| 1 | /* |
| 2 | * twiddle.c: Puzzle involving rearranging a grid of squares by |
| 3 | * rotating subsquares. Adapted and generalised from a |
| 4 | * door-unlocking puzzle in Metroid Prime 2 (the one in the Main |
| 5 | * Gyro Chamber). |
| 6 | */ |
| 7 | |
| 8 | /* |
| 9 | * Possibly TODO: |
| 10 | * |
| 11 | * - it's horribly tempting to give the pieces significant |
| 12 | * _orientations_, perhaps by drawing some sort of oriented |
| 13 | * polygonal figure beneath the number. (An arrow pointing |
| 14 | * upwards springs readily to mind.) |
| 15 | */ |
| 16 | |
| 17 | #include <stdio.h> |
| 18 | #include <stdlib.h> |
| 19 | #include <string.h> |
| 20 | #include <assert.h> |
| 21 | #include <ctype.h> |
| 22 | #include <math.h> |
| 23 | |
| 24 | #include "puzzles.h" |
| 25 | |
| 26 | #define TILE_SIZE 48 |
| 27 | #define BORDER (TILE_SIZE / 2) |
| 28 | #define HIGHLIGHT_WIDTH (TILE_SIZE / 20) |
| 29 | #define COORD(x) ( (x) * TILE_SIZE + BORDER ) |
| 30 | #define FROMCOORD(x) ( ((x) - BORDER + TILE_SIZE) / TILE_SIZE - 1 ) |
| 31 | |
| 32 | #define PI 3.141592653589793238462643383279502884197169399 |
| 33 | |
| 34 | #define ANIM_PER_RADIUS_UNIT 0.13F |
| 35 | #define FLASH_FRAME 0.13F |
| 36 | |
| 37 | enum { |
| 38 | COL_BACKGROUND, |
| 39 | COL_TEXT, |
| 40 | COL_HIGHLIGHT, |
| 41 | COL_HIGHLIGHT_GENTLE, |
| 42 | COL_LOWLIGHT, |
| 43 | COL_LOWLIGHT_GENTLE, |
| 44 | NCOLOURS |
| 45 | }; |
| 46 | |
| 47 | struct game_params { |
| 48 | int w, h, n; |
| 49 | int rowsonly; |
| 50 | }; |
| 51 | |
| 52 | struct game_state { |
| 53 | int w, h, n; |
| 54 | int *grid; |
| 55 | int completed; |
| 56 | int movecount; |
| 57 | int lastx, lasty, lastr; /* coordinates of last rotation */ |
| 58 | }; |
| 59 | |
| 60 | static game_params *default_params(void) |
| 61 | { |
| 62 | game_params *ret = snew(game_params); |
| 63 | |
| 64 | ret->w = ret->h = 3; |
| 65 | ret->n = 2; |
| 66 | ret->rowsonly = FALSE; |
| 67 | |
| 68 | return ret; |
| 69 | } |
| 70 | |
| 71 | |
| 72 | static void free_params(game_params *params) |
| 73 | { |
| 74 | sfree(params); |
| 75 | } |
| 76 | |
| 77 | static game_params *dup_params(game_params *params) |
| 78 | { |
| 79 | game_params *ret = snew(game_params); |
| 80 | *ret = *params; /* structure copy */ |
| 81 | return ret; |
| 82 | } |
| 83 | |
| 84 | static int game_fetch_preset(int i, char **name, game_params **params) |
| 85 | { |
| 86 | static struct { |
| 87 | char *title; |
| 88 | game_params params; |
| 89 | } presets[] = { |
| 90 | { "3x3 rows only", { 3, 3, 2, TRUE } }, |
| 91 | { "3x3 normal", { 3, 3, 2, FALSE } }, |
| 92 | { "4x4 normal", { 4, 4, 2, FALSE } }, |
| 93 | { "4x4 radius 3", { 4, 4, 3, FALSE } }, |
| 94 | { "5x5 radius 3", { 5, 5, 3, FALSE } }, |
| 95 | { "6x6 radius 4", { 6, 6, 4, FALSE } }, |
| 96 | }; |
| 97 | |
| 98 | if (i < 0 || i >= lenof(presets)) |
| 99 | return FALSE; |
| 100 | |
| 101 | *name = dupstr(presets[i].title); |
| 102 | *params = dup_params(&presets[i].params); |
| 103 | |
| 104 | return TRUE; |
| 105 | } |
| 106 | |
| 107 | static game_params *decode_params(char const *string) |
| 108 | { |
| 109 | game_params *ret = snew(game_params); |
| 110 | |
| 111 | ret->w = ret->h = atoi(string); |
| 112 | ret->n = 2; |
| 113 | ret->rowsonly = FALSE; |
| 114 | while (*string && isdigit(*string)) string++; |
| 115 | if (*string == 'x') { |
| 116 | string++; |
| 117 | ret->h = atoi(string); |
| 118 | while (*string && isdigit(*string)) string++; |
| 119 | } |
| 120 | if (*string == 'n') { |
| 121 | string++; |
| 122 | ret->n = atoi(string); |
| 123 | while (*string && isdigit(*string)) string++; |
| 124 | } |
| 125 | if (*string == 'r') { |
| 126 | string++; |
| 127 | ret->rowsonly = TRUE; |
| 128 | } |
| 129 | |
| 130 | return ret; |
| 131 | } |
| 132 | |
| 133 | static char *encode_params(game_params *params) |
| 134 | { |
| 135 | char buf[256]; |
| 136 | sprintf(buf, "%dx%dn%d%s", params->w, params->h, params->n, |
| 137 | params->rowsonly ? "r" : ""); |
| 138 | return dupstr(buf); |
| 139 | } |
| 140 | |
| 141 | static config_item *game_configure(game_params *params) |
| 142 | { |
| 143 | config_item *ret; |
| 144 | char buf[80]; |
| 145 | |
| 146 | ret = snewn(4, config_item); |
| 147 | |
| 148 | ret[0].name = "Width"; |
| 149 | ret[0].type = C_STRING; |
| 150 | sprintf(buf, "%d", params->w); |
| 151 | ret[0].sval = dupstr(buf); |
| 152 | ret[0].ival = 0; |
| 153 | |
| 154 | ret[1].name = "Height"; |
| 155 | ret[1].type = C_STRING; |
| 156 | sprintf(buf, "%d", params->h); |
| 157 | ret[1].sval = dupstr(buf); |
| 158 | ret[1].ival = 0; |
| 159 | |
| 160 | ret[2].name = "Rotation radius"; |
| 161 | ret[2].type = C_STRING; |
| 162 | sprintf(buf, "%d", params->n); |
| 163 | ret[2].sval = dupstr(buf); |
| 164 | ret[2].ival = 0; |
| 165 | |
| 166 | ret[3].name = "One number per row"; |
| 167 | ret[3].type = C_BOOLEAN; |
| 168 | ret[3].sval = NULL; |
| 169 | ret[3].ival = params->rowsonly; |
| 170 | |
| 171 | ret[4].name = NULL; |
| 172 | ret[4].type = C_END; |
| 173 | ret[4].sval = NULL; |
| 174 | ret[4].ival = 0; |
| 175 | |
| 176 | return ret; |
| 177 | } |
| 178 | |
| 179 | static game_params *custom_params(config_item *cfg) |
| 180 | { |
| 181 | game_params *ret = snew(game_params); |
| 182 | |
| 183 | ret->w = atoi(cfg[0].sval); |
| 184 | ret->h = atoi(cfg[1].sval); |
| 185 | ret->n = atoi(cfg[2].sval); |
| 186 | ret->rowsonly = cfg[3].ival; |
| 187 | |
| 188 | return ret; |
| 189 | } |
| 190 | |
| 191 | static char *validate_params(game_params *params) |
| 192 | { |
| 193 | if (params->n < 2) |
| 194 | return "Rotation radius must be at least two"; |
| 195 | if (params->w < params->n) |
| 196 | return "Width must be at least the rotation radius"; |
| 197 | if (params->h < params->n) |
| 198 | return "Height must be at least the rotation radius"; |
| 199 | return NULL; |
| 200 | } |
| 201 | |
| 202 | /* |
| 203 | * This function actually performs a rotation on a grid. The `x' |
| 204 | * and `y' coordinates passed in are the coordinates of the _top |
| 205 | * left corner_ of the rotated region. (Using the centre would have |
| 206 | * involved half-integers and been annoyingly fiddly. Clicking in |
| 207 | * the centre is good for a user interface, but too inconvenient to |
| 208 | * use internally.) |
| 209 | */ |
| 210 | static void do_rotate(int *grid, int w, int h, int n, int x, int y, int dir) |
| 211 | { |
| 212 | int i, j; |
| 213 | |
| 214 | assert(x >= 0 && x+n <= w); |
| 215 | assert(y >= 0 && y+n <= h); |
| 216 | dir &= 3; |
| 217 | if (dir == 0) |
| 218 | return; /* nothing to do */ |
| 219 | |
| 220 | grid += y*w+x; /* translate region to top corner */ |
| 221 | |
| 222 | /* |
| 223 | * If we were leaving the result of the rotation in a separate |
| 224 | * grid, the simple thing to do would be to loop over each |
| 225 | * square within the rotated region and assign it from its |
| 226 | * source square. However, to do it in place without taking |
| 227 | * O(n^2) memory, we need to be marginally more clever. What |
| 228 | * I'm going to do is loop over about one _quarter_ of the |
| 229 | * rotated region and permute each element within that quarter |
| 230 | * with its rotational coset. |
| 231 | * |
| 232 | * The size of the region I need to loop over is (n+1)/2 by |
| 233 | * n/2, which is an obvious exact quarter for even n and is a |
| 234 | * rectangle for odd n. (For odd n, this technique leaves out |
| 235 | * one element of the square, which is of course the central |
| 236 | * one that never moves anyway.) |
| 237 | */ |
| 238 | for (i = 0; i < (n+1)/2; i++) { |
| 239 | for (j = 0; j < n/2; j++) { |
| 240 | int k; |
| 241 | int g[4]; |
| 242 | int p[4] = { |
| 243 | j*w+i, |
| 244 | i*w+(n-j-1), |
| 245 | (n-j-1)*w+(n-i-1), |
| 246 | (n-i-1)*w+j |
| 247 | }; |
| 248 | |
| 249 | for (k = 0; k < 4; k++) |
| 250 | g[k] = grid[p[k]]; |
| 251 | |
| 252 | for (k = 0; k < 4; k++) |
| 253 | grid[p[k]] = g[(k+dir) & 3]; |
| 254 | } |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | static int grid_complete(int *grid, int wh) |
| 259 | { |
| 260 | int ok = TRUE; |
| 261 | int i; |
| 262 | for (i = 1; i < wh; i++) |
| 263 | if (grid[i] < grid[i-1]) |
| 264 | ok = FALSE; |
| 265 | return ok; |
| 266 | } |
| 267 | |
| 268 | static char *new_game_seed(game_params *params, random_state *rs) |
| 269 | { |
| 270 | int *grid; |
| 271 | int w = params->w, h = params->h, n = params->n, wh = w*h; |
| 272 | int i; |
| 273 | char *ret; |
| 274 | int retlen; |
| 275 | int total_moves; |
| 276 | |
| 277 | /* |
| 278 | * Set up a solved grid. |
| 279 | */ |
| 280 | grid = snewn(wh, int); |
| 281 | for (i = 0; i < wh; i++) |
| 282 | grid[i] = (params->rowsonly ? i/w : i) + 1; |
| 283 | |
| 284 | /* |
| 285 | * Shuffle it. This game is complex enough that I don't feel up |
| 286 | * to analysing its full symmetry properties (particularly at |
| 287 | * n=4 and above!), so I'm going to do it the pedestrian way |
| 288 | * and simply shuffle the grid by making a long sequence of |
| 289 | * randomly chosen moves. |
| 290 | */ |
| 291 | total_moves = w*h*n*n*2; |
| 292 | for (i = 0; i < total_moves; i++) { |
| 293 | int x, y; |
| 294 | |
| 295 | x = random_upto(rs, w - n + 1); |
| 296 | y = random_upto(rs, h - n + 1); |
| 297 | do_rotate(grid, w, h, n, x, y, 1 + random_upto(rs, 3)); |
| 298 | |
| 299 | /* |
| 300 | * Optionally one more move in case the entire grid has |
| 301 | * happened to come out solved. |
| 302 | */ |
| 303 | if (i == total_moves - 1 && grid_complete(grid, wh)) |
| 304 | i--; |
| 305 | } |
| 306 | |
| 307 | /* |
| 308 | * Now construct the game seed, by describing the grid as a |
| 309 | * simple sequence of comma-separated integers. |
| 310 | */ |
| 311 | ret = NULL; |
| 312 | retlen = 0; |
| 313 | for (i = 0; i < wh; i++) { |
| 314 | char buf[80]; |
| 315 | int k; |
| 316 | |
| 317 | k = sprintf(buf, "%d,", grid[i]); |
| 318 | |
| 319 | ret = sresize(ret, retlen + k + 1, char); |
| 320 | strcpy(ret + retlen, buf); |
| 321 | retlen += k; |
| 322 | } |
| 323 | ret[retlen-1] = '\0'; /* delete last comma */ |
| 324 | |
| 325 | sfree(grid); |
| 326 | return ret; |
| 327 | } |
| 328 | |
| 329 | static char *validate_seed(game_params *params, char *seed) |
| 330 | { |
| 331 | char *p, *err; |
| 332 | int w = params->w, h = params->h, wh = w*h; |
| 333 | int i; |
| 334 | |
| 335 | p = seed; |
| 336 | err = NULL; |
| 337 | |
| 338 | for (i = 0; i < wh; i++) { |
| 339 | if (*p < '0' || *p > '9') { |
| 340 | return "Not enough numbers in string"; |
| 341 | } |
| 342 | while (*p >= '0' && *p <= '9') |
| 343 | p++; |
| 344 | if (i < wh-1 && *p != ',') { |
| 345 | return "Expected comma after number"; |
| 346 | } |
| 347 | else if (i == wh-1 && *p) { |
| 348 | return "Excess junk at end of string"; |
| 349 | } |
| 350 | |
| 351 | if (*p) p++; /* eat comma */ |
| 352 | } |
| 353 | |
| 354 | return NULL; |
| 355 | } |
| 356 | |
| 357 | static game_state *new_game(game_params *params, char *seed) |
| 358 | { |
| 359 | game_state *state = snew(game_state); |
| 360 | int w = params->w, h = params->h, n = params->n, wh = w*h; |
| 361 | int i; |
| 362 | char *p; |
| 363 | |
| 364 | state->w = w; |
| 365 | state->h = h; |
| 366 | state->n = n; |
| 367 | state->completed = 0; |
| 368 | state->movecount = 0; |
| 369 | state->lastx = state->lasty = state->lastr = -1; |
| 370 | |
| 371 | state->grid = snewn(wh, int); |
| 372 | |
| 373 | p = seed; |
| 374 | |
| 375 | for (i = 0; i < wh; i++) { |
| 376 | state->grid[i] = atoi(p); |
| 377 | while (*p >= '0' && *p <= '9') |
| 378 | p++; |
| 379 | |
| 380 | if (*p) p++; /* eat comma */ |
| 381 | } |
| 382 | |
| 383 | return state; |
| 384 | } |
| 385 | |
| 386 | static game_state *dup_game(game_state *state) |
| 387 | { |
| 388 | game_state *ret = snew(game_state); |
| 389 | |
| 390 | ret->w = state->w; |
| 391 | ret->h = state->h; |
| 392 | ret->n = state->n; |
| 393 | ret->completed = state->completed; |
| 394 | ret->movecount = state->movecount; |
| 395 | ret->lastx = state->lastx; |
| 396 | ret->lasty = state->lasty; |
| 397 | ret->lastr = state->lastr; |
| 398 | |
| 399 | ret->grid = snewn(ret->w * ret->h, int); |
| 400 | memcpy(ret->grid, state->grid, ret->w * ret->h * sizeof(int)); |
| 401 | |
| 402 | return ret; |
| 403 | } |
| 404 | |
| 405 | static void free_game(game_state *state) |
| 406 | { |
| 407 | sfree(state->grid); |
| 408 | sfree(state); |
| 409 | } |
| 410 | |
| 411 | static game_ui *new_ui(game_state *state) |
| 412 | { |
| 413 | return NULL; |
| 414 | } |
| 415 | |
| 416 | static void free_ui(game_ui *ui) |
| 417 | { |
| 418 | } |
| 419 | |
| 420 | static game_state *make_move(game_state *from, game_ui *ui, int x, int y, |
| 421 | int button) |
| 422 | { |
| 423 | int w = from->w, h = from->h, n = from->n, wh = w*h; |
| 424 | game_state *ret; |
| 425 | int dir; |
| 426 | |
| 427 | if (button == LEFT_BUTTON || button == RIGHT_BUTTON) { |
| 428 | /* |
| 429 | * Determine the coordinates of the click. We offset by n-1 |
| 430 | * half-blocks so that the user must click at the centre of |
| 431 | * a rotation region rather than at the corner. |
| 432 | */ |
| 433 | x -= (n-1) * TILE_SIZE / 2; |
| 434 | y -= (n-1) * TILE_SIZE / 2; |
| 435 | x = FROMCOORD(x); |
| 436 | y = FROMCOORD(y); |
| 437 | if (x < 0 || x > w-n || y < 0 || y > w-n) |
| 438 | return NULL; |
| 439 | |
| 440 | /* |
| 441 | * This is a valid move. Make it. |
| 442 | */ |
| 443 | ret = dup_game(from); |
| 444 | ret->movecount++; |
| 445 | dir = (button == LEFT_BUTTON ? 1 : -1); |
| 446 | do_rotate(ret->grid, w, h, n, x, y, dir); |
| 447 | ret->lastx = x; |
| 448 | ret->lasty = y; |
| 449 | ret->lastr = dir; |
| 450 | |
| 451 | /* |
| 452 | * See if the game has been completed. To do this we simply |
| 453 | * test that the grid contents are in increasing order. |
| 454 | */ |
| 455 | if (!ret->completed && grid_complete(ret->grid, wh)) |
| 456 | ret->completed = ret->movecount; |
| 457 | return ret; |
| 458 | } |
| 459 | return NULL; |
| 460 | } |
| 461 | |
| 462 | /* ---------------------------------------------------------------------- |
| 463 | * Drawing routines. |
| 464 | */ |
| 465 | |
| 466 | struct game_drawstate { |
| 467 | int started; |
| 468 | int w, h, bgcolour; |
| 469 | int *grid; |
| 470 | }; |
| 471 | |
| 472 | static void game_size(game_params *params, int *x, int *y) |
| 473 | { |
| 474 | *x = TILE_SIZE * params->w + 2 * BORDER; |
| 475 | *y = TILE_SIZE * params->h + 2 * BORDER; |
| 476 | } |
| 477 | |
| 478 | static float *game_colours(frontend *fe, game_state *state, int *ncolours) |
| 479 | { |
| 480 | float *ret = snewn(3 * NCOLOURS, float); |
| 481 | int i; |
| 482 | float max; |
| 483 | |
| 484 | frontend_default_colour(fe, &ret[COL_BACKGROUND * 3]); |
| 485 | |
| 486 | /* |
| 487 | * Drop the background colour so that the highlight is |
| 488 | * noticeably brighter than it while still being under 1. |
| 489 | */ |
| 490 | max = ret[COL_BACKGROUND*3]; |
| 491 | for (i = 1; i < 3; i++) |
| 492 | if (ret[COL_BACKGROUND*3+i] > max) |
| 493 | max = ret[COL_BACKGROUND*3+i]; |
| 494 | if (max * 1.2F > 1.0F) { |
| 495 | for (i = 0; i < 3; i++) |
| 496 | ret[COL_BACKGROUND*3+i] /= (max * 1.2F); |
| 497 | } |
| 498 | |
| 499 | for (i = 0; i < 3; i++) { |
| 500 | ret[COL_HIGHLIGHT * 3 + i] = ret[COL_BACKGROUND * 3 + i] * 1.2F; |
| 501 | ret[COL_HIGHLIGHT_GENTLE * 3 + i] = ret[COL_BACKGROUND * 3 + i] * 1.1F; |
| 502 | ret[COL_LOWLIGHT * 3 + i] = ret[COL_BACKGROUND * 3 + i] * 0.8F; |
| 503 | ret[COL_LOWLIGHT_GENTLE * 3 + i] = ret[COL_BACKGROUND * 3 + i] * 0.9F; |
| 504 | ret[COL_TEXT * 3 + i] = 0.0; |
| 505 | } |
| 506 | |
| 507 | *ncolours = NCOLOURS; |
| 508 | return ret; |
| 509 | } |
| 510 | |
| 511 | static game_drawstate *game_new_drawstate(game_state *state) |
| 512 | { |
| 513 | struct game_drawstate *ds = snew(struct game_drawstate); |
| 514 | int i; |
| 515 | |
| 516 | ds->started = FALSE; |
| 517 | ds->w = state->w; |
| 518 | ds->h = state->h; |
| 519 | ds->bgcolour = COL_BACKGROUND; |
| 520 | ds->grid = snewn(ds->w*ds->h, int); |
| 521 | for (i = 0; i < ds->w*ds->h; i++) |
| 522 | ds->grid[i] = -1; |
| 523 | |
| 524 | return ds; |
| 525 | } |
| 526 | |
| 527 | static void game_free_drawstate(game_drawstate *ds) |
| 528 | { |
| 529 | sfree(ds); |
| 530 | } |
| 531 | |
| 532 | struct rotation { |
| 533 | int cx, cy, cw, ch; /* clip region */ |
| 534 | int ox, oy; /* rotation origin */ |
| 535 | float c, s; /* cos and sin of rotation angle */ |
| 536 | int lc, rc, tc, bc; /* colours of tile edges */ |
| 537 | }; |
| 538 | |
| 539 | static void rotate(int *xy, struct rotation *rot) |
| 540 | { |
| 541 | if (rot) { |
| 542 | float xf = xy[0] - rot->ox, yf = xy[1] - rot->oy; |
| 543 | float xf2, yf2; |
| 544 | |
| 545 | xf2 = rot->c * xf + rot->s * yf; |
| 546 | yf2 = - rot->s * xf + rot->c * yf; |
| 547 | |
| 548 | xy[0] = xf2 + rot->ox + 0.5; /* round to nearest */ |
| 549 | xy[1] = yf2 + rot->oy + 0.5; /* round to nearest */ |
| 550 | } |
| 551 | } |
| 552 | |
| 553 | static void draw_tile(frontend *fe, game_state *state, int x, int y, |
| 554 | int tile, int flash_colour, struct rotation *rot) |
| 555 | { |
| 556 | int coords[8]; |
| 557 | char str[40]; |
| 558 | |
| 559 | if (rot) |
| 560 | clip(fe, rot->cx, rot->cy, rot->cw, rot->ch); |
| 561 | |
| 562 | /* |
| 563 | * We must draw each side of the tile's highlight separately, |
| 564 | * because in some cases (during rotation) they will all need |
| 565 | * to be different colours. |
| 566 | */ |
| 567 | |
| 568 | /* The centre point is common to all sides. */ |
| 569 | coords[4] = x + TILE_SIZE / 2; |
| 570 | coords[5] = y + TILE_SIZE / 2; |
| 571 | rotate(coords+4, rot); |
| 572 | |
| 573 | /* Right side. */ |
| 574 | coords[0] = x + TILE_SIZE - 1; |
| 575 | coords[1] = y + TILE_SIZE - 1; |
| 576 | rotate(coords+0, rot); |
| 577 | coords[2] = x + TILE_SIZE - 1; |
| 578 | coords[3] = y; |
| 579 | rotate(coords+2, rot); |
| 580 | draw_polygon(fe, coords, 3, TRUE, rot ? rot->rc : COL_LOWLIGHT); |
| 581 | draw_polygon(fe, coords, 3, FALSE, rot ? rot->rc : COL_LOWLIGHT); |
| 582 | |
| 583 | /* Bottom side. */ |
| 584 | coords[2] = x; |
| 585 | coords[3] = y + TILE_SIZE - 1; |
| 586 | rotate(coords+2, rot); |
| 587 | draw_polygon(fe, coords, 3, TRUE, rot ? rot->bc : COL_LOWLIGHT); |
| 588 | draw_polygon(fe, coords, 3, FALSE, rot ? rot->bc : COL_LOWLIGHT); |
| 589 | |
| 590 | /* Left side. */ |
| 591 | coords[0] = x; |
| 592 | coords[1] = y; |
| 593 | rotate(coords+0, rot); |
| 594 | draw_polygon(fe, coords, 3, TRUE, rot ? rot->lc : COL_HIGHLIGHT); |
| 595 | draw_polygon(fe, coords, 3, FALSE, rot ? rot->lc : COL_HIGHLIGHT); |
| 596 | |
| 597 | /* Top side. */ |
| 598 | coords[2] = x + TILE_SIZE - 1; |
| 599 | coords[3] = y; |
| 600 | rotate(coords+2, rot); |
| 601 | draw_polygon(fe, coords, 3, TRUE, rot ? rot->tc : COL_HIGHLIGHT); |
| 602 | draw_polygon(fe, coords, 3, FALSE, rot ? rot->tc : COL_HIGHLIGHT); |
| 603 | |
| 604 | if (rot) { |
| 605 | coords[0] = x + HIGHLIGHT_WIDTH; |
| 606 | coords[1] = y + HIGHLIGHT_WIDTH; |
| 607 | rotate(coords+0, rot); |
| 608 | coords[2] = x + HIGHLIGHT_WIDTH; |
| 609 | coords[3] = y + TILE_SIZE - 1 - HIGHLIGHT_WIDTH; |
| 610 | rotate(coords+2, rot); |
| 611 | coords[4] = x + TILE_SIZE - 1 - HIGHLIGHT_WIDTH; |
| 612 | coords[5] = y + TILE_SIZE - 1 - HIGHLIGHT_WIDTH; |
| 613 | rotate(coords+4, rot); |
| 614 | coords[6] = x + TILE_SIZE - 1 - HIGHLIGHT_WIDTH; |
| 615 | coords[7] = y + HIGHLIGHT_WIDTH; |
| 616 | rotate(coords+6, rot); |
| 617 | draw_polygon(fe, coords, 4, TRUE, flash_colour); |
| 618 | draw_polygon(fe, coords, 4, FALSE, flash_colour); |
| 619 | } else { |
| 620 | draw_rect(fe, x + HIGHLIGHT_WIDTH, y + HIGHLIGHT_WIDTH, |
| 621 | TILE_SIZE - 2*HIGHLIGHT_WIDTH, TILE_SIZE - 2*HIGHLIGHT_WIDTH, |
| 622 | flash_colour); |
| 623 | } |
| 624 | |
| 625 | coords[0] = x + TILE_SIZE/2; |
| 626 | coords[1] = y + TILE_SIZE/2; |
| 627 | rotate(coords+0, rot); |
| 628 | sprintf(str, "%d", tile); |
| 629 | draw_text(fe, coords[0], coords[1], |
| 630 | FONT_VARIABLE, TILE_SIZE/3, ALIGN_VCENTRE | ALIGN_HCENTRE, |
| 631 | COL_TEXT, str); |
| 632 | |
| 633 | if (rot) |
| 634 | unclip(fe); |
| 635 | |
| 636 | draw_update(fe, x, y, TILE_SIZE, TILE_SIZE); |
| 637 | } |
| 638 | |
| 639 | static int highlight_colour(float angle) |
| 640 | { |
| 641 | int colours[32] = { |
| 642 | COL_LOWLIGHT, |
| 643 | COL_LOWLIGHT_GENTLE, |
| 644 | COL_LOWLIGHT_GENTLE, |
| 645 | COL_LOWLIGHT_GENTLE, |
| 646 | COL_HIGHLIGHT_GENTLE, |
| 647 | COL_HIGHLIGHT_GENTLE, |
| 648 | COL_HIGHLIGHT_GENTLE, |
| 649 | COL_HIGHLIGHT, |
| 650 | COL_HIGHLIGHT, |
| 651 | COL_HIGHLIGHT, |
| 652 | COL_HIGHLIGHT, |
| 653 | COL_HIGHLIGHT, |
| 654 | COL_HIGHLIGHT, |
| 655 | COL_HIGHLIGHT, |
| 656 | COL_HIGHLIGHT, |
| 657 | COL_HIGHLIGHT, |
| 658 | COL_HIGHLIGHT, |
| 659 | COL_HIGHLIGHT_GENTLE, |
| 660 | COL_HIGHLIGHT_GENTLE, |
| 661 | COL_HIGHLIGHT_GENTLE, |
| 662 | COL_LOWLIGHT_GENTLE, |
| 663 | COL_LOWLIGHT_GENTLE, |
| 664 | COL_LOWLIGHT_GENTLE, |
| 665 | COL_LOWLIGHT, |
| 666 | COL_LOWLIGHT, |
| 667 | COL_LOWLIGHT, |
| 668 | COL_LOWLIGHT, |
| 669 | COL_LOWLIGHT, |
| 670 | COL_LOWLIGHT, |
| 671 | COL_LOWLIGHT, |
| 672 | COL_LOWLIGHT, |
| 673 | COL_LOWLIGHT, |
| 674 | }; |
| 675 | |
| 676 | return colours[(int)((angle + 2*PI) / (PI/16)) & 31]; |
| 677 | } |
| 678 | |
| 679 | static float game_anim_length(game_state *oldstate, game_state *newstate, |
| 680 | int dir) |
| 681 | { |
| 682 | return ANIM_PER_RADIUS_UNIT * sqrt(newstate->n-1); |
| 683 | } |
| 684 | |
| 685 | static float game_flash_length(game_state *oldstate, game_state *newstate, |
| 686 | int dir) |
| 687 | { |
| 688 | if (!oldstate->completed && newstate->completed) |
| 689 | return 2 * FLASH_FRAME; |
| 690 | else |
| 691 | return 0.0F; |
| 692 | } |
| 693 | |
| 694 | static void game_redraw(frontend *fe, game_drawstate *ds, game_state *oldstate, |
| 695 | game_state *state, int dir, game_ui *ui, |
| 696 | float animtime, float flashtime) |
| 697 | { |
| 698 | int i, bgcolour; |
| 699 | struct rotation srot, *rot; |
| 700 | int lastx = -1, lasty = -1, lastr = -1; |
| 701 | |
| 702 | if (flashtime > 0) { |
| 703 | int frame = (int)(flashtime / FLASH_FRAME); |
| 704 | bgcolour = (frame % 2 ? COL_LOWLIGHT : COL_HIGHLIGHT); |
| 705 | } else |
| 706 | bgcolour = COL_BACKGROUND; |
| 707 | |
| 708 | if (!ds->started) { |
| 709 | int coords[6]; |
| 710 | |
| 711 | draw_rect(fe, 0, 0, |
| 712 | TILE_SIZE * state->w + 2 * BORDER, |
| 713 | TILE_SIZE * state->h + 2 * BORDER, COL_BACKGROUND); |
| 714 | draw_update(fe, 0, 0, |
| 715 | TILE_SIZE * state->w + 2 * BORDER, |
| 716 | TILE_SIZE * state->h + 2 * BORDER); |
| 717 | |
| 718 | /* |
| 719 | * Recessed area containing the whole puzzle. |
| 720 | */ |
| 721 | coords[0] = COORD(state->w) + HIGHLIGHT_WIDTH - 1; |
| 722 | coords[1] = COORD(state->h) + HIGHLIGHT_WIDTH - 1; |
| 723 | coords[2] = COORD(state->w) + HIGHLIGHT_WIDTH - 1; |
| 724 | coords[3] = COORD(0) - HIGHLIGHT_WIDTH; |
| 725 | coords[4] = COORD(0) - HIGHLIGHT_WIDTH; |
| 726 | coords[5] = COORD(state->h) + HIGHLIGHT_WIDTH - 1; |
| 727 | draw_polygon(fe, coords, 3, TRUE, COL_HIGHLIGHT); |
| 728 | draw_polygon(fe, coords, 3, FALSE, COL_HIGHLIGHT); |
| 729 | |
| 730 | coords[1] = COORD(0) - HIGHLIGHT_WIDTH; |
| 731 | coords[0] = COORD(0) - HIGHLIGHT_WIDTH; |
| 732 | draw_polygon(fe, coords, 3, TRUE, COL_LOWLIGHT); |
| 733 | draw_polygon(fe, coords, 3, FALSE, COL_LOWLIGHT); |
| 734 | |
| 735 | ds->started = TRUE; |
| 736 | } |
| 737 | |
| 738 | /* |
| 739 | * If we're drawing any rotated tiles, sort out the rotation |
| 740 | * parameters, and also zap the rotation region to the |
| 741 | * background colour before doing anything else. |
| 742 | */ |
| 743 | if (oldstate) { |
| 744 | float angle; |
| 745 | float anim_max = game_anim_length(oldstate, state, dir); |
| 746 | |
| 747 | if (dir > 0) { |
| 748 | lastx = state->lastx; |
| 749 | lasty = state->lasty; |
| 750 | lastr = state->lastr; |
| 751 | } else { |
| 752 | lastx = oldstate->lastx; |
| 753 | lasty = oldstate->lasty; |
| 754 | lastr = -oldstate->lastr; |
| 755 | } |
| 756 | |
| 757 | rot = &srot; |
| 758 | rot->cx = COORD(lastx); |
| 759 | rot->cy = COORD(lasty); |
| 760 | rot->cw = rot->ch = TILE_SIZE * state->n; |
| 761 | rot->ox = rot->cx + rot->cw/2; |
| 762 | rot->oy = rot->cy + rot->ch/2; |
| 763 | angle = (-PI/2 * lastr) * (1.0 - animtime / anim_max); |
| 764 | rot->c = cos(angle); |
| 765 | rot->s = sin(angle); |
| 766 | |
| 767 | /* |
| 768 | * Sort out the colours of the various sides of the tile. |
| 769 | */ |
| 770 | rot->lc = highlight_colour(PI + angle); |
| 771 | rot->rc = highlight_colour(angle); |
| 772 | rot->tc = highlight_colour(PI/2 + angle); |
| 773 | rot->bc = highlight_colour(-PI/2 + angle); |
| 774 | |
| 775 | draw_rect(fe, rot->cx, rot->cy, rot->cw, rot->ch, bgcolour); |
| 776 | } else |
| 777 | rot = NULL; |
| 778 | |
| 779 | /* |
| 780 | * Now draw each tile. |
| 781 | */ |
| 782 | for (i = 0; i < state->w * state->h; i++) { |
| 783 | int t; |
| 784 | int tx = i % state->w, ty = i / state->w; |
| 785 | |
| 786 | /* |
| 787 | * Figure out what should be displayed at this location. |
| 788 | * Usually it will be state->grid[i], unless we're in the |
| 789 | * middle of animating an actual rotation and this cell is |
| 790 | * within the rotation region, in which case we set -1 |
| 791 | * (always display). |
| 792 | */ |
| 793 | if (oldstate && lastx >= 0 && lasty >= 0 && |
| 794 | tx >= lastx && tx < lastx + state->n && |
| 795 | ty >= lasty && ty < lasty + state->n) |
| 796 | t = -1; |
| 797 | else |
| 798 | t = state->grid[i]; |
| 799 | |
| 800 | if (ds->bgcolour != bgcolour || /* always redraw when flashing */ |
| 801 | ds->grid[i] != t || ds->grid[i] == -1 || t == -1) { |
| 802 | int x = COORD(tx), y = COORD(ty); |
| 803 | |
| 804 | draw_tile(fe, state, x, y, state->grid[i], bgcolour, rot); |
| 805 | ds->grid[i] = t; |
| 806 | } |
| 807 | } |
| 808 | ds->bgcolour = bgcolour; |
| 809 | |
| 810 | /* |
| 811 | * Update the status bar. |
| 812 | */ |
| 813 | { |
| 814 | char statusbuf[256]; |
| 815 | |
| 816 | /* |
| 817 | * Don't show the new status until we're also showing the |
| 818 | * new _state_ - after the game animation is complete. |
| 819 | */ |
| 820 | if (oldstate) |
| 821 | state = oldstate; |
| 822 | |
| 823 | sprintf(statusbuf, "%sMoves: %d", |
| 824 | (state->completed ? "COMPLETED! " : ""), |
| 825 | (state->completed ? state->completed : state->movecount)); |
| 826 | |
| 827 | status_bar(fe, statusbuf); |
| 828 | } |
| 829 | } |
| 830 | |
| 831 | static int game_wants_statusbar(void) |
| 832 | { |
| 833 | return TRUE; |
| 834 | } |
| 835 | |
| 836 | #ifdef COMBINED |
| 837 | #define thegame twiddle |
| 838 | #endif |
| 839 | |
| 840 | const struct game thegame = { |
| 841 | "Twiddle", "games.twiddle", TRUE, |
| 842 | default_params, |
| 843 | game_fetch_preset, |
| 844 | decode_params, |
| 845 | encode_params, |
| 846 | free_params, |
| 847 | dup_params, |
| 848 | game_configure, |
| 849 | custom_params, |
| 850 | validate_params, |
| 851 | new_game_seed, |
| 852 | validate_seed, |
| 853 | new_game, |
| 854 | dup_game, |
| 855 | free_game, |
| 856 | new_ui, |
| 857 | free_ui, |
| 858 | make_move, |
| 859 | game_size, |
| 860 | game_colours, |
| 861 | game_new_drawstate, |
| 862 | game_free_drawstate, |
| 863 | game_redraw, |
| 864 | game_anim_length, |
| 865 | game_flash_length, |
| 866 | game_wants_statusbar, |
| 867 | }; |