dfcaverns/df_caverns/level2.lua
FaceDeer 882395ef75
Modpack refactor (#4)
Split this mod into a set of sub-mods in a modpack, and in the process did a whole bunch of renovations.

* updated Subterrane's API to allow for more patterned placement of things
* added "warrens"
* clean separation of flooded and non-flooded caverns
* rearranged biomes to make cavern layers more distinct
* added oil layer
* added underworld layer
2018-12-31 11:46:27 -07:00

342 lines
13 KiB
Lua

local c_water = minetest.get_content_id("default:water_source")
local c_air = minetest.get_content_id("air")
local c_dirt = minetest.get_content_id("default:dirt")
local c_dirt_moss = minetest.get_content_id("df_mapitems:dirt_with_cave_moss")
local c_wet_flowstone = minetest.get_content_id("df_mapitems:wet_flowstone")
local c_dry_flowstone = minetest.get_content_id("df_mapitems:dry_flowstone")
local c_veinstone = minetest.get_content_id("df_mapitems:veinstone")
local wall_vein_perlin_params = {
offset = 0,
scale = 1,
spread = {x = 50, y = 50, z = 50},
seed = 2199,
octaves = 3,
persist = 0.63,
lacunarity = 2.0,
flags = "eased",
}
local subsea_level = df_caverns.config.level2_min - (df_caverns.config.level2_min - df_caverns.config.level1_min) * 0.33 -- "sea level" for the flooded caverns.
local flooding_threshold = math.min(df_caverns.config.tunnel_flooding_threshold, df_caverns.config.cavern_threshold) -- cavern value out to which we're flooding tunnels and warrens
local get_biome = function(heat, humidity)
if humidity < 23 then -- about 20% of locations fall below this threshold
return "barren"
elseif heat < 40 then
return "goblincap" -- about 33% are below this threshold
elseif heat < 60 then
return "sporetree" -- another 33%
else
return "tunneltube"
end
end
local goblin_cap_shrublist
local tunnel_tube_shrublist
local spore_tree_shrublist
if minetest.get_modpath("df_farming") then
goblin_cap_shrublist = {
df_farming.spawn_plump_helmet_vm,
df_farming.spawn_plump_helmet_vm,
df_farming.spawn_dead_fungus_vm,
df_farming.spawn_cavern_fungi_vm,
}
tunnel_tube_shrublist = {
df_farming.spawn_sweet_pod_vm,
df_farming.spawn_cave_wheat_vm,
df_farming.spawn_cave_wheat_vm,
df_farming.spawn_dead_fungus_vm,
df_farming.spawn_cavern_fungi_vm,
}
spore_tree_shrublist = {
df_farming.spawn_pig_tail_vm,
df_farming.spawn_pig_tail_vm,
df_farming.spawn_cave_wheat_vm,
df_farming.spawn_dead_fungus_vm,
df_farming.spawn_cavern_fungi_vm,
}
end
local goblin_cap_cavern_floor = function(abs_cracks, vert_rand, vi, area, data, data_param2)
local ystride = area.ystride
if abs_cracks < 0.1 then
df_caverns.stalagmites(abs_cracks, vert_rand, vi, area, data, data_param2, true)
elseif data[vi-ystride] ~= c_air then -- leave the ground as rock if it's only one node thick
if math.random() < 0.25 then
data[vi] = c_dirt
else
data[vi] = c_dirt_moss
end
if math.random() < 0.1 then
df_caverns.place_shrub(vi+ystride, area, data, data_param2, goblin_cap_shrublist)
elseif math.random() < 0.015 then
df_trees.spawn_goblin_cap_vm(vi+ystride, area, data)
end
end
end
local spore_tree_cavern_floor = function(abs_cracks, vert_rand, vi, area, data, data_param2)
local ystride = area.ystride
if abs_cracks < 0.1 then
df_caverns.stalagmites(abs_cracks, vert_rand, vi, area, data, data_param2, true)
elseif data[vi-ystride] ~= c_air then -- leave the ground as rock if it's only one node thick
if math.random() < 0.25 then
data[vi] = c_dirt
else
data[vi] = c_dirt_moss
end
if math.random() < 0.1 then
df_caverns.place_shrub(vi+ystride, area, data, data_param2, spore_tree_shrublist)
elseif math.random() < 0.05 then
df_trees.spawn_spore_tree_vm(vi+ystride, area, data)
end
end
end
local tunnel_tube_cavern_floor = function(abs_cracks, vert_rand, vi, area, data, data_param2)
local ystride = area.ystride
if abs_cracks < 0.1 then
df_caverns.stalagmites(abs_cracks, vert_rand, vi, area, data, data_param2, true)
elseif data[vi-ystride] ~= c_air then -- leave the ground as rock if it's only one node thick
if math.random() < 0.25 then
data[vi] = c_dirt
else
data[vi] = c_dirt_moss
end
if math.random() < 0.1 then
df_caverns.place_shrub(vi+ystride, area, data, data_param2, tunnel_tube_shrublist)
elseif math.random() < 0.05 then
df_trees.spawn_tunnel_tube_vm(vi+ystride, area, data, data_param2)
end
end
end
local decorate_level_2 = function(minp, maxp, seed, vm, node_arrays, area, data)
math.randomseed(minp.x + minp.y*2^8 + minp.z*2^16 + seed) -- make decorations consistent between runs
local heatmap = minetest.get_mapgen_object("heatmap")
local humiditymap = minetest.get_mapgen_object("humiditymap")
local data_param2 = df_caverns.data_param2
vm:get_param2_data(data_param2)
local nvals_cracks = mapgen_helper.perlin2d("df_cavern:cracks", minp, maxp, df_caverns.np_cracks)
local nvals_cave = node_arrays.nvals_cave
local cave_area = node_arrays.cave_area
local cavern_def = node_arrays.cavern_def
local vein_noise
-- Partly fill flooded caverns and warrens
for vi in area:iterp(minp, maxp) do
local cave_val = nvals_cave[cave_area:transform(area, vi)]
if cave_val < -flooding_threshold then
local index2d = mapgen_helper.index2di(minp, maxp, area, vi)
local biome_name = get_biome(heatmap[index2d], humiditymap[index2d])
local cave_threshold = cavern_def.cave_threshold
--check if we're just inside the boundary of the (negazone) cavern threshold
if biome_name == "barren" and cave_val < -cave_threshold and cave_val > -cave_threshold - 0.01 then
-- add giant rooty structures to the flooded barren caverns
if vein_noise == nil then
vein_noise = mapgen_helper.perlin3d("df_caverns:wall_veins", minp, maxp, wall_vein_perlin_params)
end
-- we can reuse cave_area here, its extents are minp, maxp too.
if data[vi] == c_air and math.abs(vein_noise[cave_area:transform(area, vi)]) < 0.02 then
data[vi] = c_veinstone
end
end
if data[vi] == c_air and area:get_y(vi) <= subsea_level then
data[vi] = c_water -- otherwise, fill air with water when below sea level
end
end
end
---------------------------------------------------------
-- Cavern floors
for _, vi in ipairs(node_arrays.cavern_floor_nodes) do
local vert_rand = mapgen_helper.xz_consistent_randomi(area, vi)
local index2d = mapgen_helper.index2di(minp, maxp, area, vi)
local biome_name = get_biome(heatmap[index2d], humiditymap[index2d])
local abs_cracks = math.abs(nvals_cracks[index2d])
local flooded_caverns = nvals_cave[cave_area:transform(area, vi)] < 0 -- this indicates if we're in the "flooded" set of caves or not.
if minp.y < subsea_level and area:get_y(vi) < subsea_level and flooded_caverns then
-- underwater floor
df_caverns.flooded_cavern_floor(abs_cracks, vert_rand, vi, area, data)
elseif biome_name == "barren" then
if flooded_caverns then
df_caverns.wet_cavern_floor(abs_cracks, vert_rand, vi, area, data, data_param2)
else
df_caverns.dry_cavern_floor(abs_cracks, vert_rand, vi, area, data, data_param2)
end
elseif biome_name == "goblincap" then
goblin_cap_cavern_floor(abs_cracks, vert_rand, vi, area, data, data_param2)
elseif biome_name == "sporetree" then
spore_tree_cavern_floor(abs_cracks, vert_rand, vi, area, data, data_param2)
elseif biome_name == "tunneltube" then
tunnel_tube_cavern_floor(abs_cracks, vert_rand, vi, area, data, data_param2)
end
end
--------------------------------------
-- Cavern ceilings
for _, vi in ipairs(node_arrays.cavern_ceiling_nodes) do
local vert_rand = mapgen_helper.xz_consistent_randomi(area, vi)
local index2d = mapgen_helper.index2di(minp, maxp, area, vi)
local biome_name = get_biome(heatmap[index2d], humiditymap[index2d])
local abs_cracks = math.abs(nvals_cracks[index2d])
local flooded_caverns = nvals_cave[cave_area:transform(area, vi)] < 0 -- this indicates if we're in the "flooded" set of caves or not.
if flooded_caverns and minp.y < subsea_level and area:get_y(vi) < subsea_level then
-- underwater ceiling, do nothing
elseif biome_name == "barren" then
if flooded_caverns then
-- wet barren
if abs_cracks < 0.1 then
df_caverns.stalactites(abs_cracks, vert_rand, vi, area, data, data_param2, true)
end
else
-- dry barren
if abs_cracks < 0.075 then
df_caverns.stalactites(abs_cracks, vert_rand, vi, area, data, data_param2, false)
end
local y = area:get_y(vi)
local y_proportional = (y - df_caverns.config.level1_min) / (df_caverns.config.level2_min - df_caverns.config.level1_min)
if abs_cracks * y_proportional > 0.3 and math.random() < 0.005 * y_proportional then
df_mapitems.place_big_crystal_cluster(area, data, data_param2, vi, math.random(0,1), true)
end
end
else -- all the other biomes
df_caverns.glow_worm_cavern_ceiling(abs_cracks, vert_rand, vi, area, data, data_param2)
end
end
----------------------------------------------
-- Tunnel floors
for _, vi in ipairs(node_arrays.tunnel_floor_nodes) do
local index2d = mapgen_helper.index2di(minp, maxp, area, vi)
local biome_name = get_biome(heatmap[index2d], humiditymap[index2d])
local flooded_caverns = nvals_cave[cave_area:transform(area, vi)] < 0 -- this indicates if we're in the "flooded" set of caves or not.
if not (flooded_caverns and minp.y < subsea_level and area:get_y(vi) < subsea_level) then
if flooded_caverns or biome_name ~= "barren" then
-- we're in flooded areas or are not barren
df_caverns.tunnel_floor(minp, maxp, area, vi, nvals_cracks, data, data_param2, true)
else
df_caverns.tunnel_floor(minp, maxp, area, vi, nvals_cracks, data, data_param2, false)
end
end
end
------------------------------------------------------
-- Tunnel ceiling
for _, vi in ipairs(node_arrays.tunnel_ceiling_nodes) do
local index2d = mapgen_helper.index2di(minp, maxp, area, vi)
local biome_name = get_biome(heatmap[index2d], humiditymap[index2d])
local flooded_caverns = nvals_cave[cave_area:transform(area, vi)] < 0 -- this indicates if we're in the "flooded" set of caves or not.
if not (flooded_caverns and minp.y < subsea_level and area:get_y(vi) < subsea_level) then
if flooded_caverns or biome_name ~= "barren" then
-- we're in flooded areas or are not barren
df_caverns.tunnel_ceiling(minp, maxp, area, vi, nvals_cracks, data, data_param2, true)
else
df_caverns.tunnel_ceiling(minp, maxp, area, vi, nvals_cracks, data, data_param2, false)
end
else
-- air pockets
local ystride = area.ystride
local cracks = nvals_cracks[index2d]
if cracks > 0.5 and data[vi-ystride] == c_water then
data[vi-ystride] = c_air
if cracks > 0.7 and data[vi-ystride*2] == c_water then
data[vi-ystride*2] = c_air
end
end
end
end
----------------------------------------------
-- Warren floors
for _, vi in ipairs(node_arrays.warren_floor_nodes) do
local index2d = mapgen_helper.index2di(minp, maxp, area, vi)
local biome_name = get_biome(heatmap[index2d], humiditymap[index2d])
local flooded_caverns = nvals_cave[cave_area:transform(area, vi)] < 0 -- this indicates if we're in the "flooded" set of caves or not.
if not (flooded_caverns and minp.y < subsea_level and area:get_y(vi) < subsea_level) then
if flooded_caverns or biome_name ~= "barren" then
-- we're in flooded areas or are not barren
df_caverns.tunnel_floor(minp, maxp, area, vi, nvals_cracks, data, data_param2, true)
else
df_caverns.tunnel_floor(minp, maxp, area, vi, nvals_cracks, data, data_param2, false)
end
end
end
------------------------------------------------------
-- Warren ceiling
for _, vi in ipairs(node_arrays.warren_ceiling_nodes) do
local index2d = mapgen_helper.index2di(minp, maxp, area, vi)
local biome_name = get_biome(heatmap[index2d], humiditymap[index2d])
local flooded_caverns = nvals_cave[cave_area:transform(area, vi)] < 0 -- this indicates if we're in the "flooded" set of caves or not.
if not (flooded_caverns and minp.y < subsea_level and area:get_y(vi) < subsea_level) then
if flooded_caverns or biome_name ~= "barren" then
-- we're in flooded areas or are not barren
df_caverns.tunnel_ceiling(minp, maxp, area, vi, nvals_cracks, data, data_param2, true)
else
df_caverns.tunnel_ceiling(minp, maxp, area, vi, nvals_cracks, data, data_param2, false)
end
end
-- else air pockets?
end
----------------------------------------------
-- Column material override for dry biome
for _, vi in ipairs(node_arrays.column_nodes) do
local index2d = mapgen_helper.index2di(minp, maxp, area, vi)
local biome_name = get_biome(heatmap[index2d], humiditymap[index2d])
local dry = (biome_name == "barren") and (nvals_cave[cave_area:transform(area, vi)] > 0)
if dry and data[vi] == c_wet_flowstone then
data[vi] = c_dry_flowstone
end
end
vm:set_param2_data(data_param2)
end
subterrane.register_layer({
name = "cavern layer 2",
y_max = df_caverns.config.level1_min-1,
y_min = df_caverns.config.level2_min,
cave_threshold = df_caverns.config.cavern_threshold,
boundary_blend_range = 64, -- range near ymin and ymax over which caves diminish to nothing
perlin_cave = df_caverns.perlin_cave,
perlin_wave = df_caverns.perlin_wave,
solidify_lava = true,
columns = {
maximum_radius = 15,
minimum_radius = 4,
node = "df_mapitems:wet_flowstone",
weight = 0.25,
maximum_count = 50,
minimum_count = 5,
},
decorate = decorate_level_2,
warren_region_variability_threshold = 0.33,
double_frequency = true,
})