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minetest/src/mapgen_v6.cpp

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/*
Minetest
Copyright (C) 2010-2013 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 "mapblock.h"
#include "mapnode.h"
#include "map.h"
//#include "serverobject.h"
#include "content_sao.h"
#include "nodedef.h"
#include "content_mapnode.h" // For content_mapnode_get_new_name
#include "voxelalgorithms.h"
#include "profiler.h"
#include "settings.h" // For g_settings
#include "main.h" // For g_profiler
#include "emerge.h"
#include "dungeongen.h"
#include "treegen.h"
#include "mapgen_v6.h"
/////////////////// Mapgen V6 perlin noise default values
NoiseParams nparams_v6_def_terrain_base =
{-AVERAGE_MUD_AMOUNT, 20.0, v3f(250.0, 250.0, 250.0), 82341, 5, 0.6};
NoiseParams nparams_v6_def_terrain_higher =
{20.0, 16.0, v3f(500.0, 500.0, 500.0), 85039, 5, 0.6};
NoiseParams nparams_v6_def_steepness =
{0.85, 0.5, v3f(125.0, 125.0, 125.0), -932, 5, 0.7};
NoiseParams nparams_v6_def_height_select =
{0.5, 1.0, v3f(250.0, 250.0, 250.0), 4213, 5, 0.69};
NoiseParams nparams_v6_def_mud =
{AVERAGE_MUD_AMOUNT, 2.0, v3f(200.0, 200.0, 200.0), 91013, 3, 0.55};
NoiseParams nparams_v6_def_beach =
{0.0, 1.0, v3f(250.0, 250.0, 250.0), 59420, 3, 0.50};
NoiseParams nparams_v6_def_biome =
{0.0, 1.0, v3f(250.0, 250.0, 250.0), 9130, 3, 0.50};
NoiseParams nparams_v6_def_cave =
{6.0, 6.0, v3f(250.0, 250.0, 250.0), 34329, 3, 0.50};
NoiseParams nparams_v6_def_humidity =
{0.5, 0.5, v3f(500.0, 500.0, 500.0), 72384, 4, 0.66};
NoiseParams nparams_v6_def_trees =
{0.0, 1.0, v3f(125.0, 125.0, 125.0), 2, 4, 0.66};
NoiseParams nparams_v6_def_apple_trees =
{0.0, 1.0, v3f(100.0, 100.0, 100.0), 342902, 3, 0.45};
///////////////////////////////////////////////////////////////////////////////
MapgenV6::MapgenV6(int mapgenid, MapgenV6Params *params, EmergeManager *emerge) {
this->generating = false;
this->id = mapgenid;
this->emerge = emerge;
this->seed = (int)params->seed;
this->water_level = params->water_level;
this->flags = params->flags;
this->csize = v3s16(1, 1, 1) * params->chunksize * MAP_BLOCKSIZE;
this->freq_desert = params->freq_desert;
this->freq_beach = params->freq_beach;
this->ystride = csize.X; //////fix this
np_cave = params->np_cave;
np_humidity = params->np_humidity;
np_trees = params->np_trees;
np_apple_trees = params->np_apple_trees;
noise_terrain_base = new Noise(params->np_terrain_base, seed, csize.X, csize.Y);
noise_terrain_higher = new Noise(params->np_terrain_higher, seed, csize.X, csize.Y);
noise_steepness = new Noise(params->np_steepness, seed, csize.X, csize.Y);
noise_height_select = new Noise(params->np_height_select, seed, csize.X, csize.Y);
noise_mud = new Noise(params->np_mud, seed, csize.X, csize.Y);
noise_beach = new Noise(params->np_beach, seed, csize.X, csize.Y);
noise_biome = new Noise(params->np_biome, seed, csize.X, csize.Y);
}
MapgenV6::~MapgenV6() {
delete noise_terrain_base;
delete noise_terrain_higher;
delete noise_steepness;
delete noise_height_select;
delete noise_mud;
delete noise_beach;
delete noise_biome;
}
//////////////////////// Some helper functions for the map generator
// Returns Y one under area minimum if not found
s16 MapgenV6::find_ground_level(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 Y one under area minimum if not found
s16 MapgenV6::find_stone_level(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];
content_t c = n.getContent();
if (c != CONTENT_IGNORE && (
c == c_stone || c == c_desert_stone))
break;
vm->m_area.add_y(em, i, -1);
}
return (y >= y_nodes_min) ? y : y_nodes_min - 1;
}
// Required by mapgen.h
bool MapgenV6::block_is_underground(u64 seed, v3s16 blockpos)
{
/*s16 minimum_groundlevel = (s16)get_sector_minimum_ground_level(
seed, v2s16(blockpos.X, blockpos.Z));*/
// Nah, this is just a heuristic, just return something
s16 minimum_groundlevel = water_level;
if(blockpos.Y*MAP_BLOCKSIZE + MAP_BLOCKSIZE <= minimum_groundlevel)
return true;
else
return false;
}
//////////////////////// Base terrain height functions
float MapgenV6::baseTerrainLevel(float terrain_base, float terrain_higher,
float steepness, float height_select) {
float base = water_level + terrain_base;
float higher = water_level + terrain_higher;
// Limit higher ground level to at least base
if(higher < base)
higher = base;
// Steepness factor of cliffs
float b = steepness;
b = rangelim(b, 0.0, 1000.0);
b = 5 * b * b * b * b * b * b * b;
b = rangelim(b, 0.5, 1000.0);
// Values 1.5...100 give quite horrible looking slopes
if (b > 1.5 && b < 100.0)
b = (b < 10.0) ? 1.5 : 100.0;
float a_off = -0.20; // Offset to more low
float a = 0.5 + b * (a_off + height_select);
a = rangelim(a, 0.0, 1.0); // Limit
return base * (1.0 - a) + higher * a;
}
float MapgenV6::baseTerrainLevelFromNoise(v2s16 p) {
if (flags & MG_FLAT)
return water_level;
float terrain_base = NoisePerlin2DPosOffset(noise_terrain_base->np,
p.X, 0.5, p.Y, 0.5, seed);
float terrain_higher = NoisePerlin2DPosOffset(noise_terrain_higher->np,
p.X, 0.5, p.Y, 0.5, seed);
float steepness = NoisePerlin2DPosOffset(noise_steepness->np,
p.X, 0.5, p.Y, 0.5, seed);
float height_select = NoisePerlin2DNoTxfmPosOffset(noise_height_select->np,
p.X, 0.5, p.Y, 0.5, seed);
return baseTerrainLevel(terrain_base, terrain_higher,
steepness, height_select);
}
float MapgenV6::baseTerrainLevelFromMap(v2s16 p) {
int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
return baseTerrainLevelFromMap(index);
}
float MapgenV6::baseTerrainLevelFromMap(int index) {
if (flags & MG_FLAT)
return water_level;
float terrain_base = noise_terrain_base->result[index];
float terrain_higher = noise_terrain_higher->result[index];
float steepness = noise_steepness->result[index];
float height_select = noise_height_select->result[index];
return baseTerrainLevel(terrain_base, terrain_higher,
steepness, height_select);
}
s16 MapgenV6::find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision) {
return baseTerrainLevelFromNoise(p2d) + AVERAGE_MUD_AMOUNT;
}
int MapgenV6::getGroundLevelAtPoint(v2s16 p) {
return baseTerrainLevelFromNoise(p) + AVERAGE_MUD_AMOUNT;
}
//////////////////////// Noise functions
float MapgenV6::getMudAmount(v2s16 p) {
int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
return getMudAmount(index);
}
bool MapgenV6::getHaveBeach(v2s16 p) {
int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
return getHaveBeach(index);
}
BiomeType MapgenV6::getBiome(v2s16 p) {
int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
return getBiome(index, p);
}
float MapgenV6::getHumidity(v2s16 p)
{
/*double noise = noise2d_perlin(
0.5+(float)p.X/500, 0.5+(float)p.Y/500,
seed+72384, 4, 0.66);
noise = (noise + 1.0)/2.0;*/
float noise = NoisePerlin2D(np_humidity, p.X, p.Y, seed);
if (noise < 0.0)
noise = 0.0;
if (noise > 1.0)
noise = 1.0;
return noise;
}
float MapgenV6::getTreeAmount(v2s16 p)
{
/*double noise = noise2d_perlin(
0.5+(float)p.X/125, 0.5+(float)p.Y/125,
seed+2, 4, 0.66);*/
float noise = NoisePerlin2D(np_trees, p.X, p.Y, seed);
float zeroval = -0.39;
if (noise < zeroval)
return 0;
else
return 0.04 * (noise-zeroval) / (1.0-zeroval);
}
bool MapgenV6::getHaveAppleTree(v2s16 p)
{
/*is_apple_tree = noise2d_perlin(
0.5+(float)p.X/100, 0.5+(float)p.Z/100,
data->seed+342902, 3, 0.45) > 0.2;*/
float noise = NoisePerlin2D(np_apple_trees, p.X, p.Y, seed);
return noise > 0.2;
}
float MapgenV6::getMudAmount(int index)
{
if (flags & MG_FLAT)
return AVERAGE_MUD_AMOUNT;
/*return ((float)AVERAGE_MUD_AMOUNT + 2.0 * noise2d_perlin(
0.5+(float)p.X/200, 0.5+(float)p.Y/200,
seed+91013, 3, 0.55));*/
return noise_mud->result[index];
}
bool MapgenV6::getHaveBeach(int index)
{
// Determine whether to have sand here
/*double sandnoise = noise2d_perlin(
0.2+(float)p2d.X/250, 0.7+(float)p2d.Y/250,
seed+59420, 3, 0.50);*/
float sandnoise = noise_beach->result[index];
return (sandnoise > freq_beach);
}
BiomeType MapgenV6::getBiome(int index, v2s16 p)
{
// Just do something very simple as for now
/*double d = noise2d_perlin(
0.6+(float)p2d.X/250, 0.2+(float)p2d.Y/250,
seed+9130, 3, 0.50);*/
float d = noise_biome->result[index];
if (d > freq_desert)
return BT_DESERT;
if ((flags & MGV6_BIOME_BLEND) &&
(d > freq_desert - 0.10) &&
((noise2d(p.X, p.Y, seed) + 1.0) > (freq_desert - d) * 20.0))
return BT_DESERT;
return BT_NORMAL;
}
u32 MapgenV6::get_blockseed(u64 seed, v3s16 p)
{
s32 x=p.X, y=p.Y, z=p.Z;
return (u32)(seed%0x100000000ULL) + z*38134234 + y*42123 + x*23;
}
//////////////////////// Map generator
void MapgenV6::makeChunk(BlockMakeData *data) {
assert(data->vmanip);
assert(data->nodedef);
assert(data->blockpos_requested.X >= data->blockpos_min.X &&
data->blockpos_requested.Y >= data->blockpos_min.Y &&
data->blockpos_requested.Z >= data->blockpos_min.Z);
assert(data->blockpos_requested.X <= data->blockpos_max.X &&
data->blockpos_requested.Y <= data->blockpos_max.Y &&
data->blockpos_requested.Z <= data->blockpos_max.Z);
this->generating = true;
this->vm = data->vmanip;
this->ndef = data->nodedef;
// Hack: use minimum block coords for old code that assumes a single block
v3s16 blockpos = data->blockpos_requested;
v3s16 blockpos_min = data->blockpos_min;
v3s16 blockpos_max = data->blockpos_max;
v3s16 blockpos_full_min = blockpos_min - v3s16(1,1,1);
v3s16 blockpos_full_max = blockpos_max + v3s16(1,1,1);
// Area of central chunk
node_min = blockpos_min*MAP_BLOCKSIZE;
node_max = (blockpos_max+v3s16(1,1,1))*MAP_BLOCKSIZE-v3s16(1,1,1);
// Full allocated area
full_node_min = (blockpos_min-1)*MAP_BLOCKSIZE;
full_node_max = (blockpos_max+2)*MAP_BLOCKSIZE-v3s16(1,1,1);
central_area_size = node_max - node_min + v3s16(1,1,1);
assert(central_area_size.X == central_area_size.Z);
int volume_blocks = (blockpos_max.X - blockpos_min.X + 1)
* (blockpos_max.Y - blockpos_min.Y + 1)
* (blockpos_max.Z - blockpos_max.Z + 1);
volume_nodes = volume_blocks *
MAP_BLOCKSIZE * MAP_BLOCKSIZE * MAP_BLOCKSIZE;
// Create a block-specific seed
blockseed = get_blockseed(data->seed, full_node_min);
// Make some noise
calculateNoise();
c_stone = ndef->getId("mapgen_stone");
c_dirt = ndef->getId("mapgen_dirt");
c_dirt_with_grass = ndef->getId("mapgen_dirt_with_grass");
c_sand = ndef->getId("mapgen_sand");
c_water_source = ndef->getId("mapgen_water_source");
c_lava_source = ndef->getId("mapgen_lava_source");
c_gravel = ndef->getId("mapgen_gravel");
c_cobble = ndef->getId("mapgen_cobble");
c_desert_sand = ndef->getId("mapgen_desert_sand");
c_desert_stone = ndef->getId("mapgen_desert_stone");
if (c_desert_sand == CONTENT_IGNORE)
c_desert_sand = c_sand;
if (c_desert_stone == CONTENT_IGNORE)
c_desert_stone = c_stone;
// Maximum height of the stone surface and obstacles.
// This is used to guide the cave generation
s16 stone_surface_max_y;
// Generate general ground level to full area
stone_surface_max_y = generateGround();
generateSomething();
const s16 max_spread_amount = MAP_BLOCKSIZE;
// Limit dirt flow area by 1 because mud is flown into neighbors.
s16 mudflow_minpos = -max_spread_amount + 1;
s16 mudflow_maxpos = central_area_size.X + max_spread_amount - 2;
// Loop this part, it will make stuff look older and newer nicely
const u32 age_loops = 2;
for (u32 i_age = 0; i_age < age_loops; i_age++) { // Aging loop
// Make caves (this code is relatively horrible)
if (flags & MG_CAVES)
generateCaves(stone_surface_max_y);
// Add mud to the central chunk
addMud();
// Add blobs of dirt and gravel underground
addDirtGravelBlobs();
// Flow mud away from steep edges
flowMud(mudflow_minpos, mudflow_maxpos);
}
// Add dungeons
if (flags & MG_DUNGEONS) {
DungeonGen dgen(ndef, data->seed, water_level);
dgen.generate(vm, blockseed, full_node_min, full_node_max);
}
// Add top and bottom side of water to transforming_liquid queue
updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
// Grow grass
growGrass();
// Generate some trees, and add grass, if a jungle
if (flags & MG_TREES)
placeTreesAndJungleGrass();
// Generate the registered ores
for (unsigned int i = 0; i != emerge->ores.size(); i++) {
Ore *ore = emerge->ores[i];
ore->generate(this, blockseed + i, node_min, node_max);
}
// Calculate lighting
calcLighting(node_min, node_max);
this->generating = false;
}
void MapgenV6::calculateNoise() {
int x = node_min.X;
int z = node_min.Z;
// Need to adjust for the original implementation's +.5 offset...
if (!(flags & MG_FLAT)) {
noise_terrain_base->perlinMap2D(
x + 0.5 * noise_terrain_base->np->spread.X,
z + 0.5 * noise_terrain_base->np->spread.Z);
noise_terrain_base->transformNoiseMap();
noise_terrain_higher->perlinMap2D(
x + 0.5 * noise_terrain_higher->np->spread.X,
z + 0.5 * noise_terrain_higher->np->spread.Z);
noise_terrain_higher->transformNoiseMap();
noise_steepness->perlinMap2D(
x + 0.5 * noise_steepness->np->spread.X,
z + 0.5 * noise_steepness->np->spread.Z);
noise_steepness->transformNoiseMap();
noise_height_select->perlinMap2D(
x + 0.5 * noise_height_select->np->spread.X,
z + 0.5 * noise_height_select->np->spread.Z);
noise_mud->perlinMap2D(
x + 0.5 * noise_mud->np->spread.X,
z + 0.5 * noise_mud->np->spread.Z);
noise_mud->transformNoiseMap();
}
noise_beach->perlinMap2D(
x + 0.2 * noise_beach->np->spread.X,
z + 0.7 * noise_beach->np->spread.Z);
noise_biome->perlinMap2D(
x + 0.6 * noise_biome->np->spread.X,
z + 0.2 * noise_biome->np->spread.Z);
}
int MapgenV6::generateGround() {
//TimeTaker timer1("Generating ground level");
MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
MapNode n_stone(c_stone), n_desert_stone(c_desert_stone);
int stone_surface_max_y = -MAP_GENERATION_LIMIT;
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++) {
// Surface height
s16 surface_y = (s16)baseTerrainLevelFromMap(index);
// Log it
if (surface_y > stone_surface_max_y)
stone_surface_max_y = surface_y;
BiomeType bt = getBiome(index, v2s16(x, z));
// Fill ground with stone
v3s16 em = vm->m_area.getExtent();
u32 i = vm->m_area.index(x, node_min.Y, z);
for (s16 y = node_min.Y; y <= node_max.Y; y++) {
if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
if (y <= surface_y) {
vm->m_data[i] = (y > water_level && bt == BT_DESERT) ?
n_desert_stone : n_stone;
} else if (y <= water_level) {
vm->m_data[i] = n_water_source;
} else {
vm->m_data[i] = n_air;
}
}
vm->m_area.add_y(em, i, 1);
}
}
return stone_surface_max_y;
}
void MapgenV6::addMud() {
// 15ms @cs=8
//TimeTaker timer1("add mud");
MapNode n_dirt(c_dirt), n_gravel(c_gravel);
MapNode n_sand(c_sand), n_desert_sand(c_desert_sand);
MapNode addnode;
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++) {
// Randomize mud amount
s16 mud_add_amount = getMudAmount(index) / 2.0 + 0.5;
// Find ground level
s16 surface_y = find_stone_level(v2s16(x, z)); /////////////////optimize this!
// Handle area not found
if (surface_y == vm->m_area.MinEdge.Y - 1)
continue;
BiomeType bt = getBiome(index, v2s16(x, z));
addnode = (bt == BT_DESERT) ? n_desert_sand : n_dirt;
if (bt == BT_DESERT && surface_y + mud_add_amount <= water_level + 1) {
addnode = n_sand;
} else if (mud_add_amount <= 0) {
mud_add_amount = 1 - mud_add_amount;
addnode = n_gravel;
} else if (bt == BT_NORMAL && getHaveBeach(index) &&
surface_y + mud_add_amount <= water_level + 2) {
addnode = n_sand;
}
if (bt == BT_DESERT && surface_y > 20)
mud_add_amount = MYMAX(0, mud_add_amount - (surface_y - 20) / 5);
// If topmost node is grass, change it to mud. It might be if it was
// flown to there from a neighboring chunk and then converted.
u32 i = vm->m_area.index(x, surface_y, z);
if (vm->m_data[i].getContent() == c_dirt_with_grass)
vm->m_data[i] = n_dirt;
// Add mud on ground
s16 mudcount = 0;
v3s16 em = vm->m_area.getExtent();
s16 y_start = surface_y + 1;
i = vm->m_area.index(x, y_start, z);
for (s16 y = y_start; y <= node_max.Y; y++) {
if (mudcount >= mud_add_amount)
break;
vm->m_data[i] = addnode;
mudcount++;
vm->m_area.add_y(em, i, 1);
}
}
}
void MapgenV6::flowMud(s16 &mudflow_minpos, s16 &mudflow_maxpos) {
// 340ms @cs=8
TimeTaker timer1("flow mud");
// Iterate a few times
for(s16 k = 0; k < 3; k++) {
for (s16 z = mudflow_minpos; z <= mudflow_maxpos; z++)
for (s16 x = mudflow_minpos; x <= mudflow_maxpos; x++) {
// Invert coordinates every 2nd iteration
if (k % 2 == 0) {
x = mudflow_maxpos - (x - mudflow_minpos);
z = mudflow_maxpos - (z - mudflow_minpos);
}
// Node position in 2d
v2s16 p2d = v2s16(node_min.X, node_min.Z) + v2s16(x, z);
v3s16 em = vm->m_area.getExtent();
u32 i = vm->m_area.index(p2d.X, node_max.Y, p2d.Y);
s16 y = node_max.Y;
while(y >= node_min.Y)
{
for(;; y--)
{
MapNode *n = NULL;
// Find mud
for(; y >= node_min.Y; y--) {
n = &vm->m_data[i];
if (n->getContent() == c_dirt ||
n->getContent() == c_dirt_with_grass ||
n->getContent() == c_gravel)
break;
vm->m_area.add_y(em, i, -1);
}
// Stop if out of area
//if(vmanip.m_area.contains(i) == false)
if (y < node_min.Y)
break;
if (n->getContent() == c_dirt ||
n->getContent() == c_dirt_with_grass)
{
// Make it exactly mud
n->setContent(c_dirt);
// Don't flow it if the stuff under it is not mud
{
u32 i2 = i;
vm->m_area.add_y(em, i2, -1);
// Cancel if out of area
if(vm->m_area.contains(i2) == false)
continue;
MapNode *n2 = &vm->m_data[i2];
if (n2->getContent() != c_dirt &&
n2->getContent() != c_dirt_with_grass)
continue;
}
}
v3s16 dirs4[4] = {
v3s16(0,0,1), // back
v3s16(1,0,0), // right
v3s16(0,0,-1), // front
v3s16(-1,0,0), // left
};
// Check that upper is air or doesn't exist.
// Cancel dropping if upper keeps it in place
u32 i3 = i;
vm->m_area.add_y(em, i3, 1);
if (vm->m_area.contains(i3) == true &&
ndef->get(vm->m_data[i3]).walkable)
continue;
// Drop mud on side
for(u32 di=0; di<4; di++) {
v3s16 dirp = dirs4[di];
u32 i2 = i;
// Move to side
vm->m_area.add_p(em, i2, dirp);
// Fail if out of area
if (vm->m_area.contains(i2) == false)
continue;
// Check that side is air
MapNode *n2 = &vm->m_data[i2];
if (ndef->get(*n2).walkable)
continue;
// Check that under side is air
vm->m_area.add_y(em, i2, -1);
if (vm->m_area.contains(i2) == false)
continue;
n2 = &vm->m_data[i2];
if (ndef->get(*n2).walkable)
continue;
// Loop further down until not air
bool dropped_to_unknown = false;
do {
vm->m_area.add_y(em, i2, -1);
n2 = &vm->m_data[i2];
// if out of known area
if(vm->m_area.contains(i2) == false ||
n2->getContent() == CONTENT_IGNORE) {
dropped_to_unknown = true;
break;
}
} while (ndef->get(*n2).walkable == false);
// Loop one up so that we're in air
vm->m_area.add_y(em, i2, 1);
n2 = &vm->m_data[i2];
bool old_is_water = (n->getContent() == c_water_source);
// Move mud to new place
if (!dropped_to_unknown) {
*n2 = *n;
// Set old place to be air (or water)
if(old_is_water)
*n = MapNode(c_water_source);
else
*n = MapNode(CONTENT_AIR);
}
// Done
break;
}
}
}
}
}
}
void MapgenV6::addDirtGravelBlobs() {
if (getBiome(v2s16(node_min.X, node_min.Z)) != BT_NORMAL)
return;
PseudoRandom pr(blockseed + 983);
for (int i = 0; i < volume_nodes/10/10/10; i++) {
bool only_fill_cave = (myrand_range(0,1) != 0);
v3s16 size(
pr.range(1, 8),
pr.range(1, 8),
pr.range(1, 8)
);
v3s16 p0(
pr.range(node_min.X, node_max.X) - size.X / 2,
pr.range(node_min.Y, node_max.Y) - size.Y / 2,
pr.range(node_min.Z, node_max.Z) - size.Z / 2
);
MapNode n1((p0.Y > -32 && !pr.range(0, 1)) ? c_dirt : c_gravel);
for (int z1 = 0; z1 < size.Z; z1++)
for (int y1 = 0; y1 < size.Y; y1++)
for (int x1 = 0; x1 < size.X; x1++) {
v3s16 p = p0 + v3s16(x1, y1, z1);
u32 i = vm->m_area.index(p);
if (!vm->m_area.contains(i))
continue;
// Cancel if not stone and not cave air
if (vm->m_data[i].getContent() != c_stone &&
!(vm->m_flags[i] & VMANIP_FLAG_CAVE))
continue;
if (only_fill_cave && !(vm->m_flags[i] & VMANIP_FLAG_CAVE))
continue;
vm->m_data[i] = n1;
}
}
}
void MapgenV6::placeTreesAndJungleGrass() {
//TimeTaker t("placeTrees");
if (node_max.Y < water_level)
return;
PseudoRandom grassrandom(blockseed + 53);
content_t c_junglegrass = ndef->getId("mapgen_junglegrass");
// if we don't have junglegrass, don't place cignore... that's bad
if (c_junglegrass == CONTENT_IGNORE)
c_junglegrass = CONTENT_AIR;
MapNode n_junglegrass(c_junglegrass);
v3s16 em = vm->m_area.getExtent();
// Divide area into parts
s16 div = 8;
s16 sidelen = central_area_size.X / div;
double area = sidelen * sidelen;
// N.B. We must add jungle grass first, since tree leaves will
// obstruct the ground, giving us a false ground level
for (s16 z0 = 0; z0 < div; z0++)
for (s16 x0 = 0; x0 < div; x0++) {
// Center position of part of division
v2s16 p2d_center(
node_min.X + sidelen / 2 + sidelen * x0,
node_min.Z + sidelen / 2 + sidelen * z0
);
// Minimum edge of part of division
v2s16 p2d_min(
node_min.X + sidelen * x0,
node_min.Z + sidelen * z0
);
// Maximum edge of part of division
v2s16 p2d_max(
node_min.X + sidelen + sidelen * x0 - 1,
node_min.Z + sidelen + sidelen * z0 - 1
);
// Amount of trees, jungle area
u32 tree_count = area * getTreeAmount(p2d_center);
float humidity;
bool is_jungle = false;
if (flags & MGV6_JUNGLES) {
humidity = getHumidity(p2d_center);
if (humidity > 0.75) {
is_jungle = true;
tree_count *= 4;
}
}
// Add jungle grass
if (is_jungle) {
u32 grass_count = 5 * humidity * tree_count;
for (u32 i = 0; i < grass_count; i++) {
s16 x = grassrandom.range(p2d_min.X, p2d_max.X);
s16 z = grassrandom.range(p2d_min.Y, p2d_max.Y);
s16 y = find_ground_level(v2s16(x, z)); ////////////////optimize this!
if (y < water_level || y < node_min.Y || y > node_max.Y)
continue;
u32 vi = vm->m_area.index(x, y, z);
// place on dirt_with_grass, since we know it is exposed to sunlight
if (vm->m_data[vi].getContent() == c_dirt_with_grass) {
vm->m_area.add_y(em, vi, 1);
vm->m_data[vi] = n_junglegrass;
}
}
}
// Put trees in random places on part of division
for (u32 i = 0; i < tree_count; i++) {
s16 x = myrand_range(p2d_min.X, p2d_max.X);
s16 z = myrand_range(p2d_min.Y, p2d_max.Y);
s16 y = find_ground_level(v2s16(x, z)); ////////////////////optimize this!
// Don't make a tree under water level
// Don't make a tree so high that it doesn't fit
if(y < water_level || y > node_max.Y - 6)
continue;
v3s16 p(x,y,z);
// Trees grow only on mud and grass
{
u32 i = vm->m_area.index(p);
MapNode *n = &vm->m_data[i];
if (n->getContent() != c_dirt &&
n->getContent() != c_dirt_with_grass)
continue;
}
p.Y++;
// Make a tree
if (is_jungle) {
treegen::make_jungletree(*vm, p, ndef, myrand());
} else {
bool is_apple_tree = (myrand_range(0, 3) == 0) &&
getHaveAppleTree(v2s16(x, z));
treegen::make_tree(*vm, p, is_apple_tree, ndef, myrand());
}
}
}
//printf("placeTreesAndJungleGrass: %dms\n", t.stop());
}
void MapgenV6::growGrass() {
for (s16 z = full_node_min.Z; z <= full_node_max.Z; z++)
for (s16 x = full_node_min.X; x <= full_node_max.X; x++) {
// Find the lowest surface to which enough light ends up to make
// grass grow. Basically just wait until not air and not leaves.
s16 surface_y = 0;
{
v3s16 em = vm->m_area.getExtent();
u32 i = vm->m_area.index(x, node_max.Y, z);
s16 y;
// Go to ground level
for (y = node_max.Y; y >= full_node_min.Y; y--) {
MapNode &n = vm->m_data[i];
if (ndef->get(n).param_type != CPT_LIGHT ||
ndef->get(n).liquid_type != LIQUID_NONE)
break;
vm->m_area.add_y(em, i, -1);
}
surface_y = (y >= full_node_min.Y) ? y : full_node_min.Y;
}
u32 i = vm->m_area.index(x, surface_y, z);
MapNode *n = &vm->m_data[i];
if (n->getContent() == c_dirt && surface_y >= water_level - 20)
n->setContent(c_dirt_with_grass);
}
}
void MapgenV6::defineCave(Cave &cave, PseudoRandom ps,
v3s16 node_min, bool large_cave) {
cave.min_tunnel_diameter = 2;
cave.max_tunnel_diameter = ps.range(2,6);
cave.dswitchint = ps.range(1,14);
cave.flooded = true; //large_cave && ps.range(0,4);
if (large_cave){
cave.part_max_length_rs = ps.range(2,4);
cave.tunnel_routepoints = ps.range(5, ps.range(15,30));
cave.min_tunnel_diameter = 5;
cave.max_tunnel_diameter = ps.range(7, ps.range(8,24));
} else {
cave.part_max_length_rs = ps.range(2,9);
cave.tunnel_routepoints = ps.range(10, ps.range(15,30));
}
cave.large_cave_is_flat = (ps.range(0,1) == 0);
}
void MapgenV6::generateCaves(int max_stone_y) {
// 24ms @cs=8
//TimeTaker timer1("caves");
/*double cave_amount = 6.0 + 6.0 * noise2d_perlin(
0.5+(double)node_min.X/250, 0.5+(double)node_min.Y/250,
data->seed+34329, 3, 0.50);*/
const s16 max_spread_amount = MAP_BLOCKSIZE;
float cave_amount = NoisePerlin2D(np_cave, node_min.X, node_min.Y, seed);
cave_amount = MYMAX(0.0, cave_amount);
u32 caves_count = cave_amount * volume_nodes / 50000;
u32 bruises_count = 1;
PseudoRandom ps(blockseed + 21343);
PseudoRandom ps2(blockseed + 1032);
if (ps.range(1, 6) == 1)
bruises_count = ps.range(0, ps.range(0, 2));
if (getBiome(v2s16(node_min.X, node_min.Z)) == BT_DESERT) {
caves_count /= 3;
bruises_count /= 3;
}
for(u32 jj = 0; jj < caves_count + bruises_count; jj++) {
/*int avg_height = (int)
((base_rock_level_2d(data->seed, v2s16(node_min.X, node_min.Z)) +
base_rock_level_2d(data->seed, v2s16(node_max.X, node_max.Z))) / 2);
if ((node_max.Y + node_min.Y) / 2 > avg_height)
break;*/
bool large_cave = (jj >= caves_count);
Cave cave;
defineCave(cave, ps, node_min, large_cave);
v3f main_direction(0,0,0);
// Allowed route area size in nodes
v3s16 ar = central_area_size;
// Area starting point in nodes
v3s16 of = node_min;
// Allow a bit more
//(this should be more than the maximum radius of the tunnel)
s16 insure = 10;
s16 more = max_spread_amount - cave.max_tunnel_diameter / 2 - insure;
ar += v3s16(1,0,1) * more * 2;
of -= v3s16(1,0,1) * more;
s16 route_y_min = 0;
// Allow half a diameter + 7 over stone surface
s16 route_y_max = -of.Y + max_stone_y + cave.max_tunnel_diameter/2 + 7;
// Limit maximum to area
route_y_max = rangelim(route_y_max, 0, ar.Y-1);
if(large_cave)
{
s16 min = 0;
if(node_min.Y < water_level && node_max.Y > water_level)
{
min = water_level - cave.max_tunnel_diameter/3 - of.Y;
route_y_max = water_level + cave.max_tunnel_diameter/3 - of.Y;
}
route_y_min = ps.range(min, min + cave.max_tunnel_diameter);
route_y_min = rangelim(route_y_min, 0, route_y_max);
}
s16 route_start_y_min = route_y_min;
s16 route_start_y_max = route_y_max;
route_start_y_min = rangelim(route_start_y_min, 0, ar.Y-1);
route_start_y_max = rangelim(route_start_y_max, route_start_y_min, ar.Y-1);
// Randomize starting position
v3f orp(
(float)(ps.next()%ar.X)+0.5,
(float)(ps.range(route_start_y_min, route_start_y_max))+0.5,
(float)(ps.next()%ar.Z)+0.5
);
v3s16 startp(orp.X, orp.Y, orp.Z);
startp += of;
MapNode airnode(CONTENT_AIR);
MapNode waternode(c_water_source);
MapNode lavanode(c_lava_source);
/*
Generate some tunnel starting from orp
*/
for(u16 j=0; j<cave.tunnel_routepoints; j++)
{
if(j%cave.dswitchint==0 && large_cave == false)
{
main_direction = v3f(
((float)(ps.next()%20)-(float)10)/10,
((float)(ps.next()%20)-(float)10)/30,
((float)(ps.next()%20)-(float)10)/10
);
main_direction *= (float)ps.range(0, 10)/10;
}
// Randomize size
s16 min_d = cave.min_tunnel_diameter;
s16 max_d = cave.max_tunnel_diameter;
s16 rs = ps.range(min_d, max_d);
// Every second section is rough
bool randomize_xz = (ps2.range(1,2) == 1);
v3s16 maxlen;
if(large_cave)
{
maxlen = v3s16(
rs*cave.part_max_length_rs,
rs*cave.part_max_length_rs/2,
rs*cave.part_max_length_rs
);
}
else
{
maxlen = v3s16(
rs*cave.part_max_length_rs,
ps.range(1, rs*cave.part_max_length_rs),
rs*cave.part_max_length_rs
);
}
v3f vec;
vec = v3f(
(float)(ps.next()%(maxlen.X*1))-(float)maxlen.X/2,
(float)(ps.next()%(maxlen.Y*1))-(float)maxlen.Y/2,
(float)(ps.next()%(maxlen.Z*1))-(float)maxlen.Z/2
);
// Jump downward sometimes
if(!large_cave && ps.range(0,12) == 0)
{
vec = v3f(
(float)(ps.next()%(maxlen.X*1))-(float)maxlen.X/2,
(float)(ps.next()%(maxlen.Y*2))-(float)maxlen.Y*2/2,
(float)(ps.next()%(maxlen.Z*1))-(float)maxlen.Z/2
);
}
/*if(large_cave){
v3f p = orp + vec;
s16 h = find_ground_level_clever(vmanip,
v2s16(p.X, p.Z), ndef);
route_y_min = h - rs/3;
route_y_max = h + rs;
}*/
vec += main_direction;
v3f rp = orp + vec;
if(rp.X < 0)
rp.X = 0;
else if(rp.X >= ar.X)
rp.X = ar.X-1;
if(rp.Y < route_y_min)
rp.Y = route_y_min;
else if(rp.Y >= route_y_max)
rp.Y = route_y_max-1;
if(rp.Z < 0)
rp.Z = 0;
else if(rp.Z >= ar.Z)
rp.Z = ar.Z-1;
vec = rp - orp;
float veclen = vec.getLength();
// As odd as it sounds, veclen is *exactly*
// 0.0 sometimes, causing a FPE
if (veclen == 0.0)
veclen = 1.0;
for(float f=0; f<1.0; f+=1.0/veclen)
{
v3f fp = orp + vec * f;
fp.X += 0.1*ps.range(-10,10);
fp.Z += 0.1*ps.range(-10,10);
v3s16 cp(fp.X, fp.Y, fp.Z);
s16 d0 = -rs/2;
s16 d1 = d0 + rs;
if(randomize_xz){
d0 += ps.range(-1,1);
d1 += ps.range(-1,1);
}
for(s16 z0=d0; z0<=d1; z0++)
{
s16 si = rs/2 - MYMAX(0, abs(z0)-rs/7-1);
for(s16 x0=-si-ps.range(0,1); x0<=si-1+ps.range(0,1); x0++)
{
s16 maxabsxz = MYMAX(abs(x0), abs(z0));
s16 si2 = rs/2 - MYMAX(0, maxabsxz-rs/7-1);
for(s16 y0=-si2; y0<=si2; y0++)
{
/*// Make better floors in small caves
if(y0 <= -rs/2 && rs<=7)
continue;*/
if (cave.large_cave_is_flat) {
// Make large caves not so tall
if (rs > 7 && abs(y0) >= rs/3)
continue;
}
s16 z = cp.Z + z0;
s16 y = cp.Y + y0;
s16 x = cp.X + x0;
v3s16 p(x,y,z);
p += of;
if(vm->m_area.contains(p) == false)
continue;
u32 i = vm->m_area.index(p);
if(large_cave) {
if (cave.flooded && full_node_min.Y < water_level &&
full_node_max.Y > water_level) {
if (p.Y <= water_level)
vm->m_data[i] = waternode;
else
vm->m_data[i] = airnode;
} else if (cave.flooded && full_node_max.Y < water_level) {
if (p.Y < startp.Y - 2)
vm->m_data[i] = lavanode;
else
vm->m_data[i] = airnode;
} else {
vm->m_data[i] = airnode;
}
} else {
// Don't replace air or water or lava or ignore
if (vm->m_data[i].getContent() == CONTENT_IGNORE ||
vm->m_data[i].getContent() == CONTENT_AIR ||
vm->m_data[i].getContent() == c_water_source ||
vm->m_data[i].getContent() == c_lava_source)
continue;
vm->m_data[i] = airnode;
// Set tunnel flag
vm->m_flags[i] |= VMANIP_FLAG_CAVE;
}
}
}
}
}
orp = rp;
}
}
}
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