (in ticks = 1/20th second)
  84 float s_frame;  // length of this frame (seconds)
  85 int ms_frame;   // length of this frame (milliseconds)
  86 int ms_end;     // end of this frame (milliseconds)
  87
  88 float bangx, bangy, bangdx, bangdy;
  89
  90 int nships,score;
  91 int gameover;
  92 int jets = 0;
  93
  94 float fadetimer = 0, faderate;
  95
  96 int pausedown = 0, paused = 0;
  97
  98 // bangdot start (bd1) and end (bd2) position:
  99 int bd1 = 0, bd2 = 0;
 100
 101 enum states {
 102         TITLE_PAGE,
 103         GAMEPLAY,
 104         DEAD_PAUSE,
 105         GAME_OVER,
 106         HIGH_SCORE_ENTRY,
 107         HIGH_SCORE_DISPLAY
 108 };
 109 enum states state = TITLE_PAGE;
 110 float state_timeout = 600.0;
 111
 112 #define NSEQUENCE 2
 113 char *sequence[] = {
 114         "Press SPACE to start",
 115         "http://herkamire.com/jason/vor"
 116 };
 117
 118 int bangdotlife, nbangdots;
 119 Uint16 heatcolor[W*3];
 120
 121 char *data_dir;
 122 extern char *optarg;
 123 extern int optind, opterr, optopt;
 124
 125 #define TO_TICKS(seconds) ((seconds)*20*opt_gamespeed)
 126
 127 // ************************************* FUNCS
 128
 129 float
 130 rnd() {
 131         return (float)random()/(float)RAND_MAX;
 132 }
 133
 134 void
 135 init_engine_dots() {
 136         int i;
 137         for(i = 0; i<MAXENGINEDOTS; i++) {
 138                 edot[i].active = 0;
 139         }
 140 }
 141
 142 void
 143 init_space_dots() {
 144         int i,b;
 145         for(i = 0; i<MAXSPACEDOTS; i++) {
 146                 sdot[i].x = rnd()*(XSIZE-5);
 147                 sdot[i].y = rnd()*(YSIZE-5);
 148                 sdot[i].z = MAXDUSTDEPTH*sqrt(rnd());
 149                 b = (MAXDUSTDEPTH - sdot[i].z) * 255.0 / MAXDUSTDEPTH;
 150                 sdot[i].color = SDL_MapRGB(surf_screen->format, b, b, b);
 151         }
 152 }
 153
 154 void
 155 make_bang_dots(int xbang, int ybang, int dx, int dy, SDL_Surface *s, int power) {
 156
 157         // TODO - stop generating dots after a certain amount of time has passed, to cope with slower CPUs.
 158         // TODO - generate and display dots in a circular buffer
 159
 160         int x,y,endcount;
 161         Uint16 *rawpixel,c;
 162         double theta,r;
 163         int begin_generate;
 164
 165         begin_generate = SDL_GetTicks();
 166
 167         SDL_LockSurface(s);
 168         rawpixel = (Uint16 *) s->pixels;
 169
 170         //for(n = 0; n <= power/2; n++) {
 171
 172         endcount = 0;
 173         while (endcount<3) {
 174                 for(x = 0; x<s->w; x++) {
 175                         for(y = 0; y<s->h; y++) {
 176                                 c = rawpixel[s->pitch/2*y + x];
 177                                 if(c && c != s->format->colorkey) {
 178
 179                                         theta = rnd()*M_PI*2;
 180
 181                                         r = 1-(rnd()*rnd());
 182
 183                                         bdot[bd2].dx = (power/50.0)*45.0*cos(theta)*r + dx;
 184                                         bdot[bd2].dy = (power/50.0)*45.0*sin(theta)*r + dy;
 185                                         bdot[bd2].x = x + xbang;
 186                                         bdot[bd2].y = y + ybang;
 187
 188                                         // Replace the last few bang dots with the pixels from the exploding object
 189                                         bdot[bd2].c = (endcount>0)?c:0;
 190                                         bdot[bd2].life = 100;
 191                                         bdot[bd2].decay = rnd()*3 + 1;
 192                                         bdot[bd2].active = 1;
 193
 194                                         bd2++;
 195                                         bd2 %= MAXBANGDOTS;
 196
 197                                         // If the circular buffer is filled, who cares? They've had their chance.
 198                                         //if(bd2 == bd1-1) goto exitloop;
 199
 200                                 }
 201                         }
 202                 }
 203
 204                 if(SDL_GetTicks() - begin_generate > 7) endcount++;
 205         }
 206
 207         SDL_UnlockSurface(s);
 208
 209 }
 210
 211 void
 212 draw_bang_dots(SDL_Surface *s) {
 213         int i;
 214         int first_i, last_i;
 215         Uint16 *rawpixel;
 216         rawpixel = (Uint16 *) s->pixels;
 217
 218         first_i = -1;
 219         last_i = 0;
 220
 221         for(i = bd1; (bd1 <= bd2)?(i<bd2):(i >= bd1 && i < bd2); last_i = ++i) {
 222
 223                 i %= MAXBANGDOTS;
 224
 225                 if(bdot[i].x <= 0 || bdot[i].x >= XSIZE || bdot[i].y <= 0 || bdot[i].y >= YSIZE) {
 226                         // If the dot has drifted outside the perimeter, kill it
 227                         bdot[i].active = 0;
 228                 }
 229
 230                 if(bdot[i].active) {
 231                         if(first_i < 0)
 232                         first_i = i;
 233                         //last_i = i + 1;
 234                         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)];
 235                         bdot[i].life -= bdot[i].decay;
 236                         bdot[i].x += bdot[i].dx*t_frame - xscroll;
 237                         bdot[i].y += bdot[i].dy*t_frame - yscroll;
 238
 239                         if(bdot[i].life<0)
 240                         bdot[i].active = 0;
 241                 }
 242         }
 243
 244         if(first_i >= 0) {
 245                 bd1 = first_i;
 246                 bd2 = last_i;
 247         }
 248         else {
 249                 bd1 = 0;
 250                 bd2 = 0;
 251         }
 252
 253 }
 254
 255
 256 void
 257 draw_space_dots(SDL_Surface *s) {
 258         int i;
 259         Uint16 *rawpixel;
 260         rawpixel = (Uint16 *) s->pixels;
 261
 262         for(i = 0; i<MAXSPACEDOTS; i++) {
 263                 if(sdot[i].y<0) {
 264                         sdot[i].y = 0;
 265                 }
 266                 rawpixel[(int)(s->pitch/2*(int)sdot[i].y) + (int)(sdot[i].x)] = sdot[i].color;
 267                 sdot[i].x -= xscroll / (1.3 + sdot[i].z);
 268                 sdot[i].y -= yscroll / (1.3 + sdot[i].z);
 269                 if(sdot[i].y >= XSIZE) sdot[i].x -= XSIZE;
 270                 else if(sdot[i].x < 0) sdot[i].x = XSIZE-1;
 271                 if(sdot[i].y > YSIZE) sdot[i].y -= YSIZE;
 272                 else if(sdot[i].y < 0) sdot[i].y += YSIZE-1;
 273         }
 274 }
 275
 276 void
 277 draw_engine_dots(SDL_Surface *s) {
 278         int i;
 279         Uint16 *rawpixel;
 280         rawpixel = (Uint16 *) s->pixels;
 281
 282         for(i = 0; i<MAXENGINEDOTS; i++) {
 283                 if(edot[i].active) {
 284                         edot[i].x += edot[i].dx*t_frame - xscroll;
 285                         edot[i].y += edot[i].dy*t_frame - yscroll;
 286                         if((edot[i].life -= t_frame*3)<0 || edot[i].y<0 || edot[i].y>YSIZE) {
 287                                 edot[i].active = 0;
 288                         } else if(edot[i].x<0 || edot[i].x>XSIZE) {
 289                                 edot[i].active = 0;
 290                         } else {
 291                                 int heatindex;
 292                                 heatindex = edot[i].life * 6;
 293                                 //rawpixel[(int)(s->pitch/2*(int)(edot[i].y)) + (int)(edot[i].x)] = lifecolor[(int)(edot[i].life)];
 294                                 rawpixel[(int)(s->pitch/2*(int)(edot[i].y)) + (int)(edot[i].x)] = heatindex>3*W ? heatcolor[3*W-1] : heatcolor[heatindex];
 295                         }
 296                 }
 297         }
 298 }
 299
 300 void
 301 new_engine_dots(int n, int dir) {
 302         int i;
 303         float a, r;  // angle, random length
 304         float dx, dy;
 305         float hx, hy; // half ship width/height.
 306         static const int s[4] = { 2, 1, 0, 1 };
 307
 308         hx = surf_ship->w / 2;
 309         hy = surf_ship->h / 2;
 310
 311         for(i = 0; i<n; i++) {
 312                 if(dotptr->active == 0) {
 313                         a = rnd()*M_PI + (dir-1)*M_PI_2;
 314                         r = sin(rnd()*M_PI);
 315                         dx = r * cos(a);
 316                         dy = r * -sin(a);  // screen y is "backwards".
 317
 318                         dotptr->active = 1;
 319                         dotptr->x = shipx + s[dir]*hx + (rnd()-0.5)*3;
 320                         dotptr->y = shipy + s[(dir+1)&3]*hy + (rnd()-0.5)*3;
 321                         if(dir&1) {
 322                                 dotptr->dx = shipdx + 2*dx;
 323                                 dotptr->dy = shipdy + 20*dy;
 324                                 dotptr->life = 60 * fabs(dy);
 325                         } else {
 326                                 dotptr->dx = shipdx + 20*dx;
 327                                 dotptr->dy = shipdy + 2*dy;
 328                                 dotptr->life = 60 * fabs(dx);
 329                         }
 330
 331                         dotptr++;
 332                         if(dotptr-edot >= MAXENGINEDOTS) {
 333                                 dotptr = edot;
 334                         }
 335                 }
 336         }
 337 }
 338
 339 void
 340 drawdots(SDL_Surface *s) {
 341         int m;
 342
 343         // Create engine dots out the side we're moving from
 344         for(m = 0; m<4; m++) {
 345                 if(jets & 1<<m) { // 'jets' is a bit field
 346                         new_engine_dots(80,m);
 347                 }
 348         }
 349
 350         SDL_LockSurface(s);
 351         draw_space_dots(s);
 352         draw_engine_dots(s);
 353         draw_bang_dots(s);
 354         SDL_UnlockSurface(s);
 355 }
 356
 357 int
 358 init(void) {
 359
 360         int i;
 361         SDL_Surface *temp;
 362         Uint32 flag;
 363
 364         // Where are our data files?
 365         if(!find_files()) exit(1);
 366         read_high_score_table();
 367
 368         if(opt_sound) {
 369                 // Initialize SDL with audio and video
 370                 if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) != 0) {
 371                         opt_sound = 0;
 372                         printf ("Can't open sound, starting without it\n");
 373                         atexit(SDL_Quit);
 374                 } else {
 375                         atexit(SDL_Quit);
 376                         atexit(SDL_CloseAudio);
 377                         opt_sound = init_sound();
 378                 }
 379         } else {
 380                 // Initialize with video only
 381                 CONDERROR(SDL_Init(SDL_INIT_VIDEO) != 0);
 382                 atexit(SDL_Quit);
 383         }
 384
 385         play_tune(0);
 386
 387         // Attempt to get the required video size
 388         flag = SDL_DOUBLEBUF | SDL_HWSURFACE;
 389         if(opt_fullscreen) flag |= SDL_FULLSCREEN;
 390         surf_screen = SDL_SetVideoMode(XSIZE,YSIZE,16,flag);
 391
 392         // Set the title bar text
 393         SDL_WM_SetCaption("Variations on Rockdodger", "VoR");
 394
 395         NULLERROR(surf_screen);
 396
 397         // Set the heat color from the range 0 (cold) to 300 (blue-white)
 398         for(i = 0; i<W*3; i++) {
 399                 heatcolor[i] = SDL_MapRGB(
 400                         surf_screen->format,
 401                         (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?
 402                 );
 403         }
 404
 405         // Load the banners
 406         NULLERROR(temp = IMG_Load(add_path("banners/variations.png")));
 407         NULLERROR(surf_b_variations = SDL_DisplayFormat(temp));
 408
 409         NULLERROR(temp = IMG_Load(add_path("banners/on.png")));
 410         NULLERROR(surf_b_on = SDL_DisplayFormat(temp));
 411
 412         NULLERROR(temp = IMG_Load(add_path("banners/rockdodger.png")));
 413         NULLERROR(surf_b_rockdodger = SDL_DisplayFormat(temp));
 414
 415         NULLERROR(temp = IMG_Load(add_path("banners/game.png")));
 416         NULLERROR(surf_b_game = SDL_DisplayFormat(temp));
 417
 418         NULLERROR(temp = IMG_Load(add_path("banners/over.png")));
 419         NULLERROR(surf_b_over = SDL_DisplayFormat(temp));
 420
 421         surf_font_big = IMG_Load(add_path(BIG_FONT_FILE));
 422         g_font = SFont_InitFont(surf_font_big);
 423
 424         // Load the spaceship graphic.
 425         NULLERROR(temp = IMG_Load(add_path("sprites/ship.png")));
 426         NULLERROR(surf_ship = SDL_DisplayFormat(temp));
 427         get_shape(surf_ship, &shipshape);
 428
 429         // Load the life indicator (small ship) graphic.
 430         NULLERROR(temp = IMG_Load(add_path("indicators/life.png")));
 431         NULLERROR(surf_life = SDL_DisplayFormat(temp));
 432
 433         init_engine_dots();
 434         init_space_dots();
 435
 436         init_rocks();
 437
 438         // Remove the mouse cursor
 439 #ifdef SDL_DISABLE
 440         SDL_ShowCursor(SDL_DISABLE);
 441 #endif
 442
 443         return 0;
 444 }
 445
 446 int
 447 draw() {
 448         int i;
 449         SDL_Rect dest;
 450         int bang, x;
 451         char *text;
 452         float fadegame,fadeover;
 453
 454         bang = 0;
 455
 456         // Draw a fully black background
 457         SDL_FillRect(surf_screen,NULL,0);
 458
 459         // Draw the background dots
 460         drawdots(surf_screen);
 461
 462         // Draw ship
 463         if(!gameover && state == GAMEPLAY ) {
 464                 dest.x = shipx;
 465                 dest.y = shipy;
 466                 SDL_BlitSurface(surf_ship,NULL,surf_screen,&dest);
 467         }
 468
 469         draw_rocks();
 470
 471         // Draw the life indicators.
 472         if(state == GAMEPLAY || state == DEAD_PAUSE || state == GAME_OVER)
 473         for(i = 0; i<nships-1; i++) {
 474                 dest.x = (i + 1)*(surf_life->w + 10);
 475                 dest.y = 20;
 476                 SDL_BlitSurface(surf_life, NULL, surf_screen, &dest);
 477         }
 478
 479         // Draw the score
 480         snprintscore_line(topline, 50, score);
 481         SFont_Write(surf_screen, g_font, XSIZE-250, 0, topline);
 482
 483         // If it's game over, show the game over graphic in the dead centre
 484         switch (state) {
 485                 case GAME_OVER:
 486                         if(fadetimer<3.0/faderate) {
 487                                 fadegame = fadetimer/(3.0/faderate);
 488                         } else {
 489                                 fadegame = 1.0;
 490                         }
 491
 492                         if(fadetimer<3.0/faderate) {
 493                                 fadeover = 0.0;
 494                         } else if(fadetimer<6.0/faderate) {
 495                                 fadeover = ((3.0/faderate)-fadetimer)/(6.0/faderate);
 496                         } else {
 497                                 fadeover = 1.0;
 498                         }
 499
 500                         dest.x = (XSIZE-surf_b_game->w)/2;
 501                         dest.y = (YSIZE-surf_b_game->h)/2-40;
 502                         SDL_SetAlpha(surf_b_game, SDL_SRCALPHA, (int)(fadegame*(200 + 55*cos(fadetimer += t_frame/1.0))));
 503                         SDL_BlitSurface(surf_b_game,NULL,surf_screen,&dest);
 504
 505                         dest.x = (XSIZE-surf_b_over->w)/2;
 506                         dest.y = (YSIZE-surf_b_over->h)/2 + 40;
 507                         SDL_SetAlpha(surf_b_over, SDL_SRCALPHA, (int)(fadeover*(200 + 55*sin(fadetimer))));
 508                         SDL_BlitSurface(surf_b_over,NULL,surf_screen,&dest);
 509                 break;
 510
 511                 case TITLE_PAGE:
 512
 513                         dest.x = (XSIZE-surf_b_variations->w)/2 + cos(fadetimer/6.5)*10;
 514                         dest.y = (YSIZE/2-surf_b_variations->h)/2 + sin(fadetimer/5.0)*10;
 515                         SDL_SetAlpha(surf_b_variations, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer += t_frame/2.0)));
 516                         SDL_BlitSurface(surf_b_variations,NULL,surf_screen,&dest);
 517
 518                         dest.x = (XSIZE-surf_b_on->w)/2 + cos((fadetimer + 1.0)/6.5)*10;
 519                         dest.y = (YSIZE/2-surf_b_on->h)/2 + surf_b_variations->h + 20 + sin((fadetimer + 1.0)/5.0)*10;
 520                         SDL_SetAlpha(surf_b_on, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-1.0)));
 521                         SDL_BlitSurface(surf_b_on,NULL,surf_screen,&dest);
 522
 523                         dest.x = (XSIZE-surf_b_rockdodger->w)/2 + cos((fadetimer + 2.0)/6.5)*10;
 524                         dest.y = (YSIZE/2-surf_b_rockdodger->h)/2 + surf_b_variations->h + surf_b_on->h + 40 + sin((fadetimer + 2.0)/5)*10;
 525                         SDL_SetAlpha(surf_b_rockdodger, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-2.0)));
 526                         SDL_BlitSurface(surf_b_rockdodger,NULL,surf_screen,&dest);
 527
 528                         text = "Version " VERSION;
 529                         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + sin(fadetimer/4.5)*10;
 530                         SFont_Write(surf_screen,g_font,x,YSIZE-50 + sin(fadetimer/2)*5,text);
 531
 532                         text = sequence[(int)(fadetimer/40)%NSEQUENCE];
 533                         //text = "Press SPACE to start!";
 534                         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + cos(fadetimer/4.5)*10;
 535                         SFont_Write(surf_screen,g_font,x,YSIZE-100 + cos(fadetimer/3)*5,text);
 536                 break;
 537
 538                 case HIGH_SCORE_ENTRY:
 539                         play_tune(2);
 540                         if(!process_score_input()) {  // done inputting name
 541
 542                                 // Change state to briefly show high scores page
 543                                 state = HIGH_SCORE_DISPLAY;
 544                                 state_timeout = 200;
 545
 546                                 // Write the high score table to the file
 547                                 write_high_score_table();
 548
 549                                 // Play the title page tune
 550                                 play_tune(0);
 551                         }
 552                 // FALL THROUGH TO
 553                 case HIGH_SCORE_DISPLAY:
 554                         // Display de list o high scores mon.
 555                         display_scores(surf_screen, 150,50);
 556                         break;
 557                 case GAMEPLAY:
 558                 case DEAD_PAUSE:
 559                         ; // no action necessary
 560         }
 561
 562         if(!gameover && state == GAMEPLAY) {
 563                 bang = hit_rocks(shipx, shipy, &shipshape);
 564         }
 565
 566         ms_frame = SDL_GetTicks() - ms_end;
 567         ms_end += ms_frame;
 568         if(ms_frame>200 || ms_frame<0) {
 569                 // We won't run at all below 5 frames per second.
 570                 // This also happens if we were paused, grr.
 571                 s_frame = 0;
 572                 ms_frame = 0;
 573         } else {
 574                 s_frame = opt_gamespeed * ms_frame / 1000;
 575                 if(state == GAMEPLAY) score += ms_frame;
 576         }
 577         t_frame = s_frame * 20;
 578
 579         // Update the surface
 580         SDL_Flip(surf_screen);
 581
 582
 583         return bang;
 584 }
 585
 586 int
 587 gameloop() {
 588         Uint8 *keystate;
 589         float tmp;
 590
 591
 592         for(;;) {
 593                 if(!paused) {
 594                         // Count down the game loop timer, and change state when it gets to zero or less;
 595
 596                         if((state_timeout -= t_frame*3) < 0) {
 597                                 switch(state) {
 598                                         case DEAD_PAUSE:
 599                                                 // Create a new ship and start all over again
 600                                                 state = GAMEPLAY;
 601                                                 play_tune(1);
 602                                                 break;
 603                                         case GAME_OVER:
 604                                                 if(new_high_score(score)) {
 605                                                         SDL_Event e;
 606                                                         state = HIGH_SCORE_ENTRY;
 607                                                         state_timeout = 5.0e6;
 608                                                         SDL_EnableUNICODE(1);
 609                                                         while(SDL_PollEvent(&e))
 610                                                                 ;
 611                                                 } else if(!keystate[SDLK_SPACE]) {
 612                                                         state = HIGH_SCORE_DISPLAY;
 613                                                         state_timeout = 400;
 614                                                 }
 615                                                 break;
 616                                         case HIGH_SCORE_DISPLAY:
 617                                                 state = TITLE_PAGE;
 618                                                 state_timeout = 500.0;
 619                                                 break;
 620                                         case HIGH_SCORE_ENTRY:
 621                                                 // state = TITLE_PAGE;
 622                                                 // play_tune(1);
 623                                                 // state_timeout = 100.0;
 624                                                 break;
 625                                         case TITLE_PAGE:
 626                                                 state = HIGH_SCORE_DISPLAY;
 627                                                 state_timeout = 200.0;
 628                                                 break;
 629                                         case GAMEPLAY:
 630                                                 ; // no action necessary
 631                                 }
 632                         } else {
 633                                 if(state == DEAD_PAUSE) {
 634                                         float blast_radius;
 635                                         int fixonly;
 636
 637                                         if(state_timeout < DEAD_PAUSE_LENGTH - 20.0) {
 638                                                 blast_radius = BLAST_RADIUS * 1.3;
 639                                                 fixonly = 1;
 640                                         } else {
 641                                                 blast_radius = BLAST_RADIUS * (DEAD_PAUSE_LENGTH - state_timeout) / 20.0;
 642                                                 fixonly = 0;
 643                                         }
 644                                         blast_rocks(bangx, bangy, blast_radius, fixonly);
 645
 646                                         if(bangx < 60) bangx = 60;
 647                                 }
 648                         }
 649
 650                         new_rocks();
 651
 652                         // INERTIA
 653                         shipx += shipdx*t_frame;
 654                         shipy += shipdy*t_frame;
 655
 656                         // SCROLLING
 657                         tmp = shipy - (YSIZE / 2);
 658                         tmp += shipdy * 25;
 659                         tmp /= -25;
 660                         tmp = ((screendy * (t_frame - 12)) + (tmp * t_frame)) / 12;
 661                         screendy = -tmp;
 662                         tmp = shipx - (XSIZE / 3);
 663                         tmp += shipdx * 25;
 664                         tmp /= -25;
 665                         tmp = ((screendx * (t_frame - 12)) + (tmp * t_frame)) / 12;
 666                         screendx = -tmp;
 667
 668                         // taper off if we would hit the barrier in under 2 seconds.
 669                         if(back_dist + (screendx - SCREENDXMIN)*TO_TICKS(2) < 0) {
 670                                 screendx = SCREENDXMIN - (back_dist/TO_TICKS(2));
 671                         }
 672
 673                         xscroll = screendx * t_frame;
 674                         yscroll = screendy * t_frame;
 675                         back_dist += (screendx - SCREENDXMIN)*t_frame;
 676                         if(opt_max_lead >= 0) back_dist = min(back_dist, opt_max_lead);
 677
 678                         shipx -= xscroll;
 679                         shipy -= yscroll;
 680
 681                         // move bang center
 682                         bangx += bangdx*t_frame - xscroll;
 683                         bangy += bangdy*t_frame - yscroll;
 684
 685                         move_rocks();
 686
 687
 688                         // BOUNCE X
 689                         if(shipx<0 || shipx>XSIZE-surf_ship->w) {
 690                                 // BOUNCE from left and right wall
 691                                 shipx -= (shipdx-screendx)*t_frame;
 692                                 shipdx = screendx - (shipdx-screendx)*opt_bounciness;
 693                         }
 694
 695                         // BOUNCE Y
 696                         if(shipy<0 || shipy>YSIZE-surf_ship->h) {
 697                                 // BOUNCE from top and bottom wall
 698                                 shipy -= (shipdy-screendy)*t_frame;
 699                                 shipdy = screendy - (shipdy-screendy)*opt_bounciness;
 700                         }
 701
 702
 703                         if(draw() && state == GAMEPLAY) {
 704                                 // Died
 705                                 play_sound(0); // Play the explosion sound
 706                                 bangx = shipx; bangy = shipy; bangdx = shipdx; bangdy = shipdy;
 707                                 make_bang_dots(shipx,shipy,shipdx,shipdy,surf_ship,30);
 708                                 shipdx *= 0.5; shipdy *= 0.5;
 709                                 if(shipdx < SCREENDXMIN) shipdx = SCREENDXMIN;
 710                                 if(--nships <= 0) {
 711                                         state = GAME_OVER;
 712                                         gameover = 1;
 713                                         shipdx = 8; shipdy = 0;
 714                                         state_timeout = 200.0;
 715                                         fadetimer = 0.0;
 716                                         faderate = t_frame;
 717                                 }
 718                                 else {
 719                                         state = DEAD_PAUSE;
 720                                         state_timeout = DEAD_PAUSE_LENGTH;
 721                                 }
 722                         }
 723
 724                         SDL_PumpEvents();
 725                         keystate = SDL_GetKeyState(NULL);
 726
 727                         // new game
 728                         if(keystate[SDLK_SPACE] && (state == HIGH_SCORE_DISPLAY || state == TITLE_PAGE)) {
 729
 730                                 reset_rocks();
 731
 732                                 nships = 4;
 733                                 score = 0;
 734
 735                                 state = GAMEPLAY;
 736                                 play_tune(1);
 737
 738                                 gameover = 0;
 739                                 shipx = XSIZE/2.2; shipy = YSIZE/2;
 740                                 shipdx = screendx; shipdy = screendy;
 741                         }
 742
 743                         jets = 0;
 744                 } else {
 745                         SDL_PumpEvents();
 746                         keystate = SDL_GetKeyState(NULL);
 747                 }
 748
 749                 if(state == GAMEPLAY) {
 750                         if(!gameover) {
 751
 752                                 if(!paused) {
 753                                         if(keystate[SDLK_LEFT]  | keystate[SDLK_h]) { shipdx -= 1.5*t_frame; jets |= 1<<0;}
 754                                         if(keystate[SDLK_DOWN]  | keystate[SDLK_t]) { shipdy += 1.5*t_frame; jets |= 1<<1;}
 755                                         if(keystate[SDLK_RIGHT] | keystate[SDLK_n]) { shipdx += 1.5*t_frame; jets |= 1<<2;}
 756                                         if(keystate[SDLK_UP]    | keystate[SDLK_c]) { shipdy -= 1.5*t_frame; jets |= 1<<3;}
 757                                         if(keystate[SDLK_3])            { SDL_SaveBMP(surf_screen, "snapshot.bmp"); }
 758                                 }
 759
 760                                 if(keystate[SDLK_p] | keystate[SDLK_s]) {
 761                                         if(!pausedown) {
 762                                                 paused = !paused;
 763                                                 pausedown = 1;
 764                                         }
 765                                 } else {
 766                                         pausedown = 0;
 767                                 }
 768
 769                         }
 770                         else {
 771                                 paused = 0;
 772                                 pausedown = 0;
 773                         }
 774                 } else if(state == GAME_OVER) {
 775                         if(keystate[SDLK_SPACE]) {
 776                                 state_timeout = -1;
 777                         }
 778                 }
 779
 780                 if(state != HIGH_SCORE_ENTRY && (keystate[SDLK_q] || keystate[SDLK_ESCAPE])) {
 781                         return 0;
 782                 }
 783
 784         }
 785 }
 786
 787 int
 788 main(int argc, char **argv) {
 789         init_opts();
 790         argp_parse(&argp, argc, argv, 0, 0, 0);
 791
 792         if(init()) {
 793                 printf ("ta: '%s'\n",initerror);
 794                 return 1;
 795         }
 796
 797         reset_rocks();
 798         gameloop();
 799
 800         return 0;
 801 }