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 p1 = v3s16(orp.X, orp.Y, orp.Z) + of + rs / 2;
151 v3s16 p2 = v3s16(vec.X, vec.Y, vec.Z) + p1;
152 if (isPosAboveSurface(p1) || isPosAboveSurface(p2))
155 vec += main_direction;
160 else if (rp.X >= ar.X)
163 if (rp.Y < route_y_min)
165 else if (rp.Y >= route_y_max)
166 rp.Y = route_y_max - 1;
170 else if (rp.Z >= ar.Z)
175 float veclen = vec.getLength();
179 // Every second section is rough
180 bool randomize_xz = (ps->range(1, 2) == 1);
183 for (float f = 0; f < 1.0; f += 1.0 / veclen)
184 carveRoute(vec, f, randomize_xz);
190 void CavesRandomWalk::carveRoute(v3f vec, float f, bool randomize_xz)
192 MapNode airnode(CONTENT_AIR);
193 MapNode waternode(c_water_source);
194 MapNode lavanode(c_lava_source);
196 v3s16 startp(orp.X, orp.Y, orp.Z);
199 float nval = NoisePerlin3D(np_caveliquids, startp.X,
200 startp.Y, startp.Z, mg->seed);
201 MapNode liquidnode = (nval < 0.40 && node_max.Y < lava_depth) ?
202 lavanode : waternode;
204 v3f fp = orp + vec * f;
205 fp.X += 0.1 * ps->range(-10, 10);
206 fp.Z += 0.1 * ps->range(-10, 10);
207 v3s16 cp(fp.X, fp.Y, fp.Z);
212 d0 += ps->range(-1, 1);
213 d1 += ps->range(-1, 1);
216 for (s16 z0 = d0; z0 <= d1; z0++) {
217 s16 si = rs / 2 - MYMAX(0, abs(z0) - rs / 7 - 1);
218 for (s16 x0 = -si - ps->range(0,1); x0 <= si - 1 + ps->range(0,1); x0++) {
219 s16 maxabsxz = MYMAX(abs(x0), abs(z0));
221 s16 si2 = rs / 2 - MYMAX(0, maxabsxz - rs / 7 - 1);
223 for (s16 y0 = -si2; y0 <= si2; y0++) {
224 if (large_cave_is_flat) {
225 // Make large caves not so tall
226 if (rs > 7 && abs(y0) >= rs / 3)
230 v3s16 p(cp.X + x0, cp.Y + y0, cp.Z + z0);
233 if (vm->m_area.contains(p) == false)
236 u32 i = vm->m_area.index(p);
237 content_t c = vm->m_data[i].getContent();
238 if (!ndef->get(c).is_ground_content)
241 int full_ymin = node_min.Y - MAP_BLOCKSIZE;
242 int full_ymax = node_max.Y + MAP_BLOCKSIZE;
244 if (flooded && full_ymin < water_level && full_ymax > water_level)
245 vm->m_data[i] = (p.Y <= water_level) ? waternode : airnode;
246 else if (flooded && full_ymax < water_level)
247 vm->m_data[i] = (p.Y < startp.Y - 4) ? liquidnode : airnode;
249 vm->m_data[i] = airnode;
256 inline bool CavesRandomWalk::isPosAboveSurface(v3s16 p)
258 if (heightmap != NULL &&
259 p.Z >= node_min.Z && p.Z <= node_max.Z &&
260 p.X >= node_min.X && p.X <= node_max.X) {
261 u32 index = (p.Z - node_min.Z) * ystride + (p.X - node_min.X);
262 if (heightmap[index] < p.Y)
264 } else if (p.Y > water_level) {
276 CavesV6::CavesV6(INodeDefManager *ndef, GenerateNotifier *gennotify,
277 int water_level, content_t water_source, content_t lava_source)
282 this->gennotify = gennotify;
283 this->water_level = water_level;
285 c_water_source = water_source;
286 if (c_water_source == CONTENT_IGNORE)
287 c_water_source = ndef->getId("mapgen_water_source");
288 if (c_water_source == CONTENT_IGNORE)
289 c_water_source = CONTENT_AIR;
291 c_lava_source = lava_source;
292 if (c_lava_source == CONTENT_IGNORE)
293 c_lava_source = ndef->getId("mapgen_lava_source");
294 if (c_lava_source == CONTENT_IGNORE)
295 c_lava_source = CONTENT_AIR;
299 void CavesV6::makeCave(MMVManip *vm, v3s16 nmin, v3s16 nmax,
300 PseudoRandom *ps, PseudoRandom *ps2,
301 bool is_large_cave, int max_stone_height, s16 *heightmap)
310 this->node_min = nmin;
311 this->node_max = nmax;
312 this->heightmap = heightmap;
313 this->large_cave = is_large_cave;
315 this->ystride = nmax.X - nmin.X + 1;
317 // Set initial parameters from randomness
318 min_tunnel_diameter = 2;
319 max_tunnel_diameter = ps->range(2, 6);
320 dswitchint = ps->range(1, 14);
322 part_max_length_rs = ps->range(2, 4);
323 tunnel_routepoints = ps->range(5, ps->range(15, 30));
324 min_tunnel_diameter = 5;
325 max_tunnel_diameter = ps->range(7, ps->range(8, 24));
327 part_max_length_rs = ps->range(2, 9);
328 tunnel_routepoints = ps->range(10, ps->range(15, 30));
330 large_cave_is_flat = (ps->range(0, 1) == 0);
332 main_direction = v3f(0, 0, 0);
334 // Allowed route area size in nodes
335 ar = node_max - node_min + v3s16(1, 1, 1);
336 // Area starting point in nodes
340 //(this should be more than the maximum radius of the tunnel)
341 const s16 max_spread_amount = MAP_BLOCKSIZE;
343 s16 more = MYMAX(max_spread_amount - max_tunnel_diameter / 2 - insure, 1);
344 ar += v3s16(1, 0, 1) * more * 2;
345 of -= v3s16(1, 0, 1) * more;
348 // Allow half a diameter + 7 over stone surface
349 route_y_max = -of.Y + max_stone_height + max_tunnel_diameter / 2 + 7;
351 // Limit maximum to area
352 route_y_max = rangelim(route_y_max, 0, ar.Y - 1);
356 if (node_min.Y < water_level && node_max.Y > water_level) {
357 minpos = water_level - max_tunnel_diameter / 3 - of.Y;
358 route_y_max = water_level + max_tunnel_diameter / 3 - of.Y;
360 route_y_min = ps->range(minpos, minpos + max_tunnel_diameter);
361 route_y_min = rangelim(route_y_min, 0, route_y_max);
364 s16 route_start_y_min = route_y_min;
365 s16 route_start_y_max = route_y_max;
367 route_start_y_min = rangelim(route_start_y_min, 0, ar.Y - 1);
368 route_start_y_max = rangelim(route_start_y_max, route_start_y_min, ar.Y - 1);
370 // Randomize starting position
372 (float)(ps->next() % ar.X) + 0.5,
373 (float)(ps->range(route_start_y_min, route_start_y_max)) + 0.5,
374 (float)(ps->next() % ar.Z) + 0.5
377 // Add generation notify begin event
378 if (gennotify != NULL) {
379 v3s16 abs_pos(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
380 GenNotifyType notifytype = large_cave ?
381 GENNOTIFY_LARGECAVE_BEGIN : GENNOTIFY_CAVE_BEGIN;
382 gennotify->addEvent(notifytype, abs_pos);
385 // Generate some tunnel starting from orp
386 for (u16 j = 0; j < tunnel_routepoints; j++)
387 makeTunnel(j % dswitchint == 0);
389 // Add generation notify end event
390 if (gennotify != NULL) {
391 v3s16 abs_pos = v3s16(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
392 GenNotifyType notifytype = large_cave ?
393 GENNOTIFY_LARGECAVE_END : GENNOTIFY_CAVE_END;
394 gennotify->addEvent(notifytype, abs_pos);
399 void CavesV6::makeTunnel(bool dirswitch)
401 if (dirswitch && !large_cave) {
402 main_direction = v3f(
403 ((float)(ps->next() % 20) - (float)10) / 10,
404 ((float)(ps->next() % 20) - (float)10) / 30,
405 ((float)(ps->next() % 20) - (float)10) / 10
407 main_direction *= (float)ps->range(0, 10) / 10;
411 s16 min_d = min_tunnel_diameter;
412 s16 max_d = max_tunnel_diameter;
413 rs = ps->range(min_d, max_d);
414 s16 rs_part_max_length_rs = rs * part_max_length_rs;
419 rs_part_max_length_rs,
420 rs_part_max_length_rs / 2,
421 rs_part_max_length_rs
425 rs_part_max_length_rs,
426 ps->range(1, rs_part_max_length_rs),
427 rs_part_max_length_rs
432 (float)(ps->next() % maxlen.X) - (float)maxlen.X / 2,
433 (float)(ps->next() % maxlen.Y) - (float)maxlen.Y / 2,
434 (float)(ps->next() % maxlen.Z) - (float)maxlen.Z / 2
437 // Jump downward sometimes
438 if (!large_cave && ps->range(0, 12) == 0) {
440 (float)(ps->next() % maxlen.X) - (float)maxlen.X / 2,
441 (float)(ps->next() % (maxlen.Y * 2)) - (float)maxlen.Y,
442 (float)(ps->next() % maxlen.Z) - (float)maxlen.Z / 2
446 // Do not make caves that are entirely above ground, to fix shadow bugs
447 // caused by overgenerated large caves.
448 // It is only necessary to check the startpoint and endpoint.
449 v3s16 p1 = v3s16(orp.X, orp.Y, orp.Z) + of + rs / 2;
450 v3s16 p2 = v3s16(vec.X, vec.Y, vec.Z) + p1;
452 // If startpoint and endpoint are above ground, disable placement of nodes
453 // in carveRoute while still running all PseudoRandom calls to ensure caves
454 // are consistent with existing worlds.
455 bool tunnel_above_ground =
456 p1.Y > getSurfaceFromHeightmap(p1) &&
457 p2.Y > getSurfaceFromHeightmap(p2);
459 vec += main_direction;
464 else if (rp.X >= ar.X)
467 if (rp.Y < route_y_min)
469 else if (rp.Y >= route_y_max)
470 rp.Y = route_y_max - 1;
474 else if (rp.Z >= ar.Z)
479 float veclen = vec.getLength();
480 // As odd as it sounds, veclen is *exactly* 0.0 sometimes, causing a FPE
484 // Every second section is rough
485 bool randomize_xz = (ps2->range(1, 2) == 1);
488 for (float f = 0; f < 1.0; f += 1.0 / veclen)
489 carveRoute(vec, f, randomize_xz, tunnel_above_ground);
495 void CavesV6::carveRoute(v3f vec, float f, bool randomize_xz,
496 bool tunnel_above_ground)
498 MapNode airnode(CONTENT_AIR);
499 MapNode waternode(c_water_source);
500 MapNode lavanode(c_lava_source);
502 v3s16 startp(orp.X, orp.Y, orp.Z);
505 v3f fp = orp + vec * f;
506 fp.X += 0.1 * ps->range(-10, 10);
507 fp.Z += 0.1 * ps->range(-10, 10);
508 v3s16 cp(fp.X, fp.Y, fp.Z);
513 d0 += ps->range(-1, 1);
514 d1 += ps->range(-1, 1);
517 for (s16 z0 = d0; z0 <= d1; z0++) {
518 s16 si = rs / 2 - MYMAX(0, abs(z0) - rs / 7 - 1);
519 for (s16 x0 = -si - ps->range(0,1); x0 <= si - 1 + ps->range(0,1); x0++) {
520 if (tunnel_above_ground)
523 s16 maxabsxz = MYMAX(abs(x0), abs(z0));
524 s16 si2 = rs / 2 - MYMAX(0, maxabsxz - rs / 7 - 1);
525 for (s16 y0 = -si2; y0 <= si2; y0++) {
526 if (large_cave_is_flat) {
527 // Make large caves not so tall
528 if (rs > 7 && abs(y0) >= rs / 3)
532 v3s16 p(cp.X + x0, cp.Y + y0, cp.Z + z0);
535 if (vm->m_area.contains(p) == false)
538 u32 i = vm->m_area.index(p);
539 content_t c = vm->m_data[i].getContent();
540 if (!ndef->get(c).is_ground_content)
544 int full_ymin = node_min.Y - MAP_BLOCKSIZE;
545 int full_ymax = node_max.Y + MAP_BLOCKSIZE;
547 if (full_ymin < water_level && full_ymax > water_level) {
548 vm->m_data[i] = (p.Y <= water_level) ? waternode : airnode;
549 } else if (full_ymax < water_level) {
550 vm->m_data[i] = (p.Y < startp.Y - 2) ? lavanode : airnode;
552 vm->m_data[i] = airnode;
555 if (c == CONTENT_IGNORE || c == CONTENT_AIR)
558 vm->m_data[i] = airnode;
559 vm->m_flags[i] |= VMANIP_FLAG_CAVE;
567 inline s16 CavesV6::getSurfaceFromHeightmap(v3s16 p)
569 if (heightmap != NULL &&
570 p.Z >= node_min.Z && p.Z <= node_max.Z &&
571 p.X >= node_min.X && p.X <= node_max.X) {
572 u32 index = (p.Z - node_min.Z) * ystride + (p.X - node_min.X);
573 return heightmap[index];