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- /*
- Minetest
- Copyright (C) 2010-2015 celeron55, Perttu Ahola <celeron55@gmail.com>
- Copyright (C) 2013-2016 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
- Copyright (C) 2015-2017 paramat
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
- #include "mapgen.h"
- #include "voxel.h"
- #include "noise.h"
- #include "gamedef.h"
- #include "mg_biome.h"
- #include "mapblock.h"
- #include "mapnode.h"
- #include "map.h"
- #include "content_sao.h"
- #include "nodedef.h"
- #include "emerge.h"
- #include "voxelalgorithms.h"
- #include "porting.h"
- #include "profiler.h"
- #include "settings.h"
- #include "treegen.h"
- #include "serialization.h"
- #include "util/serialize.h"
- #include "util/numeric.h"
- #include "filesys.h"
- #include "log.h"
- #include "mapgen_flat.h"
- #include "mapgen_fractal.h"
- #include "mapgen_v5.h"
- #include "mapgen_v6.h"
- #include "mapgen_v7.h"
- #include "mapgen_valleys.h"
- #include "mapgen_singlenode.h"
- #include "cavegen.h"
- #include "dungeongen.h"
- FlagDesc flagdesc_mapgen[] = {
- {"caves", MG_CAVES},
- {"dungeons", MG_DUNGEONS},
- {"light", MG_LIGHT},
- {"decorations", MG_DECORATIONS},
- {NULL, 0}
- };
- FlagDesc flagdesc_gennotify[] = {
- {"dungeon", 1 << GENNOTIFY_DUNGEON},
- {"temple", 1 << GENNOTIFY_TEMPLE},
- {"cave_begin", 1 << GENNOTIFY_CAVE_BEGIN},
- {"cave_end", 1 << GENNOTIFY_CAVE_END},
- {"large_cave_begin", 1 << GENNOTIFY_LARGECAVE_BEGIN},
- {"large_cave_end", 1 << GENNOTIFY_LARGECAVE_END},
- {"decoration", 1 << GENNOTIFY_DECORATION},
- {NULL, 0}
- };
- struct MapgenDesc {
- const char *name;
- bool is_user_visible;
- };
- ////
- //// Built-in mapgens
- ////
- static MapgenDesc g_reg_mapgens[] = {
- {"v5", true},
- {"v6", true},
- {"v7", true},
- {"flat", true},
- {"fractal", true},
- {"valleys", true},
- {"singlenode", true},
- };
- STATIC_ASSERT(
- ARRLEN(g_reg_mapgens) == MAPGEN_INVALID,
- registered_mapgens_is_wrong_size);
- ////
- //// Mapgen
- ////
- Mapgen::Mapgen()
- {
- }
- Mapgen::Mapgen(int mapgenid, MapgenParams *params, EmergeManager *emerge) :
- gennotify(emerge->gen_notify_on, &emerge->gen_notify_on_deco_ids)
- {
- id = mapgenid;
- water_level = params->water_level;
- mapgen_limit = params->mapgen_limit;
- flags = params->flags;
- csize = v3s16(1, 1, 1) * (params->chunksize * MAP_BLOCKSIZE);
- /*
- We are losing half our entropy by doing this, but it is necessary to
- preserve reverse compatibility. If the top half of our current 64 bit
- seeds ever starts getting used, existing worlds will break due to a
- different hash outcome and no way to differentiate between versions.
- A solution could be to add a new bit to designate that the top half of
- the seed value should be used, essentially a 1-bit version code, but
- this would require increasing the total size of a seed to 9 bytes (yuck)
- It's probably okay if this never gets fixed. 4.2 billion possibilities
- ought to be enough for anyone.
- */
- seed = (s32)params->seed;
- ndef = emerge->ndef;
- }
- Mapgen::~Mapgen()
- {
- }
- MapgenType Mapgen::getMapgenType(const std::string &mgname)
- {
- for (size_t i = 0; i != ARRLEN(g_reg_mapgens); i++) {
- if (mgname == g_reg_mapgens[i].name)
- return (MapgenType)i;
- }
- return MAPGEN_INVALID;
- }
- const char *Mapgen::getMapgenName(MapgenType mgtype)
- {
- size_t index = (size_t)mgtype;
- if (index == MAPGEN_INVALID || index >= ARRLEN(g_reg_mapgens))
- return "invalid";
- return g_reg_mapgens[index].name;
- }
- Mapgen *Mapgen::createMapgen(MapgenType mgtype, int mgid,
- MapgenParams *params, EmergeManager *emerge)
- {
- switch (mgtype) {
- case MAPGEN_FLAT:
- return new MapgenFlat(mgid, (MapgenFlatParams *)params, emerge);
- case MAPGEN_FRACTAL:
- return new MapgenFractal(mgid, (MapgenFractalParams *)params, emerge);
- case MAPGEN_SINGLENODE:
- return new MapgenSinglenode(mgid, (MapgenSinglenodeParams *)params, emerge);
- case MAPGEN_V5:
- return new MapgenV5(mgid, (MapgenV5Params *)params, emerge);
- case MAPGEN_V6:
- return new MapgenV6(mgid, (MapgenV6Params *)params, emerge);
- case MAPGEN_V7:
- return new MapgenV7(mgid, (MapgenV7Params *)params, emerge);
- case MAPGEN_VALLEYS:
- return new MapgenValleys(mgid, (MapgenValleysParams *)params, emerge);
- default:
- return NULL;
- }
- }
- MapgenParams *Mapgen::createMapgenParams(MapgenType mgtype)
- {
- switch (mgtype) {
- case MAPGEN_FLAT:
- return new MapgenFlatParams;
- case MAPGEN_FRACTAL:
- return new MapgenFractalParams;
- case MAPGEN_SINGLENODE:
- return new MapgenSinglenodeParams;
- case MAPGEN_V5:
- return new MapgenV5Params;
- case MAPGEN_V6:
- return new MapgenV6Params;
- case MAPGEN_V7:
- return new MapgenV7Params;
- case MAPGEN_VALLEYS:
- return new MapgenValleysParams;
- default:
- return NULL;
- }
- }
- void Mapgen::getMapgenNames(std::vector<const char *> *mgnames, bool include_hidden)
- {
- for (u32 i = 0; i != ARRLEN(g_reg_mapgens); i++) {
- if (include_hidden || g_reg_mapgens[i].is_user_visible)
- mgnames->push_back(g_reg_mapgens[i].name);
- }
- }
- u32 Mapgen::getBlockSeed(v3s16 p, s32 seed)
- {
- return (u32)seed +
- p.Z * 38134234 +
- p.Y * 42123 +
- p.X * 23;
- }
- u32 Mapgen::getBlockSeed2(v3s16 p, s32 seed)
- {
- u32 n = 1619 * p.X + 31337 * p.Y + 52591 * p.Z + 1013 * seed;
- n = (n >> 13) ^ n;
- return (n * (n * n * 60493 + 19990303) + 1376312589);
- }
- // Returns Y one under area minimum if not found
- s16 Mapgen::findGroundLevelFull(v2s16 p2d)
- {
- v3s16 em = vm->m_area.getExtent();
- s16 y_nodes_max = vm->m_area.MaxEdge.Y;
- s16 y_nodes_min = vm->m_area.MinEdge.Y;
- u32 i = vm->m_area.index(p2d.X, y_nodes_max, p2d.Y);
- s16 y;
- for (y = y_nodes_max; y >= y_nodes_min; y--) {
- MapNode &n = vm->m_data[i];
- if (ndef->get(n).walkable)
- break;
- vm->m_area.add_y(em, i, -1);
- }
- return (y >= y_nodes_min) ? y : y_nodes_min - 1;
- }
- // Returns -MAX_MAP_GENERATION_LIMIT if not found
- s16 Mapgen::findGroundLevel(v2s16 p2d, s16 ymin, s16 ymax)
- {
- v3s16 em = vm->m_area.getExtent();
- u32 i = vm->m_area.index(p2d.X, ymax, p2d.Y);
- s16 y;
- for (y = ymax; y >= ymin; y--) {
- MapNode &n = vm->m_data[i];
- if (ndef->get(n).walkable)
- break;
- vm->m_area.add_y(em, i, -1);
- }
- return (y >= ymin) ? y : -MAX_MAP_GENERATION_LIMIT;
- }
- // Returns -MAX_MAP_GENERATION_LIMIT if not found or if ground is found first
- s16 Mapgen::findLiquidSurface(v2s16 p2d, s16 ymin, s16 ymax)
- {
- v3s16 em = vm->m_area.getExtent();
- u32 i = vm->m_area.index(p2d.X, ymax, p2d.Y);
- s16 y;
- for (y = ymax; y >= ymin; y--) {
- MapNode &n = vm->m_data[i];
- if (ndef->get(n).walkable)
- return -MAX_MAP_GENERATION_LIMIT;
- else if (ndef->get(n).isLiquid())
- break;
- vm->m_area.add_y(em, i, -1);
- }
- return (y >= ymin) ? y : -MAX_MAP_GENERATION_LIMIT;
- }
- void Mapgen::updateHeightmap(v3s16 nmin, v3s16 nmax)
- {
- if (!heightmap)
- return;
- //TimeTaker t("Mapgen::updateHeightmap", NULL, PRECISION_MICRO);
- int index = 0;
- for (s16 z = nmin.Z; z <= nmax.Z; z++) {
- for (s16 x = nmin.X; x <= nmax.X; x++, index++) {
- s16 y = findGroundLevel(v2s16(x, z), nmin.Y, nmax.Y);
- heightmap[index] = y;
- }
- }
- }
- inline bool Mapgen::isLiquidHorizontallyFlowable(u32 vi, v3s16 em)
- {
- u32 vi_neg_x = vi;
- vm->m_area.add_x(em, vi_neg_x, -1);
- if (vm->m_data[vi_neg_x].getContent() != CONTENT_IGNORE) {
- const ContentFeatures &c_nx = ndef->get(vm->m_data[vi_neg_x]);
- if (c_nx.floodable && !c_nx.isLiquid())
- return true;
- }
- u32 vi_pos_x = vi;
- vm->m_area.add_x(em, vi_pos_x, +1);
- if (vm->m_data[vi_pos_x].getContent() != CONTENT_IGNORE) {
- const ContentFeatures &c_px = ndef->get(vm->m_data[vi_pos_x]);
- if (c_px.floodable && !c_px.isLiquid())
- return true;
- }
- u32 vi_neg_z = vi;
- vm->m_area.add_z(em, vi_neg_z, -1);
- if (vm->m_data[vi_neg_z].getContent() != CONTENT_IGNORE) {
- const ContentFeatures &c_nz = ndef->get(vm->m_data[vi_neg_z]);
- if (c_nz.floodable && !c_nz.isLiquid())
- return true;
- }
- u32 vi_pos_z = vi;
- vm->m_area.add_z(em, vi_pos_z, +1);
- if (vm->m_data[vi_pos_z].getContent() != CONTENT_IGNORE) {
- const ContentFeatures &c_pz = ndef->get(vm->m_data[vi_pos_z]);
- if (c_pz.floodable && !c_pz.isLiquid())
- return true;
- }
- return false;
- }
- void Mapgen::updateLiquid(UniqueQueue<v3s16> *trans_liquid, v3s16 nmin, v3s16 nmax)
- {
- bool isignored, isliquid, wasignored, wasliquid, waschecked, waspushed;
- v3s16 em = vm->m_area.getExtent();
- for (s16 z = nmin.Z + 1; z <= nmax.Z - 1; z++)
- for (s16 x = nmin.X + 1; x <= nmax.X - 1; x++) {
- wasignored = true;
- wasliquid = false;
- waschecked = false;
- waspushed = false;
- u32 vi = vm->m_area.index(x, nmax.Y, z);
- for (s16 y = nmax.Y; y >= nmin.Y; y--) {
- isignored = vm->m_data[vi].getContent() == CONTENT_IGNORE;
- isliquid = ndef->get(vm->m_data[vi]).isLiquid();
- if (isignored || wasignored || isliquid == wasliquid) {
- // Neither topmost node of liquid column nor topmost node below column
- waschecked = false;
- waspushed = false;
- } else if (isliquid) {
- // This is the topmost node in the column
- bool ispushed = false;
- if (isLiquidHorizontallyFlowable(vi, em)) {
- trans_liquid->push_back(v3s16(x, y, z));
- ispushed = true;
- }
- // Remember waschecked and waspushed to avoid repeated
- // checks/pushes in case the column consists of only this node
- waschecked = true;
- waspushed = ispushed;
- } else {
- // This is the topmost node below a liquid column
- u32 vi_above = vi;
- vm->m_area.add_y(em, vi_above, 1);
- if (!waspushed && (ndef->get(vm->m_data[vi]).floodable ||
- (!waschecked && isLiquidHorizontallyFlowable(vi_above, em)))) {
- // Push back the lowest node in the column which is one
- // node above this one
- trans_liquid->push_back(v3s16(x, y + 1, z));
- }
- }
- wasliquid = isliquid;
- wasignored = isignored;
- vm->m_area.add_y(em, vi, -1);
- }
- }
- }
- void Mapgen::setLighting(u8 light, v3s16 nmin, v3s16 nmax)
- {
- ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
- VoxelArea a(nmin, nmax);
- for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
- for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
- u32 i = vm->m_area.index(a.MinEdge.X, y, z);
- for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++, i++)
- vm->m_data[i].param1 = light;
- }
- }
- }
- void Mapgen::lightSpread(VoxelArea &a, v3s16 p, u8 light)
- {
- if (light <= 1 || !a.contains(p))
- return;
- u32 vi = vm->m_area.index(p);
- MapNode &n = vm->m_data[vi];
- // Decay light in each of the banks separately
- u8 light_day = light & 0x0F;
- if (light_day > 0)
- light_day -= 0x01;
- u8 light_night = light & 0xF0;
- if (light_night > 0)
- light_night -= 0x10;
- // Bail out only if we have no more light from either bank to propogate, or
- // we hit a solid block that light cannot pass through.
- if ((light_day <= (n.param1 & 0x0F) &&
- light_night <= (n.param1 & 0xF0)) ||
- !ndef->get(n).light_propagates)
- return;
- // Since this recursive function only terminates when there is no light from
- // either bank left, we need to take the max of both banks into account for
- // the case where spreading has stopped for one light bank but not the other.
- light = MYMAX(light_day, n.param1 & 0x0F) |
- MYMAX(light_night, n.param1 & 0xF0);
- n.param1 = light;
- lightSpread(a, p + v3s16(0, 0, 1), light);
- lightSpread(a, p + v3s16(0, 1, 0), light);
- lightSpread(a, p + v3s16(1, 0, 0), light);
- lightSpread(a, p - v3s16(0, 0, 1), light);
- lightSpread(a, p - v3s16(0, 1, 0), light);
- lightSpread(a, p - v3s16(1, 0, 0), light);
- }
- void Mapgen::calcLighting(v3s16 nmin, v3s16 nmax, v3s16 full_nmin, v3s16 full_nmax,
- bool propagate_shadow)
- {
- ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
- //TimeTaker t("updateLighting");
- propagateSunlight(nmin, nmax, propagate_shadow);
- spreadLight(full_nmin, full_nmax);
- //printf("updateLighting: %dms\n", t.stop());
- }
- void Mapgen::propagateSunlight(v3s16 nmin, v3s16 nmax, bool propagate_shadow)
- {
- //TimeTaker t("propagateSunlight");
- VoxelArea a(nmin, nmax);
- bool block_is_underground = (water_level >= nmax.Y);
- v3s16 em = vm->m_area.getExtent();
- // NOTE: Direct access to the low 4 bits of param1 is okay here because,
- // by definition, sunlight will never be in the night lightbank.
- for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
- for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++) {
- // see if we can get a light value from the overtop
- u32 i = vm->m_area.index(x, a.MaxEdge.Y + 1, z);
- if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
- if (block_is_underground)
- continue;
- } else if ((vm->m_data[i].param1 & 0x0F) != LIGHT_SUN &&
- propagate_shadow) {
- continue;
- }
- vm->m_area.add_y(em, i, -1);
- for (int y = a.MaxEdge.Y; y >= a.MinEdge.Y; y--) {
- MapNode &n = vm->m_data[i];
- if (!ndef->get(n).sunlight_propagates)
- break;
- n.param1 = LIGHT_SUN;
- vm->m_area.add_y(em, i, -1);
- }
- }
- }
- //printf("propagateSunlight: %dms\n", t.stop());
- }
- void Mapgen::spreadLight(v3s16 nmin, v3s16 nmax)
- {
- //TimeTaker t("spreadLight");
- VoxelArea a(nmin, nmax);
- for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
- for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
- u32 i = vm->m_area.index(a.MinEdge.X, y, z);
- for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++, i++) {
- MapNode &n = vm->m_data[i];
- if (n.getContent() == CONTENT_IGNORE)
- continue;
- const ContentFeatures &cf = ndef->get(n);
- if (!cf.light_propagates)
- continue;
- // TODO(hmmmmm): Abstract away direct param1 accesses with a
- // wrapper, but something lighter than MapNode::get/setLight
- u8 light_produced = cf.light_source;
- if (light_produced)
- n.param1 = light_produced | (light_produced << 4);
- u8 light = n.param1;
- if (light) {
- lightSpread(a, v3s16(x, y, z + 1), light);
- lightSpread(a, v3s16(x, y + 1, z ), light);
- lightSpread(a, v3s16(x + 1, y, z ), light);
- lightSpread(a, v3s16(x, y, z - 1), light);
- lightSpread(a, v3s16(x, y - 1, z ), light);
- lightSpread(a, v3s16(x - 1, y, z ), light);
- }
- }
- }
- }
- //printf("spreadLight: %dms\n", t.stop());
- }
- ////
- //// MapgenBasic
- ////
- MapgenBasic::MapgenBasic(int mapgenid, MapgenParams *params, EmergeManager *emerge)
- : Mapgen(mapgenid, params, emerge)
- {
- this->m_emerge = emerge;
- this->m_bmgr = emerge->biomemgr;
- //// Here, 'stride' refers to the number of elements needed to skip to index
- //// an adjacent element for that coordinate in noise/height/biome maps
- //// (*not* vmanip content map!)
- // Note there is no X stride explicitly defined. Items adjacent in the X
- // coordinate are assumed to be adjacent in memory as well (i.e. stride of 1).
- // Number of elements to skip to get to the next Y coordinate
- this->ystride = csize.X;
- // Number of elements to skip to get to the next Z coordinate
- this->zstride = csize.X * csize.Y;
- // Z-stride value for maps oversized for 1-down overgeneration
- this->zstride_1d = csize.X * (csize.Y + 1);
- // Z-stride value for maps oversized for 1-up 1-down overgeneration
- this->zstride_1u1d = csize.X * (csize.Y + 2);
- //// Allocate heightmap
- this->heightmap = new s16[csize.X * csize.Z];
- //// Initialize biome generator
- // TODO(hmmmm): should we have a way to disable biomemanager biomes?
- biomegen = m_bmgr->createBiomeGen(BIOMEGEN_ORIGINAL, params->bparams, csize);
- biomemap = biomegen->biomemap;
- //// Look up some commonly used content
- c_stone = ndef->getId("mapgen_stone");
- c_desert_stone = ndef->getId("mapgen_desert_stone");
- c_sandstone = ndef->getId("mapgen_sandstone");
- c_water_source = ndef->getId("mapgen_water_source");
- c_river_water_source = ndef->getId("mapgen_river_water_source");
- c_lava_source = ndef->getId("mapgen_lava_source");
- // Fall back to more basic content if not defined
- // river_water_source cannot fallback to water_source because river water
- // needs to be non-renewable and have a short flow range.
- if (c_desert_stone == CONTENT_IGNORE)
- c_desert_stone = c_stone;
- if (c_sandstone == CONTENT_IGNORE)
- c_sandstone = c_stone;
- //// Content used for dungeon generation
- c_cobble = ndef->getId("mapgen_cobble");
- c_mossycobble = ndef->getId("mapgen_mossycobble");
- c_stair_cobble = ndef->getId("mapgen_stair_cobble");
- c_stair_desert_stone = ndef->getId("mapgen_stair_desert_stone");
- c_sandstonebrick = ndef->getId("mapgen_sandstonebrick");
- c_stair_sandstone_block = ndef->getId("mapgen_stair_sandstone_block");
- // Fall back to more basic content if not defined
- if (c_mossycobble == CONTENT_IGNORE)
- c_mossycobble = c_cobble;
- if (c_stair_cobble == CONTENT_IGNORE)
- c_stair_cobble = c_cobble;
- if (c_stair_desert_stone == CONTENT_IGNORE)
- c_stair_desert_stone = c_desert_stone;
- if (c_sandstonebrick == CONTENT_IGNORE)
- c_sandstonebrick = c_sandstone;
- if (c_stair_sandstone_block == CONTENT_IGNORE)
- c_stair_sandstone_block = c_sandstonebrick;
- }
- MapgenBasic::~MapgenBasic()
- {
- delete biomegen;
- delete []heightmap;
- }
- MgStoneType MapgenBasic::generateBiomes()
- {
- // can't generate biomes without a biome generator!
- assert(biomegen);
- assert(biomemap);
- v3s16 em = vm->m_area.getExtent();
- u32 index = 0;
- MgStoneType stone_type = MGSTONE_STONE;
- noise_filler_depth->perlinMap2D(node_min.X, node_min.Z);
- for (s16 z = node_min.Z; z <= node_max.Z; z++)
- for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
- Biome *biome = NULL;
- u16 depth_top = 0;
- u16 base_filler = 0;
- u16 depth_water_top = 0;
- u16 depth_riverbed = 0;
- u32 vi = vm->m_area.index(x, node_max.Y, z);
- // Check node at base of mapchunk above, either a node of a previously
- // generated mapchunk or if not, a node of overgenerated base terrain.
- content_t c_above = vm->m_data[vi + em.X].getContent();
- bool air_above = c_above == CONTENT_AIR;
- bool river_water_above = c_above == c_river_water_source;
- bool water_above = c_above == c_water_source || river_water_above;
- biomemap[index] = BIOME_NONE;
- // If there is air or water above enable top/filler placement, otherwise force
- // nplaced to stone level by setting a number exceeding any possible filler depth.
- u16 nplaced = (air_above || water_above) ? 0 : U16_MAX;
- for (s16 y = node_max.Y; y >= node_min.Y; y--) {
- content_t c = vm->m_data[vi].getContent();
- // Biome is recalculated each time an upper surface is detected while
- // working down a column. The selected biome then remains in effect for
- // all nodes below until the next surface and biome recalculation.
- // Biome is recalculated:
- // 1. At the surface of stone below air or water.
- // 2. At the surface of water below air.
- // 3. When stone or water is detected but biome has not yet been calculated.
- bool is_stone_surface = (c == c_stone) &&
- (air_above || water_above || !biome);
- bool is_water_surface =
- (c == c_water_source || c == c_river_water_source) &&
- (air_above || !biome);
- if (is_stone_surface || is_water_surface) {
- biome = biomegen->getBiomeAtIndex(index, y);
- if (biomemap[index] == BIOME_NONE && is_stone_surface)
- biomemap[index] = biome->index;
- depth_top = biome->depth_top;
- base_filler = MYMAX(depth_top +
- biome->depth_filler +
- noise_filler_depth->result[index], 0.f);
- depth_water_top = biome->depth_water_top;
- depth_riverbed = biome->depth_riverbed;
- // Detect stone type for dungeons during every biome calculation.
- // This is more efficient than detecting per-node and will not
- // miss any desert stone or sandstone biomes.
- if (biome->c_stone == c_desert_stone)
- stone_type = MGSTONE_DESERT_STONE;
- else if (biome->c_stone == c_sandstone)
- stone_type = MGSTONE_SANDSTONE;
- }
- if (c == c_stone) {
- content_t c_below = vm->m_data[vi - em.X].getContent();
- // If the node below isn't solid, make this node stone, so that
- // any top/filler nodes above are structurally supported.
- // This is done by aborting the cycle of top/filler placement
- // immediately by forcing nplaced to stone level.
- if (c_below == CONTENT_AIR
- || c_below == c_water_source
- || c_below == c_river_water_source)
- nplaced = U16_MAX;
- if (river_water_above) {
- if (nplaced < depth_riverbed) {
- vm->m_data[vi] = MapNode(biome->c_riverbed);
- nplaced++;
- } else {
- nplaced = U16_MAX; // Disable top/filler placement
- river_water_above = false;
- }
- } else if (nplaced < depth_top) {
- vm->m_data[vi] = MapNode(biome->c_top);
- nplaced++;
- } else if (nplaced < base_filler) {
- vm->m_data[vi] = MapNode(biome->c_filler);
- nplaced++;
- } else {
- vm->m_data[vi] = MapNode(biome->c_stone);
- }
- air_above = false;
- water_above = false;
- } else if (c == c_water_source) {
- vm->m_data[vi] = MapNode((y > (s32)(water_level - depth_water_top))
- ? biome->c_water_top : biome->c_water);
- nplaced = 0; // Enable top/filler placement for next surface
- air_above = false;
- water_above = true;
- } else if (c == c_river_water_source) {
- vm->m_data[vi] = MapNode(biome->c_river_water);
- nplaced = 0; // Enable riverbed placement for next surface
- air_above = false;
- water_above = true;
- river_water_above = true;
- } else if (c == CONTENT_AIR) {
- nplaced = 0; // Enable top/filler placement for next surface
- air_above = true;
- water_above = false;
- } else { // Possible various nodes overgenerated from neighbouring mapchunks
- nplaced = U16_MAX; // Disable top/filler placement
- air_above = false;
- water_above = false;
- }
- vm->m_area.add_y(em, vi, -1);
- }
- }
- return stone_type;
- }
- void MapgenBasic::dustTopNodes()
- {
- if (node_max.Y < water_level)
- return;
- v3s16 em = vm->m_area.getExtent();
- u32 index = 0;
- for (s16 z = node_min.Z; z <= node_max.Z; z++)
- for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
- Biome *biome = (Biome *)m_bmgr->getRaw(biomemap[index]);
- if (biome->c_dust == CONTENT_IGNORE)
- continue;
- u32 vi = vm->m_area.index(x, full_node_max.Y, z);
- content_t c_full_max = vm->m_data[vi].getContent();
- s16 y_start;
- if (c_full_max == CONTENT_AIR) {
- y_start = full_node_max.Y - 1;
- } else if (c_full_max == CONTENT_IGNORE) {
- vi = vm->m_area.index(x, node_max.Y + 1, z);
- content_t c_max = vm->m_data[vi].getContent();
- if (c_max == CONTENT_AIR)
- y_start = node_max.Y;
- else
- continue;
- } else {
- continue;
- }
- vi = vm->m_area.index(x, y_start, z);
- for (s16 y = y_start; y >= node_min.Y - 1; y--) {
- if (vm->m_data[vi].getContent() != CONTENT_AIR)
- break;
- vm->m_area.add_y(em, vi, -1);
- }
- content_t c = vm->m_data[vi].getContent();
- if (!ndef->get(c).buildable_to && c != CONTENT_IGNORE && c != biome->c_dust) {
- vm->m_area.add_y(em, vi, 1);
- vm->m_data[vi] = MapNode(biome->c_dust);
- }
- }
- }
- void MapgenBasic::generateCaves(s16 max_stone_y, s16 large_cave_depth)
- {
- if (max_stone_y < node_min.Y)
- return;
- CavesNoiseIntersection caves_noise(ndef, m_bmgr, csize,
- &np_cave1, &np_cave2, seed, cave_width);
- caves_noise.generateCaves(vm, node_min, node_max, biomemap);
- if (node_max.Y > large_cave_depth)
- return;
- PseudoRandom ps(blockseed + 21343);
- u32 bruises_count = ps.range(0, 2);
- for (u32 i = 0; i < bruises_count; i++) {
- CavesRandomWalk cave(ndef, &gennotify, seed, water_level,
- c_water_source, CONTENT_IGNORE);
- cave.makeCave(vm, node_min, node_max, &ps, true, max_stone_y, heightmap);
- }
- }
- bool MapgenBasic::generateCaverns(s16 max_stone_y)
- {
- if (node_min.Y > max_stone_y || node_min.Y > cavern_limit)
- return false;
- CavernsNoise caverns_noise(ndef, csize, &np_cavern,
- seed, cavern_limit, cavern_taper, cavern_threshold);
- return caverns_noise.generateCaverns(vm, node_min, node_max);
- }
- void MapgenBasic::generateDungeons(s16 max_stone_y, MgStoneType stone_type)
- {
- if (max_stone_y < node_min.Y)
- return;
- DungeonParams dp;
- dp.seed = seed;
- dp.c_water = c_water_source;
- dp.c_river_water = c_river_water_source;
- dp.only_in_ground = true;
- dp.corridor_len_min = 1;
- dp.corridor_len_max = 13;
- dp.rooms_min = 2;
- dp.rooms_max = 16;
- dp.y_min = -MAX_MAP_GENERATION_LIMIT;
- dp.y_max = MAX_MAP_GENERATION_LIMIT;
- dp.np_density = nparams_dungeon_density;
- dp.np_alt_wall = nparams_dungeon_alt_wall;
- switch (stone_type) {
- default:
- case MGSTONE_STONE:
- dp.c_wall = c_cobble;
- dp.c_alt_wall = c_mossycobble;
- dp.c_stair = c_stair_cobble;
- dp.diagonal_dirs = false;
- dp.holesize = v3s16(1, 2, 1);
- dp.room_size_min = v3s16(4, 4, 4);
- dp.room_size_max = v3s16(8, 6, 8);
- dp.room_size_large_min = v3s16(8, 8, 8);
- dp.room_size_large_max = v3s16(16, 16, 16);
- dp.notifytype = GENNOTIFY_DUNGEON;
- break;
- case MGSTONE_DESERT_STONE:
- dp.c_wall = c_desert_stone;
- dp.c_alt_wall = CONTENT_IGNORE;
- dp.c_stair = c_stair_desert_stone;
- dp.diagonal_dirs = true;
- dp.holesize = v3s16(2, 3, 2);
- dp.room_size_min = v3s16(6, 9, 6);
- dp.room_size_max = v3s16(10, 11, 10);
- dp.room_size_large_min = v3s16(10, 13, 10);
- dp.room_size_large_max = v3s16(18, 21, 18);
- dp.notifytype = GENNOTIFY_TEMPLE;
- break;
- case MGSTONE_SANDSTONE:
- dp.c_wall = c_sandstonebrick;
- dp.c_alt_wall = CONTENT_IGNORE;
- dp.c_stair = c_stair_sandstone_block;
- dp.diagonal_dirs = false;
- dp.holesize = v3s16(2, 2, 2);
- dp.room_size_min = v3s16(6, 4, 6);
- dp.room_size_max = v3s16(10, 6, 10);
- dp.room_size_large_min = v3s16(10, 8, 10);
- dp.room_size_large_max = v3s16(18, 16, 18);
- dp.notifytype = GENNOTIFY_DUNGEON;
- break;
- }
- DungeonGen dgen(ndef, &gennotify, &dp);
- dgen.generate(vm, blockseed, full_node_min, full_node_max);
- }
- ////
- //// GenerateNotifier
- ////
- GenerateNotifier::GenerateNotifier()
- {
- }
- GenerateNotifier::GenerateNotifier(u32 notify_on,
- std::set<u32> *notify_on_deco_ids)
- {
- m_notify_on = notify_on;
- m_notify_on_deco_ids = notify_on_deco_ids;
- }
- void GenerateNotifier::setNotifyOn(u32 notify_on)
- {
- m_notify_on = notify_on;
- }
- void GenerateNotifier::setNotifyOnDecoIds(std::set<u32> *notify_on_deco_ids)
- {
- m_notify_on_deco_ids = notify_on_deco_ids;
- }
- bool GenerateNotifier::addEvent(GenNotifyType type, v3s16 pos, u32 id)
- {
- if (!(m_notify_on & (1 << type)))
- return false;
- if (type == GENNOTIFY_DECORATION &&
- m_notify_on_deco_ids->find(id) == m_notify_on_deco_ids->end())
- return false;
- GenNotifyEvent gne;
- gne.type = type;
- gne.pos = pos;
- gne.id = id;
- m_notify_events.push_back(gne);
- return true;
- }
- void GenerateNotifier::getEvents(
- std::map<std::string, std::vector<v3s16> > &event_map,
- bool peek_events)
- {
- std::list<GenNotifyEvent>::iterator it;
- for (it = m_notify_events.begin(); it != m_notify_events.end(); ++it) {
- GenNotifyEvent &gn = *it;
- std::string name = (gn.type == GENNOTIFY_DECORATION) ?
- "decoration#"+ itos(gn.id) :
- flagdesc_gennotify[gn.type].name;
- event_map[name].push_back(gn.pos);
- }
- if (!peek_events)
- m_notify_events.clear();
- }
- ////
- //// MapgenParams
- ////
- MapgenParams::~MapgenParams()
- {
- delete bparams;
- }
- void MapgenParams::readParams(const Settings *settings)
- {
- std::string seed_str;
- const char *seed_name = (settings == g_settings) ? "fixed_map_seed" : "seed";
- if (settings->getNoEx(seed_name, seed_str)) {
- if (!seed_str.empty())
- seed = read_seed(seed_str.c_str());
- else
- myrand_bytes(&seed, sizeof(seed));
- }
- std::string mg_name;
- if (settings->getNoEx("mg_name", mg_name)) {
- mgtype = Mapgen::getMapgenType(mg_name);
- if (mgtype == MAPGEN_INVALID)
- mgtype = MAPGEN_DEFAULT;
- }
- settings->getS16NoEx("water_level", water_level);
- settings->getS16NoEx("mapgen_limit", mapgen_limit);
- settings->getS16NoEx("chunksize", chunksize);
- settings->getFlagStrNoEx("mg_flags", flags, flagdesc_mapgen);
- delete bparams;
- bparams = BiomeManager::createBiomeParams(BIOMEGEN_ORIGINAL);
- if (bparams) {
- bparams->readParams(settings);
- bparams->seed = seed;
- }
- }
- void MapgenParams::writeParams(Settings *settings) const
- {
- settings->set("mg_name", Mapgen::getMapgenName(mgtype));
- settings->setU64("seed", seed);
- settings->setS16("water_level", water_level);
- settings->setS16("mapgen_limit", mapgen_limit);
- settings->setS16("chunksize", chunksize);
- settings->setFlagStr("mg_flags", flags, flagdesc_mapgen, U32_MAX);
- if (bparams)
- bparams->writeParams(settings);
- }
- // Calculate edges of outermost generated mapchunks (less than
- // 'mapgen_limit'), and corresponding exact limits for SAO entities.
- void MapgenParams::calcMapgenEdges()
- {
- if (m_mapgen_edges_calculated)
- return;
- // Central chunk offset, in blocks
- s16 ccoff_b = -chunksize / 2;
- // Chunksize, in nodes
- s32 csize_n = chunksize * MAP_BLOCKSIZE;
- // Minp/maxp of central chunk, in nodes
- s16 ccmin = ccoff_b * MAP_BLOCKSIZE;
- s16 ccmax = ccmin + csize_n - 1;
- // Fullminp/fullmaxp of central chunk, in nodes
- s16 ccfmin = ccmin - MAP_BLOCKSIZE;
- s16 ccfmax = ccmax + MAP_BLOCKSIZE;
- // Effective mapgen limit, in blocks
- // Uses same calculation as ServerMap::blockpos_over_mapgen_limit(v3s16 p)
- s16 mapgen_limit_b = rangelim(mapgen_limit,
- 0, MAX_MAP_GENERATION_LIMIT) / MAP_BLOCKSIZE;
- // Effective mapgen limits, in nodes
- s16 mapgen_limit_min = -mapgen_limit_b * MAP_BLOCKSIZE;
- s16 mapgen_limit_max = (mapgen_limit_b + 1) * MAP_BLOCKSIZE - 1;
- // Number of complete chunks from central chunk fullminp/fullmaxp
- // to effective mapgen limits.
- s16 numcmin = MYMAX((ccfmin - mapgen_limit_min) / csize_n, 0);
- s16 numcmax = MYMAX((mapgen_limit_max - ccfmax) / csize_n, 0);
- // Mapgen edges, in nodes
- mapgen_edge_min = ccmin - numcmin * csize_n;
- mapgen_edge_max = ccmax + numcmax * csize_n;
- // SAO position limits, in Irrlicht units
- m_sao_limit_min = mapgen_edge_min * BS - 3.0f;
- m_sao_limit_max = mapgen_edge_max * BS + 3.0f;
- m_mapgen_edges_calculated = true;
- }
- bool MapgenParams::saoPosOverLimit(const v3f &p)
- {
- if (!m_mapgen_edges_calculated)
- calcMapgenEdges();
- return p.X < m_sao_limit_min ||
- p.X > m_sao_limit_max ||
- p.Y < m_sao_limit_min ||
- p.Y > m_sao_limit_max ||
- p.Z < m_sao_limit_min ||
- p.Z > m_sao_limit_max;
- }
- s32 MapgenParams::getSpawnRangeMax()
- {
- calcMapgenEdges();
- return MYMIN(-mapgen_edge_min, mapgen_edge_max);
- }
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