minetest/src/mapgen.cpp
paramat 04fb10914c Dungeons: Generalise use, add capabilities, various modifications
- Generalise node names to c_wall and c_alt_wall
- Remove 'mossratio' and instead disable alt_wall loop if
  c_alt_wall == CONTENT_IGNORE
- Use one generalised 3D noise for alternative wall nodes and in
  mgv6 create moss distribution similar to the previous

- Rename rarity noise to density noise and enable the option of multiple
  dungeons per chunk determined by the value. Recreate previous distribution
- Add parameters for min and max rooms per dungeon
- Add dungeon y limits

- Integrate river water properly

Generalisation is needed now that we have sandstone and desert stone
dungeons by default and can choose any node for alternative structure.
The current code is based around cobble dungeons with mossycobble
alternative nodes, the 2 noises controlling the alternative nodes
are based on wetness.

Enabling multiple dungeons per chunk with definable number of rooms
allows the option of very dense and complex underground structures
that could interconnect to create megastructures.
Y limits are added to be consistent with other mapgen elements, and
enable locaton of dungeon or megastructure realms as part of our
'stacked realms' philosophy.
2016-06-17 04:42:42 +01:00

916 lines
25 KiB
C++

/*
Minetest
Copyright (C) 2010-2015 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
Copyright (C) 2010-2015 celeron55, Perttu Ahola <celeron55@gmail.com>
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 "cavegen.h"
#include "dungeongen.h"
FlagDesc flagdesc_mapgen[] = {
{"trees", MG_TREES},
{"caves", MG_CAVES},
{"dungeons", MG_DUNGEONS},
{"flat", MG_FLAT},
{"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}
};
////
//// Mapgen
////
Mapgen::Mapgen()
{
generating = false;
id = -1;
seed = 0;
water_level = 0;
flags = 0;
vm = NULL;
ndef = NULL;
biomegen = NULL;
biomemap = NULL;
heightmap = NULL;
}
Mapgen::Mapgen(int mapgenid, MapgenParams *params, EmergeManager *emerge) :
gennotify(emerge->gen_notify_on, &emerge->gen_notify_on_deco_ids)
{
generating = false;
id = mapgenid;
water_level = params->water_level;
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;
vm = NULL;
ndef = emerge->ndef;
biomegen = NULL;
biomemap = NULL;
heightmap = NULL;
}
Mapgen::~Mapgen()
{
}
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;
}
}
//printf("updateHeightmap: %dus\n", t.stop());
}
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_water_source = ndef->getId("mapgen_water_source");
c_desert_stone = ndef->getId("mapgen_desert_stone");
c_sandstone = ndef->getId("mapgen_sandstone");
c_river_water_source = ndef->getId("mapgen_river_water_source");
// Fall back to more basic content if not defined
if (c_desert_stone == CONTENT_IGNORE)
c_desert_stone = c_stone;
if (c_sandstone == CONTENT_IGNORE)
c_sandstone = c_stone;
if (c_river_water_source == CONTENT_IGNORE)
c_river_water_source = c_water_source;
//// Content used for dungeon generation
c_cobble = ndef->getId("mapgen_cobble");
c_stair_cobble = ndef->getId("mapgen_stair_cobble");
c_mossycobble = ndef->getId("mapgen_mossycobble");
c_sandstonebrick = ndef->getId("mapgen_sandstonebrick");
c_stair_sandstonebrick = ndef->getId("mapgen_stair_sandstonebrick");
// 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_sandstonebrick == CONTENT_IGNORE)
c_sandstonebrick = c_sandstone;
if (c_stair_sandstonebrick == CONTENT_IGNORE)
c_stair_sandstonebrick = c_sandstone;
}
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);
}
}
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.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.roomsize = v3s16(0, 0, 0);
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_desert_stone;
dp.diagonal_dirs = true;
dp.holesize = v3s16(2, 3, 2);
dp.roomsize = v3s16(2, 5, 2);
dp.notifytype = GENNOTIFY_TEMPLE;
break;
case MGSTONE_SANDSTONE:
dp.c_wall = c_sandstonebrick;
dp.c_alt_wall = CONTENT_IGNORE;
dp.c_stair = c_sandstonebrick;
dp.diagonal_dirs = false;
dp.holesize = v3s16(2, 2, 2);
dp.roomsize = v3s16(2, 0, 2);
dp.notifytype = GENNOTIFY_DUNGEON;
break;
}
DungeonGen dgen(ndef, &gennotify, &dp);
dgen.generate(vm, blockseed, full_node_min, full_node_max);
}
////
//// GenerateNotifier
////
GenerateNotifier::GenerateNotifier()
{
m_notify_on = 0;
}
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;
delete sparams;
}
void MapgenParams::load(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) && !seed_str.empty())
seed = read_seed(seed_str.c_str());
else
myrand_bytes(&seed, sizeof(seed));
settings.getNoEx("mg_name", mg_name);
settings.getS16NoEx("water_level", water_level);
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;
}
delete sparams;
MapgenFactory *mgfactory = EmergeManager::getMapgenFactory(mg_name);
if (mgfactory) {
sparams = mgfactory->createMapgenParams();
sparams->readParams(&settings);
}
}
void MapgenParams::save(Settings &settings) const
{
settings.set("mg_name", mg_name);
settings.setU64("seed", seed);
settings.setS16("water_level", water_level);
settings.setS16("chunksize", chunksize);
settings.setFlagStr("mg_flags", flags, flagdesc_mapgen, U32_MAX);
if (bparams)
bparams->writeParams(&settings);
if (sparams)
sparams->writeParams(&settings);
}