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 float dist_sq(float x1, float y1, float x2, float y2)
 115 {
 116         return (x2-x1)*(x2-x1) + (y2-y1)*(y2-y1);
 117 }
 118
 119 // ************************************* FUNCS
 120
 121 float
 122 rnd() {
 123         return (float)random()/(float)RAND_MAX;
 124 }
 125
 126 void
 127 init_engine_dots() {
 128         int i;
 129         for(i = 0; i<MAXENGINEDOTS; i++) {
 130                 edot[i].active = 0;
 131         }
 132 }
 133
 134 void
 135 init_space_dots() {
 136         int i,intensity;
 137         for(i = 0; i<MAXSPACEDOTS; i++) {
 138                 float r;
 139
 140                 sdot[i].x = rnd()*(XSIZE-5);
 141                 sdot[i].y = rnd()*(YSIZE-5);
 142
 143                 r = rnd()*rnd();
 144
 145                 sdot[i].dx = -r*4;
 146                 // -1/((1-r) + .3);
 147                 intensity = (int)(r*180 + 70);
 148                 sdot[i].color = SDL_MapRGB(surf_screen->format,intensity,intensity,intensity);
 149
 150         }
 151 }
 152
 153 void
 154 makebangdots(int xbang, int ybang, int dx, int dy, SDL_Surface *s, int power) {
 155
 156         // TODO - stop generating dots after a certain amount of time has passed, to cope with slower CPUs.
 157         // TODO - generate and display dots in a circular buffer
 158
 159         int x,y,endcount;
 160         Uint16 *rawpixel,c;
 161         double theta,r;
 162         int begin_generate;
 163
 164         begin_generate = SDL_GetTicks();
 165
 166         SDL_LockSurface(s);
 167         rawpixel = (Uint16 *) s->pixels;
 168
 169         //for(n = 0; n <= power/2; n++) {
 170
 171         endcount = 0;
 172         while (endcount<3) {
 173                 for(x = 0; x<s->w; x++) {
 174                         for(y = 0; y<s->h; y++) {
 175                                 c = rawpixel[s->pitch/2*y + x];
 176                                 if(c && c != s->format->colorkey) {
 177
 178                                         theta = rnd()*M_PI*2;
 179
 180                                         r = 1-(rnd()*rnd());
 181
 182                                         bdot[bd2].dx = (power/50.0)*45.0*cos(theta)*r + dx;
 183                                         bdot[bd2].dy = (power/50.0)*45.0*sin(theta)*r + dy;
 184                                         bdot[bd2].x = x + xbang;
 185                                         bdot[bd2].y = y + ybang;
 186
 187                                         // Replace the last few bang dots with the pixels from the exploding object
 188                                         bdot[bd2].c = (endcount>0)?c:0;
 189                                         bdot[bd2].life = 100;
 190                                         bdot[bd2].decay = rnd()*3 + 1;
 191                                         bdot[bd2].active = 1;
 192
 193                                         bd2++;
 194                                         bd2 %= MAXBANGDOTS;
 195
 196                                         // If the circular buffer is filled, who cares? They've had their chance.
 197                                         //if(bd2 == bd1-1) goto exitloop;
 198
 199                                 }
 200                         }
 201                 }
 202
 203                 if(SDL_GetTicks() - begin_generate > 7) endcount++;
 204         }
 205
 206         SDL_UnlockSurface(s);
 207
 208 }
 209
 210 void
 211 draw_bang_dots(SDL_Surface *s) {
 212         int i;
 213         int first_i, last_i;
 214         Uint16 *rawpixel;
 215         rawpixel = (Uint16 *) s->pixels;
 216
 217         first_i = -1;
 218
 219         for(i = bd1; (bd1 <= bd2)?(i<bd2):(i >= bd1 && i < bd2); last_i = ++i) {
 220
 221                 i %= MAXBANGDOTS;
 222
 223                 if(bdot[i].x <= 0 || bdot[i].x >= XSIZE || bdot[i].y <= 0 || bdot[i].y >= YSIZE) {
 224                         // If the dot has drifted outside the perimeter, kill it
 225                         bdot[i].active = 0;
 226                 }
 227
 228                 if(bdot[i].active) {
 229                         if(first_i < 0)
 230                         first_i = i;
 231                         //last_i = i + 1;
 232                         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)];
 233                         bdot[i].life -= bdot[i].decay;
 234                         bdot[i].x += bdot[i].dx*gamerate;
 235                         bdot[i].y += bdot[i].dy*gamerate + yscroll;
 236
 237                         if(bdot[i].life<0)
 238                         bdot[i].active = 0;
 239                 }
 240         }
 241
 242         if(first_i >= 0) {
 243                 bd1 = first_i;
 244                 bd2 = last_i;
 245         }
 246         else {
 247                 bd1 = 0;
 248                 bd2 = 0;
 249         }
 250
 251 }
 252
 253
 254 void
 255 draw_space_dots(SDL_Surface *s) {
 256         int i;
 257         Uint16 *rawpixel;
 258         rawpixel = (Uint16 *) s->pixels;
 259
 260         for(i = 0; i<MAXSPACEDOTS; i++) {
 261                 if(sdot[i].y<0) {
 262                         sdot[i].y = 0;
 263                 }
 264                 rawpixel[(int)(s->pitch/2*(int)sdot[i].y) + (int)(sdot[i].x)] = sdot[i].color;
 265                 sdot[i].x += sdot[i].dx*gamerate;
 266                 sdot[i].y += yscroll;
 267                 if(sdot[i].y > YSIZE) {
 268                         sdot[i].y -= YSIZE;
 269                 } else if(sdot[i].y < 0) {
 270                         sdot[i].y += YSIZE;
 271                 }
 272                 if(sdot[i].x<0) {
 273                         sdot[i].x = XSIZE;
 274                 }
 275         }
 276 }
 277
 278 void
 279 draw_engine_dots(SDL_Surface *s) {
 280         int i;
 281         Uint16 *rawpixel;
 282         rawpixel = (Uint16 *) s->pixels;
 283
 284         for(i = 0; i<MAXENGINEDOTS; i++) {
 285                 if(edot[i].active) {
 286                         edot[i].x += edot[i].dx*gamerate;
 287                         edot[i].y += edot[i].dy*gamerate + yscroll;
 288                         if((edot[i].life -= gamerate*3)<0 || edot[i].y<0 || edot[i].y>YSIZE) {
 289                                 edot[i].active = 0;
 290                         } else if(edot[i].x<0 || edot[i].x>XSIZE) {
 291                                 edot[i].active = 0;
 292                         } else {
 293                                 int heatindex;
 294                                 heatindex = edot[i].life * 6;
 295                                 //rawpixel[(int)(s->pitch/2*(int)(edot[i].y)) + (int)(edot[i].x)] = lifecolor[(int)(edot[i].life)];
 296                                 rawpixel[(int)(s->pitch/2*(int)(edot[i].y)) + (int)(edot[i].x)] = heatindex>3*W ? heatcolor[3*W-1] : heatcolor[heatindex];
 297                         }
 298                 }
 299         }
 300 }
 301
 302 void
 303 create_engine_dots(int newdots) {
 304         int i;
 305         double theta,r,dx,dy;
 306
 307         if(!tail_plume) return;
 308
 309         if(state == GAMEPLAY) {
 310                 for(i = 0; i<newdots*gamerate; i++) {
 311                         if(dotptr->active == 0) {
 312                                 theta = rnd()*M_PI*2;
 313                                 r = rnd();
 314                                 dx = cos(theta)*r;
 315                                 dy = sin(theta)*r;
 316
 317                                 dotptr->active = 1;
 318                                 dotptr->x = shipx + surf_ship->w/2-14;
 319                                 dotptr->y = shipy + surf_ship->h/2 + (rnd()-0.5)*5-1;
 320                                 dotptr->dx = 10*(dx-1.5) + shipdx;
 321                                 dotptr->dy = 1*dy + shipdy;
 322                                 dotptr->life = 45 + rnd(1)*5;
 323
 324                                 dotptr++;
 325                                 if(dotptr-edot >= MAXENGINEDOTS) {
 326                                         dotptr = edot;
 327                                 }
 328                         }
 329                 }
 330         }
 331 }
 332
 333 void
 334 create_engine_dots2(int newdots, int m) {
 335         int i;
 336         double theta, theta2, dx, dy, adx, ady;
 337
 338         // Don't create fresh engine dots when
 339         // the game is not being played and a demo is not beng shown
 340         if(state != GAMEPLAY) return;
 341
 342         for(i = 0; i<newdots; i++) {
 343                 if(dotptr->active == 0) {
 344                         theta = rnd()*M_PI*2;
 345                         theta2 = rnd()*M_PI*2;
 346
 347                         dx = cos(theta) * fabs(cos(theta2));
 348                         dy = sin(theta) * fabs(cos(theta2));
 349                         adx = fabs(dx);
 350                         ady = fabs(dy);
 351
 352
 353                         dotptr->active = 1;
 354                         dotptr->x = shipx + surf_ship->w/2 + (rnd()-0.5)*3;
 355                         dotptr->y = shipy + surf_ship->h/2 + (rnd()-0.5)*3;
 356
 357                         switch(m) {
 358                                 case 0:
 359                                         dotptr->x -= 14;
 360                                         dotptr->dx = -20*adx + shipdx;
 361                                         dotptr->dy = 2*dy + shipdy;
 362                                         dotptr->life = 60 * adx;
 363                                 break;
 364                                 case 1:
 365                                         dotptr->dx = 2*dx + shipdx;
 366                                         dotptr->dy = -20*ady + shipdy;
 367                                         dotptr->life = 60 * ady;
 368                                 break;
 369                                 case 2:
 370                                         dotptr->x += 14;
 371                                         dotptr->dx = 20*adx + shipdx;
 372                                         dotptr->dy = 2*dy + shipdy;
 373                                         dotptr->life = 60 * adx;
 374                                 break;
 375                                 case 3:
 376                                         dotptr->dx = 2*dx + shipdx;
 377                                         dotptr->dy = 20*ady + shipdy;
 378                                         dotptr->life = 60 * ady;
 379                                 break;
 380                         }
 381                         dotptr++;
 382                         if(dotptr-edot >= MAXENGINEDOTS) {
 383                                 dotptr = edot;
 384                         }
 385                 }
 386         }
 387 }
 388
 389 void
 390 drawdots(SDL_Surface *s) {
 391         int m;
 392
 393         // Create more engine dots comin' out da back
 394         if(!gameover) create_engine_dots(200);
 395
 396         // Create engine dots out the side we're moving from
 397         for(m = 0; m<4; m++) {
 398                 if(maneuver & 1<<m) { // 'maneuver' is a bit field
 399                         create_engine_dots2(80,m);
 400                 }
 401         }
 402
 403         SDL_LockSurface(s);
 404         draw_space_dots(s);
 405         draw_engine_dots(s);
 406         draw_bang_dots(s);
 407         SDL_UnlockSurface(s);
 408 }
 409
 410 int
 411 init(int fullscreen) {
 412
 413         int i;
 414         SDL_Surface *temp;
 415         Uint32 flag;
 416
 417         // Where are our data files?
 418         if(!find_files()) exit(1);
 419         read_high_score_table();
 420
 421         if(sound_flag) {
 422                 // Initialize SDL with audio and video
 423                 if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) != 0) {
 424                         sound_flag = 0;
 425                         printf ("Can't open sound, starting without it\n");
 426                         atexit(SDL_Quit);
 427                 } else {
 428                         atexit(SDL_Quit);
 429                         atexit(SDL_CloseAudio);
 430                         sound_flag = init_sound();
 431                 }
 432         } else {
 433                 // Initialize with video only
 434                 CONDERROR(SDL_Init(SDL_INIT_VIDEO) != 0);
 435                 atexit(SDL_Quit);
 436         }
 437
 438         play_tune(0);
 439
 440         // Attempt to get the required video size
 441         flag = SDL_DOUBLEBUF | SDL_HWSURFACE;
 442         if(fullscreen) flag |= SDL_FULLSCREEN;
 443         surf_screen = SDL_SetVideoMode(XSIZE,YSIZE,16,flag);
 444
 445         // Set the title bar text
 446         SDL_WM_SetCaption("Variations on Rockdodger", "VoR");
 447
 448         NULLERROR(surf_screen);
 449
 450         // Set the heat color from the range 0 (cold) to 300 (blue-white)
 451         for(i = 0; i<W*3; i++) {
 452                 heatcolor[i] = SDL_MapRGB(
 453                         surf_screen->format,
 454                         (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?
 455                 );
 456         }
 457
 458         // Load the banners
 459         NULLERROR(temp = IMG_Load(add_path("banners/variations.png")));
 460         NULLERROR(surf_b_variations = SDL_DisplayFormat(temp));
 461
 462         NULLERROR(temp = IMG_Load(add_path("banners/on.png")));
 463         NULLERROR(surf_b_on = SDL_DisplayFormat(temp));
 464
 465         NULLERROR(temp = IMG_Load(add_path("banners/rockdodger.png")));
 466         NULLERROR(surf_b_rockdodger = SDL_DisplayFormat(temp));
 467
 468         NULLERROR(temp = IMG_Load(add_path("banners/game.png")));
 469         NULLERROR(surf_b_game = SDL_DisplayFormat(temp));
 470
 471         NULLERROR(temp = IMG_Load(add_path("banners/over.png")));
 472         NULLERROR(surf_b_over = SDL_DisplayFormat(temp));
 473
 474         surf_font_big = IMG_Load(add_path(BIG_FONT_FILE));
 475         g_font = SFont_InitFont(surf_font_big);
 476
 477         // Load the spaceship graphic.
 478         NULLERROR(temp = IMG_Load(add_path("sprites/ship.png")));
 479         NULLERROR(surf_ship = SDL_DisplayFormat(temp));
 480         get_shape(surf_ship, &shipshape);
 481
 482         // Load the life indicator (small ship) graphic.
 483         NULLERROR(temp = IMG_Load(add_path("indicators/life.png")));
 484         NULLERROR(surf_life = SDL_DisplayFormat(temp));
 485
 486         init_engine_dots();
 487         init_space_dots();
 488
 489         init_rocks();
 490
 491         // Remove the mouse cursor
 492 #ifdef SDL_DISABLE
 493         SDL_ShowCursor(SDL_DISABLE);
 494 #endif
 495
 496         return 0;
 497 }
 498
 499 int
 500 draw() {
 501         int i;
 502         SDL_Rect src,dest;
 503         int bang, x;
 504         char *text;
 505         float fadegame,fadeover;
 506
 507         bang = 0;
 508
 509         src.x = 0;
 510         src.y = 0;
 511         dest.x = 0;
 512         dest.y = 0;
 513
 514         // Draw a fully black background
 515         SDL_FillRect(surf_screen,NULL,0);
 516
 517         // Draw the background dots
 518         drawdots(surf_screen);
 519
 520         // Draw ship
 521         if(!gameover && state == GAMEPLAY ) {
 522                 src.w = surf_ship->w;
 523                 src.h = surf_ship->h;
 524                 dest.w = src.w;
 525                 dest.h = src.h;
 526                 dest.x = (int)shipx;
 527                 dest.y = (int)shipy;
 528                 SDL_BlitSurface(surf_ship,&src,surf_screen,&dest);
 529         }
 530
 531         draw_rocks();
 532
 533         // Draw the life indicators.
 534         if(state == GAMEPLAY || state == DEAD_PAUSE || state == GAME_OVER)
 535         for(i = 0; i<nships-1; i++) {
 536                 src.w = surf_life->w;
 537                 src.h = surf_life->h;
 538                 dest.w = src.w;
 539                 dest.h = src.h;
 540                 dest.x = (i + 1)*(src.w + 10);
 541                 dest.y = 20;
 542                 SDL_BlitSurface(surf_life, &src, surf_screen, &dest);
 543         }
 544
 545         // Draw the score
 546         snprintscore_line(topline, 50, score);
 547         SFont_Write(surf_screen, g_font, XSIZE-250, 0, topline);
 548
 549         // If it's game over, show the game over graphic in the dead centre
 550         switch (state) {
 551                 case GAME_OVER:
 552                         if(fadetimer<3.0/faderate) {
 553                                 fadegame = fadetimer/(3.0/faderate);
 554                         } else {
 555                                 fadegame = 1.0;
 556                         }
 557
 558                         if(fadetimer<3.0/faderate) {
 559                                 fadeover = 0.0;
 560                         } else if(fadetimer<6.0/faderate) {
 561                                 fadeover = ((3.0/faderate)-fadetimer)/(6.0/faderate);
 562                         } else {
 563                                 fadeover = 1.0;
 564                         }
 565
 566                         src.w = surf_b_game->w;
 567                         src.h = surf_b_game->h;
 568                         dest.w = src.w;
 569                         dest.h = src.h;
 570                         dest.x = (XSIZE-src.w)/2;
 571                         dest.y = (YSIZE-src.h)/2-40;
 572                         SDL_SetAlpha(surf_b_game, SDL_SRCALPHA, (int)(fadegame*(200 + 55*cos(fadetimer += gamerate/1.0))));
 573                         SDL_BlitSurface(surf_b_game,&src,surf_screen,&dest);
 574
 575                         src.w = surf_b_over->w;
 576                         src.h = surf_b_over->h;
 577                         dest.w = src.w;
 578                         dest.h = src.h;
 579                         dest.x = (XSIZE-src.w)/2;
 580                         dest.y = (YSIZE-src.h)/2 + 40;
 581                         SDL_SetAlpha(surf_b_over, SDL_SRCALPHA, (int)(fadeover*(200 + 55*sin(fadetimer))));
 582                         SDL_BlitSurface(surf_b_over,&src,surf_screen,&dest);
 583                 break;
 584
 585                 case TITLE_PAGE:
 586
 587                         src.w = surf_b_variations->w;
 588                         src.h = surf_b_variations->h;
 589                         dest.w = src.w;
 590                         dest.h = src.h;
 591                         dest.x = (XSIZE-src.w)/2 + cos(fadetimer/6.5)*10;
 592                         dest.y = (YSIZE/2-src.h)/2 + sin(fadetimer/5.0)*10;
 593                         SDL_SetAlpha(surf_b_variations, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer += gamerate/2.0)));
 594                         SDL_BlitSurface(surf_b_variations,&src,surf_screen,&dest);
 595
 596                         src.w = surf_b_on->w;
 597                         src.h = surf_b_on->h;
 598                         dest.w = src.w;
 599                         dest.h = src.h;
 600                         dest.x = (XSIZE-src.w)/2 + cos((fadetimer + 1.0)/6.5)*10;
 601                         dest.y = (YSIZE/2-src.h)/2 + surf_b_variations->h + 20 + sin((fadetimer + 1.0)/5.0)*10;
 602                         SDL_SetAlpha(surf_b_on, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-1.0)));
 603                         SDL_BlitSurface(surf_b_on,&src,surf_screen,&dest);
 604
 605                         src.w = surf_b_rockdodger->w;
 606                         src.h = surf_b_rockdodger->h;
 607                         dest.w = src.w;
 608                         dest.h = src.h;
 609                         dest.x = (XSIZE-src.w)/2 + cos((fadetimer + 2.0)/6.5)*10;
 610                         dest.y = (YSIZE/2-src.h)/2 + surf_b_variations->h + surf_b_on->h + 40 + sin((fadetimer + 2.0)/5)*10;
 611                         SDL_SetAlpha(surf_b_rockdodger, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-2.0)));
 612                         SDL_BlitSurface(surf_b_rockdodger,&src,surf_screen,&dest);
 613
 614                         text = "Version " VERSION;
 615                         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + sin(fadetimer/4.5)*10;
 616                         SFont_Write(surf_screen,g_font,x,YSIZE-50 + sin(fadetimer/2)*5,text);
 617
 618                         text = sequence[(int)(fadetimer/40)%NSEQUENCE];
 619                         //text = "Press SPACE to start!";
 620                         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + cos(fadetimer/4.5)*10;
 621                         SFont_Write(surf_screen,g_font,x,YSIZE-100 + cos(fadetimer/3)*5,text);
 622                 break;
 623
 624                 case HIGH_SCORE_ENTRY:
 625                         play_tune(2);
 626                         if(!process_score_input()) {  // done inputting name
 627
 628                                 // Change state to briefly show high scores page
 629                                 state = HIGH_SCORE_DISPLAY;
 630                                 state_timeout = 200;
 631
 632                                 // Write the high score table to the file
 633                                 write_high_score_table();
 634
 635                                 // Play the title page tune
 636                                 play_tune(0);
 637                         }
 638                 // FALL THROUGH TO
 639                 case HIGH_SCORE_DISPLAY:
 640                         // Display de list o high scores mon.
 641                         display_scores(surf_screen, 150,50);
 642                         break;
 643                 case GAMEPLAY:
 644                 case DEAD_PAUSE:
 645                         ; // no action necessary
 646         }
 647
 648         if(!gameover && state == GAMEPLAY) {
 649                 bang = hit_rocks(shipx, shipy, &shipshape);
 650         }
 651
 652         ticks_since_last = SDL_GetTicks()-last_ticks;
 653         last_ticks = SDL_GetTicks();
 654         if(ticks_since_last>200 || ticks_since_last<0) {
 655                 gamerate = 0;
 656         }
 657         else {
 658                 gamerate = GAMESPEED*ticks_since_last/50.0;
 659                 if(state == GAMEPLAY) {
 660                         score += ticks_since_last;
 661                 }
 662         }
 663
 664         // Update the surface
 665         SDL_Flip(surf_screen);
 666
 667
 668         return bang;
 669 }
 670
 671 int
 672 gameloop() {
 673         Uint8 *keystate;
 674
 675
 676         for(;;) {
 677                 if(!paused) {
 678                         // Count down the game loop timer, and change state when it gets to zero or less;
 679
 680                         if((state_timeout -= gamerate*3) < 0) {
 681                                 switch(state) {
 682                                         case DEAD_PAUSE:
 683                                                 // Create a new ship and start all over again
 684                                                 state = GAMEPLAY;
 685                                                 play_tune(1);
 686                                                 shipx -= 50;
 687                                                 break;
 688                                         case GAME_OVER:
 689                                                 state = HIGH_SCORE_ENTRY;
 690                                                 state_timeout = 5.0e6;
 691                                                 if(new_high_score(score)) {
 692                                                         SDL_Event e;
 693                                                         SDL_EnableUNICODE(1);
 694                                                         while(SDL_PollEvent(&e))
 695                                                                 ;
 696                                                 } else {
 697                                                         state = HIGH_SCORE_DISPLAY;
 698                                                         state_timeout = 400;
 699                                                 }
 700                                                 break;
 701                                         case HIGH_SCORE_DISPLAY:
 702                                                 state = TITLE_PAGE;
 703                                                 state_timeout = 500.0;
 704                                                 break;
 705                                         case HIGH_SCORE_ENTRY:
 706                                                 // state = TITLE_PAGE;
 707                                                 // play_tune(1);
 708                                                 // state_timeout = 100.0;
 709                                                 break;
 710                                         case TITLE_PAGE:
 711                                                 state = HIGH_SCORE_DISPLAY;
 712                                                 state_timeout = 200.0;
 713                                                 break;
 714                                         case GAMEPLAY:
 715                                                 ; // no action necessary
 716                                 }
 717                         } else {
 718                                 if(state == DEAD_PAUSE) {
 719                                         float blast_radius;
 720                                         int fixonly;
 721
 722                                         if(state_timeout < DEAD_PAUSE_LENGTH - 20.0) {
 723                                                 blast_radius = BLAST_RADIUS * 1.3;
 724                                                 fixonly = 1;
 725                                         } else {
 726                                                 blast_radius = BLAST_RADIUS * (DEAD_PAUSE_LENGTH - state_timeout) / 20.0;
 727                                                 fixonly = 0;
 728                                         }
 729                                         blast_rocks(shipx, shipy, blast_radius, fixonly);
 730
 731                                         if(shipx < 60) shipx = 60;
 732                                 }
 733                         }
 734
 735                         new_rocks();
 736
 737                         // FRICTION?
 738                         if(friction) {
 739                                 shipdx *= pow((double)0.9,(double)gamerate);
 740                                 shipdy *= pow((double)0.9,(double)gamerate);
 741                         }
 742
 743                         // INERTIA
 744                         shipx += shipdx*gamerate;
 745                         shipy += shipdy*gamerate;
 746
 747                         // SCROLLING
 748                         yscroll = shipy - (YSIZE / 2);
 749                         yscroll += shipdy * 25;
 750                         yscroll /= -25;
 751                         yscroll = ((scrollvel * (12 - gamerate)) + (yscroll * gamerate)) / 12;
 752                         scrollvel = yscroll;
 753                         yscroll = yscroll*gamerate;
 754                         shipy += yscroll;
 755
 756                         move_rocks();
 757
 758
 759                         // BOUNCE X
 760                         if(shipx<0 || shipx>XSIZE-surf_ship->w) {
 761                                 // BOUNCE from left and right wall
 762                                 shipx -= shipdx*gamerate;
 763                                 shipdx *= -0.99;
 764                         }
 765
 766                         // BOUNCE Y
 767                         if(shipy<0 || shipy>YSIZE-surf_ship->h) {
 768                                 // BOUNCE from top and bottom wall
 769                                 shipy -= shipdy;
 770                                 shipdy *= -0.99;
 771                         }
 772
 773
 774                         if(draw() && state == GAMEPLAY) {
 775                                 // Play the explosion sound
 776                                 play_sound(0);
 777                                 makebangdots(shipx,shipy,shipdx,shipdy,surf_ship,30);
 778                                 if(--nships <= 0) {
 779                                         gameover = 1;
 780                                         state = GAME_OVER;
 781                                         state_timeout = 200.0;
 782                                         fadetimer = 0.0;
 783                                         faderate = gamerate;
 784                                 }
 785                                 else {
 786                                         state = DEAD_PAUSE;
 787                                         state_timeout = DEAD_PAUSE_LENGTH;
 788                                         shipdx = 0;
 789                                         shipdy = 0;
 790                                 }
 791                         }
 792
 793                         SDL_PumpEvents();
 794                         keystate = SDL_GetKeyState(NULL);
 795
 796                         if(state != HIGH_SCORE_ENTRY && (keystate[SDLK_q] || keystate[SDLK_ESCAPE])) {
 797                                 return 0;
 798                         }
 799
 800                         if(keystate[SDLK_SPACE] && (state == HIGH_SCORE_DISPLAY || state == TITLE_PAGE)) {
 801
 802                                 reset_rocks();
 803
 804                                 nships = 4;
 805                                 score = 0;
 806
 807                                 state = GAMEPLAY;
 808                                 play_tune(1);
 809
 810                                 gameover = 0;
 811                                 shipx = 0;
 812                                 shipy = YSIZE/2;
 813                                 shipdx = -1;
 814                                 shipdy = 0;
 815                         }
 816
 817                         maneuver = 0;
 818                 } else {
 819                         SDL_PumpEvents();
 820                         keystate = SDL_GetKeyState(NULL);
 821                 }
 822
 823                 if(state == GAMEPLAY) {
 824                         if(!gameover) {
 825
 826                                 if(!paused) {
 827                                         if(keystate[SDLK_UP] | keystate[SDLK_c])                { shipdy -= 1.5*gamerate; maneuver |= 1<<3;}
 828                                         if(keystate[SDLK_DOWN] | keystate[SDLK_t])              { shipdy += 1.5*gamerate; maneuver |= 1<<1;}
 829                                         if(keystate[SDLK_LEFT] | keystate[SDLK_h])              { shipdx -= 1.5*gamerate; maneuver |= 1<<2;}
 830                                         if(keystate[SDLK_RIGHT] | keystate[SDLK_n])             { shipdx += 1.5*gamerate; maneuver |= 1;}
 831                                         if(keystate[SDLK_3])            { SDL_SaveBMP(surf_screen, "snapshot.bmp"); }
 832                                 }
 833
 834                                 if(keystate[SDLK_p] | keystate[SDLK_s]) {
 835                                         if(!pausedown) {
 836                                                 paused = !paused;
 837                                                 pausedown = 1;
 838                                         }
 839                                 } else {
 840                                         pausedown = 0;
 841                                 }
 842
 843                         }
 844                         else {
 845                                 paused = 0;
 846                                 pausedown = 0;
 847                         }
 848                 } else if(state == GAME_OVER) {
 849                         if(keystate[SDLK_SPACE]) {
 850                                 state_timeout = -1;
 851                         }
 852                 }
 853         }
 854 }
 855
 856 int
 857 main(int argc, char **argv) {
 858         int x, fullscreen;
 859
 860         fullscreen = 0;
 861         tail_plume = 0;
 862         friction = 0;
 863         sound_flag = 1;
 864         music_flag = 0;
 865
 866         while ((x = getopt(argc,argv,"efhmps")) >= 0) {
 867                 switch(x) {
 868                         case 'e': // engine
 869                                 tail_plume = 1;
 870                         break;
 871                         case 'f': // fullscreen
 872                                 fullscreen = 1;
 873                         break;
 874                         case 'h': // help
 875                                 printf("Variations on RockDodger\n"
 876                                        " -e big tail [E]ngine\n"
 877                                        " -f [F]ull screen\n"
 878                                        " -h this [H]elp message\n"
 879                                        " -m enable [M]usic\n"
 880                                        " -p original [P]hysics (friction)\n"
 881                                        " -s [S]ilent (no sound)\n");
 882                                 exit(0);
 883                         break;
 884                         case 'm': // music
 885                                 music_flag = 1;
 886                         case 'p': // physics
 887                                 friction = 1;
 888                         break;
 889                         case 's': // silent
 890                                 sound_flag = 0;
 891                                 music_flag = 0;
 892                         break;
 893                 }
 894         }
 895
 896         if(init(fullscreen)) {
 897                 printf ("ta: '%s'\n",initerror);
 898                 return 1;
 899         }
 900
 901         reset_rocks();
 902         initticks = SDL_GetTicks();
 903         gameloop();
 904
 905         return 0;
 906 }