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 #ifdef DEBUG
  23 #include "debug.h"
  24 #endif
  25
  26 #include "config.h"
  27 #include "file.h"
  28 #include "globals.h"
  29 #include "rocks.h"
  30 #include "score.h"
  31 #include "shape.h"
  32 #include "sound.h"
  33
  34 #include <math.h>
  35 #include <SDL/SDL.h>
  36 #include <SDL/SDL_image.h>
  37 #include <stdarg.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <unistd.h>
  42
  43 #include "SFont.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 SFont_Font *g_font;
  60
  61 // Structure global variables
  62 struct enginedots edot[MAXENGINEDOTS], *dotptr = edot;
  63 struct bangdots bdot[MAXBANGDOTS], *bdotptr = bdot;
  64 struct spacedot sdot[MAXSPACEDOTS];
  65
  66 // Other global variables
  67 char topline[1024];
  68 char *initerror = "";
  69
  70 struct shape shipshape;
  71 float shipx,shipy = 240.0;      // X position, 0..XSIZE
  72 float shipdx,shipdy;    // Change in X position per tick.
  73 float gamerate;  // this controls the speed of everything that moves.
  74 float yscroll;
  75 float scrollvel;
  76
  77 int nships,score,initticks,ticks_since_last, last_ticks;
  78 int gameover;
  79 int maneuver = 0;
  80 int sound_flag, music_flag;
  81 int tail_plume; // display big engine at the back?
  82 int friction;   // should there be friction?
  83 float fadetimer = 0, faderate;
  84
  85 int pausedown = 0, paused = 0;
  86
  87 // bangdot start (bd1) and end (bd2) position:
  88 int bd1 = 0, bd2 = 0;
  89
  90 enum states {
  91         TITLE_PAGE,
  92         GAMEPLAY,
  93         DEAD_PAUSE,
  94         GAME_OVER,
  95         HIGH_SCORE_ENTRY,
  96         HIGH_SCORE_DISPLAY
  97 };
  98 enum states state = TITLE_PAGE;
  99 float state_timeout = 600.0;
 100
 101 #define NSEQUENCE 2
 102 char *sequence[] = {
 103         "Press SPACE to start",
 104         "http://qualdan.com/vor/"
 105 };
 106
 107 int bangdotlife, nbangdots;
 108 Uint16 heatcolor[W*3];
 109
 110 char *data_dir;
 111 extern char *optarg;
 112 extern int optind, opterr, optopt;
 113
 114 // ************************************* FUNCS
 115
 116 float
 117 rnd() {
 118         return (float)random()/(float)RAND_MAX;
 119 }
 120
 121 void
 122 init_engine_dots() {
 123         int i;
 124         for(i = 0; i<MAXENGINEDOTS; i++) {
 125                 edot[i].active = 0;
 126         }
 127 }
 128
 129 void
 130 init_space_dots() {
 131         int i,intensity;
 132         for(i = 0; i<MAXSPACEDOTS; i++) {
 133                 float r;
 134
 135                 sdot[i].x = rnd()*(XSIZE-5);
 136                 sdot[i].y = rnd()*(YSIZE-5);
 137
 138                 r = rnd()*rnd();
 139
 140                 sdot[i].dx = -r*4;
 141                 // -1/((1-r) + .3);
 142                 intensity = (int)(r*180 + 70);
 143                 sdot[i].color = SDL_MapRGB(surf_screen->format,intensity,intensity,intensity);
 144
 145         }
 146 }
 147
 148 void
 149 makebangdots(int xbang, int ybang, int dx, int dy, SDL_Surface *s, int power) {
 150
 151         // TODO - stop generating dots after a certain amount of time has passed, to cope with slower CPUs.
 152         // TODO - generate and display dots in a circular buffer
 153
 154         int x,y,endcount;
 155         Uint16 *rawpixel,c;
 156         double theta,r;
 157         int begin_generate;
 158
 159         begin_generate = SDL_GetTicks();
 160
 161         SDL_LockSurface(s);
 162         rawpixel = (Uint16 *) s->pixels;
 163
 164         //for(n = 0; n <= power/2; n++) {
 165
 166         endcount = 0;
 167         while (endcount<3) {
 168                 for(x = 0; x<s->w; x++) {
 169                         for(y = 0; y<s->h; y++) {
 170                                 c = rawpixel[s->pitch/2*y + x];
 171                                 if(c && c != s->format->colorkey) {
 172
 173                                         theta = rnd()*M_PI*2;
 174
 175                                         r = 1-(rnd()*rnd());
 176
 177                                         bdot[bd2].dx = (power/50.0)*45.0*cos(theta)*r + dx;
 178                                         bdot[bd2].dy = (power/50.0)*45.0*sin(theta)*r + dy;
 179                                         bdot[bd2].x = x + xbang;
 180                                         bdot[bd2].y = y + ybang;
 181
 182                                         // Replace the last few bang dots with the pixels from the exploding object
 183                                         bdot[bd2].c = (endcount>0)?c:0;
 184                                         bdot[bd2].life = 100;
 185                                         bdot[bd2].decay = rnd()*3 + 1;
 186                                         bdot[bd2].active = 1;
 187
 188                                         bd2++;
 189                                         bd2 %= MAXBANGDOTS;
 190
 191                                         // If the circular buffer is filled, who cares? They've had their chance.
 192                                         //if(bd2 == bd1-1) goto exitloop;
 193
 194                                 }
 195                         }
 196                 }
 197
 198                 if(SDL_GetTicks() - begin_generate > 7) endcount++;
 199         }
 200
 201         SDL_UnlockSurface(s);
 202
 203 }
 204
 205 void
 206 draw_bang_dots(SDL_Surface *s) {
 207         int i;
 208         int first_i, last_i;
 209         Uint16 *rawpixel;
 210         rawpixel = (Uint16 *) s->pixels;
 211
 212         first_i = -1;
 213
 214         for(i = bd1; (bd1 <= bd2)?(i<bd2):(i >= bd1 && i < bd2); last_i = ++i) {
 215
 216                 i %= MAXBANGDOTS;
 217
 218                 if(bdot[i].x <= 0 || bdot[i].x >= XSIZE || bdot[i].y <= 0 || bdot[i].y >= YSIZE) {
 219                         // If the dot has drifted outside the perimeter, kill it
 220                         bdot[i].active = 0;
 221                 }
 222
 223                 if(bdot[i].active) {
 224                         if(first_i < 0)
 225                         first_i = i;
 226                         //last_i = i + 1;
 227                         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)];
 228                         bdot[i].life -= bdot[i].decay;
 229                         bdot[i].x += bdot[i].dx*gamerate;
 230                         bdot[i].y += bdot[i].dy*gamerate + yscroll;
 231
 232                         if(bdot[i].life<0)
 233                         bdot[i].active = 0;
 234                 }
 235         }
 236
 237         if(first_i >= 0) {
 238                 bd1 = first_i;
 239                 bd2 = last_i;
 240         }
 241         else {
 242                 bd1 = 0;
 243                 bd2 = 0;
 244         }
 245
 246 }
 247
 248
 249 void
 250 draw_space_dots(SDL_Surface *s) {
 251         int i;
 252         Uint16 *rawpixel;
 253         rawpixel = (Uint16 *) s->pixels;
 254
 255         for(i = 0; i<MAXSPACEDOTS; i++) {
 256                 if(sdot[i].y<0) {
 257                         sdot[i].y = 0;
 258                 }
 259                 rawpixel[(int)(s->pitch/2*(int)sdot[i].y) + (int)(sdot[i].x)] = sdot[i].color;
 260                 sdot[i].x += sdot[i].dx*gamerate;
 261                 sdot[i].y += yscroll;
 262                 if(sdot[i].y > YSIZE) {
 263                         sdot[i].y -= YSIZE;
 264                 } else if(sdot[i].y < 0) {
 265                         sdot[i].y += YSIZE;
 266                 }
 267                 if(sdot[i].x<0) {
 268                         sdot[i].x = XSIZE;
 269                 }
 270         }
 271 }
 272
 273 void
 274 draw_engine_dots(SDL_Surface *s) {
 275         int i;
 276         Uint16 *rawpixel;
 277         rawpixel = (Uint16 *) s->pixels;
 278
 279         for(i = 0; i<MAXENGINEDOTS; i++) {
 280                 if(edot[i].active) {
 281                         edot[i].x += edot[i].dx*gamerate;
 282                         edot[i].y += edot[i].dy*gamerate + yscroll;
 283                         if((edot[i].life -= gamerate*3)<0 || edot[i].y<0 || edot[i].y>YSIZE) {
 284                                 edot[i].active = 0;
 285                         } else if(edot[i].x<0 || edot[i].x>XSIZE) {
 286                                 edot[i].active = 0;
 287                         } else {
 288                                 int heatindex;
 289                                 heatindex = edot[i].life * 6;
 290                                 //rawpixel[(int)(s->pitch/2*(int)(edot[i].y)) + (int)(edot[i].x)] = lifecolor[(int)(edot[i].life)];
 291                                 rawpixel[(int)(s->pitch/2*(int)(edot[i].y)) + (int)(edot[i].x)] = heatindex>3*W ? heatcolor[3*W-1] : heatcolor[heatindex];
 292                         }
 293                 }
 294         }
 295 }
 296
 297 void
 298 create_engine_dots(int newdots) {
 299         int i;
 300         double theta,r,dx,dy;
 301
 302         if(!tail_plume) return;
 303
 304         if(state == GAMEPLAY) {
 305                 for(i = 0; i<newdots*gamerate; i++) {
 306                         if(dotptr->active == 0) {
 307                                 theta = rnd()*M_PI*2;
 308                                 r = rnd();
 309                                 dx = cos(theta)*r;
 310                                 dy = sin(theta)*r;
 311
 312                                 dotptr->active = 1;
 313                                 dotptr->x = shipx + surf_ship->w/2-14;
 314                                 dotptr->y = shipy + surf_ship->h/2 + (rnd()-0.5)*5-1;
 315                                 dotptr->dx = 10*(dx-1.5) + shipdx;
 316                                 dotptr->dy = 1*dy + shipdy;
 317                                 dotptr->life = 45 + rnd(1)*5;
 318
 319                                 dotptr++;
 320                                 if(dotptr-edot >= MAXENGINEDOTS) {
 321                                         dotptr = edot;
 322                                 }
 323                         }
 324                 }
 325         }
 326 }
 327
 328 void
 329 create_engine_dots2(int newdots, int m) {
 330         int i;
 331         double theta, theta2, dx, dy, adx, ady;
 332
 333         // Don't create fresh engine dots when
 334         // the game is not being played and a demo is not beng shown
 335         if(state != GAMEPLAY) return;
 336
 337         for(i = 0; i<newdots; i++) {
 338                 if(dotptr->active == 0) {
 339                         theta = rnd()*M_PI*2;
 340                         theta2 = rnd()*M_PI*2;
 341
 342                         dx = cos(theta) * fabs(cos(theta2));
 343                         dy = sin(theta) * fabs(cos(theta2));
 344                         adx = fabs(dx);
 345                         ady = fabs(dy);
 346
 347
 348                         dotptr->active = 1;
 349                         dotptr->x = shipx + surf_ship->w/2 + (rnd()-0.5)*3;
 350                         dotptr->y = shipy + surf_ship->h/2 + (rnd()-0.5)*3;
 351
 352                         switch(m) {
 353                                 case 0:
 354                                         dotptr->x -= 14;
 355                                         dotptr->dx = -20*adx + shipdx;
 356                                         dotptr->dy = 2*dy + shipdy;
 357                                         dotptr->life = 60 * adx;
 358                                 break;
 359                                 case 1:
 360                                         dotptr->dx = 2*dx + shipdx;
 361                                         dotptr->dy = -20*ady + shipdy;
 362                                         dotptr->life = 60 * ady;
 363                                 break;
 364                                 case 2:
 365                                         dotptr->x += 14;
 366                                         dotptr->dx = 20*adx + shipdx;
 367                                         dotptr->dy = 2*dy + shipdy;
 368                                         dotptr->life = 60 * adx;
 369                                 break;
 370                                 case 3:
 371                                         dotptr->dx = 2*dx + shipdx;
 372                                         dotptr->dy = 20*ady + shipdy;
 373                                         dotptr->life = 60 * ady;
 374                                 break;
 375                         }
 376                         dotptr++;
 377                         if(dotptr-edot >= MAXENGINEDOTS) {
 378                                 dotptr = edot;
 379                         }
 380                 }
 381         }
 382 }
 383
 384 void
 385 drawdots(SDL_Surface *s) {
 386         int m;
 387
 388         // Create more engine dots comin' out da back
 389         if(!gameover) create_engine_dots(200);
 390
 391         // Create engine dots out the side we're moving from
 392         for(m = 0; m<4; m++) {
 393                 if(maneuver & 1<<m) { // 'maneuver' is a bit field
 394                         create_engine_dots2(80,m);
 395                 }
 396         }
 397
 398         SDL_LockSurface(s);
 399         draw_space_dots(s);
 400         draw_engine_dots(s);
 401         draw_bang_dots(s);
 402         SDL_UnlockSurface(s);
 403 }
 404
 405 int
 406 init(int fullscreen) {
 407
 408         int i;
 409         SDL_Surface *temp;
 410         Uint32 flag;
 411
 412         // Where are our data files?
 413         if(!find_files()) exit(1);
 414         read_high_score_table();
 415
 416         if(sound_flag) {
 417                 // Initialize SDL with audio and video
 418                 if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) != 0) {
 419                         sound_flag = 0;
 420                         printf ("Can't open sound, starting without it\n");
 421                         atexit(SDL_Quit);
 422                 } else {
 423                         atexit(SDL_Quit);
 424                         atexit(SDL_CloseAudio);
 425                         sound_flag = init_sound();
 426                 }
 427         } else {
 428                 // Initialize with video only
 429                 CONDERROR(SDL_Init(SDL_INIT_VIDEO) != 0);
 430                 atexit(SDL_Quit);
 431         }
 432
 433         play_tune(0);
 434
 435         // Attempt to get the required video size
 436         flag = SDL_DOUBLEBUF | SDL_HWSURFACE;
 437         if(fullscreen) flag |= SDL_FULLSCREEN;
 438         surf_screen = SDL_SetVideoMode(XSIZE,YSIZE,16,flag);
 439
 440         // Set the title bar text
 441         SDL_WM_SetCaption("Variations on Rockdodger", "VoR");
 442
 443         NULLERROR(surf_screen);
 444
 445         // Set the heat color from the range 0 (cold) to 300 (blue-white)
 446         for(i = 0; i<W*3; i++) {
 447                 heatcolor[i] = SDL_MapRGB(
 448                         surf_screen->format,
 449                         (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?
 450                 );
 451         }
 452
 453         // Load the banners
 454         NULLERROR(temp = IMG_Load(add_path("banners/variations.png")));
 455         NULLERROR(surf_b_variations = SDL_DisplayFormat(temp));
 456
 457         NULLERROR(temp = IMG_Load(add_path("banners/on.png")));
 458         NULLERROR(surf_b_on = SDL_DisplayFormat(temp));
 459
 460         NULLERROR(temp = IMG_Load(add_path("banners/rockdodger.png")));
 461         NULLERROR(surf_b_rockdodger = SDL_DisplayFormat(temp));
 462
 463         NULLERROR(temp = IMG_Load(add_path("banners/game.png")));
 464         NULLERROR(surf_b_game = SDL_DisplayFormat(temp));
 465
 466         NULLERROR(temp = IMG_Load(add_path("banners/over.png")));
 467         NULLERROR(surf_b_over = SDL_DisplayFormat(temp));
 468
 469         surf_font_big = IMG_Load(add_path(BIG_FONT_FILE));
 470         g_font = SFont_InitFont(surf_font_big);
 471
 472         // Load the spaceship graphic.
 473         NULLERROR(temp = IMG_Load(add_path("sprites/ship.png")));
 474         NULLERROR(surf_ship = SDL_DisplayFormat(temp));
 475         get_shape(surf_ship, &shipshape);
 476
 477         // Load the life indicator (small ship) graphic.
 478         NULLERROR(temp = IMG_Load(add_path("indicators/life.png")));
 479         NULLERROR(surf_life = SDL_DisplayFormat(temp));
 480
 481         init_engine_dots();
 482         init_space_dots();
 483
 484         init_rocks();
 485
 486         // Remove the mouse cursor
 487 #ifdef SDL_DISABLE
 488         SDL_ShowCursor(SDL_DISABLE);
 489 #endif
 490
 491         return 0;
 492 }
 493
 494 int
 495 draw() {
 496         int i;
 497         SDL_Rect src,dest;
 498         int bang, x;
 499         char *text;
 500         float fadegame,fadeover;
 501
 502         bang = 0;
 503
 504         src.x = 0;
 505         src.y = 0;
 506         dest.x = 0;
 507         dest.y = 0;
 508
 509         // Draw a fully black background
 510         SDL_FillRect(surf_screen,NULL,0);
 511
 512         // Draw the background dots
 513         drawdots(surf_screen);
 514
 515         // Draw ship
 516         if(!gameover && state == GAMEPLAY ) {
 517                 src.w = surf_ship->w;
 518                 src.h = surf_ship->h;
 519                 dest.w = src.w;
 520                 dest.h = src.h;
 521                 dest.x = (int)shipx;
 522                 dest.y = (int)shipy;
 523                 SDL_BlitSurface(surf_ship,&src,surf_screen,&dest);
 524         }
 525
 526         draw_rocks();
 527
 528         // Draw the life indicators.
 529         if(state == GAMEPLAY || state == DEAD_PAUSE || state == GAME_OVER)
 530         for(i = 0; i<nships-1; i++) {
 531                 src.w = surf_life->w;
 532                 src.h = surf_life->h;
 533                 dest.w = src.w;
 534                 dest.h = src.h;
 535                 dest.x = (i + 1)*(src.w + 10);
 536                 dest.y = 20;
 537                 SDL_BlitSurface(surf_life, &src, surf_screen, &dest);
 538         }
 539
 540         // Draw the score
 541         snprintscore_line(topline, 50, score);
 542         SFont_Write(surf_screen, g_font, XSIZE-250, 0, topline);
 543
 544         // If it's game over, show the game over graphic in the dead centre
 545         switch (state) {
 546                 case GAME_OVER:
 547                         if(fadetimer<3.0/faderate) {
 548                                 fadegame = fadetimer/(3.0/faderate);
 549                         } else {
 550                                 fadegame = 1.0;
 551                         }
 552
 553                         if(fadetimer<3.0/faderate) {
 554                                 fadeover = 0.0;
 555                         } else if(fadetimer<6.0/faderate) {
 556                                 fadeover = ((3.0/faderate)-fadetimer)/(6.0/faderate);
 557                         } else {
 558                                 fadeover = 1.0;
 559                         }
 560
 561                         src.w = surf_b_game->w;
 562                         src.h = surf_b_game->h;
 563                         dest.w = src.w;
 564                         dest.h = src.h;
 565                         dest.x = (XSIZE-src.w)/2;
 566                         dest.y = (YSIZE-src.h)/2-40;
 567                         SDL_SetAlpha(surf_b_game, SDL_SRCALPHA, (int)(fadegame*(200 + 55*cos(fadetimer += gamerate/1.0))));
 568                         SDL_BlitSurface(surf_b_game,&src,surf_screen,&dest);
 569
 570                         src.w = surf_b_over->w;
 571                         src.h = surf_b_over->h;
 572                         dest.w = src.w;
 573                         dest.h = src.h;
 574                         dest.x = (XSIZE-src.w)/2;
 575                         dest.y = (YSIZE-src.h)/2 + 40;
 576                         SDL_SetAlpha(surf_b_over, SDL_SRCALPHA, (int)(fadeover*(200 + 55*sin(fadetimer))));
 577                         SDL_BlitSurface(surf_b_over,&src,surf_screen,&dest);
 578                 break;
 579
 580                 case TITLE_PAGE:
 581
 582                         src.w = surf_b_variations->w;
 583                         src.h = surf_b_variations->h;
 584                         dest.w = src.w;
 585                         dest.h = src.h;
 586                         dest.x = (XSIZE-src.w)/2 + cos(fadetimer/6.5)*10;
 587                         dest.y = (YSIZE/2-src.h)/2 + sin(fadetimer/5.0)*10;
 588                         SDL_SetAlpha(surf_b_variations, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer += gamerate/2.0)));
 589                         SDL_BlitSurface(surf_b_variations,&src,surf_screen,&dest);
 590
 591                         src.w = surf_b_on->w;
 592                         src.h = surf_b_on->h;
 593                         dest.w = src.w;
 594                         dest.h = src.h;
 595                         dest.x = (XSIZE-src.w)/2 + cos((fadetimer + 1.0)/6.5)*10;
 596                         dest.y = (YSIZE/2-src.h)/2 + surf_b_variations->h + 20 + sin((fadetimer + 1.0)/5.0)*10;
 597                         SDL_SetAlpha(surf_b_on, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-1.0)));
 598                         SDL_BlitSurface(surf_b_on,&src,surf_screen,&dest);
 599
 600                         src.w = surf_b_rockdodger->w;
 601                         src.h = surf_b_rockdodger->h;
 602                         dest.w = src.w;
 603                         dest.h = src.h;
 604                         dest.x = (XSIZE-src.w)/2 + cos((fadetimer + 2.0)/6.5)*10;
 605                         dest.y = (YSIZE/2-src.h)/2 + surf_b_variations->h + surf_b_on->h + 40 + sin((fadetimer + 2.0)/5)*10;
 606                         SDL_SetAlpha(surf_b_rockdodger, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-2.0)));
 607                         SDL_BlitSurface(surf_b_rockdodger,&src,surf_screen,&dest);
 608
 609                         text = "Version " VERSION;
 610                         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + sin(fadetimer/4.5)*10;
 611                         SFont_Write(surf_screen,g_font,x,YSIZE-50 + sin(fadetimer/2)*5,text);
 612
 613                         text = sequence[(int)(fadetimer/40)%NSEQUENCE];
 614                         //text = "Press SPACE to start!";
 615                         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + cos(fadetimer/4.5)*10;
 616                         SFont_Write(surf_screen,g_font,x,YSIZE-100 + cos(fadetimer/3)*5,text);
 617                 break;
 618
 619                 case HIGH_SCORE_ENTRY:
 620                         play_tune(2);
 621                         if(!process_score_input()) {  // done inputting name
 622
 623                                 // Change state to briefly show high scores page
 624                                 state = HIGH_SCORE_DISPLAY;
 625                                 state_timeout = 200;
 626
 627                                 // Write the high score table to the file
 628                                 write_high_score_table();
 629
 630                                 // Play the title page tune
 631                                 play_tune(0);
 632                         }
 633                 // FALL THROUGH TO
 634                 case HIGH_SCORE_DISPLAY:
 635                         // Display de list o high scores mon.
 636                         display_scores(surf_screen, 150,50);
 637                         break;
 638                 case GAMEPLAY:
 639                 case DEAD_PAUSE:
 640                         ; // no action necessary
 641         }
 642
 643         if(!gameover && state == GAMEPLAY) {
 644                 bang = hit_rocks(shipx, shipy, &shipshape);
 645         }
 646
 647         ticks_since_last = SDL_GetTicks()-last_ticks;
 648         last_ticks = SDL_GetTicks();
 649         if(ticks_since_last>200 || ticks_since_last<0) {
 650                 gamerate = 0;
 651         }
 652         else {
 653                 gamerate = GAMESPEED*ticks_since_last/50.0;
 654                 if(state == GAMEPLAY) {
 655                         score += ticks_since_last;
 656                 }
 657         }
 658
 659         // Update the surface
 660         SDL_Flip(surf_screen);
 661
 662
 663         return bang;
 664 }
 665
 666 int
 667 gameloop() {
 668         Uint8 *keystate;
 669
 670
 671         for(;;) {
 672                 if(!paused) {
 673                         // Count down the game loop timer, and change state when it gets to zero or less;
 674
 675                         if((state_timeout -= gamerate*3) < 0) {
 676                                 switch(state) {
 677                                         case DEAD_PAUSE:
 678                                                 // Create a new ship and start all over again
 679                                                 state = GAMEPLAY;
 680                                                 play_tune(1);
 681                                                 shipx -= 50;
 682                                                 break;
 683                                         case GAME_OVER:
 684                                                 state = HIGH_SCORE_ENTRY;
 685                                                 state_timeout = 5.0e6;
 686                                                 if(new_high_score(score)) {
 687                                                         SDL_Event e;
 688                                                         SDL_EnableUNICODE(1);
 689                                                         while(SDL_PollEvent(&e))
 690                                                                 ;
 691                                                 } else {
 692                                                         state = HIGH_SCORE_DISPLAY;
 693                                                         state_timeout = 400;
 694                                                 }
 695                                                 break;
 696                                         case HIGH_SCORE_DISPLAY:
 697                                                 state = TITLE_PAGE;
 698                                                 state_timeout = 500.0;
 699                                                 break;
 700                                         case HIGH_SCORE_ENTRY:
 701                                                 // state = TITLE_PAGE;
 702                                                 // play_tune(1);
 703                                                 // state_timeout = 100.0;
 704                                                 break;
 705                                         case TITLE_PAGE:
 706                                                 state = HIGH_SCORE_DISPLAY;
 707                                                 state_timeout = 200.0;
 708                                                 break;
 709                                         case GAMEPLAY:
 710                                                 ; // no action necessary
 711                                 }
 712                         } else {
 713                                 if(state == DEAD_PAUSE) {
 714                                         float blast_radius;
 715                                         int fixonly;
 716
 717                                         if(state_timeout < DEAD_PAUSE_LENGTH - 20.0) {
 718                                                 blast_radius = BLAST_RADIUS * 1.3;
 719                                                 fixonly = 1;
 720                                         } else {
 721                                                 blast_radius = BLAST_RADIUS * (DEAD_PAUSE_LENGTH - state_timeout) / 20.0;
 722                                                 fixonly = 0;
 723                                         }
 724                                         blast_rocks(shipx, shipy, blast_radius, fixonly);
 725
 726                                         if(shipx < 60) shipx = 60;
 727                                 }
 728                         }
 729
 730                         new_rocks();
 731
 732                         // FRICTION?
 733                         if(friction) {
 734                                 shipdx *= pow((double)0.9,(double)gamerate);
 735                                 shipdy *= pow((double)0.9,(double)gamerate);
 736                         }
 737
 738                         // INERTIA
 739                         shipx += shipdx*gamerate;
 740                         shipy += shipdy*gamerate;
 741
 742                         // SCROLLING
 743                         yscroll = shipy - (YSIZE / 2);
 744                         yscroll += shipdy * 25;
 745                         yscroll /= -25;
 746                         yscroll = ((scrollvel * (12 - gamerate)) + (yscroll * gamerate)) / 12;
 747                         scrollvel = yscroll;
 748                         yscroll = yscroll*gamerate;
 749                         shipy += yscroll;
 750
 751                         move_rocks();
 752
 753
 754                         // BOUNCE X
 755                         if(shipx<0 || shipx>XSIZE-surf_ship->w) {
 756                                 // BOUNCE from left and right wall
 757                                 shipx -= shipdx*gamerate;
 758                                 shipdx *= -0.99;
 759                         }
 760
 761                         // BOUNCE Y
 762                         if(shipy<0 || shipy>YSIZE-surf_ship->h) {
 763                                 // BOUNCE from top and bottom wall
 764                                 shipy -= shipdy;
 765                                 shipdy *= -0.99;
 766                         }
 767
 768
 769                         if(draw() && state == GAMEPLAY) {
 770                                 // Play the explosion sound
 771                                 play_sound(0);
 772                                 makebangdots(shipx,shipy,shipdx,shipdy,surf_ship,30);
 773                                 shipdx = 0;
 774                                 shipdy = 0;
 775                                 if(--nships <= 0) {
 776                                         gameover = 1;
 777                                         state = GAME_OVER;
 778                                         state_timeout = 200.0;
 779                                         fadetimer = 0.0;
 780                                         faderate = gamerate;
 781                                 }
 782                                 else {
 783                                         state = DEAD_PAUSE;
 784                                         state_timeout = DEAD_PAUSE_LENGTH;
 785                                 }
 786                         }
 787
 788                         SDL_PumpEvents();
 789                         keystate = SDL_GetKeyState(NULL);
 790
 791                         if(keystate[SDLK_SPACE] && (state == HIGH_SCORE_DISPLAY || state == TITLE_PAGE)) {
 792
 793                                 reset_rocks();
 794
 795                                 nships = 4;
 796                                 score = 0;
 797
 798                                 state = GAMEPLAY;
 799                                 play_tune(1);
 800
 801                                 gameover = 0;
 802                                 shipx = 0;
 803                                 shipy = YSIZE/2;
 804                                 shipdx = -1;
 805                                 shipdy = 0;
 806                         }
 807
 808                         maneuver = 0;
 809                 } else {
 810                         SDL_PumpEvents();
 811                         keystate = SDL_GetKeyState(NULL);
 812                 }
 813
 814                 if(state == GAMEPLAY) {
 815                         if(!gameover) {
 816
 817                                 if(!paused) {
 818                                         if(keystate[SDLK_UP] | keystate[SDLK_c])                { shipdy -= 1.5*gamerate; maneuver |= 1<<3;}
 819                                         if(keystate[SDLK_DOWN] | keystate[SDLK_t])              { shipdy += 1.5*gamerate; maneuver |= 1<<1;}
 820                                         if(keystate[SDLK_LEFT] | keystate[SDLK_h])              { shipdx -= 1.5*gamerate; maneuver |= 1<<2;}
 821                                         if(keystate[SDLK_RIGHT] | keystate[SDLK_n])             { shipdx += 1.5*gamerate; maneuver |= 1;}
 822                                         if(keystate[SDLK_3])            { SDL_SaveBMP(surf_screen, "snapshot.bmp"); }
 823                                 }
 824
 825                                 if(keystate[SDLK_p] | keystate[SDLK_s]) {
 826                                         if(!pausedown) {
 827                                                 paused = !paused;
 828                                                 pausedown = 1;
 829                                         }
 830                                 } else {
 831                                         pausedown = 0;
 832                                 }
 833
 834                         }
 835                         else {
 836                                 paused = 0;
 837                                 pausedown = 0;
 838                         }
 839                 } else if(state == GAME_OVER) {
 840                         if(keystate[SDLK_SPACE]) {
 841                                 state_timeout = -1;
 842                         }
 843                 }
 844
 845                 if(state != HIGH_SCORE_ENTRY && (keystate[SDLK_q] || keystate[SDLK_ESCAPE])) {
 846                         return 0;
 847                 }
 848
 849         }
 850 }
 851
 852 int
 853 main(int argc, char **argv) {
 854         int x, fullscreen;
 855
 856         fullscreen = 0;
 857         tail_plume = 0;
 858         friction = 0;
 859         sound_flag = 1;
 860         music_flag = 0;
 861
 862         while ((x = getopt(argc,argv,"efhmps")) >= 0) {
 863                 switch(x) {
 864                         case 'e': // engine
 865                                 tail_plume = 1;
 866                         break;
 867                         case 'f': // fullscreen
 868                                 fullscreen = 1;
 869                         break;
 870                         case 'h': // help
 871                                 printf("Variations on RockDodger\n"
 872                                        " -e big tail [E]ngine\n"
 873                                        " -f [F]ull screen\n"
 874                                        " -h this [H]elp message\n"
 875                                        " -m enable [M]usic\n"
 876                                        " -p original [P]hysics (friction)\n"
 877                                        " -s [S]ilent (no sound)\n");
 878                                 exit(0);
 879                         break;
 880                         case 'm': // music
 881                                 music_flag = 1;
 882                         case 'p': // physics
 883                                 friction = 1;
 884                         break;
 885                         case 's': // silent
 886                                 sound_flag = 0;
 887                                 music_flag = 0;
 888                         break;
 889                 }
 890         }
 891
 892         if(init(fullscreen)) {
 893                 printf ("ta: '%s'\n",initerror);
 894                 return 1;
 895         }
 896
 897         reset_rocks();
 898         initticks = SDL_GetTicks();
 899         gameloop();
 900
 901         return 0;
 902 }