예제 #1
0
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;

		BiomeV6Type bt = getBiome(v3POS(x, surface_y, 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_DESERT && getHaveBeach(index) &&
				surface_y + mud_add_amount <= water_level + 2) {
			addnode = n_sand;
		}

		if ((bt == BT_DESERT || bt == BT_TUNDRA) && 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;
		u32 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);
		}
	}
}
예제 #2
0
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;
}
예제 #3
0
int MapgenValleys::generateTerrain()
{
	MapNode n_air(CONTENT_AIR);
	MapNode n_river_water(c_river_water_source);
	MapNode n_sand(c_sand);
	MapNode n_stone(c_stone);
	MapNode n_water(c_water_source);

	v3s16 em = vm->m_area.getExtent();
	s16 surface_max_y = -MAX_MAP_GENERATION_LIMIT;
	u32 index_2d = 0;

	for (s16 z = node_min.Z; z <= node_max.Z; z++)
	for (s16 x = node_min.X; x <= node_max.X; x++, index_2d++) {
		s16 river_y = floor(noise_rivers->result[index_2d]);
		s16 surface_y = floor(noise_terrain_height->result[index_2d]);
		float slope = noise_inter_valley_slope->result[index_2d];

		heightmap[index_2d] = surface_y;

		if (surface_y > surface_max_y)
			surface_max_y = surface_y;

		u32 index_3d = (z - node_min.Z) * zstride + (x - node_min.X);
		u32 index_data = vm->m_area.index(x, node_min.Y - 1, z);

		// Mapgens concern themselves with stone and water.
		for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
			float fill = 0.f;
			fill = noise_inter_valley_fill->result[index_3d];

			if (vm->m_data[index_data].getContent() == CONTENT_IGNORE) {
				bool river = (river_y > surface_y);

				if (river && y == surface_y) {
					// river bottom
					vm->m_data[index_data] = n_sand;
				} else if (river && y <= surface_y) {
					// ground
					vm->m_data[index_data] = n_stone;
				} else if (river && y < river_y) {
					// river
					vm->m_data[index_data] = n_river_water;
				} else if ((!river) && myround(fill * slope) >= y - surface_y) {
					// ground
					vm->m_data[index_data] = n_stone;
					heightmap[index_2d] = surface_max_y = y;
				} else if (y <= water_level) {
					// sea
					vm->m_data[index_data] = n_water;
				} else {
					vm->m_data[index_data] = n_air;
				}
			}

			vm->m_area.add_y(em, index_data, 1);
			index_3d += ystride;
		}

		// Although the original valleys adjusts humidity by distance
		// from seawater, this causes problems with the default biomes.
		// Adjust only by freshwater proximity.
		const float humidity_offset = 0.8f;  // derived by testing
		if (humid_rivers)
			noise_humidity->result[index_2d] *= (1 + pow(0.5f, MYMAX((surface_max_y
					- noise_rivers->result[index_2d]) / 3.f, 0.f))) * humidity_offset;

		// Assign the heat adjusted by altitude.
		if (use_altitude_chill && surface_max_y > 0)
			noise_heat->result[index_2d] *=
				pow(0.5f, (surface_max_y - altitude_chill / 3.f) / altitude_chill);
	}

	return surface_max_y;
}
예제 #4
0
int MapgenValleys::generateTerrain()
{
	// Raising this reduces the rate of evaporation.
	static const float evaporation = 300.f;
	// from the lua
	static const float humidity_dropoff = 4.f;
	// constant to convert altitude chill (compatible with lua) to heat
	static const float alt_to_heat = 20.f;
	// humidity reduction by altitude
	static const float alt_to_humid = 10.f;

	MapNode n_air(CONTENT_AIR);
	MapNode n_river_water(c_river_water_source);
	MapNode n_sand(c_sand);
	MapNode n_stone(c_stone);
	MapNode n_water(c_water_source);

	v3s16 em = vm->m_area.getExtent();
	s16 surface_max_y = -MAX_MAP_GENERATION_LIMIT;
	u32 index_2d = 0;

	for (s16 z = node_min.Z; z <= node_max.Z; z++)
	for (s16 x = node_min.X; x <= node_max.X; x++, index_2d++) {
		float river_y = noise_rivers->result[index_2d];
		float surface_y = noise_terrain_height->result[index_2d];
		float slope = noise_inter_valley_slope->result[index_2d];
		float t_heat = m_bgen->heatmap[index_2d];

		heightmap[index_2d] = -MAX_MAP_GENERATION_LIMIT;

		if (surface_y > surface_max_y)
			surface_max_y = ceil(surface_y);

		if (humid_rivers) {
			// Derive heat from (base) altitude. This will be most correct
			// at rivers, since other surface heights may vary below.
			if (use_altitude_chill && (surface_y > 0.f || river_y > 0.f))
				t_heat -= alt_to_heat * MYMAX(surface_y, river_y) / altitude_chill;

			// If humidity is low or heat is high, lower the water table.
			float delta = m_bgen->humidmap[index_2d] - 50.f;
			if (delta < 0.f) {
				float t_evap = (t_heat - 32.f) / evaporation;
				river_y += delta * MYMAX(t_evap, 0.08f);
			}
		}

		u32 index_3d = (z - node_min.Z) * zstride_1u1d + (x - node_min.X);
		u32 index_data = vm->m_area.index(x, node_min.Y - 1, z);

		// Mapgens concern themselves with stone and water.
		for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
			if (vm->m_data[index_data].getContent() == CONTENT_IGNORE) {
				float fill = noise_inter_valley_fill->result[index_3d];
				float surface_delta = (float)y - surface_y;
				bool river = y + 1 < river_y;

				if (fabs(surface_delta) <= 0.5f && y > water_level && river) {
					// river bottom
					vm->m_data[index_data] = n_sand;
				} else if (slope * fill > surface_delta) {
					// ground
					vm->m_data[index_data] = n_stone;
					if (y > heightmap[index_2d])
						heightmap[index_2d] = y;
					if (y > surface_max_y)
						surface_max_y = y;
				} else if (y <= water_level) {
					// sea
					vm->m_data[index_data] = n_water;
				} else if (river) {
					// river
					vm->m_data[index_data] = n_river_water;
				} else {
					vm->m_data[index_data] = n_air;
				}
			}

			vm->m_area.add_y(em, index_data, 1);
			index_3d += ystride;
		}

		// This happens if we're generating a chunk that doesn't
		// contain the terrain surface, in which case, we need
		// to set heightmap to a value outside of the chunk,
		// to avoid confusing lua mods that use heightmap.
		if (heightmap[index_2d] == -MAX_MAP_GENERATION_LIMIT) {
			s16 surface_y_int = myround(surface_y);
			if (surface_y_int > node_max.Y + 1 || surface_y_int < node_min.Y - 1) {
				// If surface_y is outside the chunk, it's good enough.
				heightmap[index_2d] = surface_y_int;
			} else {
				// If the ground is outside of this chunk, but surface_y
				// is within the chunk, give a value outside.
				heightmap[index_2d] = node_min.Y - 2;
			}
		}

		if (humid_rivers) {
			// Use base ground (water table) in a riverbed, to
			// avoid an unnatural rise in humidity.
			float t_alt = MYMAX(noise_rivers->result[index_2d], (float)heightmap[index_2d]);
			float humid = m_bgen->humidmap[index_2d];
			float water_depth = (t_alt - river_y) / humidity_dropoff;
			humid *= 1.f + pow(0.5f, MYMAX(water_depth, 1.f));

			// Reduce humidity with altitude (ignoring riverbeds).
			// This is similar to the lua version's seawater adjustment,
			// but doesn't increase the base humidity, which causes
			// problems with the default biomes.
			if (t_alt > 0.f)
				humid -= alt_to_humid * t_alt / altitude_chill;

			m_bgen->humidmap[index_2d] = humid;
		}

		// Assign the heat adjusted by any changed altitudes.
		// The altitude will change about half the time.
		if (use_altitude_chill) {
			// ground height ignoring riverbeds
			float t_alt = MYMAX(noise_rivers->result[index_2d], (float)heightmap[index_2d]);
			if (humid_rivers && heightmap[index_2d] == (s16)myround(surface_y))
				// The altitude hasn't changed. Use the first result.
				m_bgen->heatmap[index_2d] = t_heat;
			else if (t_alt > 0.f)
				m_bgen->heatmap[index_2d] -= alt_to_heat * t_alt / altitude_chill;
		}
	}

	return surface_max_y;
}
예제 #5
0
int MapgenValleys::generateTerrain()
{
	MapNode n_air(CONTENT_AIR);
	MapNode n_river_water(c_river_water_source);
	MapNode n_sand(c_sand);
	MapNode n_stone(c_stone);
	MapNode n_water(c_water_source);

	v3s16 em = vm->m_area.getExtent();
	s16 surface_max_y = -MAX_MAP_GENERATION_LIMIT;
	u32 index_2d = 0;

	for (s16 z = node_min.Z; z <= node_max.Z; z++)
	for (s16 x = node_min.X; x <= node_max.X; x++, index_2d++) {
		s16 river_y = floor(noise_rivers->result[index_2d]);
		s16 surface_y = floor(noise_terrain_height->result[index_2d]);
		float slope = noise_inter_valley_slope->result[index_2d];

		heightmap[index_2d] = surface_y;

		if (surface_y > surface_max_y)
			surface_max_y = surface_y;

		u32 index_3d = 0;
		if (!fast_terrain)
			index_3d = (z - node_min.Z) * zstride + (x - node_min.X);

		u32 index_data = vm->m_area.index(x, node_min.Y - 1, z);

		// Mapgens concern themselves with stone and water.
		for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
			float fill = 0.f;
			if (!fast_terrain)
				fill = noise_inter_valley_fill->result[index_3d];

			if (vm->m_data[index_data].getContent() == CONTENT_IGNORE) {
				bool river = (river_y > surface_y);

				if (river && y == surface_y) {
					// river bottom
					vm->m_data[index_data] = n_sand;
				} else if ((fast_terrain || river) && y <= surface_y) {
					// ground
					vm->m_data[index_data] = n_stone;
				} else if (river && y < river_y) {
					// river
					vm->m_data[index_data] = n_river_water;
				} else if ((!fast_terrain) && (!river) && round(fill * slope) >= y - surface_y) {
					// ground (slow method)
					vm->m_data[index_data] = n_stone;
					heightmap[index_2d] = surface_max_y = y;
				} else if (y <= water_level) {
					// sea
					vm->m_data[index_data] = n_water;
				} else {
					vm->m_data[index_data] = n_air;
				}
			}

			vm->m_area.add_y(em, index_data, 1);
			if (!fast_terrain)
				index_3d += ystride;
		}

		if (!fast_terrain) {
			// Assign the humidity adjusted by water proximity.
			noise_humidity->result[index_2d] = humidityByTerrain(
					noise_humidity->result[index_2d],
					surface_max_y,
					noise_rivers->result[index_2d],
					noise_valley_depth->result[index_2d]);

			// Assign the heat adjusted by altitude. See humidity, above.
			if (use_altitude_chill && surface_max_y > 0)
				noise_heat->result[index_2d]
					*= pow(0.5f, (surface_max_y - altitude_chill / 3.f) / altitude_chill);
		}
	}

	return surface_max_y;
}