3 Copyright (C) 2015-2017 paramat
4 Copyright (C) 2015-2016 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License along
17 with this program; if not, write to the Free Software Foundation, Inc.,
18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
28 #include "content_sao.h"
30 #include "voxelalgorithms.h"
31 //#include "profiler.h" // For TimeTaker
32 #include "settings.h" // For g_settings
34 #include "dungeongen.h"
38 #include "mg_decoration.h"
39 #include "mapgen_fractal.h"
42 FlagDesc flagdesc_mapgen_fractal[] = {
46 ///////////////////////////////////////////////////////////////////////////////////////
49 MapgenFractal::MapgenFractal(int mapgenid, MapgenFractalParams *params, EmergeManager *emerge)
50 : MapgenBasic(mapgenid, params, emerge)
52 spflags = params->spflags;
53 cave_width = params->cave_width;
54 large_cave_depth = params->large_cave_depth;
55 lava_depth = params->lava_depth;
56 fractal = params->fractal;
57 iterations = params->iterations;
58 scale = params->scale;
59 offset = params->offset;
60 slice_w = params->slice_w;
61 julia_x = params->julia_x;
62 julia_y = params->julia_y;
63 julia_z = params->julia_z;
64 julia_w = params->julia_w;
67 noise_seabed = new Noise(¶ms->np_seabed, seed, csize.X, csize.Z);
68 noise_filler_depth = new Noise(¶ms->np_filler_depth, seed, csize.X, csize.Z);
70 MapgenBasic::np_cave1 = params->np_cave1;
71 MapgenBasic::np_cave2 = params->np_cave2;
73 formula = fractal / 2 + fractal % 2;
74 julia = fractal % 2 == 0;
78 MapgenFractal::~MapgenFractal()
81 delete noise_filler_depth;
85 MapgenFractalParams::MapgenFractalParams():
86 np_seabed (-14, 9, v3f(600, 600, 600), 41900, 5, 0.6, 2.0),
87 np_filler_depth (0, 1.2, v3f(150, 150, 150), 261, 3, 0.7, 2.0),
88 np_cave1 (0, 12, v3f(61, 61, 61), 52534, 3, 0.5, 2.0),
89 np_cave2 (0, 12, v3f(67, 67, 67), 10325, 3, 0.5, 2.0)
94 void MapgenFractalParams::readParams(const Settings *settings)
96 settings->getFlagStrNoEx("mgfractal_spflags", spflags, flagdesc_mapgen_fractal);
97 settings->getFloatNoEx("mgfractal_cave_width", cave_width);
98 settings->getS16NoEx("mgfractal_large_cave_depth", large_cave_depth);
99 settings->getS16NoEx("mgfractal_lava_depth", lava_depth);
100 settings->getU16NoEx("mgfractal_fractal", fractal);
101 settings->getU16NoEx("mgfractal_iterations", iterations);
102 settings->getV3FNoEx("mgfractal_scale", scale);
103 settings->getV3FNoEx("mgfractal_offset", offset);
104 settings->getFloatNoEx("mgfractal_slice_w", slice_w);
105 settings->getFloatNoEx("mgfractal_julia_x", julia_x);
106 settings->getFloatNoEx("mgfractal_julia_y", julia_y);
107 settings->getFloatNoEx("mgfractal_julia_z", julia_z);
108 settings->getFloatNoEx("mgfractal_julia_w", julia_w);
110 settings->getNoiseParams("mgfractal_np_seabed", np_seabed);
111 settings->getNoiseParams("mgfractal_np_filler_depth", np_filler_depth);
112 settings->getNoiseParams("mgfractal_np_cave1", np_cave1);
113 settings->getNoiseParams("mgfractal_np_cave2", np_cave2);
117 void MapgenFractalParams::writeParams(Settings *settings) const
119 settings->setFlagStr("mgfractal_spflags", spflags, flagdesc_mapgen_fractal, U32_MAX);
120 settings->setFloat("mgfractal_cave_width", cave_width);
121 settings->setS16("mgfractal_large_cave_depth", large_cave_depth);
122 settings->setS16("mgfractal_lava_depth", lava_depth);
123 settings->setU16("mgfractal_fractal", fractal);
124 settings->setU16("mgfractal_iterations", iterations);
125 settings->setV3F("mgfractal_scale", scale);
126 settings->setV3F("mgfractal_offset", offset);
127 settings->setFloat("mgfractal_slice_w", slice_w);
128 settings->setFloat("mgfractal_julia_x", julia_x);
129 settings->setFloat("mgfractal_julia_y", julia_y);
130 settings->setFloat("mgfractal_julia_z", julia_z);
131 settings->setFloat("mgfractal_julia_w", julia_w);
133 settings->setNoiseParams("mgfractal_np_seabed", np_seabed);
134 settings->setNoiseParams("mgfractal_np_filler_depth", np_filler_depth);
135 settings->setNoiseParams("mgfractal_np_cave1", np_cave1);
136 settings->setNoiseParams("mgfractal_np_cave2", np_cave2);
140 /////////////////////////////////////////////////////////////////
143 int MapgenFractal::getSpawnLevelAtPoint(v2s16 p)
145 bool solid_below = false; // Dry solid node is present below to spawn on
146 u8 air_count = 0; // Consecutive air nodes above the dry solid node
147 s16 seabed_level = NoisePerlin2D(&noise_seabed->np, p.X, p.Y, seed);
148 // Seabed can rise above water_level or might be raised to create dry land
149 s16 search_start = MYMAX(seabed_level, water_level + 1);
150 if (seabed_level > water_level)
153 for (s16 y = search_start; y <= search_start + 128; y++) {
154 if (getFractalAtPoint(p.X, y, p.Y)) { // Fractal node
157 } else if (solid_below) { // Air above solid node
159 // 3 to account for snowblock dust
165 return MAX_MAP_GENERATION_LIMIT; // Unsuitable spawn point
169 void MapgenFractal::makeChunk(BlockMakeData *data)
172 assert(data->vmanip);
173 assert(data->nodedef);
174 assert(data->blockpos_requested.X >= data->blockpos_min.X &&
175 data->blockpos_requested.Y >= data->blockpos_min.Y &&
176 data->blockpos_requested.Z >= data->blockpos_min.Z);
177 assert(data->blockpos_requested.X <= data->blockpos_max.X &&
178 data->blockpos_requested.Y <= data->blockpos_max.Y &&
179 data->blockpos_requested.Z <= data->blockpos_max.Z);
181 this->generating = true;
182 this->vm = data->vmanip;
183 this->ndef = data->nodedef;
184 //TimeTaker t("makeChunk");
186 v3s16 blockpos_min = data->blockpos_min;
187 v3s16 blockpos_max = data->blockpos_max;
188 node_min = blockpos_min * MAP_BLOCKSIZE;
189 node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
190 full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
191 full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
193 blockseed = getBlockSeed2(full_node_min, seed);
195 // Generate base terrain, mountains, and ridges with initial heightmaps
196 s16 stone_surface_max_y = generateTerrain();
199 updateHeightmap(node_min, node_max);
201 // Init biome generator, place biome-specific nodes, and build biomemap
202 biomegen->calcBiomeNoise(node_min);
204 MgStoneType mgstone_type;
205 content_t biome_stone;
206 generateBiomes(&mgstone_type, &biome_stone);
208 if (flags & MG_CAVES)
209 generateCaves(stone_surface_max_y, large_cave_depth);
211 if (flags & MG_DUNGEONS)
212 generateDungeons(stone_surface_max_y, mgstone_type, biome_stone);
214 // Generate the registered decorations
215 if (flags & MG_DECORATIONS)
216 m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
218 // Generate the registered ores
219 m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
221 // Sprinkle some dust on top after everything else was generated
224 //printf("makeChunk: %dms\n", t.stop());
226 updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
228 if (flags & MG_LIGHT)
229 calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
230 full_node_min, full_node_max);
232 //setLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
233 // node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE, 0xFF);
235 this->generating = false;
239 bool MapgenFractal::getFractalAtPoint(s16 x, s16 y, s16 z)
241 float cx, cy, cz, cw, ox, oy, oz, ow;
243 if (julia) { // Julia set
248 ox = (float)x / scale.X - offset.X;
249 oy = (float)y / scale.Y - offset.Y;
250 oz = (float)z / scale.Z - offset.Z;
252 } else { // Mandelbrot set
253 cx = (float)x / scale.X - offset.X;
254 cy = (float)y / scale.Y - offset.Y;
255 cz = (float)z / scale.Z - offset.Z;
268 for (u16 iter = 0; iter < iterations; iter++) {
271 case 1: // 4D "Roundy"
272 nx = ox * ox - oy * oy - oz * oz - ow * ow + cx;
273 ny = 2.0f * (ox * oy + oz * ow) + cy;
274 nz = 2.0f * (ox * oz + oy * ow) + cz;
275 nw = 2.0f * (ox * ow + oy * oz) + cw;
277 case 2: // 4D "Squarry"
278 nx = ox * ox - oy * oy - oz * oz - ow * ow + cx;
279 ny = 2.0f * (ox * oy + oz * ow) + cy;
280 nz = 2.0f * (ox * oz + oy * ow) + cz;
281 nw = 2.0f * (ox * ow - oy * oz) + cw;
283 case 3: // 4D "Mandy Cousin"
284 nx = ox * ox - oy * oy - oz * oz + ow * ow + cx;
285 ny = 2.0f * (ox * oy + oz * ow) + cy;
286 nz = 2.0f * (ox * oz + oy * ow) + cz;
287 nw = 2.0f * (ox * ow + oy * oz) + cw;
289 case 4: // 4D "Variation"
290 nx = ox * ox - oy * oy - oz * oz - ow * ow + cx;
291 ny = 2.0f * (ox * oy + oz * ow) + cy;
292 nz = 2.0f * (ox * oz - oy * ow) + cz;
293 nw = 2.0f * (ox * ow + oy * oz) + cw;
295 case 5: // 3D "Mandelbrot/Mandelbar"
296 nx = ox * ox - oy * oy - oz * oz + cx;
297 ny = 2.0f * ox * oy + cy;
298 nz = -2.0f * ox * oz + cz;
300 case 6: // 3D "Christmas Tree"
301 // Altering the formula here is necessary to avoid division by zero
302 if (fabs(oz) < 0.000000001f) {
303 nx = ox * ox - oy * oy - oz * oz + cx;
304 ny = 2.0f * oy * ox + cy;
305 nz = 4.0f * oz * ox + cz;
307 float a = (2.0f * ox) / (sqrt(oy * oy + oz * oz));
308 nx = ox * ox - oy * oy - oz * oz + cx;
309 ny = a * (oy * oy - oz * oz) + cy;
310 nz = a * 2.0f * oy * oz + cz;
313 case 7: // 3D "Mandelbulb"
314 if (fabs(oy) < 0.000000001f) {
315 nx = ox * ox - oz * oz + cx;
317 nz = -2.0f * oz * sqrt(ox * ox) + cz;
319 float a = 1.0f - (oz * oz) / (ox * ox + oy * oy);
320 nx = (ox * ox - oy * oy) * a + cx;
321 ny = 2.0f * ox * oy * a + cy;
322 nz = -2.0f * oz * sqrt(ox * ox + oy * oy) + cz;
325 case 8: // 3D "Cosine Mandelbulb"
326 if (fabs(oy) < 0.000000001f) {
327 nx = 2.0f * ox * oz + cx;
328 ny = 4.0f * oy * oz + cy;
329 nz = oz * oz - ox * ox - oy * oy + cz;
331 float a = (2.0f * oz) / sqrt(ox * ox + oy * oy);
332 nx = (ox * ox - oy * oy) * a + cx;
333 ny = 2.0f * ox * oy * a + cy;
334 nz = oz * oz - ox * ox - oy * oy + cz;
337 case 9: // 4D "Mandelbulb"
338 float rxy = sqrt(ox * ox + oy * oy);
339 float rxyz = sqrt(ox * ox + oy * oy + oz * oz);
340 if (fabs(ow) < 0.000000001f && fabs(oz) < 0.000000001f) {
341 nx = (ox * ox - oy * oy) + cx;
342 ny = 2.0f * ox * oy + cy;
343 nz = -2.0f * rxy * oz + cz;
344 nw = 2.0f * rxyz * ow + cw;
346 float a = 1.0f - (ow * ow) / (rxyz * rxyz);
347 float b = a * (1.0f - (oz * oz) / (rxy * rxy));
348 nx = (ox * ox - oy * oy) * b + cx;
349 ny = 2.0f * ox * oy * b + cy;
350 nz = -2.0f * rxy * oz * a + cz;
351 nw = 2.0f * rxyz * ow + cw;
356 if (nx * nx + ny * ny + nz * nz + nw * nw > 4.0f)
369 s16 MapgenFractal::generateTerrain()
371 MapNode n_air(CONTENT_AIR);
372 MapNode n_stone(c_stone);
373 MapNode n_water(c_water_source);
375 s16 stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
378 noise_seabed->perlinMap2D(node_min.X, node_min.Z);
380 for (s16 z = node_min.Z; z <= node_max.Z; z++) {
381 for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
382 u32 vi = vm->m_area.index(node_min.X, y, z);
383 for (s16 x = node_min.X; x <= node_max.X; x++, vi++, index2d++) {
384 if (vm->m_data[vi].getContent() == CONTENT_IGNORE) {
385 s16 seabed_height = noise_seabed->result[index2d];
387 if (y <= seabed_height || getFractalAtPoint(x, y, z)) {
388 vm->m_data[vi] = n_stone;
389 if (y > stone_surface_max_y)
390 stone_surface_max_y = y;
391 } else if (y <= water_level) {
392 vm->m_data[vi] = n_water;
394 vm->m_data[vi] = n_air;
403 return stone_surface_max_y;