void MapgenV6::placeTreesAndJungleGrass()
{
//TimeTaker t("placeTrees");
PseudoRandom grassrandom(blockseed + 53);
content_t c_sand = ndef->getId("mapgen_sand");
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
);
// Get biome at center position of part of division
BiomeV6Type bt = getBiome(v3POS(p2d_center.X, node_min.Y, p2d_center.Y));
// Amount of trees
float humidity = getHumidity(v3POS(p2d_center.X, node_max.Y, p2d_center.Y));
s32 tree_count;
if (bt == BT_JUNGLE || bt == BT_TAIGA || bt == BT_NORMAL) {
tree_count = area * getTreeAmount(p2d_center) * ((humidity + 1)/2.0);
if (bt == BT_JUNGLE)
tree_count *= 4;
} else {
tree_count = 0;
}
if (node_max.Y < water_level)
tree_count /= 2;
// Add jungle grass
if (bt == BT_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);
/* wtf
int mapindex = central_area_size.X * (z - node_min.Z)
+ (x - node_min.X);
s16 y = heightmap[mapindex];
*/
s16 y = findGroundLevelFull(v2s16(x, z));
if (y < water_level)
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 (s32 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);
/* wtf
int mapindex = central_area_size.X * (z - node_min.Z)
+ (x - node_min.X);
s16 y = heightmap[mapindex];
*/
s16 y = findGroundLevelFull(v2s16(x, z));
// Don't make a tree under water level
// Don't make a tree so high that it doesn't fit
if (y > node_max.Y - 6)
continue;
v3s16 p(x, y, z);
// Trees grow only on mud and grass and snowblock
{
u32 i = vm->m_area.index(p);
content_t c = vm->m_data[i].getContent();
if (c != c_dirt &&
c != c_dirt_with_grass &&
c != c_dirt_with_snow &&
c != c_snowblock &&
(y >= water_level || c != c_sand))
continue;
}
p.Y++;
// Make a tree
if (y < water_level) {
if (y < water_level - 20) // do not spawn trees in lakes
treegen::make_cavetree(*vm, p, bt == BT_JUNGLE, ndef, myrand());
} else if (bt == BT_JUNGLE) {
treegen::make_jungletree(*vm, p, ndef, myrand());
} else if (bt == BT_TAIGA) {
treegen::make_pine_tree(*vm, p - v3s16(0, 1, 0), ndef, myrand());
} else if (bt == BT_NORMAL) {
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());
}
size_t Decoration::placeDeco(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax)
{
PseudoRandom ps(blockseed + 53);
int carea_size = nmax.X - nmin.X + 1;
// Divide area into parts
if (carea_size % sidelen) {
errorstream << "Decoration::placeDeco: chunk size is not divisible by "
"sidelen; setting sidelen to " << carea_size << std::endl;
sidelen = carea_size;
}
s16 divlen = carea_size / sidelen;
int area = sidelen * sidelen;
for (s16 z0 = 0; z0 < divlen; z0++)
for (s16 x0 = 0; x0 < divlen; x0++) {
v2s16 p2d_center( // Center position of part of division
nmin.X + sidelen / 2 + sidelen * x0,
nmin.Z + sidelen / 2 + sidelen * z0
);
v2s16 p2d_min( // Minimum edge of part of division
nmin.X + sidelen * x0,
nmin.Z + sidelen * z0
);
v2s16 p2d_max( // Maximum edge of part of division
nmin.X + sidelen + sidelen * x0 - 1,
nmin.Z + sidelen + sidelen * z0 - 1
);
// Amount of decorations
float nval = (flags & DECO_USE_NOISE) ?
NoisePerlin2D(&np, p2d_center.X, p2d_center.Y, mapseed) :
fill_ratio;
u32 deco_count = area * MYMAX(nval, 0.f);
for (u32 i = 0; i < deco_count; i++) {
s16 x = ps.range(p2d_min.X, p2d_max.X);
s16 z = ps.range(p2d_min.Y, p2d_max.Y);
int mapindex = carea_size * (z - nmin.Z) + (x - nmin.X);
s16 y = mg->heightmap ?
mg->heightmap[mapindex] :
mg->findGroundLevel(v2s16(x, z), nmin.Y, nmax.Y);
if (y < nmin.Y || y > nmax.Y ||
y < y_min || y > y_max)
continue;
if (y + getHeight() >= mg->vm->m_area.MaxEdge.Y) {
continue;
#if 0
printf("Decoration at (%d %d %d) cut off\n", x, y, z);
//add to queue
JMutexAutoLock cutofflock(cutoff_mutex);
cutoffs.push_back(CutoffData(x, y, z, height));
#endif
}
if (mg->biomemap) {
std::set<u8>::iterator iter;
if (!biomes.empty()) {
iter = biomes.find(mg->biomemap[mapindex]);
if (iter == biomes.end())
continue;
}
}
v3s16 pos(x, y, z);
if (generate(mg->vm, &ps, pos))
mg->gennotify.addEvent(GENNOTIFY_DECORATION, pos, index);
}
}
return 0;
}
void Decoration::placeDeco(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax) {
PseudoRandom ps(blockseed + 53);
int carea_size = nmax.X - nmin.X + 1;
// Divide area into parts
if (carea_size % sidelen) {
errorstream << "Decoration::placeDeco: chunk size is not divisible by "
"sidelen; setting sidelen to " << carea_size << std::endl;
sidelen = carea_size;
}
s16 divlen = carea_size / sidelen;
int area = sidelen * sidelen;
for (s16 z0 = 0; z0 < divlen; z0++)
for (s16 x0 = 0; x0 < divlen; x0++) {
v2s16 p2d_center( // Center position of part of division
nmin.X + sidelen / 2 + sidelen * x0,
nmin.Z + sidelen / 2 + sidelen * z0
);
v2s16 p2d_min( // Minimum edge of part of division
nmin.X + sidelen * x0,
nmin.Z + sidelen * z0
);
v2s16 p2d_max( // Maximum edge of part of division
nmin.X + sidelen + sidelen * x0 - 1,
nmin.Z + sidelen + sidelen * z0 - 1
);
// Amount of decorations
float nval = np ?
NoisePerlin2D(np, p2d_center.X, p2d_center.Y, mapseed) :
fill_ratio;
u32 deco_count = area * MYMAX(nval, 0.f);
for (u32 i = 0; i < deco_count; i++) {
s16 x = ps.range(p2d_min.X, p2d_max.X);
s16 z = ps.range(p2d_min.Y, p2d_max.Y);
int mapindex = carea_size * (z - nmin.Z) + (x - nmin.X);
s16 y = mg->heightmap ?
mg->heightmap[mapindex] :
mg->findGroundLevel(v2s16(x, z), nmin.Y, nmax.Y);
if (y < nmin.Y || y > nmax.Y)
continue;
int height = getHeight();
int max_y = nmax.Y;// + MAP_BLOCKSIZE - 1;
if (y + 1 + height > max_y) {
continue;
#if 0
printf("Decoration at (%d %d %d) cut off\n", x, y, z);
//add to queue
JMutexAutoLock cutofflock(cutoff_mutex);
cutoffs.push_back(CutoffData(x, y, z, height));
#endif
}
if (mg->biomemap) {
std::set<u8>::iterator iter;
if (biomes.size()) {
iter = biomes.find(mg->biomemap[mapindex]);
if (iter == biomes.end())
continue;
}
}
generate(mg, &ps, max_y, v3s16(x, y, z));
}
}
}
void MapgenV5::actuallyGenerate()
{
ManualMapVoxelManipulator &vmanip = *vm;
v2s16 p2d_center(node_min.X+MAP_BLOCKSIZE/2, node_min.Z+MAP_BLOCKSIZE/2);
/*
Get average ground level from noise
*/
s16 minimum_groundlevel = (s16)get_sector_minimum_ground_level(
seed, node_min, node_max);
// Minimum amount of ground above the top of the central block
s16 minimum_ground_depth = minimum_groundlevel - node_max.Y;
s16 maximum_groundlevel = (s16)get_sector_maximum_ground_level(
seed, node_min, node_max, 1);
// Maximum amount of ground above the bottom of the central block
s16 maximum_ground_depth = maximum_groundlevel - node_min.Y;
#if 0
/*
Special case for high air or water: Just fill with air and water.
*/
if(maximum_ground_depth < -20)
{
for(s16 x=node_min.X; x<=node_max.X; x++)
for(s16 z=node_min.Z; z<=node_max.Z; z++)
{
// Node position
v2s16 p2d(x,z);
{
// Use fast index incrementing
v3s16 em = vmanip.m_area.getExtent();
u32 i = vmanip.m_area.index(v3s16(p2d.X, node_min.Y, p2d.Y));
for(s16 y=node_min.Y; y<=node_max.Y; y++)
{
// Only modify places that have no content
if(vmanip.m_data[i].getContent() == CONTENT_IGNORE)
{
if(y <= WATER_LEVEL)
vmanip.m_data[i] = MapNode(c_water_source);
else
vmanip.m_data[i] = MapNode(CONTENT_AIR);
}
vmanip.m_area.add_y(em, i, 1);
}
}
}
// We're done
return;
}
#endif
/*
If block is deep underground, this is set to true and ground
density noise is not generated, for speed optimization.
*/
bool all_is_ground_except_caves = (minimum_ground_depth > 40);
/*
Create a block-specific seed
*/
u32 blockseed = (u32)(seed%0x100000000ULL) + full_node_min.Z*38134234
+ full_node_min.Y*42123 + full_node_min.X*23;
/*
Make some 3D noise
*/
//OldNoiseBuffer noisebuf1;
//OldNoiseBuffer noisebuf2;
OldNoiseBuffer noisebuf_cave;
OldNoiseBuffer noisebuf_ground;
OldNoiseBuffer noisebuf_ground_crumbleness;
OldNoiseBuffer noisebuf_ground_wetness;
{
v3f minpos_f(node_min.X, node_min.Y, node_min.Z);
v3f maxpos_f(node_max.X, node_max.Y, node_max.Z);
//TimeTaker timer("noisebuf.create");
/*
Cave noise
*/
#if 1
noisebuf_cave.create(get_cave_noise1_params(seed),
minpos_f.X, minpos_f.Y, minpos_f.Z,
maxpos_f.X, maxpos_f.Y, maxpos_f.Z,
2, 2, 2);
noisebuf_cave.multiply(get_cave_noise2_params(seed));
#endif
/*
Ground noise
*/
// Sample length
v3f sl = v3f(4.0, 4.0, 4.0);
/*
Density noise
*/
if(all_is_ground_except_caves == false)
//noisebuf_ground.create(seed+983240, 6, 0.60, false,
noisebuf_ground.create(get_ground_noise1_params(seed),
minpos_f.X, minpos_f.Y, minpos_f.Z,
maxpos_f.X, maxpos_f.Y, maxpos_f.Z,
sl.X, sl.Y, sl.Z);
/*
Ground property noise
*/
sl = v3f(2.5, 2.5, 2.5);
noisebuf_ground_crumbleness.create(
get_ground_crumbleness_params(seed),
minpos_f.X, minpos_f.Y, minpos_f.Z,
maxpos_f.X, maxpos_f.Y+5, maxpos_f.Z,
sl.X, sl.Y, sl.Z);
noisebuf_ground_wetness.create(
get_ground_wetness_params(seed),
minpos_f.X, minpos_f.Y, minpos_f.Z,
maxpos_f.X, maxpos_f.Y+5, maxpos_f.Z,
sl.X, sl.Y, sl.Z);
}
/*
Make base ground level
*/
for(s16 x=node_min.X; x<=node_max.X; x++)
for(s16 z=node_min.Z; z<=node_max.Z; z++)
{
// Node position
v2s16 p2d(x,z);
{
// Use fast index incrementing
v3s16 em = vmanip.m_area.getExtent();
u32 i = vmanip.m_area.index(v3s16(p2d.X, node_min.Y, p2d.Y));
for(s16 y=node_min.Y; y<=node_max.Y; y++)
{
// Only modify places that have no content
if(vmanip.m_data[i].getContent() == CONTENT_IGNORE)
{
// First priority: make air and water.
// This avoids caves inside water.
if(all_is_ground_except_caves == false
&& val_is_ground(noisebuf_ground.get(x,y,z),
v3s16(x,y,z), seed) == false)
{
if(y <= WATER_LEVEL)
vmanip.m_data[i] = MapNode(c_water_source);
else
vmanip.m_data[i] = MapNode(CONTENT_AIR);
}
else if(noisebuf_cave.get(x,y,z) > CAVE_NOISE_THRESHOLD)
vmanip.m_data[i] = MapNode(CONTENT_AIR);
else
vmanip.m_data[i] = MapNode(c_stone);
}
vmanip.m_area.add_y(em, i, 1);
}
}
}
/*
Add mud and sand and others underground (in place of stone)
*/
for(s16 x=node_min.X; x<=node_max.X; x++)
for(s16 z=node_min.Z; z<=node_max.Z; z++)
{
// Node position
v2s16 p2d(x,z);
{
// Use fast index incrementing
v3s16 em = vmanip.m_area.getExtent();
u32 i = vmanip.m_area.index(v3s16(p2d.X, node_max.Y, p2d.Y));
for(s16 y=node_max.Y; y>=node_min.Y; y--)
{
if(vmanip.m_data[i].getContent() == c_stone)
{
if(noisebuf_ground_crumbleness.get(x,y,z) > 1.3)
{
if(noisebuf_ground_wetness.get(x,y,z) > 0.0)
vmanip.m_data[i] = MapNode(c_dirt);
else
vmanip.m_data[i] = MapNode(c_sand);
}
else if(noisebuf_ground_crumbleness.get(x,y,z) > 0.7)
{
if(noisebuf_ground_wetness.get(x,y,z) < -0.6)
vmanip.m_data[i] = MapNode(c_gravel);
}
else if(noisebuf_ground_crumbleness.get(x,y,z) <
-3.0 + MYMIN(0.1 * sqrt((float)MYMAX(0, -y)), 1.5))
{
vmanip.m_data[i] = MapNode(c_lava_source);
// TODO: Is this needed?
/*for(s16 x1=-1; x1<=1; x1++)
for(s16 y1=-1; y1<=1; y1++)
for(s16 z1=-1; z1<=1; z1++)
data->transforming_liquid.push_back(
v3s16(p2d.X+x1, y+y1, p2d.Y+z1));*/
}
}
vmanip.m_area.add_y(em, i, -1);
}
}
}
// Add dungeons
{
DungeonParams dp;
dp.np_rarity = nparams_dungeon_rarity;
dp.np_density = nparams_dungeon_density;
dp.np_wetness = nparams_dungeon_wetness;
dp.c_water = c_water_source;
// TODO
//if (getBiome(0, v2s16(node_min.X, node_min.Z)) == BT_NORMAL) {
if (1) {
dp.c_cobble = c_cobble;
dp.c_moss = c_mossycobble;
dp.c_stair = c_stair_cobble;
dp.diagonal_dirs = false;
dp.mossratio = 3.0;
dp.holesize = v3s16(1, 2, 1);
dp.roomsize = v3s16(0, 0, 0);
dp.notifytype = GENNOTIFY_DUNGEON;
} /*else {
dp.c_cobble = c_sandbrick;
dp.c_moss = c_sandbrick; // should make this 'cracked sandstone' later
dp.c_stair = c_stair_sandstone;
dp.diagonal_dirs = true;
dp.mossratio = 0.0;
dp.holesize = v3s16(2, 3, 2);
dp.roomsize = v3s16(2, 5, 2);
dp.notifytype = GENNOTIFY_TEMPLE;
}*/
DungeonGen dgen(this, &dp);
dgen.generate(blockseed, full_node_min, full_node_max);
}
/*
If close to ground level
*/
//if(abs(approx_ground_depth) < 30)
if(minimum_ground_depth < 5 && maximum_ground_depth > -5)
{
/*
Add grass and mud
*/
for(s16 x=node_min.X; x<=node_max.X; x++)
for(s16 z=node_min.Z; z<=node_max.Z; z++)
{
// Node position
v2s16 p2d(x,z);
{
bool possibly_have_sand = get_have_sand(seed, p2d);
bool have_sand = false;
u32 current_depth = 0;
bool air_detected = false;
bool water_detected = false;
// Use fast index incrementing
s16 start_y = node_max.Y+2;
v3s16 em = vmanip.m_area.getExtent();
u32 i = vmanip.m_area.index(v3s16(p2d.X, start_y, p2d.Y));
for(s16 y=start_y; y>=node_min.Y-3; y--)
{
if(vmanip.m_data[i].getContent() == c_water_source)
water_detected = true;
if(vmanip.m_data[i].getContent() == CONTENT_AIR)
air_detected = true;
if((vmanip.m_data[i].getContent() == c_stone
|| vmanip.m_data[i].getContent() == c_dirt_with_grass
|| vmanip.m_data[i].getContent() == c_dirt
|| vmanip.m_data[i].getContent() == c_sand
|| vmanip.m_data[i].getContent() == c_gravel
) && (air_detected || water_detected))
{
if(current_depth == 0 && y <= WATER_LEVEL+2
&& possibly_have_sand)
have_sand = true;
if(current_depth < 4)
{
if(have_sand)
vmanip.m_data[i] = MapNode(c_sand);
#if 1
else if(current_depth==0 && !water_detected
&& y >= WATER_LEVEL && air_detected)
vmanip.m_data[i] = MapNode(c_dirt_with_grass);
#endif
else
vmanip.m_data[i] = MapNode(c_dirt);
}
else
{
if(vmanip.m_data[i].getContent() == c_dirt
|| vmanip.m_data[i].getContent() == c_dirt_with_grass)
vmanip.m_data[i] = MapNode(c_stone);
}
current_depth++;
if(current_depth >= 8)
break;
}
else if(current_depth != 0)
break;
vmanip.m_area.add_y(em, i, -1);
}
}
}
}
}
void MapgenV6::placeTreesAndJungleGrass() {
//TimeTaker t("placeTrees");
PseudoRandom grassrandom(blockseed + 53);
content_t c_sand = ndef->getId("mapgen_sand");
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 = 0;
bool is_jungle = false;
if (flags & MGV6_JUNGLES) {
humidity = getHumidity(p2d_center);
if (humidity > 0.75) {
is_jungle = true;
tree_count *= 4;
}
}
if (node_max.Y < water_level)
tree_count /= 2;
// 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 = findGroundLevelFull(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 = findGroundLevelFull(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 > 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 &&
(y >= water_level || n->getContent() != c_sand))
continue;
}
p.Y++;
// Make a tree
if (y < water_level) {
if (y < water_level - 20) // do not spawn trees in lakes
treegen::make_cavetree(*vm, p, is_jungle, ndef, myrand());
}
else 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());
}
size_t Decoration::placeDeco(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax)
{
PcgRandom ps(blockseed + 53);
int carea_size = nmax.X - nmin.X + 1;
// Divide area into parts
// If chunksize is changed it may no longer be divisable by sidelen
if (carea_size % sidelen)
sidelen = carea_size;
s16 divlen = carea_size / sidelen;
int area = sidelen * sidelen;
for (s16 z0 = 0; z0 < divlen; z0++)
for (s16 x0 = 0; x0 < divlen; x0++) {
v2s16 p2d_center( // Center position of part of division
nmin.X + sidelen / 2 + sidelen * x0,
nmin.Z + sidelen / 2 + sidelen * z0
);
v2s16 p2d_min( // Minimum edge of part of division
nmin.X + sidelen * x0,
nmin.Z + sidelen * z0
);
v2s16 p2d_max( // Maximum edge of part of division
nmin.X + sidelen + sidelen * x0 - 1,
nmin.Z + sidelen + sidelen * z0 - 1
);
// Amount of decorations
float nval = (flags & DECO_USE_NOISE) ?
NoisePerlin2D(&np, p2d_center.X, p2d_center.Y, mapseed) :
fill_ratio;
u32 deco_count = 0;
float deco_count_f = (float)area * nval;
if (deco_count_f >= 1.f) {
deco_count = deco_count_f;
} else if (deco_count_f > 0.f) {
// For low density decorations calculate a chance for 1 decoration
if (ps.range(1000) <= deco_count_f * 1000.f)
deco_count = 1;
}
for (u32 i = 0; i < deco_count; i++) {
s16 x = ps.range(p2d_min.X, p2d_max.X);
s16 z = ps.range(p2d_min.Y, p2d_max.Y);
int mapindex = carea_size * (z - nmin.Z) + (x - nmin.X);
s16 y = -MAX_MAP_GENERATION_LIMIT;
if (flags & DECO_LIQUID_SURFACE)
y = mg->findLiquidSurface(v2s16(x, z), nmin.Y, nmax.Y);
else if (mg->heightmap)
y = mg->heightmap[mapindex];
else
y = mg->findGroundLevel(v2s16(x, z), nmin.Y, nmax.Y);
if (y < nmin.Y || y > nmax.Y ||
y < y_min || y > y_max)
continue;
if (y + getHeight() >= mg->vm->m_area.MaxEdge.Y) {
continue;
#if 0
printf("Decoration at (%d %d %d) cut off\n", x, y, z);
//add to queue
MutexAutoLock cutofflock(cutoff_mutex);
cutoffs.push_back(CutoffData(x, y, z, height));
#endif
}
if (mg->biomemap) {
std::set<u8>::iterator iter;
if (!biomes.empty()) {
iter = biomes.find(mg->biomemap[mapindex]);
if (iter == biomes.end())
continue;
}
}
v3s16 pos(x, y, z);
if (generate(mg->vm, &ps, pos))
mg->gennotify.addEvent(GENNOTIFY_DECORATION, pos, index);
}
}
return 0;
}
