1 | /* |
1 | /* |
2 | CrossFire, A Multiplayer game for X-windows |
2 | * CrossFire, A Multiplayer game for X-windows |
3 | |
3 | * |
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4 | * Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team |
4 | Copyright (C) 2002 Mark Wedel & Crossfire Development Team |
5 | * Copyright (C) 2002 Mark Wedel & Crossfire Development Team |
5 | Copyright (C) 1992 Frank Tore Johansen |
6 | * Copyright (C) 1992 Frank Tore Johansen |
6 | |
7 | * |
7 | This program is free software; you can redistribute it and/or modify |
8 | * This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by |
9 | * it under the terms of the GNU General Public License as published by |
9 | the Free Software Foundation; either version 2 of the License, or |
10 | * the Free Software Foundation; either version 2 of the License, or |
10 | (at your option) any later version. |
11 | * (at your option) any later version. |
11 | |
12 | * |
12 | This program is distributed in the hope that it will be useful, |
13 | * This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | GNU General Public License for more details. |
16 | * GNU General Public License for more details. |
16 | |
17 | * |
17 | You should have received a copy of the GNU General Public License |
18 | * 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 | * along with this program; if not, write to the Free Software |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
20 | |
21 | * |
21 | The authors can be reached via e-mail at <crossfire@schmorp.de> |
22 | * The authors can be reached via e-mail at <crossfire@schmorp.de> |
22 | */ |
23 | */ |
23 | |
24 | |
24 | /* Nov 95 - inserted USE_LIGHTING code stuff in here - b.t. */ |
25 | /* Nov 95 - inserted USE_LIGHTING code stuff in here - b.t. */ |
25 | |
26 | |
26 | #include <global.h> |
27 | #include <global.h> |
27 | #include <funcpoint.h> |
28 | #include <funcpoint.h> |
28 | #include <math.h> |
29 | #include <math.h> |
29 | |
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30 | |
30 | |
31 | /* Distance must be less than this for the object to be blocked. |
31 | /* Distance must be less than this for the object to be blocked. |
32 | * An object is 1.0 wide, so if set to 0.5, it means the object |
32 | * An object is 1.0 wide, so if set to 0.5, it means the object |
33 | * that blocks half the view (0.0 is complete block) will |
33 | * that blocks half the view (0.0 is complete block) will |
34 | * block view in our tables. |
34 | * block view in our tables. |
… | |
… | |
41 | { |
41 | { |
42 | int x[4], y[4]; |
42 | int x[4], y[4]; |
43 | int index; |
43 | int index; |
44 | } blocks; |
44 | } blocks; |
45 | |
45 | |
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46 | // 31/32 == a speed hack |
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47 | // we would like to use 32 for speed, but the code loops endlessly |
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48 | // then, reason not yet identified, so only make the array use 32, |
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49 | // not the define's. |
46 | blocks block[MAP_CLIENT_X][MAP_CLIENT_Y]; |
50 | blocks block[MAP_CLIENT_X][MAP_CLIENT_Y == 31 ? 32 : MAP_CLIENT_Y]; |
47 | |
51 | |
48 | static void expand_lighted_sight (object *op); |
52 | static void expand_lighted_sight (object *op); |
49 | |
53 | |
50 | /* |
54 | /* |
51 | * Used to initialise the array used by the LOS routines. |
55 | * Used to initialise the array used by the LOS routines. |
… | |
… | |
90 | |
94 | |
91 | void |
95 | void |
92 | init_block (void) |
96 | init_block (void) |
93 | { |
97 | { |
94 | int x, y, dx, dy, i; |
98 | int x, y, dx, dy, i; |
95 | static int block_x[3] = { -1, -1, 0 }, block_y[3] = |
99 | static int block_x[3] = { -1, -1, 0 }, |
96 | { |
100 | block_y[3] = { -1, 0, -1 }; |
97 | -1, 0, -1}; |
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98 | |
101 | |
99 | for (x = 0; x < MAP_CLIENT_X; x++) |
102 | for (x = 0; x < MAP_CLIENT_X; x++) |
100 | for (y = 0; y < MAP_CLIENT_Y; y++) |
103 | for (y = 0; y < MAP_CLIENT_Y; y++) |
101 | { |
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102 | block[x][y].index = 0; |
104 | block[x][y].index = 0; |
103 | } |
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104 | |
105 | |
105 | |
106 | |
106 | /* The table should be symmetric, so only do the upper left |
107 | /* The table should be symmetric, so only do the upper left |
107 | * quadrant - makes the processing easier. |
108 | * quadrant - makes the processing easier. |
108 | */ |
109 | */ |
… | |
… | |
125 | /* For simplicity, we mirror the coordinates to block the other |
126 | /* For simplicity, we mirror the coordinates to block the other |
126 | * quadrants. |
127 | * quadrants. |
127 | */ |
128 | */ |
128 | set_block (x, y, dx, dy); |
129 | set_block (x, y, dx, dy); |
129 | if (x == MAP_CLIENT_X / 2) |
130 | if (x == MAP_CLIENT_X / 2) |
130 | { |
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131 | set_block (x, MAP_CLIENT_Y - y - 1, dx, MAP_CLIENT_Y - dy - 1); |
131 | set_block (x, MAP_CLIENT_Y - y - 1, dx, MAP_CLIENT_Y - dy - 1); |
132 | } |
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133 | else if (y == MAP_CLIENT_Y / 2) |
132 | else if (y == MAP_CLIENT_Y / 2) |
134 | { |
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135 | set_block (MAP_CLIENT_X - x - 1, y, MAP_CLIENT_X - dx - 1, dy); |
133 | set_block (MAP_CLIENT_X - x - 1, y, MAP_CLIENT_X - dx - 1, dy); |
136 | } |
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|
137 | } |
134 | } |
138 | else |
135 | else |
139 | { |
136 | { |
140 | float d1, r, s, l; |
137 | float d1, r, s, l; |
141 | |
138 | |
… | |
… | |
175 | * that if some particular space is blocked, it blocks |
172 | * that if some particular space is blocked, it blocks |
176 | * the view of the spaces 'behind' it, and those blocked |
173 | * the view of the spaces 'behind' it, and those blocked |
177 | * spaces behind it may block other spaces, etc. |
174 | * spaces behind it may block other spaces, etc. |
178 | * In this way, the chain of visibility is set. |
175 | * In this way, the chain of visibility is set. |
179 | */ |
176 | */ |
180 | |
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181 | static void |
177 | static void |
182 | set_wall (object *op, int x, int y) |
178 | set_wall (object *op, int x, int y) |
183 | { |
179 | { |
184 | int i; |
180 | int i; |
185 | |
181 | |
… | |
… | |
293 | op->contr->blocked_los[dx][dy] = -1; |
289 | op->contr->blocked_los[dx][dy] = -1; |
294 | } |
290 | } |
295 | } |
291 | } |
296 | } |
292 | } |
297 | |
293 | |
298 | if (MAP_DARKNESS (op->map) > 0) /* player is on a dark map */ |
294 | if (op->map->darkness > 0) /* player is on a dark map */ |
299 | expand_lighted_sight (op); |
295 | expand_lighted_sight (op); |
300 | |
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301 | |
296 | |
302 | /* clear mark squares */ |
297 | /* clear mark squares */ |
303 | for (x = 0; x < op->contr->ns->mapx; x++) |
298 | for (x = 0; x < op->contr->ns->mapx; x++) |
304 | for (y = 0; y < op->contr->ns->mapy; y++) |
299 | for (y = 0; y < op->contr->ns->mapy; y++) |
305 | if (op->contr->blocked_los[x][y] < 0) |
300 | if (op->contr->blocked_los[x][y] < 0) |
306 | op->contr->blocked_los[x][y] = 0; |
301 | op->contr->blocked_los[x][y] = 0; |
307 | } |
302 | } |
308 | |
303 | |
309 | |
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310 | |
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311 | |
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312 | /* returns true if op carries one or more lights |
304 | /* returns true if op carries one or more lights |
313 | * This is a trivial function now days, but it used to |
305 | * This is a trivial function now days, but it used to |
314 | * be a bit longer. Probably better for callers to just |
306 | * be a bit longer. Probably better for callers to just |
315 | * check the op->glow_radius instead of calling this. |
307 | * check the op->glow_radius instead of calling this. |
316 | */ |
308 | */ |
… | |
… | |
330 | { |
322 | { |
331 | int x, y, darklevel, ax, ay, basex, basey, mflags, light, x1, y1; |
323 | int x, y, darklevel, ax, ay, basex, basey, mflags, light, x1, y1; |
332 | maptile *m = op->map; |
324 | maptile *m = op->map; |
333 | sint16 nx, ny; |
325 | sint16 nx, ny; |
334 | |
326 | |
335 | darklevel = MAP_DARKNESS (m); |
327 | darklevel = m->darkness; |
336 | |
328 | |
337 | /* If the player can see in the dark, lower the darklevel for him */ |
329 | /* If the player can see in the dark, lower the darklevel for him */ |
338 | if (QUERY_FLAG (op, FLAG_SEE_IN_DARK)) |
330 | if (QUERY_FLAG (op, FLAG_SEE_IN_DARK)) |
339 | darklevel -= 2; |
331 | darklevel -= 2; |
340 | |
332 | |
… | |
… | |
349 | /* Do a sanity check. If not valid, some code below may do odd |
341 | /* Do a sanity check. If not valid, some code below may do odd |
350 | * things. |
342 | * things. |
351 | */ |
343 | */ |
352 | if (darklevel > MAX_DARKNESS) |
344 | if (darklevel > MAX_DARKNESS) |
353 | { |
345 | { |
354 | LOG (llevError, "Map darkness for %s on %s is too high (%d)\n", &op->name, op->map->path, darklevel); |
346 | LOG (llevError, "Map darkness for %s on %s is too high (%d)\n", &op->name, &op->map->path, darklevel); |
355 | darklevel = MAX_DARKNESS; |
347 | darklevel = MAX_DARKNESS; |
356 | } |
348 | } |
357 | |
349 | |
358 | /* First, limit player furthest (unlighted) vision */ |
350 | /* First, limit player furthest (unlighted) vision */ |
359 | for (x = 0; x < op->contr->ns->mapx; x++) |
351 | for (x = 0; x < op->contr->ns->mapx; x++) |
… | |
… | |
394 | #endif |
386 | #endif |
395 | for (ax = basex - light; ax <= basex + light; ax++) |
387 | for (ax = basex - light; ax <= basex + light; ax++) |
396 | { |
388 | { |
397 | if (ax < 0 || ax >= op->contr->ns->mapx) |
389 | if (ax < 0 || ax >= op->contr->ns->mapx) |
398 | continue; |
390 | continue; |
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391 | |
399 | for (ay = basey - light; ay <= basey + light; ay++) |
392 | for (ay = basey - light; ay <= basey + light; ay++) |
400 | { |
393 | { |
401 | if (ay < 0 || ay >= op->contr->ns->mapy) |
394 | if (ay < 0 || ay >= op->contr->ns->mapy) |
402 | continue; |
395 | continue; |
403 | |
396 | |
… | |
… | |
410 | */ |
403 | */ |
411 | if (op->contr->blocked_los[ax][ay] != 100) |
404 | if (op->contr->blocked_los[ax][ay] != 100) |
412 | { |
405 | { |
413 | x1 = abs (basex - ax) * abs (basex - ax); |
406 | x1 = abs (basex - ax) * abs (basex - ax); |
414 | y1 = abs (basey - ay) * abs (basey - ay); |
407 | y1 = abs (basey - ay) * abs (basey - ay); |
415 | if (light > 0) |
408 | |
416 | op->contr->blocked_los[ax][ay] -= MAX ((light - isqrt (x1 + y1)), 0); |
409 | if (light > 0) op->contr->blocked_los[ax][ay] -= max (light - isqrt (x1 + y1), 0); |
417 | if (light < 0) |
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418 | op->contr->blocked_los[ax][ay] -= MIN ((light + isqrt (x1 + y1)), 0); |
410 | if (light < 0) op->contr->blocked_los[ax][ay] -= min (light + isqrt (x1 + y1), 0); |
419 | } |
411 | } |
420 | } /* for ay */ |
412 | } |
421 | } /* for ax */ |
413 | } |
422 | } /* if this space is providing light */ |
414 | } |
423 | } /* for y */ |
415 | } |
424 | } /* for x */ |
416 | } |
425 | |
417 | |
426 | /* Outdoor should never really be completely pitch black dark like |
418 | /* Outdoor should never really be completely pitch black dark like |
427 | * a dungeon, so let the player at least see a little around themselves |
419 | * a dungeon, so let the player at least see a little around themselves |
428 | */ |
420 | */ |
429 | if (op->map->outdoor && darklevel > (MAX_DARKNESS - 3)) |
421 | if (op->map->outdoor && darklevel > (MAX_DARKNESS - 3)) |
… | |
… | |
436 | { |
428 | { |
437 | if (op->contr->blocked_los[x + op->contr->ns->mapx / 2][y + op->contr->ns->mapy / 2] > (MAX_DARKNESS - 2)) |
429 | if (op->contr->blocked_los[x + op->contr->ns->mapx / 2][y + op->contr->ns->mapy / 2] > (MAX_DARKNESS - 2)) |
438 | op->contr->blocked_los[x + op->contr->ns->mapx / 2][y + op->contr->ns->mapy / 2] = MAX_DARKNESS - 2; |
430 | op->contr->blocked_los[x + op->contr->ns->mapx / 2][y + op->contr->ns->mapy / 2] = MAX_DARKNESS - 2; |
439 | } |
431 | } |
440 | } |
432 | } |
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433 | |
441 | /* grant some vision to the player, based on the darklevel */ |
434 | /* grant some vision to the player, based on the darklevel */ |
442 | for (x = darklevel - MAX_DARKNESS; x < MAX_DARKNESS + 1 - darklevel; x++) |
435 | for (x = darklevel - MAX_DARKNESS; x < MAX_DARKNESS + 1 - darklevel; x++) |
443 | for (y = darklevel - MAX_DARKNESS; y < MAX_DARKNESS + 1 - darklevel; y++) |
436 | for (y = darklevel - MAX_DARKNESS; y < MAX_DARKNESS + 1 - darklevel; y++) |
444 | if (!(op->contr->blocked_los[x + op->contr->ns->mapx / 2][y + op->contr->ns->mapy / 2] == 100)) |
437 | if (!(op->contr->blocked_los[x + op->contr->ns->mapx / 2][y + op->contr->ns->mapy / 2] == 100)) |
445 | op->contr->blocked_los[x + op->contr->ns->mapx / 2][y + op->contr->ns->mapy / 2] -= |
438 | op->contr->blocked_los[x + op->contr->ns->mapx / 2][y + op->contr->ns->mapy / 2] -= |
… | |
… | |
449 | /* blinded_sight() - sets all veiwable squares to blocked except |
442 | /* blinded_sight() - sets all veiwable squares to blocked except |
450 | * for the one the central one that the player occupies. A little |
443 | * for the one the central one that the player occupies. A little |
451 | * odd that you can see yourself (and what your standing on), but |
444 | * odd that you can see yourself (and what your standing on), but |
452 | * really need for any reasonable game play. |
445 | * really need for any reasonable game play. |
453 | */ |
446 | */ |
454 | |
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455 | static void |
447 | static void |
456 | blinded_sight (object *op) |
448 | blinded_sight (object *op) |
457 | { |
449 | { |
458 | int x, y; |
450 | int x, y; |
459 | |
451 | |
… | |
… | |
487 | * could be examined multile times, as each path would be looked at. |
479 | * could be examined multile times, as each path would be looked at. |
488 | */ |
480 | */ |
489 | for (x = (MAP_CLIENT_X - op->contr->ns->mapx) / 2 - 1; x < (MAP_CLIENT_X + op->contr->ns->mapx) / 2 + 1; x++) |
481 | for (x = (MAP_CLIENT_X - op->contr->ns->mapx) / 2 - 1; x < (MAP_CLIENT_X + op->contr->ns->mapx) / 2 + 1; x++) |
490 | for (y = (MAP_CLIENT_Y - op->contr->ns->mapy) / 2 - 1; y < (MAP_CLIENT_Y + op->contr->ns->mapy) / 2 + 1; y++) |
482 | for (y = (MAP_CLIENT_Y - op->contr->ns->mapy) / 2 - 1; y < (MAP_CLIENT_Y + op->contr->ns->mapy) / 2 + 1; y++) |
491 | check_wall (op, x, y); |
483 | check_wall (op, x, y); |
492 | |
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493 | |
484 | |
494 | /* do the los of the player. 3 (potential) cases */ |
485 | /* do the los of the player. 3 (potential) cases */ |
495 | if (QUERY_FLAG (op, FLAG_BLIND)) /* player is blind */ |
486 | if (QUERY_FLAG (op, FLAG_BLIND)) /* player is blind */ |
496 | blinded_sight (op); |
487 | blinded_sight (op); |
497 | else |
488 | else |
498 | expand_sight (op); |
489 | expand_sight (op); |
499 | |
490 | |
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491 | //TODO: no range-checking whatsoever :( |
500 | if (QUERY_FLAG (op, FLAG_XRAYS)) |
492 | if (QUERY_FLAG (op, FLAG_XRAYS)) |
501 | { |
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502 | int x, y; |
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503 | |
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504 | for (x = -2; x <= 2; x++) |
493 | for (int x = -2; x <= 2; x++) |
505 | for (y = -2; y <= 2; y++) |
494 | for (int y = -2; y <= 2; y++) |
506 | op->contr->blocked_los[dx + x][dy + y] = 0; |
495 | op->contr->blocked_los[dx + x][dy + y] = 0; |
507 | } |
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|
508 | } |
496 | } |
509 | |
497 | |
510 | /* update all_map_los is like update_all_los below, |
498 | /* update all_map_los is like update_all_los below, |
511 | * but updates everyone on the map, no matter where they |
499 | * but updates everyone on the map, no matter where they |
512 | * are. This generally should not be used, as a per |
500 | * are. This generally should not be used, as a per |
… | |
… | |
579 | * and then add the players location, which gives |
567 | * and then add the players location, which gives |
580 | * a distance. |
568 | * a distance. |
581 | */ |
569 | */ |
582 | else if (pl->ob->map == map->tile_map[0]) |
570 | else if (pl->ob->map == map->tile_map[0]) |
583 | { |
571 | { |
584 | if ((abs (pl->ob->x - x) <= pl->ns->mapx / 2) && (abs (y + MAP_HEIGHT (map->tile_map[0]) - pl->ob->y) <= pl->ns->mapy / 2)) |
572 | if ((abs (pl->ob->x - x) <= pl->ns->mapx / 2) && (abs (y + map->tile_map[0]->height - pl->ob->y) <= pl->ns->mapy / 2)) |
585 | pl->do_los = 1; |
573 | pl->do_los = 1; |
586 | } |
574 | } |
587 | else if (pl->ob->map == map->tile_map[2]) |
575 | else if (pl->ob->map == map->tile_map[2]) |
588 | { |
576 | { |
589 | if ((abs (pl->ob->x - x) <= pl->ns->mapx / 2) && (abs (pl->ob->y + MAP_HEIGHT (map) - y) <= pl->ns->mapy / 2)) |
577 | if ((abs (pl->ob->x - x) <= pl->ns->mapx / 2) && (abs (pl->ob->y + map->height - y) <= pl->ns->mapy / 2)) |
590 | pl->do_los = 1; |
578 | pl->do_los = 1; |
591 | } |
579 | } |
592 | else if (pl->ob->map == map->tile_map[1]) |
580 | else if (pl->ob->map == map->tile_map[1]) |
593 | { |
581 | { |
594 | if ((abs (pl->ob->x + MAP_WIDTH (map) - x) <= pl->ns->mapx / 2) && (abs (pl->ob->y - y) <= pl->ns->mapy / 2)) |
582 | if ((abs (pl->ob->x + map->width - x) <= pl->ns->mapx / 2) && (abs (pl->ob->y - y) <= pl->ns->mapy / 2)) |
595 | pl->do_los = 1; |
583 | pl->do_los = 1; |
596 | } |
584 | } |
597 | else if (pl->ob->map == map->tile_map[3]) |
585 | else if (pl->ob->map == map->tile_map[3]) |
598 | { |
586 | { |
599 | if ((abs (x + MAP_WIDTH (map->tile_map[3]) - pl->ob->x) <= pl->ns->mapx / 2) && (abs (pl->ob->y - y) <= pl->ns->mapy / 2)) |
587 | if ((abs (x + map->tile_map[3]->width - pl->ob->x) <= pl->ns->mapx / 2) && (abs (pl->ob->y - y) <= pl->ns->mapy / 2)) |
600 | pl->do_los = 1; |
588 | pl->do_los = 1; |
601 | } |
589 | } |
602 | } |
590 | } |
603 | } |
591 | } |
604 | |
592 | |