1 /* Variations on RockDodger
2 * Space Rocks copyright (C) 2001 Paul Holt <pad@pcholt.com>
4 * Project fork 2004, Jason Woofenden and Joshua Grams.
5 * (a whole bunch of modifications and project rename)
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.
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.
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
25 #include <SDL_image.h>
45 // ************************************* VARS
46 // SDL_Surface global variables
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_life, // Indicator of number of ships remaining
55 *surf_rock[NROCKS], // THE ROCKS
56 *surf_font_big; // The big font
61 // Structure global variables
62 struct enginedots edot[MAXENGINEDOTS], *dotptr = edot;
63 struct bangdots bdot[MAXBANGDOTS], *bdotptr = bdot;
65 // Other global variables
69 struct ship ship = { SHIP, 0, NULL, XSIZE/2, YSIZE/2, SCREENDXMIN, 0.0 };
71 float screendx = SCREENDXMIN, screendy = 0.0;
72 float xscroll, yscroll;
75 // all movement is based on t_frame.
76 float t_frame; // length of this frame (in ticks = 1/20th second)
77 int ms_frame; // length of this frame (milliseconds)
78 int ms_end; // end of this frame (milliseconds)
81 float bangx, bangy, bangdx, bangdy;
85 float fadetimer = 0, faderate;
87 int pausedown = 0, paused = 0;
89 // bangdot start (bd1) and end (bd2) position:
100 enum states state = TITLE_PAGE;
101 float state_timeout = 600.0;
105 "Press SPACE to start",
106 "http://jasonwoof.org/vor"
109 int bangdotlife, nbangdots;
110 Uint16 heatcolor[W*3];
114 extern int optind, opterr, optopt;
116 #define TO_TICKS(seconds) ((seconds)*20*opt_gamespeed)
118 // ************************************* FUNCS
123 for(i = 0; i<MAXENGINEDOTS; i++) {
129 new_bang_dots(int xbang, int ybang, int dx, int dy, SDL_Surface *s)
138 begin_generate = SDL_GetTicks();
140 row_inc = s->pitch/sizeof(uint16_t) - s->w;
141 colorkey = s->format->colorkey;
148 for(y=0; y<s->h; y++) {
149 for(x = 0; x<s->w; x++) {
151 if(c && c != colorkey) {
152 theta = frnd()*M_PI*2;
153 r = frnd(); r = 1 - r*r;
154 // r = 1 - frnd()*frnd();
156 bdot[bd2].dx = 45*r*cos(theta) + dx;
157 bdot[bd2].dy = 45*r*sin(theta) + dy;
158 bdot[bd2].x = x + xbang;
159 bdot[bd2].y = y + ybang;
161 bdot[bd2].life = 100;
162 bdot[bd2].decay = frnd()*3 + 1;
163 bdot[bd2].active = 1;
165 // Replace the last few bang dots with the pixels from the exploding object
166 if(endcount>0) bdot[bd2].c = c;
168 bd2 = (bd2+1) % MAXBANGDOTS;
173 if(SDL_GetTicks() - begin_generate > 7) endcount++;
176 SDL_UnlockSurface(s);
180 draw_bang_dots(SDL_Surface *s)
184 uint16_t *pixels, *pixel, c;
185 int row_inc = s->pitch/sizeof(uint16_t);
187 pixels = (uint16_t *) s->pixels;
191 for(i=0; i<MAXBANGDOTS; i++) {
192 if(!bdot[i].active) continue;
194 // decrement life and maybe kill
195 bdot[i].life -= bdot[i].decay;
196 if(bdot[i].life<0) { bdot[i].active = 0; continue; }
199 bdot[i].x += bdot[i].dx*t_frame - xscroll;
200 bdot[i].y += bdot[i].dy*t_frame - yscroll;
201 if(bdot[i].x < 0 || bdot[i].x >= XSIZE || bdot[i].y < 0 || bdot[i].y >= YSIZE) {
207 if(pixel_collides(bdot[i].x, bdot[i].y)) { bdot[i].active = 0; continue; }
209 pixel = pixels + row_inc*(int)(bdot[i].y) + (int)(bdot[i].x);
210 if(bdot[i].c) c = bdot[i].c; else c = heatcolor[(int)(bdot[i].life)*3];
217 new_engine_dots(int n, int dir) {
219 float a, r; // angle, random length
221 float hx, hy; // half ship width/height.
222 static const int s[4] = { 2, 1, 0, 1 };
224 hx = ship.image->w / 2;
225 hy = ship.image->h / 2;
227 for(i = 0; i<n; i++) {
228 if(dotptr->active == 0) {
229 a = frnd()*M_PI + (dir-1)*M_PI_2;
230 r = sin(frnd()*M_PI);
232 dy = r * -sin(a); // screen y is "backwards".
235 dotptr->x = ship.x + s[dir]*hx + (frnd()-0.5)*3;
236 dotptr->y = ship.y + s[(dir+1)&3]*hy + (frnd()-0.5)*3;
238 dotptr->dx = ship.dx + 2*dx;
239 dotptr->dy = ship.dy + 20*dy;
240 dotptr->life = 60 * fabs(dy);
242 dotptr->dx = ship.dx + 20*dx;
243 dotptr->dy = ship.dy + 2*dy;
244 dotptr->life = 60 * fabs(dx);
247 if(dotptr - edot < MAXENGINEDOTS-1) dotptr++;
254 draw_engine_dots(SDL_Surface *s) {
257 uint16_t *pixels = (uint16_t *) s->pixels;
258 int row_inc = s->pitch/sizeof(uint16_t);
261 for(i = 0; i<MAXENGINEDOTS; i++) {
262 if(!edot[i].active) continue;
263 edot[i].x += edot[i].dx*t_frame - xscroll;
264 edot[i].y += edot[i].dy*t_frame - yscroll;
265 edot[i].life -= t_frame*3;
267 || edot[i].x<0 || edot[i].x >= XSIZE
268 || edot[i].y<0 || edot[i].y >= YSIZE) {
272 if(pixel_collides(edot[i].x, edot[i].y)) { edot[i].active = 0; continue; }
273 heatindex = edot[i].life * 6;
274 c = heatindex>3*W ? heatcolor[3*W-1] : heatcolor[heatindex];
275 pixels[row_inc*(int)(edot[i].y) + (int)(edot[i].x)] = c;
280 drawdots(SDL_Surface *s) {
283 // Create engine dots out the side we're moving from
284 for(m = 0; m<4; m++) {
285 if(ship.jets & 1<<m) { // 'jets' is a bit field
286 new_engine_dots(80,m);
296 SDL_UnlockSurface(s);
300 load_image(char *filename)
302 SDL_Surface *tmp, *img = NULL;
303 char *s = add_data_path(filename);
308 img = SDL_DisplayFormat(tmp);
309 SDL_FreeSurface(tmp);
318 load_sprite(SPRITE(&ship), "sprites/ship.png");
328 // Where are our data files?
329 if(!find_files()) exit(1);
330 read_high_score_table();
333 // Initialize SDL with audio and video
334 if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) != 0) {
336 fputs("Can't open sound, starting without it\n", stderr);
340 atexit(SDL_CloseAudio);
341 opt_sound = init_sound();
344 // Initialize with video only
345 CONDERROR(SDL_Init(SDL_INIT_VIDEO) != 0);
349 play_tune(TUNE_TITLE_PAGE);
351 // Attempt to get the required video size
352 flag = SDL_DOUBLEBUF | SDL_HWSURFACE;
353 if(opt_fullscreen) flag |= SDL_FULLSCREEN;
354 surf_screen = SDL_SetVideoMode(XSIZE,YSIZE,16,flag);
356 // Set the title bar text
357 SDL_WM_SetCaption("Variations on Rockdodger", "VoR");
359 NULLERROR(surf_screen);
361 // Set the heat color from the range 0 (cold) to 300 (blue-white)
362 for(i = 0; i<W*3; i++) {
363 heatcolor[i] = SDL_MapRGB(
365 (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?
370 NULLERROR(surf_b_variations = load_image("banners/variations.png"));
371 NULLERROR(surf_b_on = load_image("banners/on.png"));
372 NULLERROR(surf_b_rockdodger = load_image("banners/rockdodger.png"));
374 NULLERROR(surf_b_game = load_image("banners/game.png"));
375 NULLERROR(surf_b_over = load_image("banners/over.png"));
377 // Load the life indicator (small ship) graphic.
378 NULLERROR(surf_life = load_image("indicators/life.png"));
380 // Load the font image
381 s = add_data_path(BIG_FONT_FILE);
383 NULLERROR(surf_font_big = IMG_Load(s));
385 g_font = SFont_InitFont(surf_font_big);
392 add_sprite(SPRITE(&ship));
394 // Remove the mouse cursor
396 SDL_ShowCursor(SDL_DISABLE);
408 for(i=0; i<ship.lives-1; i++) {
409 dest.x = (i + 1)*(surf_life->w + 10);
411 SDL_BlitSurface(surf_life, NULL, surf_screen, &dest);
420 float fadegame,fadeover;
422 SDL_FillRect(surf_screen,NULL,0); // black background
423 drawdots(surf_screen); // background dots
424 draw_sprite(SPRITE(&ship));
430 // If it's game over, show the game over graphic in the dead centre
433 if(fadetimer<3.0/faderate) {
434 fadegame = fadetimer/(3.0/faderate);
439 if(fadetimer<3.0/faderate) {
441 } else if(fadetimer<6.0/faderate) {
442 fadeover = ((3.0/faderate)-fadetimer)/(6.0/faderate);
447 dest.x = (XSIZE-surf_b_game->w)/2;
448 dest.y = (YSIZE-surf_b_game->h)/2-40;
449 SDL_SetAlpha(surf_b_game, SDL_SRCALPHA, (int)(fadegame*(200 + 55*cos(fadetimer += t_frame/1.0))));
450 SDL_BlitSurface(surf_b_game,NULL,surf_screen,&dest);
452 dest.x = (XSIZE-surf_b_over->w)/2;
453 dest.y = (YSIZE-surf_b_over->h)/2 + 40;
454 SDL_SetAlpha(surf_b_over, SDL_SRCALPHA, (int)(fadeover*(200 + 55*sin(fadetimer))));
455 SDL_BlitSurface(surf_b_over,NULL,surf_screen,&dest);
460 dest.x = (XSIZE-surf_b_variations->w)/2 + cos(fadetimer/6.5)*10;
461 dest.y = (YSIZE/2-surf_b_variations->h)/2 + sin(fadetimer/5.0)*10;
462 SDL_SetAlpha(surf_b_variations, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer += t_frame/2.0)));
463 SDL_BlitSurface(surf_b_variations,NULL,surf_screen,&dest);
465 dest.x = (XSIZE-surf_b_on->w)/2 + cos((fadetimer + 1.0)/6.5)*10;
466 dest.y = (YSIZE/2-surf_b_on->h)/2 + surf_b_variations->h + 20 + sin((fadetimer + 1.0)/5.0)*10;
467 SDL_SetAlpha(surf_b_on, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-1.0)));
468 SDL_BlitSurface(surf_b_on,NULL,surf_screen,&dest);
470 dest.x = (XSIZE-surf_b_rockdodger->w)/2 + cos((fadetimer + 2.0)/6.5)*10;
471 dest.y = (YSIZE/2-surf_b_rockdodger->h)/2 + surf_b_variations->h + surf_b_on->h + 40 + sin((fadetimer + 2.0)/5)*10;
472 SDL_SetAlpha(surf_b_rockdodger, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-2.0)));
473 SDL_BlitSurface(surf_b_rockdodger,NULL,surf_screen,&dest);
475 text = "Version " VERSION;
476 x = (XSIZE-SFont_TextWidth(g_font,text))/2 + sin(fadetimer/4.5)*10;
477 SFont_Write(surf_screen,g_font,x,YSIZE-50 + sin(fadetimer/2)*5,text);
479 text = sequence[(int)(fadetimer/40)%NSEQUENCE];
480 //text = "Press SPACE to start!";
481 x = (XSIZE-SFont_TextWidth(g_font,text))/2 + cos(fadetimer/4.5)*10;
482 SFont_Write(surf_screen,g_font,x,YSIZE-100 + cos(fadetimer/3)*5,text);
485 case HIGH_SCORE_ENTRY:
486 play_tune(TUNE_HIGH_SCORE_ENTRY);
487 if(!process_score_input()) { // done inputting name
489 // Change state to briefly show high scores page
490 state = HIGH_SCORE_DISPLAY;
493 // Write the high score table to the file
494 write_high_score_table();
496 play_tune(TUNE_TITLE_PAGE);
499 case HIGH_SCORE_DISPLAY:
500 // Display de list o high scores mon.
501 display_scores(surf_screen, 150,50);
505 ; // no action necessary
510 ms_frame = SDL_GetTicks() - ms_end;
512 t_frame = opt_gamespeed * ms_frame / 50;
513 if(state == GAMEPLAY) score += ms_frame;
515 // Update the surface
516 SDL_Flip(surf_screen);
520 kill_ship(Sprite *ship)
522 ship->flags = MOVE|DRAW;
523 SDL_SetAlpha(ship->image, SDL_SRCALPHA, 0);
528 do_collision(Sprite *a, Sprite *b)
530 if(a->type == SHIP) kill_ship(a);
531 else if (b->type == SHIP) kill_ship(b);
537 Uint8 *keystate = SDL_GetKeyState(NULL);
543 keystate = SDL_GetKeyState(NULL);
546 // Count down the game loop timer, and change state when it gets to zero or less;
548 if((state_timeout -= t_frame*3) < 0) {
551 // Restore the ship and continue playing
552 ship.flags = DRAW|MOVE|COLLIDE;
554 play_tune(TUNE_GAMEPLAY);
557 if(new_high_score(score)) {
559 state = HIGH_SCORE_ENTRY;
560 state_timeout = 5.0e6;
561 SDL_EnableUNICODE(1);
562 while(SDL_PollEvent(&e))
565 state = HIGH_SCORE_DISPLAY;
569 case HIGH_SCORE_DISPLAY:
571 state_timeout = 500.0;
573 case HIGH_SCORE_ENTRY:
576 state = HIGH_SCORE_DISPLAY;
577 state_timeout = 200.0;
580 ; // no action necessary
583 if(state == DEAD_PAUSE) {
584 float blast_radius, alpha;
585 if(state_timeout >= DEAD_PAUSE_LENGTH - 20.0) {
586 blast_radius = BLAST_RADIUS * (DEAD_PAUSE_LENGTH - state_timeout) / 20.0;
587 blast_rocks(bangx, bangy, blast_radius);
590 if(bangx < 60) bangx = 60;
592 alpha = 255.0 * (DEAD_PAUSE_LENGTH - state_timeout) / DEAD_PAUSE_LENGTH;
593 SDL_SetAlpha(ship.image, SDL_SRCALPHA, (uint8_t)alpha);
600 tmp = (ship.y+ship.dy*t_frame-YSCROLLTO)/25 + (ship.dy-screendy);
601 screendy += tmp * t_frame/12;
602 tmp = (ship.x+ship.dx*t_frame-XSCROLLTO)/25 + (ship.dx-screendx);
603 screendx += tmp * t_frame/12;
604 // taper off so we don't hit the barrier abruptly.
605 // (if we would hit in < 2 seconds, adjust to 2 seconds).
606 if(back_dist + (screendx - SCREENDXMIN)*TO_TICKS(2) < 0) {
607 screendx = SCREENDXMIN - (back_dist/TO_TICKS(2));
610 back_dist += (screendx - SCREENDXMIN)*t_frame;
611 if(opt_max_lead >= 0) back_dist = min(back_dist, opt_max_lead);
613 xscroll = screendx * t_frame;
614 yscroll = screendy * t_frame;
617 bangx += bangdx*t_frame - xscroll;
618 bangy += bangdy*t_frame - yscroll;
623 // BOUNCE off left or right edge of screen
624 if(ship.x < 0 || ship.x+ship.w > XSIZE) {
625 ship.x -= (ship.dx-screendx)*t_frame;
626 ship.dx = screendx - (ship.dx-screendx)*opt_bounciness;
629 // BOUNCE off top or bottom of screen
630 if(ship.y < 0 || ship.y+ship.h > YSIZE) {
631 ship.y -= (ship.dy-screendy)*t_frame;
632 ship.dy = screendy - (ship.dy-screendy)*opt_bounciness;
637 if(state == GAMEPLAY && bang) {
640 play_sound(SOUND_BANG); // Play the explosion sound
641 bangx = ship.x; bangy = ship.y; bangdx = ship.dx; bangdy = ship.dy;
642 new_bang_dots(ship.x,ship.y,ship.dx,ship.dy,ship.image);
643 ship.dx *= 0.5; ship.dy *= 0.5;
644 if(ship.dx < SCREENDXMIN) ship.dx = SCREENDXMIN;
645 if(--ship.lives <= 0) {
647 ship.dx = SCREENDXMIN; ship.dy = 0;
648 state_timeout = 200.0;
653 state_timeout = DEAD_PAUSE_LENGTH;
658 if(keystate[SDLK_SPACE]
659 && (state == HIGH_SCORE_DISPLAY
660 || state == TITLE_PAGE
661 || state == GAME_OVER)) {
665 ship.x = XSIZE/2.2; ship.y = YSIZE/2;
666 ship.dx = screendx; ship.dy = screendy;
668 ship.flags = MOVE|DRAW|COLLIDE;
669 SDL_SetAlpha(ship.image, SDL_SRCALPHA, SDL_ALPHA_OPAQUE);
670 add_sprite(SPRITE(&ship));
675 play_tune(TUNE_GAMEPLAY);
681 if(state == GAMEPLAY || state == DEAD_PAUSE) {
683 if(keystate[SDLK_LEFT] | keystate[SDLK_h]) { ship.dx -= 1.5*t_frame; ship.jets |= 1<<0;}
684 if(keystate[SDLK_DOWN] | keystate[SDLK_t]) { ship.dy += 1.5*t_frame; ship.jets |= 1<<1;}
685 if(keystate[SDLK_RIGHT] | keystate[SDLK_n]) { ship.dx += 1.5*t_frame; ship.jets |= 1<<2;}
686 if(keystate[SDLK_UP] | keystate[SDLK_c]) { ship.dy -= 1.5*t_frame; ship.jets |= 1<<3;}
687 if(keystate[SDLK_3]) { SDL_SaveBMP(surf_screen, "snapshot.bmp"); }
690 if(keystate[SDLK_p] | keystate[SDLK_s]) {
694 if(!paused) ms_end = SDL_GetTicks();
701 if(state != HIGH_SCORE_ENTRY && (keystate[SDLK_q] || keystate[SDLK_ESCAPE]))
708 main(int argc, char **argv) {
710 argp_parse(&argp, argc, argv, 0, 0, 0);
713 printf ("ta: '%s'\n",initerror);