3 Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 #include "util/numeric.h"
23 #include "mapgen_v5.h"
24 #include "mapgen_v6.h"
25 #include "mapgen_v7.h"
28 NoiseParams nparams_caveliquids(0, 1, v3f(150.0, 150.0, 150.0), 776, 3, 0.6, 2.0);
34 CavesRandomWalk::CavesRandomWalk(Mapgen *mg, PseudoRandom *ps)
38 this->ndef = mg->ndef;
39 this->water_level = mg->water_level;
41 c_water_source = ndef->getId("mapgen_water_source");
42 c_lava_source = ndef->getId("mapgen_lava_source");
43 c_ice = ndef->getId("mapgen_ice");
44 this->np_caveliquids = &nparams_caveliquids;
45 this->ystride = mg->csize.X;
46 this->lava_depth = DEFAULT_LAVA_DEPTH;
48 if (c_ice == CONTENT_IGNORE)
51 dswitchint = ps->range(1, 14);
52 flooded = ps->range(1, 2) == 2;
54 part_max_length_rs = ps->range(2, 4);
55 tunnel_routepoints = ps->range(5, ps->range(15, 30));
56 min_tunnel_diameter = 5;
57 max_tunnel_diameter = ps->range(7, ps->range(8, 24));
59 large_cave_is_flat = (ps->range(0, 1) == 0);
63 void CavesRandomWalk::makeCave(v3s16 nmin, v3s16 nmax, int max_stone_height)
67 main_direction = v3f(0, 0, 0);
69 // Allowed route area size in nodes
70 ar = node_max - node_min + v3s16(1, 1, 1);
71 // Area starting point in nodes
75 //(this should be more than the maximum radius of the tunnel)
77 s16 more = MYMAX(MAP_BLOCKSIZE - max_tunnel_diameter / 2 - insure, 1);
78 ar += v3s16(1,0,1) * more * 2;
79 of -= v3s16(1,0,1) * more;
82 // Allow half a diameter + 7 over stone surface
83 route_y_max = -of.Y + max_stone_y + max_tunnel_diameter / 2 + 7;
85 // Limit maximum to area
86 route_y_max = rangelim(route_y_max, 0, ar.Y - 1);
89 if (node_min.Y < water_level && node_max.Y > water_level) {
90 minpos = water_level - max_tunnel_diameter / 3 - of.Y;
91 route_y_max = water_level + max_tunnel_diameter / 3 - of.Y;
93 route_y_min = ps->range(minpos, minpos + max_tunnel_diameter);
94 route_y_min = rangelim(route_y_min, 0, route_y_max);
96 s16 route_start_y_min = route_y_min;
97 s16 route_start_y_max = route_y_max;
99 route_start_y_min = rangelim(route_start_y_min, 0, ar.Y - 1);
100 route_start_y_max = rangelim(route_start_y_max, route_start_y_min, ar.Y - 1);
102 // Randomize starting position
104 (float)(ps->next() % ar.X) + 0.5,
105 (float)(ps->range(route_start_y_min, route_start_y_max)) + 0.5,
106 (float)(ps->next() % ar.Z) + 0.5
109 // Add generation notify begin event
110 v3s16 abs_pos(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
111 GenNotifyType notifytype = GENNOTIFY_LARGECAVE_BEGIN;
112 mg->gennotify.addEvent(notifytype, abs_pos);
114 // Generate some tunnel starting from orp
115 for (u16 j = 0; j < tunnel_routepoints; j++)
116 makeTunnel(j % dswitchint == 0);
118 // Add generation notify end event
119 abs_pos = v3s16(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
120 notifytype = GENNOTIFY_LARGECAVE_END;
121 mg->gennotify.addEvent(notifytype, abs_pos);
125 void CavesRandomWalk::makeTunnel(bool dirswitch)
128 s16 min_d = min_tunnel_diameter;
129 s16 max_d = max_tunnel_diameter;
130 rs = ps->range(min_d, max_d);
131 s16 rs_part_max_length_rs = rs * part_max_length_rs;
135 rs_part_max_length_rs,
136 rs_part_max_length_rs / 2,
137 rs_part_max_length_rs
141 // Jump downward sometimes
143 (float)(ps->next() % maxlen.X) - (float)maxlen.X / 2,
144 (float)(ps->next() % maxlen.Y) - (float)maxlen.Y / 2,
145 (float)(ps->next() % maxlen.Z) - (float)maxlen.Z / 2
148 // Do not make caves that are above ground.
149 // It is only necessary to check the startpoint and endpoint.
150 v3s16 orpi(orp.X, orp.Y, orp.Z);
151 v3s16 veci(vec.X, vec.Y, vec.Z);
154 p = orpi + veci + of + rs / 2;
155 if (p.Z >= node_min.Z && p.Z <= node_max.Z &&
156 p.X >= node_min.X && p.X <= node_max.X) {
157 u32 index = (p.Z - node_min.Z) * ystride + (p.X - node_min.X);
158 s16 h = mg->heightmap[index];
161 } else if (p.Y > water_level) {
162 return; // If it's not in our heightmap, use a simple heuristic
165 p = orpi + of + rs / 2;
166 if (p.Z >= node_min.Z && p.Z <= node_max.Z &&
167 p.X >= node_min.X && p.X <= node_max.X) {
168 u32 index = (p.Z - node_min.Z) * ystride + (p.X - node_min.X);
169 s16 h = mg->heightmap[index];
172 } else if (p.Y > water_level) {
176 vec += main_direction;
181 else if (rp.X >= ar.X)
184 if (rp.Y < route_y_min)
186 else if (rp.Y >= route_y_max)
187 rp.Y = route_y_max - 1;
191 else if (rp.Z >= ar.Z)
196 float veclen = vec.getLength();
200 // Every second section is rough
201 bool randomize_xz = (ps->range(1, 2) == 1);
204 for (float f = 0; f < 1.0; f += 1.0 / veclen)
205 carveRoute(vec, f, randomize_xz);
211 void CavesRandomWalk::carveRoute(v3f vec, float f, bool randomize_xz)
213 MapNode airnode(CONTENT_AIR);
214 MapNode waternode(c_water_source);
215 MapNode lavanode(c_lava_source);
217 v3s16 startp(orp.X, orp.Y, orp.Z);
220 float nval = NoisePerlin3D(np_caveliquids, startp.X,
221 startp.Y, startp.Z, mg->seed);
222 MapNode liquidnode = (nval < 0.40 && node_max.Y < lava_depth) ?
223 lavanode : waternode;
225 v3f fp = orp + vec * f;
226 fp.X += 0.1 * ps->range(-10, 10);
227 fp.Z += 0.1 * ps->range(-10, 10);
228 v3s16 cp(fp.X, fp.Y, fp.Z);
233 d0 += ps->range(-1, 1);
234 d1 += ps->range(-1, 1);
237 for (s16 z0 = d0; z0 <= d1; z0++) {
238 s16 si = rs / 2 - MYMAX(0, abs(z0) - rs / 7 - 1);
239 for (s16 x0 = -si - ps->range(0,1); x0 <= si - 1 + ps->range(0,1); x0++) {
240 s16 maxabsxz = MYMAX(abs(x0), abs(z0));
242 s16 si2 = rs / 2 - MYMAX(0, maxabsxz - rs / 7 - 1);
244 for (s16 y0 = -si2; y0 <= si2; y0++) {
245 if (large_cave_is_flat) {
246 // Make large caves not so tall
247 if (rs > 7 && abs(y0) >= rs / 3)
251 v3s16 p(cp.X + x0, cp.Y + y0, cp.Z + z0);
254 if (vm->m_area.contains(p) == false)
257 u32 i = vm->m_area.index(p);
258 content_t c = vm->m_data[i].getContent();
259 if (!ndef->get(c).is_ground_content)
262 int full_ymin = node_min.Y - MAP_BLOCKSIZE;
263 int full_ymax = node_max.Y + MAP_BLOCKSIZE;
265 if (flooded && full_ymin < water_level && full_ymax > water_level)
266 vm->m_data[i] = (p.Y <= water_level) ? waternode : airnode;
267 else if (flooded && full_ymax < water_level)
268 vm->m_data[i] = (p.Y < startp.Y - 4) ? liquidnode : airnode;
270 vm->m_data[i] = airnode;
281 CavesV6::CavesV6(INodeDefManager *ndef, GenerateNotifier *gennotify,
282 int water_level, content_t water_source, content_t lava_source)
287 this->gennotify = gennotify;
288 this->water_level = water_level;
290 c_water_source = water_source;
291 if (c_water_source == CONTENT_IGNORE)
292 c_water_source = ndef->getId("mapgen_water_source");
293 if (c_water_source == CONTENT_IGNORE)
294 c_water_source = CONTENT_AIR;
296 c_lava_source = lava_source;
297 if (c_lava_source == CONTENT_IGNORE)
298 c_lava_source = ndef->getId("mapgen_lava_source");
299 if (c_lava_source == CONTENT_IGNORE)
300 c_lava_source = CONTENT_AIR;
304 void CavesV6::makeCave(MMVManip *vm, v3s16 nmin, v3s16 nmax,
305 PseudoRandom *ps, PseudoRandom *ps2,
306 bool is_large_cave, int max_stone_height, s16 *heightmap)
315 this->node_min = nmin;
316 this->node_max = nmax;
317 this->heightmap = heightmap;
318 this->large_cave = is_large_cave;
320 this->ystride = nmax.X - nmin.X + 1;
322 // Set initial parameters from randomness
323 min_tunnel_diameter = 2;
324 max_tunnel_diameter = ps->range(2, 6);
325 dswitchint = ps->range(1, 14);
327 part_max_length_rs = ps->range(2, 4);
328 tunnel_routepoints = ps->range(5, ps->range(15, 30));
329 min_tunnel_diameter = 5;
330 max_tunnel_diameter = ps->range(7, ps->range(8, 24));
332 part_max_length_rs = ps->range(2, 9);
333 tunnel_routepoints = ps->range(10, ps->range(15, 30));
335 large_cave_is_flat = (ps->range(0, 1) == 0);
337 main_direction = v3f(0, 0, 0);
339 // Allowed route area size in nodes
340 ar = node_max - node_min + v3s16(1, 1, 1);
341 // Area starting point in nodes
345 //(this should be more than the maximum radius of the tunnel)
346 const s16 max_spread_amount = MAP_BLOCKSIZE;
348 s16 more = MYMAX(max_spread_amount - max_tunnel_diameter / 2 - insure, 1);
349 ar += v3s16(1, 0, 1) * more * 2;
350 of -= v3s16(1, 0, 1) * more;
353 // Allow half a diameter + 7 over stone surface
354 route_y_max = -of.Y + max_stone_height + max_tunnel_diameter / 2 + 7;
356 // Limit maximum to area
357 route_y_max = rangelim(route_y_max, 0, ar.Y - 1);
361 if (node_min.Y < water_level && node_max.Y > water_level) {
362 minpos = water_level - max_tunnel_diameter / 3 - of.Y;
363 route_y_max = water_level + max_tunnel_diameter / 3 - of.Y;
365 route_y_min = ps->range(minpos, minpos + max_tunnel_diameter);
366 route_y_min = rangelim(route_y_min, 0, route_y_max);
369 s16 route_start_y_min = route_y_min;
370 s16 route_start_y_max = route_y_max;
372 route_start_y_min = rangelim(route_start_y_min, 0, ar.Y - 1);
373 route_start_y_max = rangelim(route_start_y_max, route_start_y_min, ar.Y - 1);
375 // Randomize starting position
377 (float)(ps->next() % ar.X) + 0.5,
378 (float)(ps->range(route_start_y_min, route_start_y_max)) + 0.5,
379 (float)(ps->next() % ar.Z) + 0.5
382 // Add generation notify begin event
383 if (gennotify != NULL) {
384 v3s16 abs_pos(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
385 GenNotifyType notifytype = large_cave ?
386 GENNOTIFY_LARGECAVE_BEGIN : GENNOTIFY_CAVE_BEGIN;
387 gennotify->addEvent(notifytype, abs_pos);
390 // Generate some tunnel starting from orp
391 for (u16 j = 0; j < tunnel_routepoints; j++)
392 makeTunnel(j % dswitchint == 0);
394 // Add generation notify end event
395 if (gennotify != NULL) {
396 v3s16 abs_pos = v3s16(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
397 GenNotifyType notifytype = large_cave ?
398 GENNOTIFY_LARGECAVE_END : GENNOTIFY_CAVE_END;
399 gennotify->addEvent(notifytype, abs_pos);
404 void CavesV6::makeTunnel(bool dirswitch)
406 if (dirswitch && !large_cave) {
407 main_direction = v3f(
408 ((float)(ps->next() % 20) - (float)10) / 10,
409 ((float)(ps->next() % 20) - (float)10) / 30,
410 ((float)(ps->next() % 20) - (float)10) / 10
412 main_direction *= (float)ps->range(0, 10) / 10;
416 s16 min_d = min_tunnel_diameter;
417 s16 max_d = max_tunnel_diameter;
418 rs = ps->range(min_d, max_d);
419 s16 rs_part_max_length_rs = rs * part_max_length_rs;
424 rs_part_max_length_rs,
425 rs_part_max_length_rs / 2,
426 rs_part_max_length_rs
430 rs_part_max_length_rs,
431 ps->range(1, rs_part_max_length_rs),
432 rs_part_max_length_rs
437 (float)(ps->next() % maxlen.X) - (float)maxlen.X / 2,
438 (float)(ps->next() % maxlen.Y) - (float)maxlen.Y / 2,
439 (float)(ps->next() % maxlen.Z) - (float)maxlen.Z / 2
442 // Jump downward sometimes
443 if (!large_cave && ps->range(0, 12) == 0) {
445 (float)(ps->next() % maxlen.X) - (float)maxlen.X / 2,
446 (float)(ps->next() % (maxlen.Y * 2)) - (float)maxlen.Y,
447 (float)(ps->next() % maxlen.Z) - (float)maxlen.Z / 2
451 // Do not make caves that are entirely above ground, to fix
452 // shadow bugs caused by overgenerated large caves.
453 // It is only necessary to check the startpoint and endpoint.
454 v3s16 orpi(orp.X, orp.Y, orp.Z);
455 v3s16 veci(vec.X, vec.Y, vec.Z);
459 v3s16 p1 = orpi + veci + of + rs / 2;
460 if (p1.Z >= node_min.Z && p1.Z <= node_max.Z &&
461 p1.X >= node_min.X && p1.X <= node_max.X) {
462 u32 index1 = (p1.Z - node_min.Z) * ystride +
464 h1 = heightmap[index1];
466 h1 = water_level; // If not in heightmap
469 v3s16 p2 = orpi + of + rs / 2;
470 if (p2.Z >= node_min.Z && p2.Z <= node_max.Z &&
471 p2.X >= node_min.X && p2.X <= node_max.X) {
472 u32 index2 = (p2.Z - node_min.Z) * ystride +
474 h2 = heightmap[index2];
479 // If startpoint and endpoint are above ground,
480 // disable placing of nodes in carveRoute while
481 // still running all pseudorandom calls to ensure
482 // caves consistent with existing worlds.
483 bool tunnel_above_ground = p1.Y > h1 && p2.Y > h2;
485 vec += main_direction;
490 else if (rp.X >= ar.X)
493 if (rp.Y < route_y_min)
495 else if (rp.Y >= route_y_max)
496 rp.Y = route_y_max - 1;
500 else if (rp.Z >= ar.Z)
505 float veclen = vec.getLength();
506 // As odd as it sounds, veclen is *exactly* 0.0 sometimes, causing a FPE
510 // Every second section is rough
511 bool randomize_xz = (ps2->range(1, 2) == 1);
514 for (float f = 0; f < 1.0; f += 1.0 / veclen)
515 carveRoute(vec, f, randomize_xz, tunnel_above_ground);
521 void CavesV6::carveRoute(v3f vec, float f, bool randomize_xz,
522 bool tunnel_above_ground)
524 MapNode airnode(CONTENT_AIR);
525 MapNode waternode(c_water_source);
526 MapNode lavanode(c_lava_source);
528 v3s16 startp(orp.X, orp.Y, orp.Z);
531 v3f fp = orp + vec * f;
532 fp.X += 0.1 * ps->range(-10, 10);
533 fp.Z += 0.1 * ps->range(-10, 10);
534 v3s16 cp(fp.X, fp.Y, fp.Z);
539 d0 += ps->range(-1, 1);
540 d1 += ps->range(-1, 1);
543 for (s16 z0 = d0; z0 <= d1; z0++) {
544 s16 si = rs / 2 - MYMAX(0, abs(z0) - rs / 7 - 1);
545 for (s16 x0 = -si - ps->range(0,1); x0 <= si - 1 + ps->range(0,1); x0++) {
546 if (tunnel_above_ground)
549 s16 maxabsxz = MYMAX(abs(x0), abs(z0));
550 s16 si2 = rs / 2 - MYMAX(0, maxabsxz - rs / 7 - 1);
551 for (s16 y0 = -si2; y0 <= si2; y0++) {
552 if (large_cave_is_flat) {
553 // Make large caves not so tall
554 if (rs > 7 && abs(y0) >= rs / 3)
558 v3s16 p(cp.X + x0, cp.Y + y0, cp.Z + z0);
561 if (vm->m_area.contains(p) == false)
564 u32 i = vm->m_area.index(p);
565 content_t c = vm->m_data[i].getContent();
566 if (!ndef->get(c).is_ground_content)
570 int full_ymin = node_min.Y - MAP_BLOCKSIZE;
571 int full_ymax = node_max.Y + MAP_BLOCKSIZE;
573 if (full_ymin < water_level && full_ymax > water_level) {
574 vm->m_data[i] = (p.Y <= water_level) ? waternode : airnode;
575 } else if (full_ymax < water_level) {
576 vm->m_data[i] = (p.Y < startp.Y - 2) ? lavanode : airnode;
578 vm->m_data[i] = airnode;
581 if (c == CONTENT_IGNORE || c == CONTENT_AIR)
584 vm->m_data[i] = airnode;
585 vm->m_flags[i] |= VMANIP_FLAG_CAVE;