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 "score.h"
  29 #include "shape.h"
  30 #include "sound.h"
  31
  32 #include <math.h>
  33 #include <SDL/SDL.h>
  34 #include <SDL/SDL_image.h>
  35 #include <stdarg.h>
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38 #include <string.h>
  39 #include <unistd.h>
  40
  41 #include "SFont.h"
  42
  43 #define CONDERROR(a) if((a)) {initerror = strdup(SDL_GetError());return 1;}
  44 #define NULLERROR(a) CONDERROR((a) == NULL)
  45
  46 // ************************************* STRUCTS
  47 struct rock_struct {
  48         // Array of black pixel coordinates. This is scanned
  49         // every frame to see if it's still black, and as
  50         // soon as it isn't we BLOW UP
  51         float x,y,dx,dy;
  52         int active;
  53         int dead;  // has been blown out of the way
  54                    // to make room for a new ship appearing.
  55         SDL_Surface *image;
  56         struct shape *shape;
  57         int type_number;
  58 };
  59 struct black_point_struct {
  60         int x,y;
  61 };
  62 struct bangdots {
  63         // Bang dots have the same colour as shield dots.
  64         // Bang dots get darker as they age.
  65         // Some are coloured the same as the ex-ship.
  66         float x,y,dx,dy;
  67         Uint16 c; // when zero, use heatcolor[bangdotlife]
  68         float life;     // When reduced to 0, set active = 0
  69         int active;
  70         float decay;// Amount by which to reduce life each time dot is drawn
  71 };
  72 struct enginedots {
  73         // Engine dots stream out the back of the ship, getting darker as they go.
  74         int active;
  75         float x,y,dx,dy;
  76         // The life of an engine dot
  77         // is a number starting at between 0 and 50 and counting backward.
  78         float life;     // When reduced to 0, set active = 0
  79 };
  80 struct spacedot {
  81         // Space dots are harmless background items
  82         // All are active. When one falls off the edge, another is created at the start.
  83         float x,y,dx;
  84         Uint16 color;
  85 };
  86
  87 // ************************************* VARS
  88 // SDL_Surface global variables
  89 SDL_Surface
  90         *surf_screen,   // Screen
  91         *surf_b_variations, // "variations" banner
  92         *surf_b_on, // "on" banner
  93         *surf_b_rockdodger, // "rockdodger" banner
  94         *surf_b_game,   // Title element "game"
  95         *surf_b_over,   // Title element "over"
  96         *surf_ship,             // Spaceship element
  97         *surf_life,     // Indicator of number of ships remaining
  98         *surf_rock[NROCKS],     // THE ROCKS
  99         *surf_font_big; // The big font
 100
 101 struct shape rock_shapes[NROCKS];
 102
 103 SFont_Font *g_font;
 104
 105 // Structure global variables
 106 struct enginedots edot[MAXENGINEDOTS], *dotptr = edot;
 107 struct rock_struct rock[MAXROCKS], *rockptr = rock;
 108 struct black_point_struct black_point[MAXBLACKPOINTS], *blackptr = black_point;
 109 struct bangdots bdot[MAXBANGDOTS], *bdotptr = bdot;
 110 struct spacedot sdot[MAXSPACEDOTS];
 111
 112 // Other global variables
 113 char topline[1024];
 114 char *initerror = "";
 115
 116 float shipx,shipy = 240.0;      // X position, 0..XSIZE
 117 float shipdx,shipdy;    // Change in X position per tick.
 118 float rockrate,rockspeed;
 119 float movementrate;  // this controls the speed of everything that moves.
 120 float yscroll;
 121 float scrollvel;
 122
 123 int nships,score,initticks,ticks_since_last, last_ticks;
 124 int gameover;
 125 int countdown = 0;
 126 int maneuver = 0;
 127 int sound_flag = 1, music_flag = 0;
 128 int tail_plume = 0; // display big engine at the back?
 129 int friction = 0;       // should there be friction?
 130 float fadetimer = 0, faderate;
 131
 132 int pausedown = 0, paused = 0;
 133
 134 // bangdot start (bd1) and end (bd2) position:
 135 int bd1 = 0, bd2 = 0;
 136
 137 enum states {
 138         TITLE_PAGE,
 139         GAMEPLAY,
 140         DEAD_PAUSE,
 141         GAME_OVER,
 142         HIGH_SCORE_ENTRY,
 143         HIGH_SCORE_DISPLAY
 144 };
 145 enum states state = TITLE_PAGE;
 146 float state_timeout = 600.0;
 147
 148 #define NSEQUENCE 2
 149 char *sequence[] = {
 150         "Press SPACE to start",
 151         "http://qualdan.com/vor/"
 152 };
 153
 154 int bangdotlife, nbangdots;
 155 Uint16 heatcolor[W*3];
 156
 157 char *data_dir;
 158 extern char *optarg;
 159 extern int optind, opterr, optopt;
 160
 161 float dist_sq(float x1, float y1, float x2, float y2)
 162 {
 163         return (x2-x1)*(x2-x1) + (y2-y1)*(y2-y1);
 164 }
 165
 166 // ************************************* FUNCS
 167
 168 float
 169 rnd() {
 170         return (float)random()/(float)RAND_MAX;
 171 }
 172
 173 void
 174 init_engine_dots() {
 175         int i;
 176         for(i = 0; i<MAXENGINEDOTS; i++) {
 177                 edot[i].active = 0;
 178         }
 179 }
 180
 181 void
 182 init_space_dots() {
 183         int i,intensity;
 184         for(i = 0; i<MAXSPACEDOTS; i++) {
 185                 float r;
 186
 187                 sdot[i].x = rnd()*(XSIZE-5);
 188                 sdot[i].y = rnd()*(YSIZE-5);
 189
 190                 r = rnd()*rnd();
 191
 192                 sdot[i].dx = -r*4;
 193                 // -1/((1-r) + .3);
 194                 intensity = (int)(r*180 + 70);
 195                 sdot[i].color = SDL_MapRGB(surf_screen->format,intensity,intensity,intensity);
 196
 197         }
 198 }
 199
 200 void
 201 makebangdots(int xbang, int ybang, int dx, int dy, SDL_Surface *s, int power) {
 202
 203         // TODO - stop generating dots after a certain amount of time has passed, to cope with slower CPUs.
 204         // TODO - generate and display dots in a circular buffer
 205
 206         int x,y,endcount;
 207         Uint16 *rawpixel,c;
 208         double theta,r;
 209         int begin_generate;
 210
 211         begin_generate = SDL_GetTicks();
 212
 213         SDL_LockSurface(s);
 214         rawpixel = (Uint16 *) s->pixels;
 215
 216         //for(n = 0; n <= power/2; n++) {
 217
 218         endcount = 0;
 219         while (endcount<3) {
 220                 for(x = 0; x<s->w; x++) {
 221                         for(y = 0; y<s->h; y++) {
 222                                 c = rawpixel[s->pitch/2*y + x];
 223                                 if(c && c != s->format->colorkey) {
 224
 225                                         theta = rnd()*M_PI*2;
 226
 227                                         r = 1-(rnd()*rnd());
 228
 229                                         bdot[bd2].dx = (power/50.0)*45.0*cos(theta)*r + dx;
 230                                         bdot[bd2].dy = (power/50.0)*45.0*sin(theta)*r + dy;
 231                                         bdot[bd2].x = x + xbang;
 232                                         bdot[bd2].y = y + ybang;
 233
 234                                         // Replace the last few bang dots with the pixels from the exploding object
 235                                         bdot[bd2].c = (endcount>0)?c:0;
 236                                         bdot[bd2].life = 100;
 237                                         bdot[bd2].decay = rnd()*3 + 1;
 238                                         bdot[bd2].active = 1;
 239
 240                                         bd2++;
 241                                         bd2 %= MAXBANGDOTS;
 242
 243                                         // If the circular buffer is filled, who cares? They've had their chance.
 244                                         //if(bd2 == bd1-1) goto exitloop;
 245
 246                                 }
 247                         }
 248                 }
 249
 250                 if(SDL_GetTicks() - begin_generate > 7) endcount++;
 251         }
 252
 253         SDL_UnlockSurface(s);
 254
 255 }
 256
 257 void
 258 draw_bang_dots(SDL_Surface *s) {
 259         int i;
 260         int first_i, last_i;
 261         Uint16 *rawpixel;
 262         rawpixel = (Uint16 *) s->pixels;
 263
 264         first_i = -1;
 265
 266         for(i = bd1; (bd1 <= bd2)?(i<bd2):(i >= bd1 && i < bd2); last_i = ++i) {
 267
 268                 i %= MAXBANGDOTS;
 269
 270                 if(bdot[i].x <= 0 || bdot[i].x >= XSIZE || bdot[i].y <= 0 || bdot[i].y >= YSIZE) {
 271                         // If the dot has drifted outside the perimeter, kill it
 272                         bdot[i].active = 0;
 273                 }
 274
 275                 if(bdot[i].active) {
 276                         if(first_i < 0)
 277                         first_i = i;
 278                         //last_i = i + 1;
 279                         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)];
 280                         bdot[i].life -= bdot[i].decay;
 281                         bdot[i].x += bdot[i].dx*movementrate;
 282                         bdot[i].y += bdot[i].dy*movementrate + yscroll;
 283
 284                         if(bdot[i].life<0)
 285                         bdot[i].active = 0;
 286                 }
 287         }
 288
 289         if(first_i >= 0) {
 290                 bd1 = first_i;
 291                 bd2 = last_i;
 292         }
 293         else {
 294                 bd1 = 0;
 295                 bd2 = 0;
 296         }
 297
 298 }
 299
 300
 301 void
 302 draw_space_dots(SDL_Surface *s) {
 303         int i;
 304         Uint16 *rawpixel;
 305         rawpixel = (Uint16 *) s->pixels;
 306
 307         for(i = 0; i<MAXSPACEDOTS; i++) {
 308                 if(sdot[i].y<0) {
 309                         sdot[i].y = 0;
 310                 }
 311                 rawpixel[(int)(s->pitch/2*(int)sdot[i].y) + (int)(sdot[i].x)] = sdot[i].color;
 312                 sdot[i].x += sdot[i].dx*movementrate;
 313                 sdot[i].y += yscroll;
 314                 if(sdot[i].y > YSIZE) {
 315                         sdot[i].y -= YSIZE;
 316                 } else if(sdot[i].y < 0) {
 317                         sdot[i].y += YSIZE;
 318                 }
 319                 if(sdot[i].x<0) {
 320                         sdot[i].x = XSIZE;
 321                 }
 322         }
 323 }
 324
 325 void
 326 draw_engine_dots(SDL_Surface *s) {
 327         int i;
 328         Uint16 *rawpixel;
 329         rawpixel = (Uint16 *) s->pixels;
 330
 331         for(i = 0; i<MAXENGINEDOTS; i++) {
 332                 if(edot[i].active) {
 333                         edot[i].x += edot[i].dx*movementrate;
 334                         edot[i].y += edot[i].dy*movementrate + yscroll;
 335                         if((edot[i].life -= movementrate*3)<0 || edot[i].y<0 || edot[i].y>YSIZE) {
 336                                 edot[i].active = 0;
 337                         } else if(edot[i].x<0 || edot[i].x>XSIZE) {
 338                                 edot[i].active = 0;
 339                         } else {
 340                                 int heatindex;
 341                                 heatindex = edot[i].life * 6;
 342                                 //rawpixel[(int)(s->pitch/2*(int)(edot[i].y)) + (int)(edot[i].x)] = lifecolor[(int)(edot[i].life)];
 343                                 rawpixel[(int)(s->pitch/2*(int)(edot[i].y)) + (int)(edot[i].x)] = heatindex>3*W ? heatcolor[3*W-1] : heatcolor[heatindex];
 344                         }
 345                 }
 346         }
 347 }
 348
 349 void
 350 create_engine_dots(int newdots) {
 351         int i;
 352         double theta,r,dx,dy;
 353
 354         if(!tail_plume) return;
 355
 356         if(state == GAMEPLAY) {
 357                 for(i = 0; i<newdots*movementrate; i++) {
 358                         if(dotptr->active == 0) {
 359                                 theta = rnd()*M_PI*2;
 360                                 r = rnd();
 361                                 dx = cos(theta)*r;
 362                                 dy = sin(theta)*r;
 363
 364                                 dotptr->active = 1;
 365                                 dotptr->x = shipx + surf_ship->w/2-14;
 366                                 dotptr->y = shipy + surf_ship->h/2 + (rnd()-0.5)*5-1;
 367                                 dotptr->dx = 10*(dx-1.5) + shipdx;
 368                                 dotptr->dy = 1*dy + shipdy;
 369                                 dotptr->life = 45 + rnd(1)*5;
 370
 371                                 dotptr++;
 372                                 if(dotptr-edot >= MAXENGINEDOTS) {
 373                                         dotptr = edot;
 374                                 }
 375                         }
 376                 }
 377         }
 378 }
 379
 380 void
 381 create_engine_dots2(int newdots, int m) {
 382         int i;
 383         double theta, theta2, dx, dy, adx, ady;
 384
 385         // Don't create fresh engine dots when
 386         // the game is not being played and a demo is not beng shown
 387         if(state != GAMEPLAY) return;
 388
 389         for(i = 0; i<newdots; i++) {
 390                 if(dotptr->active == 0) {
 391                         theta = rnd()*M_PI*2;
 392                         theta2 = rnd()*M_PI*2;
 393
 394                         dx = cos(theta) * fabs(cos(theta2));
 395                         dy = sin(theta) * fabs(cos(theta2));
 396                         adx = fabs(dx);
 397                         ady = fabs(dy);
 398
 399
 400                         dotptr->active = 1;
 401                         dotptr->x = shipx + surf_ship->w/2 + (rnd()-0.5)*3;
 402                         dotptr->y = shipy + surf_ship->h/2 + (rnd()-0.5)*3;
 403
 404                         switch(m) {
 405                                 case 0:
 406                                         dotptr->x -= 14;
 407                                         dotptr->dx = -20*adx + shipdx;
 408                                         dotptr->dy = 2*dy + shipdy;
 409                                         dotptr->life = 60 * adx;
 410                                 break;
 411                                 case 1:
 412                                         dotptr->dx = 2*dx + shipdx;
 413                                         dotptr->dy = -20*ady + shipdy;
 414                                         dotptr->life = 60 * ady;
 415                                 break;
 416                                 case 2:
 417                                         dotptr->x += 14;
 418                                         dotptr->dx = 20*adx + shipdx;
 419                                         dotptr->dy = 2*dy + shipdy;
 420                                         dotptr->life = 60 * adx;
 421                                 break;
 422                                 case 3:
 423                                         dotptr->dx = 2*dx + shipdx;
 424                                         dotptr->dy = 20*ady + shipdy;
 425                                         dotptr->life = 60 * ady;
 426                                 break;
 427                         }
 428                         dotptr++;
 429                         if(dotptr-edot >= MAXENGINEDOTS) {
 430                                 dotptr = edot;
 431                         }
 432                 }
 433         }
 434 }
 435
 436 void
 437 drawdots(SDL_Surface *s) {
 438         int m;
 439
 440         SDL_LockSurface(s);
 441         // Draw the background stars aka space dots
 442         draw_space_dots(s);
 443
 444         // Draw the score when playing the game or whn the game is freshly over
 445         if(1 || state == GAMEPLAY || state == DEAD_PAUSE || state == GAME_OVER ) {
 446                 SDL_UnlockSurface(s);
 447
 448                 snprintscore_line(topline, 50, score);
 449                 SFont_Write(s,g_font,XSIZE-250,0,topline);
 450
 451                 SDL_LockSurface(s);
 452         }
 453
 454         // Draw all the engine dots
 455         draw_engine_dots(s);
 456
 457         // Create more engine dots comin out da back
 458         if(!gameover) create_engine_dots(200);
 459
 460         // Create engine dots out the side we're moving from
 461         for(m = 0; m<4; m++) {
 462                 if(maneuver & 1<<m) { // 'maneuver' is a bit field
 463                         create_engine_dots2(80,m);
 464                 }
 465         }
 466
 467         // Draw all outstanding bang dots
 468         //if(bangdotlife-- > 0)
 469         draw_bang_dots(s);
 470
 471         SDL_UnlockSurface(s);
 472 }
 473
 474                 char a[MAX_PATH_LEN];
 475 int
 476 init(int fullscreen) {
 477
 478         int i,j;
 479         SDL_Surface *temp;
 480         Uint16 *raw_pixels;
 481         Uint32 flag;
 482
 483         // Where are our data files?
 484         if(!find_files()) exit(1);
 485         read_high_score_table();
 486
 487         if(sound_flag) {
 488                 // Initialize SDL with audio and video
 489                 if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) != 0) {
 490                         sound_flag = 0;
 491                         printf ("Can't open sound, starting without it\n");
 492                         atexit(SDL_Quit);
 493                 } else {
 494                         atexit(SDL_Quit);
 495                         atexit(SDL_CloseAudio);
 496                         sound_flag = init_sound();
 497                 }
 498         } else {
 499                 // Initialize with video only
 500                 CONDERROR(SDL_Init(SDL_INIT_VIDEO) != 0);
 501                 atexit(SDL_Quit);
 502         }
 503
 504         play_tune(0);
 505
 506         // Attempt to get the required video size
 507         flag = SDL_DOUBLEBUF | SDL_HWSURFACE;
 508         if(fullscreen) flag |= SDL_FULLSCREEN;
 509         surf_screen = SDL_SetVideoMode(XSIZE,YSIZE,16,flag);
 510
 511         // Set the title bar text
 512         SDL_WM_SetCaption("Variations on Rockdodger", "VoR");
 513
 514         NULLERROR(surf_screen);
 515
 516         // Set the heat color from the range 0 (cold) to 300 (blue-white)
 517         for(i = 0; i<W*3; i++) {
 518                 heatcolor[i] = SDL_MapRGB(
 519                         surf_screen->format,
 520                         (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?
 521                 );
 522         }
 523
 524         // Load the banners
 525         NULLERROR(temp = IMG_Load(add_path("banners/variations.png")));
 526         NULLERROR(surf_b_variations = SDL_DisplayFormat(temp));
 527
 528         NULLERROR(temp = IMG_Load(add_path("banners/on.png")));
 529         NULLERROR(surf_b_on = SDL_DisplayFormat(temp));
 530
 531         NULLERROR(temp = IMG_Load(add_path("banners/rockdodger.png")));
 532         NULLERROR(surf_b_rockdodger = SDL_DisplayFormat(temp));
 533
 534         NULLERROR(temp = IMG_Load(add_path("banners/game.png")));
 535         NULLERROR(surf_b_game = SDL_DisplayFormat(temp));
 536
 537         NULLERROR(temp = IMG_Load(add_path("banners/over.png")));
 538         NULLERROR(surf_b_over = SDL_DisplayFormat(temp));
 539
 540         surf_font_big = IMG_Load(add_path(BIG_FONT_FILE));
 541         g_font = SFont_InitFont(surf_font_big);
 542
 543         // Load the spaceship graphic.
 544         NULLERROR(temp = IMG_Load(add_path("sprites/ship.png")));
 545         NULLERROR(surf_ship = SDL_DisplayFormat(temp));
 546
 547         // Load the life indicator (small ship) graphic.
 548         NULLERROR(temp = IMG_Load(add_path("indicators/life.png")));
 549         NULLERROR(surf_life = SDL_DisplayFormat(temp));
 550
 551         // Create the array of black points;
 552         SDL_LockSurface(surf_ship);
 553         raw_pixels = (Uint16 *) surf_ship->pixels;
 554         for(i = 0; i<surf_ship->w; i++) {
 555                 for(j = 0; j<surf_ship->h; j++) {
 556                         if(raw_pixels[j*(surf_ship->pitch)/2 + i] == 0) {
 557                                 blackptr->x = i;
 558                                 blackptr->y = j;
 559                                 blackptr++;
 560                         }
 561                 }
 562         }
 563
 564         SDL_UnlockSurface(surf_ship);
 565
 566         init_engine_dots();
 567         init_space_dots();
 568
 569         // Load all our lovely rocks
 570         for(i = 0; i<NROCKS; i++) {
 571
 572                 snprintf(a,MAX_PATH_LEN,add_path("sprites/rock%02d.png"),i);
 573                 NULLERROR(temp = IMG_Load(a));
 574                 NULLERROR(surf_rock[i] = SDL_DisplayFormat(temp));
 575                 get_shape(surf_rock[i], &rock_shapes[i]);
 576         }
 577
 578         // Remove the mouse cursor
 579 #ifdef SDL_DISABLE
 580         SDL_ShowCursor(SDL_DISABLE);
 581 #endif
 582
 583         return 0;
 584 }
 585
 586 int
 587 draw() {
 588         int i;
 589         SDL_Rect src,dest;
 590         struct black_point_struct *p;
 591         Uint16 *raw_pixels;
 592         int bang, offset, x;
 593         char *text;
 594         float fadegame,fadeover;
 595
 596         bang = 0;
 597
 598         src.x = 0;
 599         src.y = 0;
 600         dest.x = 0;
 601         dest.y = 0;
 602
 603         // Draw a fully black background
 604         SDL_FillRect(surf_screen,NULL,0);
 605
 606         // Draw the background dots
 607         drawdots(surf_screen);
 608
 609         // Draw ship
 610         if(!gameover && state == GAMEPLAY ) {
 611                 src.w = surf_ship->w;
 612                 src.h = surf_ship->h;
 613                 dest.w = src.w;
 614                 dest.h = src.h;
 615                 dest.x = (int)shipx;
 616                 dest.y = (int)shipy;
 617                 SDL_BlitSurface(surf_ship,&src,surf_screen,&dest);
 618         }
 619
 620         // Draw all the rocks, in all states
 621         for(i = 0; i<MAXROCKS; i++) {
 622                 if(rock[i].active) {
 623
 624                         src.w = rock[i].image->w;
 625                         src.h = rock[i].image->h;
 626                         dest.w = src.w;
 627                         dest.h = src.h;
 628                         dest.x = (int) rock[i].x;
 629                         dest.y = (int) rock[i].y;
 630
 631                         // Draw the rock
 632                         SDL_BlitSurface(rock[i].image,&src,surf_screen,&dest);
 633
 634                 }
 635         }
 636
 637         // If it's game over, show the game over graphic in the dead centre
 638         switch (state) {
 639                 case GAME_OVER:
 640                         if(fadetimer<3.0/faderate) {
 641                                 fadegame = fadetimer/(3.0/faderate);
 642                         } else {
 643                                 fadegame = 1.0;
 644                         }
 645
 646                         if(fadetimer<3.0/faderate) {
 647                                 fadeover = 0.0;
 648                         } else if(fadetimer<6.0/faderate) {
 649                                 fadeover = ((3.0/faderate)-fadetimer)/(6.0/faderate);
 650                         } else {
 651                                 fadeover = 1.0;
 652                         }
 653
 654                         src.w = surf_b_game->w;
 655                         src.h = surf_b_game->h;
 656                         dest.w = src.w;
 657                         dest.h = src.h;
 658                         dest.x = (XSIZE-src.w)/2;
 659                         dest.y = (YSIZE-src.h)/2-40;
 660                         SDL_SetAlpha(surf_b_game, SDL_SRCALPHA, (int)(fadegame*(200 + 55*cos(fadetimer += movementrate/1.0))));
 661                         SDL_BlitSurface(surf_b_game,&src,surf_screen,&dest);
 662
 663                         src.w = surf_b_over->w;
 664                         src.h = surf_b_over->h;
 665                         dest.w = src.w;
 666                         dest.h = src.h;
 667                         dest.x = (XSIZE-src.w)/2;
 668                         dest.y = (YSIZE-src.h)/2 + 40;
 669                         SDL_SetAlpha(surf_b_over, SDL_SRCALPHA, (int)(fadeover*(200 + 55*sin(fadetimer))));
 670                         SDL_BlitSurface(surf_b_over,&src,surf_screen,&dest);
 671                 break;
 672
 673                 case TITLE_PAGE:
 674
 675                         src.w = surf_b_variations->w;
 676                         src.h = surf_b_variations->h;
 677                         dest.w = src.w;
 678                         dest.h = src.h;
 679                         dest.x = (XSIZE-src.w)/2 + cos(fadetimer/6.5)*10;
 680                         dest.y = (YSIZE/2-src.h)/2 + sin(fadetimer/5.0)*10;
 681                         SDL_SetAlpha(surf_b_variations, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer += movementrate/2.0)));
 682                         SDL_BlitSurface(surf_b_variations,&src,surf_screen,&dest);
 683
 684                         src.w = surf_b_on->w;
 685                         src.h = surf_b_on->h;
 686                         dest.w = src.w;
 687                         dest.h = src.h;
 688                         dest.x = (XSIZE-src.w)/2 + cos((fadetimer + 1.0)/6.5)*10;
 689                         dest.y = (YSIZE/2-src.h)/2 + surf_b_variations->h + 20 + sin((fadetimer + 1.0)/5.0)*10;
 690                         SDL_SetAlpha(surf_b_on, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-1.0)));
 691                         SDL_BlitSurface(surf_b_on,&src,surf_screen,&dest);
 692
 693                         src.w = surf_b_rockdodger->w;
 694                         src.h = surf_b_rockdodger->h;
 695                         dest.w = src.w;
 696                         dest.h = src.h;
 697                         dest.x = (XSIZE-src.w)/2 + cos((fadetimer + 2.0)/6.5)*10;
 698                         dest.y = (YSIZE/2-src.h)/2 + surf_b_variations->h + surf_b_on->h + 40 + sin((fadetimer + 2.0)/5)*10;
 699                         SDL_SetAlpha(surf_b_rockdodger, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-2.0)));
 700                         SDL_BlitSurface(surf_b_rockdodger,&src,surf_screen,&dest);
 701
 702                         text = "Version " VERSION;
 703                         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + sin(fadetimer/4.5)*10;
 704                         SFont_Write(surf_screen,g_font,x,YSIZE-50 + sin(fadetimer/2)*5,text);
 705
 706                         text = sequence[(int)(fadetimer/40)%NSEQUENCE];
 707                         //text = "Press SPACE to start!";
 708                         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + cos(fadetimer/4.5)*10;
 709                         SFont_Write(surf_screen,g_font,x,YSIZE-100 + cos(fadetimer/3)*5,text);
 710                 break;
 711
 712                 case HIGH_SCORE_ENTRY:
 713                         play_tune(2);
 714                         if(!process_score_input()) {  // done inputting name
 715
 716                                 // Change state to briefly show high scores page
 717                                 state = HIGH_SCORE_DISPLAY;
 718                                 state_timeout = 200;
 719
 720                                 // Write the high score table to the file
 721                                 write_high_score_table();
 722
 723                                 // Play the title page tune
 724                                 play_tune(0);
 725                         }
 726                 // FALL THROUGH TO
 727                 case HIGH_SCORE_DISPLAY:
 728                         // Display de list o high scores mon.
 729                         display_scores(surf_screen, 150,50);
 730                         break;
 731                 case GAMEPLAY:
 732                 case DEAD_PAUSE:
 733                         ; // no action necessary
 734         }
 735
 736         if(!gameover && state == GAMEPLAY) {
 737                 SDL_LockSurface(surf_screen);
 738                 raw_pixels = (Uint16 *) surf_screen->pixels;
 739                 // Check that the black points on the ship are
 740                 // still black, and not covered up by rocks.
 741                 for(p = black_point; p<blackptr; p++) {
 742                         offset = surf_screen->pitch/2 * (p->y + (int)shipy) + p->x + (int)shipx;
 743                         if(raw_pixels[offset]) {
 744                                 // Set the bang flag
 745                                 bang = 1;
 746                         }
 747                 }
 748                 SDL_UnlockSurface(surf_screen);
 749         }
 750
 751         // Draw all the little ships
 752         if(state == GAMEPLAY || state == DEAD_PAUSE || state == GAME_OVER)
 753         for(i = 0; i<nships-1; i++) {
 754                 src.w = surf_life->w;
 755                 src.h = surf_life->h;
 756                 dest.w = src.w;
 757                 dest.h = src.h;
 758                 dest.x = (i + 1)*(src.w + 10);
 759                 dest.y = 20;
 760                 SDL_BlitSurface(surf_life,&src,surf_screen,&dest);
 761         }
 762
 763
 764         // Update the score
 765         /*
 766         n = SDL_GetTicks()-initticks;
 767         if(score)
 768         ticks_since_last = n-score;
 769         score = n;
 770         */
 771
 772         ticks_since_last = SDL_GetTicks()-last_ticks;
 773         last_ticks = SDL_GetTicks();
 774         if(ticks_since_last>200 || ticks_since_last<0) {
 775                 movementrate = 0;
 776         }
 777         else {
 778                 movementrate = ticks_since_last/50.0;
 779                 if(state == GAMEPLAY) {
 780                         score += ticks_since_last;
 781                 }
 782         }
 783
 784         // Update the surface
 785         SDL_Flip(surf_screen);
 786
 787
 788         return bang;
 789 }
 790
 791 int
 792 gameloop() {
 793         int i = 0;
 794         Uint8 *keystate;
 795
 796
 797         for(;;) {
 798                 if(!paused) {
 799                         // Count down the game loop timer, and change state when it gets to zero or less;
 800
 801                         if((state_timeout -= movementrate*3) < 0) {
 802                                 switch(state) {
 803                                         case DEAD_PAUSE:
 804                                                 // Create a new ship and start all over again
 805                                                 state = GAMEPLAY;
 806                                                 play_tune(1);
 807                                                 shipx -= 50;
 808                                                 break;
 809                                         case GAME_OVER:
 810                                                 state = HIGH_SCORE_ENTRY;
 811                                                 state_timeout = 5.0e6;
 812                                                 if(new_high_score(score)) {
 813                                                         SDL_Event e;
 814                                                         SDL_EnableUNICODE(1);
 815                                                         while(SDL_PollEvent(&e))
 816                                                                 ;
 817                                                 } else {
 818                                                         state = HIGH_SCORE_DISPLAY;
 819                                                         state_timeout = 400;
 820                                                 }
 821                                                 break;
 822                                         case HIGH_SCORE_DISPLAY:
 823                                                 state = TITLE_PAGE;
 824                                                 state_timeout = 500.0;
 825                                                 break;
 826                                         case HIGH_SCORE_ENTRY:
 827                                                 // state = TITLE_PAGE;
 828                                                 // play_tune(1);
 829                                                 // state_timeout = 100.0;
 830                                                 break;
 831                                         case TITLE_PAGE:
 832                                                 state = HIGH_SCORE_DISPLAY;
 833                                                 state_timeout = 200.0;
 834                                                 break;
 835                                         case GAMEPLAY:
 836                                                 ; // no action necessary
 837                                 }
 838                         } else {
 839                                 if(state == DEAD_PAUSE) {
 840                                         float blast_radius;
 841                                         int fixonly;
 842
 843                                         if(state_timeout < DEAD_PAUSE_LENGTH - 20.0) {
 844                                                 blast_radius = BLAST_RADIUS * 1.3;
 845                                                 fixonly = 1;
 846                                         } else {
 847                                                 blast_radius = BLAST_RADIUS * (DEAD_PAUSE_LENGTH - state_timeout) / 20.0;
 848                                                 fixonly = 0;
 849                                         }
 850
 851                                         if(shipx < 60) shipx = 60;
 852                                         for(i = 0; i<MAXROCKS; i++ ) {
 853                                                 float dx, dy, n;
 854                                                 if(rock[i].x <= 0) continue;
 855
 856                                                 // This makes it so your explosion from dying magically doesn't leave
 857                                                 // any rocks that aren't moving much on the x axis. After the first
 858                                                 // 20 tics, only rocks that are barely moving will be pushed.
 859                                                 if(fixonly && (!rock[i].dead || rock[i].dx < -4 || rock[i].dx > 3)) {
 860                                                         continue;
 861                                                 }
 862
 863                                                 dx = rock[i].x - shipx;
 864                                                 dy = rock[i].y - shipy;
 865
 866                                                 n = sqrt(dx*dx + dy*dy);
 867                                                 if(n < blast_radius) {
 868                                                         n *= 20;
 869                                                         rock[i].dx += rockrate*(dx+30)/n;
 870                                                         rock[i].dy += rockrate*dy/n;
 871                                                         rock[i].dead = 1;
 872                                                 }
 873                                         }
 874                                 }
 875                         }
 876
 877                         if(--countdown <= 0 && (rnd()*100.0<(rockrate += 0.025))) {
 878                                 // Create a rock
 879                                 rockptr++;
 880                                 if(rockptr-rock >= MAXROCKS) {
 881                                         rockptr = rock;
 882                                 }
 883                                 if(!rockptr->active) {
 884                                         rockptr->x = (float)XSIZE;
 885                                         rockptr->dx = -(rockspeed)*(1 + rnd());
 886                                         rockptr->dy = rnd()-0.5;
 887                                         rockptr->type_number = random() % NROCKS;
 888                                         rockptr->image = surf_rock[rockptr->type_number];// [random()%NROCKS];
 889                                         rockptr->active = 1;
 890                                         rockptr->y = rnd()*(YSIZE + rockptr->image->h);
 891                                 }
 892                                 if(movementrate>0.1) {
 893                                         countdown = (int)(ROCKRATE/movementrate);
 894                                 } else {
 895                                         countdown = 0;
 896                                 }
 897                         }
 898
 899                         // FRICTION?
 900                         if(friction) {
 901                                 shipdx *= pow((double)0.9,(double)movementrate);
 902                                 shipdy *= pow((double)0.9,(double)movementrate);
 903                                 // if(abs(shipdx)<0.00001) shipdx = 0;
 904                                 // if(abs(shipdy)<0.00001) shipdy = 0;
 905                         }
 906
 907                         // INERTIA
 908                         shipx += shipdx*movementrate;
 909                         shipy += shipdy*movementrate;
 910
 911                         // SCROLLING
 912                         yscroll = shipy - (YSIZE / 2);
 913                         yscroll += shipdy * 25;
 914                         yscroll /= -25;
 915                         yscroll = ((scrollvel * (12 - movementrate)) + (yscroll * movementrate)) / 12;
 916                         scrollvel = yscroll;
 917                         yscroll = yscroll*movementrate;
 918                         shipy += yscroll;
 919
 920                         // Move all the rocks
 921                         for(i = 0; i < MAXROCKS; i++) {
 922                                 if(rock[i].active) {
 923                                         rock[i].x += rock[i].dx*movementrate;
 924                                         rock[i].y += rock[i].dy*movementrate + yscroll;
 925                                         if(rock[i].y > YSIZE || rock[i].y < -rock[i].image->h) {
 926                                                 if(rock[i].dead) {
 927                                                         rock[i].dead = 0;
 928                                                         rock[i].active = 0;
 929                                                 } else {
 930                                                         // wrap
 931                                                         rock[i].y = (YSIZE - rock[i].image->h) - rock[i].y;
 932                                                         rock[i].y += (rock[i].dy*movementrate + yscroll) * 1.01;
 933                                                 }
 934                                         }
 935                                         if(rock[i].x < -rock[i].image->w || rock[i].x > XSIZE) {
 936                                                 rock[i].active = 0;
 937                                                 rock[i].dead = 0;
 938                                         }
 939                                 }
 940                         }
 941
 942
 943                         // BOUNCE X
 944                         if(shipx<0 || shipx>XSIZE-surf_ship->w) {
 945                                 // BOUNCE from left and right wall
 946                                 shipx -= shipdx*movementrate;
 947                                 shipdx *= -0.99;
 948                         }
 949
 950                         // BOUNCE Y
 951                         if(shipy<0 || shipy>YSIZE-surf_ship->h) {
 952                                 // BOUNCE from top and bottom wall
 953                                 shipy -= shipdy;
 954                                 shipdy *= -0.99;
 955                         }
 956
 957
 958                         if(draw() && state == GAMEPLAY) {
 959                                 // Play the explosion sound
 960                                 play_sound(0);
 961                                 makebangdots(shipx,shipy,shipdx,shipdy,surf_ship,30);
 962                                 if(--nships <= 0) {
 963                                         gameover = 1;
 964                                         state = GAME_OVER;
 965                                         state_timeout = 200.0;
 966                                         fadetimer = 0.0;
 967                                         faderate = movementrate;
 968                                 }
 969                                 else {
 970                                         state = DEAD_PAUSE;
 971                                         state_timeout = DEAD_PAUSE_LENGTH;
 972                                         shipdx = 0;
 973                                         shipdy = 0;
 974                                 }
 975                         }
 976
 977                         SDL_PumpEvents();
 978                         keystate = SDL_GetKeyState(NULL);
 979
 980                         if(state != HIGH_SCORE_ENTRY && (keystate[SDLK_q] || keystate[SDLK_ESCAPE])) {
 981                                 return 0;
 982                         }
 983
 984                         if(keystate[SDLK_SPACE] && (state == HIGH_SCORE_DISPLAY || state == TITLE_PAGE)) {
 985
 986                                 for(i = 0; i<MAXROCKS; i++ ) {
 987                                         rock[i].active = 0;
 988                                         rock[i].dead = 0;
 989                                 }
 990
 991                                 rockrate = 54.0;
 992                                 rockspeed = 5.0;
 993
 994                                 nships = 4;
 995                                 score = 0;
 996
 997                                 state = GAMEPLAY;
 998                                 play_tune(1);
 999
1000                                 gameover = 0;
1001                                 shipx = 0;
1002                                 shipy = YSIZE/2;
1003                                 shipdx = -1;
1004                                 shipdy = 0;
1005                         }
1006
1007                         maneuver = 0;
1008                 } else {
1009                         SDL_PumpEvents();
1010                         keystate = SDL_GetKeyState(NULL);
1011                 }
1012
1013                 if(state == GAMEPLAY) {
1014                         if(!gameover) {
1015
1016                                 if(!paused) {
1017                                         if(keystate[SDLK_UP] | keystate[SDLK_c])                { shipdy -= 1.5*movementrate; maneuver |= 1<<3;}
1018                                         if(keystate[SDLK_DOWN] | keystate[SDLK_t])              { shipdy += 1.5*movementrate; maneuver |= 1<<1;}
1019                                         if(keystate[SDLK_LEFT] | keystate[SDLK_h])              { shipdx -= 1.5*movementrate; maneuver |= 1<<2;}
1020                                         if(keystate[SDLK_RIGHT] | keystate[SDLK_n])             { shipdx += 1.5*movementrate; maneuver |= 1;}
1021                                         if(keystate[SDLK_3])            { SDL_SaveBMP(surf_screen, "snapshot.bmp"); }
1022                                 }
1023
1024                                 if(keystate[SDLK_p] | keystate[SDLK_s]) {
1025                                         if(!pausedown) {
1026                                                 paused = !paused;
1027                                                 pausedown = 1;
1028                                         }
1029                                 } else {
1030                                         pausedown = 0;
1031                                 }
1032
1033                         }
1034                         else {
1035                                 paused = 0;
1036                                 pausedown = 0;
1037                         }
1038                 } else if(state == GAME_OVER) {
1039                         if(keystate[SDLK_SPACE]) {
1040                                 state_timeout = -1;
1041                         }
1042                 }
1043         }
1044 }
1045
1046 int
1047 main(int argc, char **argv) {
1048         int i, x, fullscreen;
1049
1050         fullscreen = 0;
1051         tail_plume = 0;
1052         friction = 0;
1053         sound_flag = 1;
1054         music_flag = 0;
1055
1056         while ((x = getopt(argc,argv,"efhmps")) >= 0) {
1057                 switch(x) {
1058                         case 'e': // engine
1059                                 tail_plume = 1;
1060                         break;
1061                         case 'f': // fullscreen
1062                                 fullscreen = 1;
1063                         break;
1064                         case 'h': // help
1065                                 printf("Variations on RockDodger\n"
1066                                        " -e big tail [E]ngine\n"
1067                                        " -f [F]ull screen\n"
1068                                        " -h this [H]elp message\n"
1069                                        " -m enable [M]usic\n"
1070                                        " -p original [P]hysics (friction)\n"
1071                                        " -s [S]ilent (no sound)\n");
1072                                 exit(0);
1073                         break;
1074                         case 'm': // music
1075                                 music_flag = 1;
1076                         case 'p': // physics
1077                                 friction = 1;
1078                         break;
1079                         case 's': // silent
1080                                 sound_flag = 0;
1081                                 music_flag = 0;
1082                         break;
1083                 }
1084         }
1085
1086         if(init(fullscreen)) {
1087                 printf ("ta: '%s'\n",initerror);
1088                 return 1;
1089         }
1090
1091         for(i = 0; i<MAXROCKS; i++) {
1092                 rock[i].active = 0;
1093                 rock[i].dead = 0;
1094         }
1095         rockrate = 54.0;
1096         rockspeed = 5.0;
1097         initticks = SDL_GetTicks();
1098         gameloop();
1099
1100         return 0;
1101 }