4efb3868 |
1 | /* |
2 | * sixteen.c: `16-puzzle', a sliding-tiles jigsaw which differs |
3 | * from the 15-puzzle in that you toroidally rotate a row or column |
4 | * at a time. |
5 | */ |
6 | |
7 | #include <stdio.h> |
8 | #include <stdlib.h> |
9 | #include <string.h> |
10 | #include <assert.h> |
b0e26073 |
11 | #include <ctype.h> |
4efb3868 |
12 | #include <math.h> |
13 | |
14 | #include "puzzles.h" |
15 | |
4efb3868 |
16 | #define TILE_SIZE 48 |
17 | #define BORDER TILE_SIZE /* big border to fill with arrows */ |
18 | #define HIGHLIGHT_WIDTH (TILE_SIZE / 20) |
19 | #define COORD(x) ( (x) * TILE_SIZE + BORDER ) |
20 | #define FROMCOORD(x) ( ((x) - BORDER + 2*TILE_SIZE) / TILE_SIZE - 2 ) |
21 | |
8c1fd974 |
22 | #define ANIM_TIME 0.13F |
23 | #define FLASH_FRAME 0.13F |
4efb3868 |
24 | |
25 | #define X(state, i) ( (i) % (state)->w ) |
26 | #define Y(state, i) ( (i) / (state)->w ) |
27 | #define C(state, x, y) ( (y) * (state)->w + (x) ) |
28 | |
29 | enum { |
30 | COL_BACKGROUND, |
31 | COL_TEXT, |
32 | COL_HIGHLIGHT, |
33 | COL_LOWLIGHT, |
34 | NCOLOURS |
35 | }; |
36 | |
37 | struct game_params { |
38 | int w, h; |
39 | }; |
40 | |
41 | struct game_state { |
42 | int w, h, n; |
43 | int *tiles; |
44 | int completed; |
fd1a1a2b |
45 | int movecount; |
c8230524 |
46 | int last_movement_sense; |
4efb3868 |
47 | }; |
48 | |
be8d5aa1 |
49 | static game_params *default_params(void) |
4efb3868 |
50 | { |
51 | game_params *ret = snew(game_params); |
52 | |
53 | ret->w = ret->h = 4; |
54 | |
55 | return ret; |
56 | } |
57 | |
be8d5aa1 |
58 | static int game_fetch_preset(int i, char **name, game_params **params) |
4efb3868 |
59 | { |
60 | game_params *ret; |
61 | int w, h; |
62 | char buf[80]; |
63 | |
64 | switch (i) { |
65 | case 0: w = 3, h = 3; break; |
66 | case 1: w = 4, h = 3; break; |
67 | case 2: w = 4, h = 4; break; |
68 | case 3: w = 5, h = 4; break; |
69 | case 4: w = 5, h = 5; break; |
70 | default: return FALSE; |
71 | } |
72 | |
73 | sprintf(buf, "%dx%d", w, h); |
74 | *name = dupstr(buf); |
75 | *params = ret = snew(game_params); |
76 | ret->w = w; |
77 | ret->h = h; |
78 | return TRUE; |
79 | } |
80 | |
be8d5aa1 |
81 | static void free_params(game_params *params) |
4efb3868 |
82 | { |
83 | sfree(params); |
84 | } |
85 | |
be8d5aa1 |
86 | static game_params *dup_params(game_params *params) |
4efb3868 |
87 | { |
88 | game_params *ret = snew(game_params); |
89 | *ret = *params; /* structure copy */ |
90 | return ret; |
91 | } |
92 | |
be8d5aa1 |
93 | static game_params *decode_params(char const *string) |
b0e26073 |
94 | { |
95 | game_params *ret = default_params(); |
96 | |
97 | ret->w = ret->h = atoi(string); |
98 | while (*string && isdigit(*string)) string++; |
99 | if (*string == 'x') { |
100 | string++; |
101 | ret->h = atoi(string); |
102 | } |
103 | |
104 | return ret; |
105 | } |
106 | |
be8d5aa1 |
107 | static char *encode_params(game_params *params) |
b0e26073 |
108 | { |
109 | char data[256]; |
110 | |
111 | sprintf(data, "%dx%d", params->w, params->h); |
112 | |
113 | return dupstr(data); |
114 | } |
115 | |
be8d5aa1 |
116 | static config_item *game_configure(game_params *params) |
c8230524 |
117 | { |
118 | config_item *ret; |
119 | char buf[80]; |
120 | |
121 | ret = snewn(3, config_item); |
122 | |
123 | ret[0].name = "Width"; |
95709966 |
124 | ret[0].type = C_STRING; |
c8230524 |
125 | sprintf(buf, "%d", params->w); |
126 | ret[0].sval = dupstr(buf); |
127 | ret[0].ival = 0; |
128 | |
129 | ret[1].name = "Height"; |
95709966 |
130 | ret[1].type = C_STRING; |
c8230524 |
131 | sprintf(buf, "%d", params->h); |
132 | ret[1].sval = dupstr(buf); |
133 | ret[1].ival = 0; |
134 | |
135 | ret[2].name = NULL; |
95709966 |
136 | ret[2].type = C_END; |
c8230524 |
137 | ret[2].sval = NULL; |
138 | ret[2].ival = 0; |
139 | |
140 | return ret; |
141 | } |
142 | |
be8d5aa1 |
143 | static game_params *custom_params(config_item *cfg) |
c8230524 |
144 | { |
145 | game_params *ret = snew(game_params); |
146 | |
147 | ret->w = atoi(cfg[0].sval); |
148 | ret->h = atoi(cfg[1].sval); |
149 | |
150 | return ret; |
151 | } |
152 | |
be8d5aa1 |
153 | static char *validate_params(game_params *params) |
c8230524 |
154 | { |
155 | if (params->w < 2 && params->h < 2) |
156 | return "Width and height must both be at least two"; |
157 | |
158 | return NULL; |
159 | } |
160 | |
be8d5aa1 |
161 | static int perm_parity(int *perm, int n) |
4efb3868 |
162 | { |
163 | int i, j, ret; |
164 | |
165 | ret = 0; |
166 | |
167 | for (i = 0; i < n-1; i++) |
168 | for (j = i+1; j < n; j++) |
169 | if (perm[i] > perm[j]) |
170 | ret = !ret; |
171 | |
172 | return ret; |
173 | } |
174 | |
be8d5aa1 |
175 | static char *new_game_seed(game_params *params, random_state *rs) |
4efb3868 |
176 | { |
177 | int stop, n, i, x; |
178 | int x1, x2, p1, p2; |
179 | int *tiles, *used; |
180 | char *ret; |
181 | int retlen; |
182 | |
183 | n = params->w * params->h; |
184 | |
185 | tiles = snewn(n, int); |
186 | used = snewn(n, int); |
187 | |
188 | for (i = 0; i < n; i++) { |
189 | tiles[i] = -1; |
190 | used[i] = FALSE; |
191 | } |
192 | |
193 | /* |
194 | * If both dimensions are odd, there is a parity constraint. |
195 | */ |
196 | if (params->w & params->h & 1) |
197 | stop = 2; |
198 | else |
199 | stop = 0; |
200 | |
201 | /* |
202 | * Place everything except (possibly) the last two tiles. |
203 | */ |
204 | for (x = 0, i = n; i > stop; i--) { |
48d70ca9 |
205 | int k = i > 1 ? random_upto(rs, i) : 0; |
4efb3868 |
206 | int j; |
207 | |
208 | for (j = 0; j < n; j++) |
209 | if (!used[j] && (k-- == 0)) |
210 | break; |
211 | |
212 | assert(j < n && !used[j]); |
213 | used[j] = TRUE; |
214 | |
215 | while (tiles[x] >= 0) |
216 | x++; |
217 | assert(x < n); |
218 | tiles[x] = j; |
219 | } |
220 | |
221 | if (stop) { |
222 | /* |
223 | * Find the last two locations, and the last two pieces. |
224 | */ |
225 | while (tiles[x] >= 0) |
226 | x++; |
227 | assert(x < n); |
228 | x1 = x; |
229 | x++; |
230 | while (tiles[x] >= 0) |
231 | x++; |
232 | assert(x < n); |
233 | x2 = x; |
234 | |
235 | for (i = 0; i < n; i++) |
236 | if (!used[i]) |
237 | break; |
238 | p1 = i; |
239 | for (i = p1+1; i < n; i++) |
240 | if (!used[i]) |
241 | break; |
242 | p2 = i; |
243 | |
244 | /* |
245 | * Try the last two tiles one way round. If that fails, swap |
246 | * them. |
247 | */ |
248 | tiles[x1] = p1; |
249 | tiles[x2] = p2; |
250 | if (perm_parity(tiles, n) != 0) { |
251 | tiles[x1] = p2; |
252 | tiles[x2] = p1; |
253 | assert(perm_parity(tiles, n) == 0); |
254 | } |
255 | } |
256 | |
257 | /* |
258 | * Now construct the game seed, by describing the tile array as |
259 | * a simple sequence of comma-separated integers. |
260 | */ |
261 | ret = NULL; |
262 | retlen = 0; |
263 | for (i = 0; i < n; i++) { |
264 | char buf[80]; |
265 | int k; |
266 | |
267 | k = sprintf(buf, "%d,", tiles[i]+1); |
268 | |
269 | ret = sresize(ret, retlen + k + 1, char); |
270 | strcpy(ret + retlen, buf); |
271 | retlen += k; |
272 | } |
273 | ret[retlen-1] = '\0'; /* delete last comma */ |
274 | |
275 | sfree(tiles); |
276 | sfree(used); |
277 | |
278 | return ret; |
279 | } |
280 | |
5928817c |
281 | |
be8d5aa1 |
282 | static char *validate_seed(game_params *params, char *seed) |
5928817c |
283 | { |
284 | char *p, *err; |
285 | int i, area; |
286 | int *used; |
287 | |
288 | area = params->w * params->h; |
289 | p = seed; |
290 | err = NULL; |
291 | |
292 | used = snewn(area, int); |
293 | for (i = 0; i < area; i++) |
294 | used[i] = FALSE; |
295 | |
296 | for (i = 0; i < area; i++) { |
297 | char *q = p; |
298 | int n; |
299 | |
300 | if (*p < '0' || *p > '9') { |
301 | err = "Not enough numbers in string"; |
302 | goto leave; |
303 | } |
304 | while (*p >= '0' && *p <= '9') |
305 | p++; |
306 | if (i < area-1 && *p != ',') { |
307 | err = "Expected comma after number"; |
308 | goto leave; |
309 | } |
310 | else if (i == area-1 && *p) { |
311 | err = "Excess junk at end of string"; |
312 | goto leave; |
313 | } |
314 | n = atoi(q); |
315 | if (n < 1 || n > area) { |
316 | err = "Number out of range"; |
317 | goto leave; |
318 | } |
319 | if (used[n-1]) { |
320 | err = "Number used twice"; |
321 | goto leave; |
322 | } |
323 | used[n-1] = TRUE; |
324 | |
325 | if (*p) p++; /* eat comma */ |
326 | } |
327 | |
328 | leave: |
329 | sfree(used); |
330 | return err; |
331 | } |
332 | |
be8d5aa1 |
333 | static game_state *new_game(game_params *params, char *seed) |
4efb3868 |
334 | { |
335 | game_state *state = snew(game_state); |
336 | int i; |
337 | char *p; |
338 | |
339 | state->w = params->w; |
340 | state->h = params->h; |
341 | state->n = params->w * params->h; |
342 | state->tiles = snewn(state->n, int); |
343 | |
344 | p = seed; |
345 | i = 0; |
346 | for (i = 0; i < state->n; i++) { |
347 | assert(*p); |
348 | state->tiles[i] = atoi(p); |
349 | while (*p && *p != ',') |
350 | p++; |
351 | if (*p) p++; /* eat comma */ |
352 | } |
353 | assert(!*p); |
354 | |
fd1a1a2b |
355 | state->completed = state->movecount = 0; |
c8230524 |
356 | state->last_movement_sense = 0; |
4efb3868 |
357 | |
358 | return state; |
359 | } |
360 | |
be8d5aa1 |
361 | static game_state *dup_game(game_state *state) |
4efb3868 |
362 | { |
363 | game_state *ret = snew(game_state); |
364 | |
365 | ret->w = state->w; |
366 | ret->h = state->h; |
367 | ret->n = state->n; |
368 | ret->tiles = snewn(state->w * state->h, int); |
369 | memcpy(ret->tiles, state->tiles, state->w * state->h * sizeof(int)); |
370 | ret->completed = state->completed; |
fd1a1a2b |
371 | ret->movecount = state->movecount; |
c8230524 |
372 | ret->last_movement_sense = state->last_movement_sense; |
4efb3868 |
373 | |
374 | return ret; |
375 | } |
376 | |
be8d5aa1 |
377 | static void free_game(game_state *state) |
4efb3868 |
378 | { |
379 | sfree(state); |
380 | } |
381 | |
9b4b03d3 |
382 | static char *game_text_format(game_state *state) |
383 | { |
384 | return NULL; |
385 | } |
386 | |
be8d5aa1 |
387 | static game_ui *new_ui(game_state *state) |
74a4e547 |
388 | { |
389 | return NULL; |
390 | } |
391 | |
be8d5aa1 |
392 | static void free_ui(game_ui *ui) |
74a4e547 |
393 | { |
394 | } |
395 | |
be8d5aa1 |
396 | static game_state *make_move(game_state *from, game_ui *ui, |
397 | int x, int y, int button) |
4efb3868 |
398 | { |
399 | int cx, cy; |
400 | int dx, dy, tx, ty, n; |
401 | game_state *ret; |
402 | |
e91825f8 |
403 | if (button != LEFT_BUTTON && button != RIGHT_BUTTON) |
4efb3868 |
404 | return NULL; |
405 | |
406 | cx = FROMCOORD(x); |
407 | cy = FROMCOORD(y); |
408 | if (cx == -1 && cy >= 0 && cy < from->h) |
409 | n = from->w, dx = +1, dy = 0; |
410 | else if (cx == from->w && cy >= 0 && cy < from->h) |
411 | n = from->w, dx = -1, dy = 0; |
412 | else if (cy == -1 && cx >= 0 && cx < from->w) |
413 | n = from->h, dy = +1, dx = 0; |
414 | else if (cy == from->h && cx >= 0 && cx < from->w) |
415 | n = from->h, dy = -1, dx = 0; |
416 | else |
417 | return NULL; /* invalid click location */ |
418 | |
e91825f8 |
419 | /* reverse direction if right hand button is pressed */ |
420 | if (button == RIGHT_BUTTON) |
421 | { |
422 | dx = -dx; if (dx) cx = from->w - 1 - cx; |
423 | dy = -dy; if (dy) cy = from->h - 1 - cy; |
424 | } |
425 | |
4efb3868 |
426 | ret = dup_game(from); |
427 | |
428 | do { |
429 | cx += dx; |
430 | cy += dy; |
431 | tx = (cx + dx + from->w) % from->w; |
432 | ty = (cy + dy + from->h) % from->h; |
433 | ret->tiles[C(ret, cx, cy)] = from->tiles[C(from, tx, ty)]; |
434 | } while (--n > 0); |
435 | |
fd1a1a2b |
436 | ret->movecount++; |
437 | |
c8230524 |
438 | ret->last_movement_sense = -(dx+dy); |
439 | |
4efb3868 |
440 | /* |
441 | * See if the game has been completed. |
442 | */ |
443 | if (!ret->completed) { |
fd1a1a2b |
444 | ret->completed = ret->movecount; |
4efb3868 |
445 | for (n = 0; n < ret->n; n++) |
446 | if (ret->tiles[n] != n+1) |
447 | ret->completed = FALSE; |
448 | } |
449 | |
450 | return ret; |
451 | } |
452 | |
453 | /* ---------------------------------------------------------------------- |
454 | * Drawing routines. |
455 | */ |
456 | |
457 | struct game_drawstate { |
458 | int started; |
459 | int w, h, bgcolour; |
460 | int *tiles; |
461 | }; |
462 | |
be8d5aa1 |
463 | static void game_size(game_params *params, int *x, int *y) |
4efb3868 |
464 | { |
465 | *x = TILE_SIZE * params->w + 2 * BORDER; |
466 | *y = TILE_SIZE * params->h + 2 * BORDER; |
467 | } |
468 | |
be8d5aa1 |
469 | static float *game_colours(frontend *fe, game_state *state, int *ncolours) |
4efb3868 |
470 | { |
471 | float *ret = snewn(3 * NCOLOURS, float); |
472 | int i; |
473 | float max; |
474 | |
475 | frontend_default_colour(fe, &ret[COL_BACKGROUND * 3]); |
476 | |
477 | /* |
478 | * Drop the background colour so that the highlight is |
479 | * noticeably brighter than it while still being under 1. |
480 | */ |
481 | max = ret[COL_BACKGROUND*3]; |
482 | for (i = 1; i < 3; i++) |
483 | if (ret[COL_BACKGROUND*3+i] > max) |
484 | max = ret[COL_BACKGROUND*3+i]; |
485 | if (max * 1.2F > 1.0F) { |
486 | for (i = 0; i < 3; i++) |
487 | ret[COL_BACKGROUND*3+i] /= (max * 1.2F); |
488 | } |
489 | |
490 | for (i = 0; i < 3; i++) { |
491 | ret[COL_HIGHLIGHT * 3 + i] = ret[COL_BACKGROUND * 3 + i] * 1.2F; |
492 | ret[COL_LOWLIGHT * 3 + i] = ret[COL_BACKGROUND * 3 + i] * 0.8F; |
493 | ret[COL_TEXT * 3 + i] = 0.0; |
494 | } |
495 | |
496 | *ncolours = NCOLOURS; |
497 | return ret; |
498 | } |
499 | |
be8d5aa1 |
500 | static game_drawstate *game_new_drawstate(game_state *state) |
4efb3868 |
501 | { |
502 | struct game_drawstate *ds = snew(struct game_drawstate); |
503 | int i; |
504 | |
505 | ds->started = FALSE; |
506 | ds->w = state->w; |
507 | ds->h = state->h; |
508 | ds->bgcolour = COL_BACKGROUND; |
509 | ds->tiles = snewn(ds->w*ds->h, int); |
510 | for (i = 0; i < ds->w*ds->h; i++) |
511 | ds->tiles[i] = -1; |
512 | |
513 | return ds; |
514 | } |
515 | |
be8d5aa1 |
516 | static void game_free_drawstate(game_drawstate *ds) |
4efb3868 |
517 | { |
518 | sfree(ds->tiles); |
519 | sfree(ds); |
520 | } |
521 | |
522 | static void draw_tile(frontend *fe, game_state *state, int x, int y, |
523 | int tile, int flash_colour) |
524 | { |
525 | if (tile == 0) { |
526 | draw_rect(fe, x, y, TILE_SIZE, TILE_SIZE, |
527 | flash_colour); |
528 | } else { |
529 | int coords[6]; |
530 | char str[40]; |
531 | |
532 | coords[0] = x + TILE_SIZE - 1; |
533 | coords[1] = y + TILE_SIZE - 1; |
534 | coords[2] = x + TILE_SIZE - 1; |
535 | coords[3] = y; |
536 | coords[4] = x; |
537 | coords[5] = y + TILE_SIZE - 1; |
538 | draw_polygon(fe, coords, 3, TRUE, COL_LOWLIGHT); |
539 | draw_polygon(fe, coords, 3, FALSE, COL_LOWLIGHT); |
540 | |
541 | coords[0] = x; |
542 | coords[1] = y; |
543 | draw_polygon(fe, coords, 3, TRUE, COL_HIGHLIGHT); |
544 | draw_polygon(fe, coords, 3, FALSE, COL_HIGHLIGHT); |
545 | |
546 | draw_rect(fe, x + HIGHLIGHT_WIDTH, y + HIGHLIGHT_WIDTH, |
547 | TILE_SIZE - 2*HIGHLIGHT_WIDTH, TILE_SIZE - 2*HIGHLIGHT_WIDTH, |
548 | flash_colour); |
549 | |
550 | sprintf(str, "%d", tile); |
551 | draw_text(fe, x + TILE_SIZE/2, y + TILE_SIZE/2, |
552 | FONT_VARIABLE, TILE_SIZE/3, ALIGN_VCENTRE | ALIGN_HCENTRE, |
553 | COL_TEXT, str); |
554 | } |
555 | draw_update(fe, x, y, TILE_SIZE, TILE_SIZE); |
556 | } |
557 | |
558 | static void draw_arrow(frontend *fe, int x, int y, int xdx, int xdy) |
559 | { |
560 | int coords[14]; |
561 | int ydy = -xdx, ydx = xdy; |
562 | |
563 | #define POINT(n, xx, yy) ( \ |
564 | coords[2*(n)+0] = x + (xx)*xdx + (yy)*ydx, \ |
565 | coords[2*(n)+1] = y + (xx)*xdy + (yy)*ydy) |
566 | |
567 | POINT(0, TILE_SIZE / 2, 3 * TILE_SIZE / 4); /* top of arrow */ |
568 | POINT(1, 3 * TILE_SIZE / 4, TILE_SIZE / 2); /* right corner */ |
569 | POINT(2, 5 * TILE_SIZE / 8, TILE_SIZE / 2); /* right concave */ |
570 | POINT(3, 5 * TILE_SIZE / 8, TILE_SIZE / 4); /* bottom right */ |
571 | POINT(4, 3 * TILE_SIZE / 8, TILE_SIZE / 4); /* bottom left */ |
572 | POINT(5, 3 * TILE_SIZE / 8, TILE_SIZE / 2); /* left concave */ |
573 | POINT(6, TILE_SIZE / 4, TILE_SIZE / 2); /* left corner */ |
574 | |
575 | draw_polygon(fe, coords, 7, TRUE, COL_LOWLIGHT); |
576 | draw_polygon(fe, coords, 7, FALSE, COL_TEXT); |
577 | } |
578 | |
be8d5aa1 |
579 | static void game_redraw(frontend *fe, game_drawstate *ds, game_state *oldstate, |
c822de4a |
580 | game_state *state, int dir, game_ui *ui, |
74a4e547 |
581 | float animtime, float flashtime) |
4efb3868 |
582 | { |
b443c381 |
583 | int i, bgcolour; |
4efb3868 |
584 | |
585 | if (flashtime > 0) { |
586 | int frame = (int)(flashtime / FLASH_FRAME); |
587 | bgcolour = (frame % 2 ? COL_LOWLIGHT : COL_HIGHLIGHT); |
588 | } else |
589 | bgcolour = COL_BACKGROUND; |
590 | |
591 | if (!ds->started) { |
592 | int coords[6]; |
593 | |
594 | draw_rect(fe, 0, 0, |
595 | TILE_SIZE * state->w + 2 * BORDER, |
596 | TILE_SIZE * state->h + 2 * BORDER, COL_BACKGROUND); |
597 | draw_update(fe, 0, 0, |
598 | TILE_SIZE * state->w + 2 * BORDER, |
599 | TILE_SIZE * state->h + 2 * BORDER); |
600 | |
601 | /* |
602 | * Recessed area containing the whole puzzle. |
603 | */ |
604 | coords[0] = COORD(state->w) + HIGHLIGHT_WIDTH - 1; |
605 | coords[1] = COORD(state->h) + HIGHLIGHT_WIDTH - 1; |
606 | coords[2] = COORD(state->w) + HIGHLIGHT_WIDTH - 1; |
607 | coords[3] = COORD(0) - HIGHLIGHT_WIDTH; |
608 | coords[4] = COORD(0) - HIGHLIGHT_WIDTH; |
609 | coords[5] = COORD(state->h) + HIGHLIGHT_WIDTH - 1; |
610 | draw_polygon(fe, coords, 3, TRUE, COL_HIGHLIGHT); |
611 | draw_polygon(fe, coords, 3, FALSE, COL_HIGHLIGHT); |
612 | |
613 | coords[1] = COORD(0) - HIGHLIGHT_WIDTH; |
614 | coords[0] = COORD(0) - HIGHLIGHT_WIDTH; |
615 | draw_polygon(fe, coords, 3, TRUE, COL_LOWLIGHT); |
616 | draw_polygon(fe, coords, 3, FALSE, COL_LOWLIGHT); |
617 | |
618 | /* |
619 | * Arrows for making moves. |
620 | */ |
621 | for (i = 0; i < state->w; i++) { |
622 | draw_arrow(fe, COORD(i), COORD(0), +1, 0); |
623 | draw_arrow(fe, COORD(i+1), COORD(state->h), -1, 0); |
624 | } |
625 | for (i = 0; i < state->h; i++) { |
626 | draw_arrow(fe, COORD(state->w), COORD(i), 0, +1); |
627 | draw_arrow(fe, COORD(0), COORD(i+1), 0, -1); |
628 | } |
629 | |
630 | ds->started = TRUE; |
631 | } |
632 | |
633 | /* |
b443c381 |
634 | * Now draw each tile. |
4efb3868 |
635 | */ |
636 | |
637 | clip(fe, COORD(0), COORD(0), TILE_SIZE*state->w, TILE_SIZE*state->h); |
638 | |
b443c381 |
639 | for (i = 0; i < state->n; i++) { |
640 | int t, t0; |
641 | /* |
642 | * Figure out what should be displayed at this |
643 | * location. It's either a simple tile, or it's a |
644 | * transition between two tiles (in which case we say |
645 | * -1 because it must always be drawn). |
646 | */ |
647 | |
648 | if (oldstate && oldstate->tiles[i] != state->tiles[i]) |
649 | t = -1; |
650 | else |
651 | t = state->tiles[i]; |
652 | |
653 | t0 = t; |
654 | |
655 | if (ds->bgcolour != bgcolour || /* always redraw when flashing */ |
656 | ds->tiles[i] != t || ds->tiles[i] == -1 || t == -1) { |
657 | int x, y, x2, y2; |
658 | |
659 | /* |
660 | * Figure out what to _actually_ draw, and where to |
661 | * draw it. |
662 | */ |
663 | if (t == -1) { |
664 | int x0, y0, x1, y1, dx, dy; |
665 | int j; |
666 | float c; |
667 | int sense; |
668 | |
5b5c6b12 |
669 | if (dir < 0) { |
670 | assert(oldstate); |
b443c381 |
671 | sense = -oldstate->last_movement_sense; |
5b5c6b12 |
672 | } else { |
b443c381 |
673 | sense = state->last_movement_sense; |
5b5c6b12 |
674 | } |
b443c381 |
675 | |
676 | t = state->tiles[i]; |
677 | |
678 | /* |
679 | * FIXME: must be prepared to draw a double |
680 | * tile in some situations. |
681 | */ |
682 | |
683 | /* |
684 | * Find the coordinates of this tile in the old and |
685 | * new states. |
686 | */ |
687 | x1 = COORD(X(state, i)); |
688 | y1 = COORD(Y(state, i)); |
689 | for (j = 0; j < oldstate->n; j++) |
690 | if (oldstate->tiles[j] == state->tiles[i]) |
691 | break; |
692 | assert(j < oldstate->n); |
693 | x0 = COORD(X(state, j)); |
694 | y0 = COORD(Y(state, j)); |
695 | |
696 | dx = (x1 - x0); |
697 | if (dx != 0 && |
698 | dx != TILE_SIZE * sense) { |
699 | dx = (dx < 0 ? dx + TILE_SIZE * state->w : |
700 | dx - TILE_SIZE * state->w); |
701 | assert(abs(dx) == TILE_SIZE); |
702 | } |
703 | dy = (y1 - y0); |
704 | if (dy != 0 && |
705 | dy != TILE_SIZE * sense) { |
706 | dy = (dy < 0 ? dy + TILE_SIZE * state->h : |
707 | dy - TILE_SIZE * state->h); |
708 | assert(abs(dy) == TILE_SIZE); |
709 | } |
710 | |
711 | c = (animtime / ANIM_TIME); |
712 | if (c < 0.0F) c = 0.0F; |
713 | if (c > 1.0F) c = 1.0F; |
714 | |
715 | x = x0 + (int)(c * dx); |
716 | y = y0 + (int)(c * dy); |
717 | x2 = x1 - dx + (int)(c * dx); |
718 | y2 = y1 - dy + (int)(c * dy); |
719 | } else { |
720 | x = COORD(X(state, i)); |
721 | y = COORD(Y(state, i)); |
722 | x2 = y2 = -1; |
723 | } |
724 | |
725 | draw_tile(fe, state, x, y, t, bgcolour); |
726 | if (x2 != -1 || y2 != -1) |
727 | draw_tile(fe, state, x2, y2, t, bgcolour); |
728 | } |
729 | ds->tiles[i] = t0; |
4efb3868 |
730 | } |
731 | |
732 | unclip(fe); |
733 | |
734 | ds->bgcolour = bgcolour; |
fd1a1a2b |
735 | |
736 | /* |
737 | * Update the status bar. |
738 | */ |
739 | { |
740 | char statusbuf[256]; |
741 | |
d108c342 |
742 | /* |
743 | * Don't show the new status until we're also showing the |
744 | * new _state_ - after the game animation is complete. |
745 | */ |
746 | if (oldstate) |
747 | state = oldstate; |
748 | |
fd1a1a2b |
749 | sprintf(statusbuf, "%sMoves: %d", |
750 | (state->completed ? "COMPLETED! " : ""), |
751 | (state->completed ? state->completed : state->movecount)); |
752 | |
753 | status_bar(fe, statusbuf); |
754 | } |
4efb3868 |
755 | } |
756 | |
be8d5aa1 |
757 | static float game_anim_length(game_state *oldstate, |
758 | game_state *newstate, int dir) |
4efb3868 |
759 | { |
760 | return ANIM_TIME; |
761 | } |
762 | |
be8d5aa1 |
763 | static float game_flash_length(game_state *oldstate, |
764 | game_state *newstate, int dir) |
4efb3868 |
765 | { |
766 | if (!oldstate->completed && newstate->completed) |
767 | return 2 * FLASH_FRAME; |
768 | else |
769 | return 0.0F; |
770 | } |
fd1a1a2b |
771 | |
be8d5aa1 |
772 | static int game_wants_statusbar(void) |
fd1a1a2b |
773 | { |
774 | return TRUE; |
775 | } |
be8d5aa1 |
776 | |
19ef4855 |
777 | #ifdef COMBINED |
778 | #define thegame sixteen |
779 | #endif |
780 | |
be8d5aa1 |
781 | const struct game thegame = { |
1d228b10 |
782 | "Sixteen", "games.sixteen", |
be8d5aa1 |
783 | default_params, |
784 | game_fetch_preset, |
785 | decode_params, |
786 | encode_params, |
787 | free_params, |
788 | dup_params, |
1d228b10 |
789 | TRUE, game_configure, custom_params, |
be8d5aa1 |
790 | validate_params, |
791 | new_game_seed, |
792 | validate_seed, |
793 | new_game, |
794 | dup_game, |
795 | free_game, |
9b4b03d3 |
796 | FALSE, game_text_format, |
be8d5aa1 |
797 | new_ui, |
798 | free_ui, |
799 | make_move, |
800 | game_size, |
801 | game_colours, |
802 | game_new_drawstate, |
803 | game_free_drawstate, |
804 | game_redraw, |
805 | game_anim_length, |
806 | game_flash_length, |
807 | game_wants_statusbar, |
808 | }; |