void MapgenV7::generateBaseTerrain(s16 *stone_surface_min_y, s16 *stone_surface_max_y)
{
MapNode n_air(CONTENT_AIR);
MapNode n_stone(c_stone);
MapNode n_water(c_water_source);
MapNode n_ice(c_ice);
v3s16 em = vm->m_area.getExtent();
s16 surface_min_y = MAX_MAP_GENERATION_LIMIT;
s16 surface_max_y = -MAX_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++) {
float surface_height = baseTerrainLevelFromMap(index);
s16 surface_y = (s16)surface_height;
heightmap[index] = surface_y;
ridge_heightmap[index] = surface_y;
if (surface_y < surface_min_y)
surface_min_y = surface_y;
if (surface_y > surface_max_y)
surface_max_y = surface_y;
s16 heat = m_emerge->env->m_use_weather ? m_emerge->env->getServerMap().updateBlockHeat(m_emerge->env, v3POS(x,node_max.Y,z), nullptr, &heat_cache) : 0;
u32 i = vm->m_area.index(x, node_min.Y - 1, z);
for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
if (y <= surface_y) {
int index3 = (z - node_min.Z) * zstride +
(y - node_min.Y + 1) * ystride +
(x - node_min.X);
vm->m_data[i] = layers_get(index3);
}
else if (y <= water_level)
{
vm->m_data[i] = (heat < 0 && y > heat/3) ? n_ice : n_water;
if (liquid_pressure && y <= 0)
vm->m_data[i].addLevel(m_emerge->ndef, water_level - y, 1);
}
else
vm->m_data[i] = n_air;
}
vm->m_area.add_y(em, i, 1);
}
}
*stone_surface_min_y = surface_min_y;
*stone_surface_max_y = surface_max_y;
}
int MapgenV5::generateBaseTerrain()
{
u32 index = 0;
u32 index2d = 0;
int stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
noise_factor->perlinMap2D(node_min.X, node_min.Z);
noise_height->perlinMap2D(node_min.X, node_min.Z);
noise_ground->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
for (s16 z=node_min.Z; z<=node_max.Z; z++) {
for (s16 y=node_min.Y - 1; y<=node_max.Y + 1; y++) {
u32 vi = vm->m_area.index(node_min.X, y, z);
for (s16 x=node_min.X; x<=node_max.X; x++, vi++, index++, index2d++) {
if (vm->m_data[vi].getContent() != CONTENT_IGNORE)
continue;
float f = 0.55 + noise_factor->result[index2d];
if (f < 0.01)
f = 0.01;
else if (f >= 1.0)
f *= 1.6;
float h = noise_height->result[index2d];
if (noise_ground->result[index] * f < y - h) {
if (y <= water_level) {
vm->m_data[vi] = MapNode(c_water_source);
if (liquid_pressure && y <= 0)
vm->m_data[vi].addLevel(m_emerge->ndef, water_level - y, 1);
}
else
vm->m_data[vi] = MapNode(CONTENT_AIR);
} else {
vm->m_data[vi] = layers_get(index);
if (y > stone_surface_max_y)
stone_surface_max_y = y;
}
}
index2d -= ystride;
}
index2d += ystride;
}
return stone_surface_max_y;
}
int Mapgen_features::float_islands_generate(const v3POS & node_min, const v3POS & node_max, int min_y, MMVManip *vm) {
int generated = 0;
if (node_min.Y < min_y) return generated;
// originally from http://forum.minetest.net/viewtopic.php?id=4776
float RAR = 0.8 * farscale(0.4, node_min.Y); // 0.4; // Island rarity in chunk layer. -0.4 = thick layer with holes, 0 = 50%, 0.4 = desert rarity, 0.7 = very rare.
float AMPY = 24; // 24; // Amplitude of island centre y variation.
float TGRAD = 24; // 24; // Noise gradient to create top surface. Tallness of island top.
float BGRAD = 24; // 24; // Noise gradient to create bottom surface. Tallness of island bottom.
v3POS p0(node_min.X, node_min.Y, node_min.Z);
float xl = node_max.X - node_min.X;
float yl = node_max.Y - node_min.Y;
float zl = node_max.Z - node_min.Z;
u32 zstride = xl + y_offset;
float midy = node_min.Y + yl * 0.5;
u32 index = 0;
for (int z1 = 0; z1 <= zl; ++z1)
for (int y1 = 0; y1 <= yl; ++y1)
for (int x1 = 0; x1 <= xl; ++x1, ++index) {
int y = y1 + node_min.Y;
u32 index2d = z1 * zstride + x1;
float noise3 = noise_float_islands3->result[index2d];
float pmidy = midy + noise3 / 1.5 * AMPY;
float noise1 = noise_float_islands1->result[index];
float offset = y > pmidy ? (y - pmidy) / TGRAD : (pmidy - y) / BGRAD;
float noise1off = noise1 - offset - RAR;
if (noise1off > 0 && noise1off < 0.7) {
float noise2 = noise_float_islands2->result[index];
if (noise2 - noise1off > -0.7) {
v3POS p = p0 + v3POS(x1, y1, z1);
u32 i = vm->m_area.index(p);
if (!vm->m_area.contains(i))
continue;
// Cancel if not air
if (vm->m_data[i].getContent() != CONTENT_AIR)
continue;
vm->m_data[i] = layers_get(index);
++generated;
}
}
}
return generated;
}
int MapgenIndev::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);
MapNode n_ice(c_ice), n_dirt(c_dirt),n_sand(c_sand), n_gravel(c_gravel), n_lava_source(c_lava_source);
int stone_surface_max_y = -MAX_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;
auto bt = getBiome(index, v3POS(x, surface_y, z));
s16 heat = m_emerge->env->m_use_weather ? m_emerge->env->getServerMap().updateBlockHeat(m_emerge->env, v3POS(x,node_max.Y,z), nullptr, &heat_cache) : 0;
// Fill ground with stone
v3POS 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]) {
if (y <= surface_y) {
int index3 = (z - node_min.Z) * zstride + (y - node_min.Y) * ystride + (x - node_min.X) * xstride;
if (cave_noise_threshold && noise_cave_indev->result[index3] > cave_noise_threshold) {
vm->m_data[i] = n_air;
} else {
auto n = (y > water_level - surface_y && bt == BT_DESERT) ? n_desert_stone : layers_get(index3);
bool protect = n.getContent() != CONTENT_AIR;
if (cave_noise_threshold && noise_cave_indev->result[index3] > cave_noise_threshold - 50) {
vm->m_data[i] = protect ? n_stone : n; //cave shell without layers
protect = true;
} else {
vm->m_data[i] = n;
}
if (protect)
vm->m_flags[i] |= VOXELFLAG_CHECKED2; // no cave liquid
}
} else if (y <= water_level) {
vm->m_data[i] = (heat < 0 && y > heat/3) ? n_ice : n_water_source;
if (liquid_pressure && y <= 0)
vm->m_data[i].addLevel(m_emerge->ndef, water_level - y, 1);
} else {
vm->m_data[i] = n_air;
}
}
vm->m_area.add_y(em, i, 1);
}
}
return stone_surface_max_y;
}
int MapgenMath::generateTerrain() {
MapNode n_ice(c_ice);
u32 index = 0;
v3POS em = vm->m_area.getExtent();
auto zstride_1d = csize.X * (csize.Y + 1);
/* debug
v3f vec0 = (v3f(node_min.X, node_min.Y, node_min.Z) - center) * scale ;
errorstream << " X=" << node_min.X << " Y=" << node_min.Y << " Z=" << node_min.Z
//<< " N="<< mengersponge(vec0.X, vec0.Y, vec0.Z, distance, iterations)
<< " N=" << (*func)(vec0.X, vec0.Y, vec0.Z, distance, iterations)
<< " Sc=" << scale << " gen=" << params["generator"].asString() << " J=" << Json::FastWriter().write(params) << std::endl;
*/
//errorstream << Json::StyledWriter().write( mg_params->params ).c_str()<< std::endl;
//errorstream << " iterations="<<iterations<< " scale="<<scale <<" invert="<<invert<< std::endl;
#if USE_MANDELBULBER
v3f vec0(node_min.X, node_min.Y, node_min.Z);
vec0 = (vec0 - center) * scale;
/*
errorstream << " X=" << node_min.X << " Y=" << node_min.Y << " Z=" << node_min.Z
<< " N=" << Compute<normal_mode>(CVector3(vec0.X, vec0.Y, vec0.Z), mg_params->par)
//<<" F="<< Compute<fake_AO>(CVector3(node_min.X,node_min.Y,node_min.Z), par)
//<<" L="<<node_min.getLength()<< " -="<<node_min.getLength() - Compute<normal_mode>(CVector3(node_min.X,node_min.Y,node_min.Z), par)
<< " Sc=" << scale << " internal=" << internal
<< std::endl;
*/
#endif
double d = 0;
for (s16 z = node_min.Z; z <= node_max.Z; z++) {
for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
s16 heat = m_emerge->env->m_use_weather ? m_emerge->env->getServerMap().updateBlockHeat(m_emerge->env, v3POS(x,node_max.Y,z), nullptr, &heat_cache) : 0;
u32 i = vm->m_area.index(x, node_min.Y, z);
for (s16 y = node_min.Y; y <= node_max.Y; y++) {
v3f vec = (v3f(x, y, z) - center) * scale ;
if (invert_xy)
std::swap(vec.X, vec.Y);
if (invert_yz)
std::swap(vec.Y, vec.Z);
#if USE_MANDELBULBER
if (!internal)
d = Compute<normal_mode>(CVector3(vec.X, vec.Y, vec.Z), mg_params->par);
else
#endif
if (internal)
d = (*func)(vec.X, vec.Y, vec.Z, scale.X, iterations);
if ((!invert && d > 0) || (invert && d == 0) ) {
if (!vm->m_data[i]) {
//vm->m_data[i] = (y > water_level + biome->filler) ?
// MapNode(biome->c_filler) : n_stone;
if (invert) {
int index3 = (z - node_min.Z) * zstride_1d +
(y - node_min.Y) * ystride +
(x - node_min.X);
vm->m_data[i] = Mapgen_features::layers_get(index3);
} else {
vm->m_data[i] = layers_get(d, result_max);
}
// vm->m_data[i] = (y > water_level + biome->filler) ?
// MapNode(biome->c_filler) : layers_get(d, result_max);
}
} else if (y <= water_level) {
vm->m_data[i] = (heat < 0 && y > heat/3) ? n_ice : n_water;
} else {
vm->m_data[i] = n_air;
}
vm->m_area.add_y(em, i, 1);
}
}
}
return 0;
}
