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(
35 INodeDefManager *ndef,
36 GenerateNotifier *gennotify,
39 content_t water_source,
40 content_t lava_source)
45 this->gennotify = gennotify;
47 this->water_level = water_level;
48 this->np_caveliquids = &nparams_caveliquids;
49 this->lava_depth = DEFAULT_LAVA_DEPTH;
51 c_water_source = water_source;
52 if (c_water_source == CONTENT_IGNORE)
53 c_water_source = ndef->getId("mapgen_water_source");
54 if (c_water_source == CONTENT_IGNORE)
55 c_water_source = CONTENT_AIR;
57 c_lava_source = lava_source;
58 if (c_lava_source == CONTENT_IGNORE)
59 c_lava_source = ndef->getId("mapgen_lava_source");
60 if (c_lava_source == CONTENT_IGNORE)
61 c_lava_source = CONTENT_AIR;
65 void CavesRandomWalk::makeCave(MMVManip *vm, v3s16 nmin, v3s16 nmax,
66 PseudoRandom *ps, bool is_large_cave, int max_stone_height, s16 *heightmap)
73 this->node_min = nmin;
74 this->node_max = nmax;
75 this->heightmap = heightmap;
76 this->large_cave = is_large_cave;
78 this->ystride = nmax.X - nmin.X + 1;
80 // Set initial parameters from randomness
81 int dswitchint = ps->range(1, 14);
82 flooded = ps->range(1, 2) == 2;
85 part_max_length_rs = ps->range(2, 4);
86 tunnel_routepoints = ps->range(5, ps->range(15, 30));
87 min_tunnel_diameter = 5;
88 max_tunnel_diameter = ps->range(7, ps->range(8, 24));
90 part_max_length_rs = ps->range(2, 9);
91 tunnel_routepoints = ps->range(10, ps->range(15, 30));
92 min_tunnel_diameter = 2;
93 max_tunnel_diameter = ps->range(2, 6);
96 large_cave_is_flat = (ps->range(0, 1) == 0);
98 main_direction = v3f(0, 0, 0);
100 // Allowed route area size in nodes
101 ar = node_max - node_min + v3s16(1, 1, 1);
102 // Area starting point in nodes
106 //(this should be more than the maximum radius of the tunnel)
107 const s16 insure = 10;
108 s16 more = MYMAX(MAP_BLOCKSIZE - max_tunnel_diameter / 2 - insure, 1);
109 ar += v3s16(1, 0, 1) * more * 2;
110 of -= v3s16(1, 0, 1) * more;
113 // Allow half a diameter + 7 over stone surface
114 route_y_max = -of.Y + max_stone_y + max_tunnel_diameter / 2 + 7;
116 // Limit maximum to area
117 route_y_max = rangelim(route_y_max, 0, ar.Y - 1);
121 if (node_min.Y < water_level && node_max.Y > water_level) {
122 minpos = water_level - max_tunnel_diameter / 3 - of.Y;
123 route_y_max = water_level + max_tunnel_diameter / 3 - of.Y;
125 route_y_min = ps->range(minpos, minpos + max_tunnel_diameter);
126 route_y_min = rangelim(route_y_min, 0, route_y_max);
129 s16 route_start_y_min = route_y_min;
130 s16 route_start_y_max = route_y_max;
132 route_start_y_min = rangelim(route_start_y_min, 0, ar.Y - 1);
133 route_start_y_max = rangelim(route_start_y_max, route_start_y_min, ar.Y - 1);
135 // Randomize starting position
136 orp.Z = (float)(ps->next() % ar.Z) + 0.5f;
137 orp.Y = (float)(ps->range(route_start_y_min, route_start_y_max)) + 0.5f;
138 orp.X = (float)(ps->next() % ar.X) + 0.5f;
140 // Add generation notify begin event
142 v3s16 abs_pos(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
143 GenNotifyType notifytype = large_cave ?
144 GENNOTIFY_LARGECAVE_BEGIN : GENNOTIFY_CAVE_BEGIN;
145 gennotify->addEvent(notifytype, abs_pos);
148 // Generate some tunnel starting from orp
149 for (u16 j = 0; j < tunnel_routepoints; j++)
150 makeTunnel(j % dswitchint == 0);
152 // Add generation notify end event
154 v3s16 abs_pos(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
155 GenNotifyType notifytype = large_cave ?
156 GENNOTIFY_LARGECAVE_END : GENNOTIFY_CAVE_END;
157 gennotify->addEvent(notifytype, abs_pos);
162 void CavesRandomWalk::makeTunnel(bool dirswitch)
164 if (dirswitch && !large_cave) {
165 main_direction.Z = ((float)(ps->next() % 20) - (float)10) / 10;
166 main_direction.Y = ((float)(ps->next() % 20) - (float)10) / 30;
167 main_direction.X = ((float)(ps->next() % 20) - (float)10) / 10;
169 main_direction *= (float)ps->range(0, 10) / 10;
173 s16 min_d = min_tunnel_diameter;
174 s16 max_d = max_tunnel_diameter;
175 rs = ps->range(min_d, max_d);
176 s16 rs_part_max_length_rs = rs * part_max_length_rs;
181 rs_part_max_length_rs,
182 rs_part_max_length_rs / 2,
183 rs_part_max_length_rs
187 rs_part_max_length_rs,
188 ps->range(1, rs_part_max_length_rs),
189 rs_part_max_length_rs
194 // Jump downward sometimes
195 if (!large_cave && ps->range(0, 12) == 0) {
196 vec.Z = (float)(ps->next() % (maxlen.Z * 1)) - (float)maxlen.Z / 2;
197 vec.Y = (float)(ps->next() % (maxlen.Y * 2)) - (float)maxlen.Y;
198 vec.X = (float)(ps->next() % (maxlen.X * 1)) - (float)maxlen.X / 2;
200 vec.Z = (float)(ps->next() % (maxlen.Z * 1)) - (float)maxlen.Z / 2;
201 vec.Y = (float)(ps->next() % (maxlen.Y * 1)) - (float)maxlen.Y / 2;
202 vec.X = (float)(ps->next() % (maxlen.X * 1)) - (float)maxlen.X / 2;
205 // Do not make caves that are above ground.
206 // It is only necessary to check the startpoint and endpoint.
207 v3s16 p1 = v3s16(orp.X, orp.Y, orp.Z) + of + rs / 2;
208 v3s16 p2 = v3s16(vec.X, vec.Y, vec.Z) + p1;
209 if (isPosAboveSurface(p1) || isPosAboveSurface(p2))
212 vec += main_direction;
217 else if (rp.X >= ar.X)
220 if (rp.Y < route_y_min)
222 else if (rp.Y >= route_y_max)
223 rp.Y = route_y_max - 1;
227 else if (rp.Z >= ar.Z)
232 float veclen = vec.getLength();
236 // Every second section is rough
237 bool randomize_xz = (ps->range(1, 2) == 1);
240 for (float f = 0.f; f < 1.0f; f += 1.0f / veclen)
241 carveRoute(vec, f, randomize_xz);
247 void CavesRandomWalk::carveRoute(v3f vec, float f, bool randomize_xz)
249 MapNode airnode(CONTENT_AIR);
250 MapNode waternode(c_water_source);
251 MapNode lavanode(c_lava_source);
253 v3s16 startp(orp.X, orp.Y, orp.Z);
256 float nval = NoisePerlin3D(np_caveliquids, startp.X,
257 startp.Y, startp.Z, seed);
258 MapNode liquidnode = (nval < 0.40f && node_max.Y < lava_depth) ?
259 lavanode : waternode;
261 v3f fp = orp + vec * f;
262 fp.X += 0.1f * ps->range(-10, 10);
263 fp.Z += 0.1f * ps->range(-10, 10);
264 v3s16 cp(fp.X, fp.Y, fp.Z);
269 d0 += ps->range(-1, 1);
270 d1 += ps->range(-1, 1);
273 bool flat_cave_floor = !large_cave && ps->range(0, 2) == 2;
275 for (s16 z0 = d0; z0 <= d1; z0++) {
276 s16 si = rs / 2 - MYMAX(0, abs(z0) - rs / 7 - 1);
277 for (s16 x0 = -si - ps->range(0,1); x0 <= si - 1 + ps->range(0,1); x0++) {
278 s16 maxabsxz = MYMAX(abs(x0), abs(z0));
280 s16 si2 = rs / 2 - MYMAX(0, maxabsxz - rs / 7 - 1);
282 for (s16 y0 = -si2; y0 <= si2; y0++) {
283 // Make better floors in small caves
284 if (flat_cave_floor && y0 <= -rs / 2 && rs <= 7)
287 if (large_cave_is_flat) {
288 // Make large caves not so tall
289 if (rs > 7 && abs(y0) >= rs / 3)
293 v3s16 p(cp.X + x0, cp.Y + y0, cp.Z + z0);
296 if (vm->m_area.contains(p) == false)
299 u32 i = vm->m_area.index(p);
300 content_t c = vm->m_data[i].getContent();
301 if (!ndef->get(c).is_ground_content)
305 int full_ymin = node_min.Y - MAP_BLOCKSIZE;
306 int full_ymax = node_max.Y + MAP_BLOCKSIZE;
308 if (flooded && full_ymin < water_level && full_ymax > water_level)
309 vm->m_data[i] = (p.Y <= water_level) ? waternode : airnode;
310 else if (flooded && full_ymax < water_level)
311 vm->m_data[i] = (p.Y < startp.Y - 4) ? liquidnode : airnode;
313 vm->m_data[i] = airnode;
315 if (c == CONTENT_IGNORE)
318 vm->m_data[i] = airnode;
319 vm->m_flags[i] |= VMANIP_FLAG_CAVE;
327 inline bool CavesRandomWalk::isPosAboveSurface(v3s16 p)
329 if (heightmap != NULL &&
330 p.Z >= node_min.Z && p.Z <= node_max.Z &&
331 p.X >= node_min.X && p.X <= node_max.X) {
332 u32 index = (p.Z - node_min.Z) * ystride + (p.X - node_min.X);
333 if (heightmap[index] < p.Y)
335 } else if (p.Y > water_level) {
347 CavesV6::CavesV6(INodeDefManager *ndef, GenerateNotifier *gennotify,
348 int water_level, content_t water_source, content_t lava_source)
353 this->gennotify = gennotify;
354 this->water_level = water_level;
356 c_water_source = water_source;
357 if (c_water_source == CONTENT_IGNORE)
358 c_water_source = ndef->getId("mapgen_water_source");
359 if (c_water_source == CONTENT_IGNORE)
360 c_water_source = CONTENT_AIR;
362 c_lava_source = lava_source;
363 if (c_lava_source == CONTENT_IGNORE)
364 c_lava_source = ndef->getId("mapgen_lava_source");
365 if (c_lava_source == CONTENT_IGNORE)
366 c_lava_source = CONTENT_AIR;
370 void CavesV6::makeCave(MMVManip *vm, v3s16 nmin, v3s16 nmax,
371 PseudoRandom *ps, PseudoRandom *ps2,
372 bool is_large_cave, int max_stone_height, s16 *heightmap)
381 this->node_min = nmin;
382 this->node_max = nmax;
383 this->heightmap = heightmap;
384 this->large_cave = is_large_cave;
386 this->ystride = nmax.X - nmin.X + 1;
388 // Set initial parameters from randomness
389 min_tunnel_diameter = 2;
390 max_tunnel_diameter = ps->range(2, 6);
391 int dswitchint = ps->range(1, 14);
393 part_max_length_rs = ps->range(2, 4);
394 tunnel_routepoints = ps->range(5, ps->range(15, 30));
395 min_tunnel_diameter = 5;
396 max_tunnel_diameter = ps->range(7, ps->range(8, 24));
398 part_max_length_rs = ps->range(2, 9);
399 tunnel_routepoints = ps->range(10, ps->range(15, 30));
401 large_cave_is_flat = (ps->range(0, 1) == 0);
403 main_direction = v3f(0, 0, 0);
405 // Allowed route area size in nodes
406 ar = node_max - node_min + v3s16(1, 1, 1);
407 // Area starting point in nodes
411 //(this should be more than the maximum radius of the tunnel)
412 const s16 max_spread_amount = MAP_BLOCKSIZE;
413 const s16 insure = 10;
414 s16 more = MYMAX(max_spread_amount - max_tunnel_diameter / 2 - insure, 1);
415 ar += v3s16(1, 0, 1) * more * 2;
416 of -= v3s16(1, 0, 1) * more;
419 // Allow half a diameter + 7 over stone surface
420 route_y_max = -of.Y + max_stone_height + max_tunnel_diameter / 2 + 7;
422 // Limit maximum to area
423 route_y_max = rangelim(route_y_max, 0, ar.Y - 1);
427 if (node_min.Y < water_level && node_max.Y > water_level) {
428 minpos = water_level - max_tunnel_diameter / 3 - of.Y;
429 route_y_max = water_level + max_tunnel_diameter / 3 - of.Y;
431 route_y_min = ps->range(minpos, minpos + max_tunnel_diameter);
432 route_y_min = rangelim(route_y_min, 0, route_y_max);
435 s16 route_start_y_min = route_y_min;
436 s16 route_start_y_max = route_y_max;
438 route_start_y_min = rangelim(route_start_y_min, 0, ar.Y - 1);
439 route_start_y_max = rangelim(route_start_y_max, route_start_y_min, ar.Y - 1);
441 // Randomize starting position
442 orp.Z = (float)(ps->next() % ar.Z) + 0.5f;
443 orp.Y = (float)(ps->range(route_start_y_min, route_start_y_max)) + 0.5f;
444 orp.X = (float)(ps->next() % ar.X) + 0.5f;
446 // Add generation notify begin event
447 if (gennotify != NULL) {
448 v3s16 abs_pos(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
449 GenNotifyType notifytype = large_cave ?
450 GENNOTIFY_LARGECAVE_BEGIN : GENNOTIFY_CAVE_BEGIN;
451 gennotify->addEvent(notifytype, abs_pos);
454 // Generate some tunnel starting from orp
455 for (u16 j = 0; j < tunnel_routepoints; j++)
456 makeTunnel(j % dswitchint == 0);
458 // Add generation notify end event
459 if (gennotify != NULL) {
460 v3s16 abs_pos(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
461 GenNotifyType notifytype = large_cave ?
462 GENNOTIFY_LARGECAVE_END : GENNOTIFY_CAVE_END;
463 gennotify->addEvent(notifytype, abs_pos);
468 void CavesV6::makeTunnel(bool dirswitch)
470 if (dirswitch && !large_cave) {
471 main_direction.Z = ((float)(ps->next() % 20) - (float)10) / 10;
472 main_direction.Y = ((float)(ps->next() % 20) - (float)10) / 30;
473 main_direction.X = ((float)(ps->next() % 20) - (float)10) / 10;
475 main_direction *= (float)ps->range(0, 10) / 10;
479 s16 min_d = min_tunnel_diameter;
480 s16 max_d = max_tunnel_diameter;
481 rs = ps->range(min_d, max_d);
482 s16 rs_part_max_length_rs = rs * part_max_length_rs;
487 rs_part_max_length_rs,
488 rs_part_max_length_rs / 2,
489 rs_part_max_length_rs
493 rs_part_max_length_rs,
494 ps->range(1, rs_part_max_length_rs),
495 rs_part_max_length_rs
500 vec.Z = (float)(ps->next() % maxlen.Z) - (float)maxlen.Z / 2;
501 vec.Y = (float)(ps->next() % maxlen.Y) - (float)maxlen.Y / 2;
502 vec.X = (float)(ps->next() % maxlen.X) - (float)maxlen.X / 2;
504 // Jump downward sometimes
505 if (!large_cave && ps->range(0, 12) == 0) {
506 vec.Z = (float)(ps->next() % maxlen.Z) - (float)maxlen.Z / 2;
507 vec.Y = (float)(ps->next() % (maxlen.Y * 2)) - (float)maxlen.Y;
508 vec.X = (float)(ps->next() % maxlen.X) - (float)maxlen.X / 2;
511 // Do not make caves that are entirely above ground, to fix shadow bugs
512 // caused by overgenerated large caves.
513 // It is only necessary to check the startpoint and endpoint.
514 v3s16 p1 = v3s16(orp.X, orp.Y, orp.Z) + of + rs / 2;
515 v3s16 p2 = v3s16(vec.X, vec.Y, vec.Z) + p1;
517 // If startpoint and endpoint are above ground, disable placement of nodes
518 // in carveRoute while still running all PseudoRandom calls to ensure caves
519 // are consistent with existing worlds.
520 bool tunnel_above_ground =
521 p1.Y > getSurfaceFromHeightmap(p1) &&
522 p2.Y > getSurfaceFromHeightmap(p2);
524 vec += main_direction;
529 else if (rp.X >= ar.X)
532 if (rp.Y < route_y_min)
534 else if (rp.Y >= route_y_max)
535 rp.Y = route_y_max - 1;
539 else if (rp.Z >= ar.Z)
544 float veclen = vec.getLength();
545 // As odd as it sounds, veclen is *exactly* 0.0 sometimes, causing a FPE
549 // Every second section is rough
550 bool randomize_xz = (ps2->range(1, 2) == 1);
553 for (float f = 0.f; f < 1.0f; f += 1.0f / veclen)
554 carveRoute(vec, f, randomize_xz, tunnel_above_ground);
560 void CavesV6::carveRoute(v3f vec, float f, bool randomize_xz,
561 bool tunnel_above_ground)
563 MapNode airnode(CONTENT_AIR);
564 MapNode waternode(c_water_source);
565 MapNode lavanode(c_lava_source);
567 v3s16 startp(orp.X, orp.Y, orp.Z);
570 v3f fp = orp + vec * f;
571 fp.X += 0.1f * ps->range(-10, 10);
572 fp.Z += 0.1f * ps->range(-10, 10);
573 v3s16 cp(fp.X, fp.Y, fp.Z);
578 d0 += ps->range(-1, 1);
579 d1 += ps->range(-1, 1);
582 for (s16 z0 = d0; z0 <= d1; z0++) {
583 s16 si = rs / 2 - MYMAX(0, abs(z0) - rs / 7 - 1);
584 for (s16 x0 = -si - ps->range(0,1); x0 <= si - 1 + ps->range(0,1); x0++) {
585 if (tunnel_above_ground)
588 s16 maxabsxz = MYMAX(abs(x0), abs(z0));
589 s16 si2 = rs / 2 - MYMAX(0, maxabsxz - rs / 7 - 1);
590 for (s16 y0 = -si2; y0 <= si2; y0++) {
591 if (large_cave_is_flat) {
592 // Make large caves not so tall
593 if (rs > 7 && abs(y0) >= rs / 3)
597 v3s16 p(cp.X + x0, cp.Y + y0, cp.Z + z0);
600 if (vm->m_area.contains(p) == false)
603 u32 i = vm->m_area.index(p);
604 content_t c = vm->m_data[i].getContent();
605 if (!ndef->get(c).is_ground_content)
609 int full_ymin = node_min.Y - MAP_BLOCKSIZE;
610 int full_ymax = node_max.Y + MAP_BLOCKSIZE;
612 if (full_ymin < water_level && full_ymax > water_level) {
613 vm->m_data[i] = (p.Y <= water_level) ? waternode : airnode;
614 } else if (full_ymax < water_level) {
615 vm->m_data[i] = (p.Y < startp.Y - 2) ? lavanode : airnode;
617 vm->m_data[i] = airnode;
620 if (c == CONTENT_IGNORE || c == CONTENT_AIR)
623 vm->m_data[i] = airnode;
624 vm->m_flags[i] |= VMANIP_FLAG_CAVE;
632 inline s16 CavesV6::getSurfaceFromHeightmap(v3s16 p)
634 if (heightmap != NULL &&
635 p.Z >= node_min.Z && p.Z <= node_max.Z &&
636 p.X >= node_min.X && p.X <= node_max.X) {
637 u32 index = (p.Z - node_min.Z) * ystride + (p.X - node_min.X);
638 return heightmap[index];