1
0
Fork 0
MineClone2/mods/MAPGEN/tsm_railcorridors/init.lua

819 lines
27 KiB
Lua
Raw Blame History

This file contains ambiguous Unicode characters!

This file contains ambiguous Unicode characters that may be confused with others in your current locale. If your use case is intentional and legitimate, you can safely ignore this warning. Use the Escape button to highlight these characters.

tsm_railcorridors = {}
-- Load node names
dofile(minetest.get_modpath(minetest.get_current_modname()).."/gameconfig.lua")
-- Settings
local setting
-- Probability function
-- TODO: Check if this is correct
local P = function (float)
return math.floor(32767 * float)
end
-- Wahrscheinlichkeit für jeden Chunk, solche Gänge mit Schienen zu bekommen
-- Probability for every newly generated chunk to get corridors
local probability_railcaves_in_chunk = P(0.3)
setting = tonumber(minetest.settings:get("tsm_railcorridors_probability_railcaves_in_chunk"))
if setting then
probability_railcaves_in_chunk = P(setting)
end
-- Innerhalb welcher Parameter soll sich die Pfadlänge bewegen? (Forks heben den Maximalwert auf)
-- Minimal and maximal value of path length (forks don't look up this value)
local way_min = 4;
local way_max = 7;
setting = tonumber(minetest.settings:get("tsm_railcorridors_way_min"))
if setting then
way_min = setting
end
setting = tonumber(minetest.settings:get("tsm_railcorridors_way_max"))
if setting then
way_max = setting
end
-- Wahrsch. für jeden geraden Teil eines Korridors, Fackeln zu bekommen
-- Probability for every horizontal part of a corridor to be with torches
local probability_torches_in_segment = P(0.5)
setting = tonumber(minetest.settings:get("tsm_railcorridors_probability_torches_in_segment"))
if setting then
probability_torches_in_segment = P(setting)
end
-- Wahrsch. für jeden Teil eines Korridors, nach oben oder nach unten zu gehen
-- Probability for every part of a corridor to go up or down
local probability_up_or_down = P(0.2)
setting = tonumber(minetest.settings:get("tsm_railcorridors_probability_up_or_down"))
if setting then
probability_up_or_down = P(setting)
end
-- Wahrscheinlichkeit für jeden Teil eines Korridors, sich zu verzweigen vorsicht, wenn fast jeder Gang sich verzweigt, kann der Algorithums unlösbar werden und MT hängt sich auf
-- Probability for every part of a corridor to fork caution, too high values may cause MT to hang on.
local probability_fork = P(0.04)
setting = tonumber(minetest.settings:get("tsm_railcorridors_probability_fork"))
if setting then
probability_fork = P(setting)
end
-- Wahrscheinlichkeit für jeden geraden Teil eines Korridors eine Kiste zu enthalten
-- Probability for every part of a corridor to contain a chest
local probability_chest = P(0.05)
setting = tonumber(minetest.settings:get("tsm_railcorridors_probability_chest"))
if setting then
probability_chest = P(setting)
end
-- Probability for every part of a corridor to contain a cart
-- Disabled because cart spawning creates error message spam:
-- “m_static_exists=true but static data doesn't actually exist in (x,y,z)
-- TODO: Set back to 0.05 if this is fixedd.
local probability_cart = P(0)
setting = tonumber(minetest.settings:get("tsm_railcorridors_probability_cart"))
if setting then
probability_cart = P(setting)
end
-- Probability for a rail corridor system to be damaged
local probability_damage = P(1.0)
setting = tonumber(minetest.settings:get("tsm_railcorridors_probability_damage"))
if setting then
probability_damage = P(setting)
end
-- Enable cobwebs
local place_cobwebs = true
setting = minetest.settings:get_bool("tsm_railcorridors_place_cobwebs")
if setting ~= nil then
place_cobwebs = setting
end
-- Enable mob spawners
local place_mob_spawners = true
setting = minetest.settings:get_bool("tsm_railcorridors_place_mob_spawners")
if setting ~= nil then
place_mob_spawners = setting
end
-- Max. and min. heights between rail corridors are generated
local height_min
if mcl_vars.mg_lava then
height_min = mcl_vars.mg_lava_overworld_max + 2
else
height_min = mcl_vars.mg_bedrock_overworld_max + 2
end
local height_max = mcl_util.layer_to_y(60)
-- Chaos Mode: If enabled, rail corridors don't stop generating when hitting obstacles
local chaos_mode = minetest.settings:get_bool("tsm_railcorridors_chaos") or false
-- Parameter Ende
-- Random generators
local pr, webperlin_major, webperlin_minor
local pr_initialized = false
local function InitRandomizer(seed)
-- Mostly used for corridor gen.
pr = PseudoRandom(seed)
-- Used for cobweb generation, both noises have to reach a high value for cobwebs to appear
webperlin_major = PerlinNoise(934, 3, 0.6, 500)
webperlin_minor = PerlinNoise(834, 3, 0.6, 50)
pr_initialized = true
end
-- Checks if the mapgen is allowed to carve through this structure and only sets
-- the node if it is allowed. Does never build in liquids.
-- If check_above is true, don't build if the node above is attached (e.g. rail)
-- or a liquid.
local function SetNodeIfCanBuild(pos, node, check_above)
if check_above then
local abovename = minetest.get_node({x=pos.x,y=pos.y+1,z=pos.z}).name
local abovedef = minetest.registered_nodes[abovename]
if abovename == "unknown" or abovename == "ignore" or
(abovedef.groups and abovedef.groups.attached_node) or
-- This is done because cobwebs are often fake liquids
(abovedef.liquidtype ~= "none" and abovename ~= tsm_railcorridors.nodes.cobweb) then
return false
end
end
local name = minetest.get_node(pos).name
local def = minetest.registered_nodes[name]
if name ~= "unknown" and name ~= "ignore" and def.is_ground_content and
(def.liquidtype == "none" or name == tsm_railcorridors.nodes.cobweb) then
minetest.set_node(pos, node)
return true
else
return false
end
end
-- Tries to place a rail, taking the damage chance into account
local function PlaceRail(pos, damage_chance)
if damage_chance ~= nil and damage_chance > 0 then
local x = pr:next(0,100)
if x <= damage_chance then
return false
end
end
return SetNodeIfCanBuild(pos, {name=tsm_railcorridors.nodes.rail})
end
-- Returns true if the node as point can be considered “ground”, that is, a solid material
-- in which mine shafts can be built into, e.g. stone, but not air or water
local function IsGround(pos)
local nodename = minetest.get_node(pos).name
local nodedef = minetest.registered_nodes[nodename]
return nodename ~= "unknown" and nodename ~= "ignore" and nodedef.is_ground_content and nodedef.walkable and nodedef.liquidtype == "none"
end
-- Returns true if rails are allowed to be placed on top of this node
local function IsRailSurface(pos)
local nodename = minetest.get_node(pos).name
local nodedef = minetest.registered_nodes[nodename]
return nodename ~= "unknown" and nodename ~= "ignore" and nodedef.walkable and (nodedef.node_box == nil or nodedef.node_box.type == "regular")
end
-- Checks if the node is empty space which requires to be filled by a platform
local function NeedsPlatform(pos)
local node = minetest.get_node({x=pos.x,y=pos.y-1,z=pos.z})
local node2 = minetest.get_node({x=pos.x,y=pos.y-2,z=pos.z})
local nodedef = minetest.registered_nodes[node.name]
return node.name ~= "ignore" and node.name ~= "unknown" and nodedef.is_ground_content and ((nodedef.walkable == false and node2.name ~= tsm_railcorridors.nodes.dirt) or (nodedef.groups and nodedef.groups.falling_node))
end
-- Create a cube filled with the specified nodes
-- Specialties:
-- * Avoids floating rails for non-solid nodes like air
-- Returns true if all nodes could be set
-- Returns false if setting one or more nodes failed
local function Cube(p, radius, node, replace_air_only)
local y_top = p.y+radius
local nodedef = minetest.registered_nodes[node.name]
local solid = nodedef.walkable and (nodedef.node_box == nil or nodedef.node_box.type == "regular") and nodedef.liquidtype == "none"
-- Check if all the nodes could be set
local built_all = true
for zi = p.z-radius, p.z+radius do
for yi = y_top, p.y-radius, -1 do
for xi = p.x-radius, p.x+radius do
local ok = false
if not solid and yi == y_top then
local topdef = minetest.registered_nodes[minetest.get_node({x=xi,y=yi+1,z=zi}).name]
if not (topdef.groups and topdef.groups.attached_node) and topdef.liquidtype == "none" then
ok = true
end
else
ok = true
end
local built = false
if ok then
if replace_air_only ~= true then
built = SetNodeIfCanBuild({x=xi,y=yi,z=zi}, node)
else
if minetest.get_node({x=xi,y=yi,z=zi}).name == "air" then
built = SetNodeIfCanBuild({x=xi,y=yi,z=zi}, node)
end
end
end
if not built then
built_all = false
end
end
end
end
return built_all
end
local function Platform(p, radius, node)
for zi = p.z-radius, p.z+radius do
for xi = p.x-radius, p.x+radius do
local np = NeedsPlatform({x=xi,y=p.y,z=zi})
if np then
minetest.set_node({x=xi,y=p.y-1,z=zi}, node)
end
end
end
end
-- Chests
local function PlaceChest(pos, param2)
if SetNodeIfCanBuild(pos, {name=tsm_railcorridors.nodes.chest, param2=param2}) then
local meta = minetest.get_meta(pos)
local inv = meta:get_inventory()
local items = tsm_railcorridors.get_treasures(pr)
for i=1, math.min(#items, inv:get_size("main")) do
inv:set_stack("main", i, ItemStack(items[i]))
end
end
end
-- This function checks if a cart has ACTUALLY been spawned.
-- If not, it tries to spawn it again, and again, until it succeeded or
-- it failed too often.
-- To be calld by minetest.after.
-- This is a HORRIBLE workaround thanks to the fact that minetest.add_entity is unreliable as fuck
-- See: https://github.com/minetest/minetest/issues/4759
-- FIXME: Kill this horrible hack with fire as soon you can.
local function RecheckCartHack(params)
local pos = params[1]
local cart_id = params[2]
local tries = params[3]
tries = tries - 1
-- Find cart
for _, obj in ipairs(minetest.get_objects_inside_radius(pos, 1)) do
if obj ~= nil and obj:get_luaentity().name == cart_id then
-- Cart found! We can now safely call the callback func.
-- (calling it earlier has the danger of failing)
tsm_railcorridors.on_construct_cart(pos, obj)
return
end
end
if tries <= 0 then
-- Abort if too many tries to avoid excessive function calls
return
end
-- No cart found! :-( Try again …
if minetest.get_node(pos).name == tsm_railcorridors.nodes.rail then
minetest.add_entity(pos, cart_id)
minetest.after(5, RecheckCartHack, {pos, cart_id, tries})
end
-- The rail may have been destroyed in the meantime, that's why the node is checked.
end
-- Try to place a cobweb.
-- pos: Position of cobweb
-- needs_check: If true, checks if any of the nodes above, below or to the side of the cobweb.
-- side_vector: Required if needs_check is true. Unit vector which points towards the side of the cobweb to place.
local function TryPlaceCobweb(pos, needs_check, side_vector)
local check_passed = false
if needs_check then
-- Check for walkable nodes above, below or at the side of the cobweb.
-- If any of those nodes is walkable, we are fine.
local check_vectors = {
side_vector,
{x=0, y=1, z=0},
{x=0, y=-1, z=0},
}
for c=1, #check_vectors do
local cpos = vector.add(pos, check_vectors[c])
local cname = minetest.get_node(cpos).name
local cdef = minetest.registered_nodes[cname]
if cname ~= "ignore" and cdef.walkable then
check_passed = true
break
end
end
else
check_passed = true
end
if check_passed then
return SetNodeIfCanBuild(pos, {name=tsm_railcorridors.nodes.cobweb})
else
return false
end
end
local function WoodBulk(pos, wood)
SetNodeIfCanBuild({x=pos.x+1, y=pos.y, z=pos.z+1}, {name=wood})
SetNodeIfCanBuild({x=pos.x-1, y=pos.y, z=pos.z+1}, {name=wood})
SetNodeIfCanBuild({x=pos.x+1, y=pos.y, z=pos.z-1}, {name=wood})
SetNodeIfCanBuild({x=pos.x-1, y=pos.y, z=pos.z-1}, {name=wood})
end
-- Gänge mit Schienen
-- Corridors with rails
-- Returns <success>, <segments>
-- success: true if corridor could be placed entirely
-- segments: Number of segments successfully placed
local function corridor_part(start_point, segment_vector, segment_count, wood, post, first_or_final, up_or_down_prev)
local p = {x=start_point.x, y=start_point.y, z=start_point.z}
local torches = pr:next() < probability_torches_in_segment
local dir = {0, 0}
local torchdir = {1, 1}
local node_wood = {name=wood}
local node_fence = {name=post}
if segment_vector.x == 0 and segment_vector.z ~= 0 then
dir = {1, 0}
torchdir = {5, 4}
elseif segment_vector.x ~= 0 and segment_vector.z == 0 then
dir = {0, 1}
torchdir = {3, 2}
end
for segmentindex = 0, segment_count-1 do
local dug = Cube(p, 1, {name="air"})
if not chaos_mode and segmentindex > 0 and not dug then return false, segmentindex end
-- Add wooden platform, if neccessary. To avoid floating rails
if segment_vector.y == 0 then
if segmentindex == 0 and up_or_down_prev then
-- Thin 1×1 platform directly after going up or down.
-- This is done to avoid placing too much wood at slopes
Platform({x=p.x-dir[2], y=p.y-1, z=p.z-dir[1]}, 0, node_wood)
Platform({x=p.x, y=p.y-1, z=p.z}, 0, node_wood)
Platform({x=p.x+dir[2], y=p.y-1, z=p.z+dir[1]}, 0, node_wood)
else
-- Normal 3×3 platform
Platform({x=p.x, y=p.y-1, z=p.z}, 1, node_wood)
end
end
-- Diese komischen Holz-Konstruktionen
-- These strange wood structs
if segmentindex % 2 == 1 and segment_vector.y == 0 then
local calc = {
p.x+dir[1], p.z+dir[2], -- X and Z, added by direction
p.x-dir[1], p.z-dir[2], -- subtracted
p.x+dir[2], p.z+dir[1], -- orthogonal
p.x-dir[2], p.z-dir[1], -- orthogonal, the other way
}
--[[ Shape:
WWW
P.P
PrP
pfp
W = wood
P = post (above floor level)
p = post (in floor level, only placed if no floor)
From previous generation (for reference):
f = floor
r = rail
. = air
]]
-- Don't place those wood structs below open air
if not (minetest.get_node({x=calc[1], y=p.y+2, z=calc[2]}).name == "air" and
minetest.get_node({x=calc[3], y=p.y+2, z=calc[4]}).name == "air" and
minetest.get_node({x=p.x, y=p.y+2, z=p.z}).name == "air") then
-- Left post and planks
local left_ok = true
left_ok = SetNodeIfCanBuild({x=calc[1], y=p.y-1, z=calc[2]}, node_fence)
if left_ok then left_ok = SetNodeIfCanBuild({x=calc[1], y=p.y , z=calc[2]}, node_fence) end
if left_ok then left_ok = SetNodeIfCanBuild({x=calc[1], y=p.y+1, z=calc[2]}, node_wood) end
-- Right post and planks
local right_ok = true
right_ok = SetNodeIfCanBuild({x=calc[3], y=p.y-1, z=calc[4]}, node_fence)
if right_ok then right_ok = SetNodeIfCanBuild({x=calc[3], y=p.y , z=calc[4]}, node_fence) end
if right_ok then right_ok = SetNodeIfCanBuild({x=calc[3], y=p.y+1, z=calc[4]}, node_wood) end
-- Middle planks
local top_planks_ok = false
if left_ok and right_ok then top_planks_ok = SetNodeIfCanBuild({x=p.x, y=p.y+1, z=p.z}, node_wood) end
if minetest.get_node({x=p.x,y=p.y-2,z=p.z}).name=="air" then
if left_ok then SetNodeIfCanBuild({x=calc[1], y=p.y-2, z=calc[2]}, node_fence) end
if right_ok then SetNodeIfCanBuild({x=calc[3], y=p.y-2, z=calc[4]}, node_fence) end
end
-- Torches on the middle planks
if torches and top_planks_ok then
-- Place torches at horizontal sides
SetNodeIfCanBuild({x=calc[5], y=p.y+1, z=calc[6]}, {name=tsm_railcorridors.nodes.torch_wall, param2=torchdir[1]}, true)
SetNodeIfCanBuild({x=calc[7], y=p.y+1, z=calc[8]}, {name=tsm_railcorridors.nodes.torch_wall, param2=torchdir[2]}, true)
end
elseif torches then
-- Try to build torches instead of the wood structs
local node = {name=tsm_railcorridors.nodes.torch_floor, param2=minetest.dir_to_wallmounted({x=0,y=-1,z=0})}
-- Try two different height levels
local pos1 = {x=calc[1], y=p.y-2, z=calc[2]}
local pos2 = {x=calc[3], y=p.y-2, z=calc[4]}
local nodedef1 = minetest.registered_nodes[minetest.get_node(pos1).name]
local nodedef2 = minetest.registered_nodes[minetest.get_node(pos2).name]
if nodedef1.walkable then
pos1.y = pos1.y + 1
end
SetNodeIfCanBuild(pos1, node, true)
if nodedef2.walkable then
pos2.y = pos2.y + 1
end
SetNodeIfCanBuild(pos2, node, true)
end
end
-- nächster Punkt durch Vektoraddition
-- next way point
p = vector.add(p, segment_vector)
end
-- End of the corridor segment; create the final piece
local dug = Cube(p, 1, {name="air"})
if not chaos_mode and not dug then return false, segment_count end
if segment_vector.y == 0 then
Platform({x=p.x, y=p.y-1, z=p.z}, 1, node_wood)
end
return true, segment_count
end
local function corridor_func(waypoint, coord, sign, up_or_down, up_or_down_next, up_or_down_prev, up, wood, post, first_or_final, damage, no_spawner)
local segamount = 3
if up_or_down then
segamount = 1
end
if sign then
segamount = 0-segamount
end
local vek = {x=0,y=0,z=0};
local start = table.copy(waypoint)
if coord == "x" then
vek.x=segamount
if up_or_down and up == false then
start.x=start.x+segamount
end
elseif coord == "z" then
vek.z=segamount
if up_or_down and up == false then
start.z=start.z+segamount
end
end
if up_or_down then
if up then
vek.y = 1
else
vek.y = -1
end
end
local segcount = pr:next(4,6)
if up_or_down and up == false then
Cube(waypoint, 1, {name="air"})
end
local corridor_dug, corridor_segments_dug = corridor_part(start, vek, segcount, wood, post, first_or_final, up_or_down_prev)
local corridor_vek = {x=vek.x*segcount, y=vek.y*segcount, z=vek.z*segcount}
-- nachträglich Schienen legen
-- after this: rails
segamount = 1
if sign then
segamount = 0-segamount
end
if coord == "x" then
vek.x=segamount
elseif coord == "z" then
vek.z=segamount
end
if up_or_down then
if up then
vek.y = 1
else
vek.y = -1
end
end
-- Calculate chest and cart position
local chestplace = -1
local cartplace = -1
local minseg
if first_or_final == "first" then
minseg = 2
else
minseg = 1
end
if corridor_dug and not up_or_down then
if pr:next() < probability_chest then
chestplace = pr:next(minseg, segcount+1)
end
if tsm_railcorridors.carts and #tsm_railcorridors.carts > 0 and pr:next() < probability_cart then
cartplace = pr:next(minseg, segcount+1)
end
end
local railsegcount
if not chaos_mode and not corridor_dug then
railsegcount = corridor_segments_dug * 3
elseif not up_or_down then
railsegcount = segcount * 3
else
railsegcount = segcount
end
for i=1,railsegcount do
local p = {x=waypoint.x+vek.x*i, y=waypoint.y+vek.y*i-1, z=waypoint.z+vek.z*i}
-- Randomly returns either the left or right side of the main rail.
-- Also returns offset as second return value.
local left_or_right = function(pos, vek)
local off, facedir
if pr:next(1, 2) == 1 then
-- left
off = {x = -vek.z, y= 0, z = vek.x}
else
-- right
off = {x=vek.z, y= 0, z= -vek.x}
end
return vector.add(pos, off), off
end
if (minetest.get_node({x=p.x,y=p.y-1,z=p.z}).name=="air" and minetest.get_node({x=p.x,y=p.y-3,z=p.z}).name~=tsm_railcorridors.nodes.rail) then
p.y = p.y - 1;
if i == chestplace then
chestplace = chestplace + 1
end
if i == cartplace then
cartplace = cartplace + 1
end
end
-- Chest
if i == chestplace then
local cpos, offset = left_or_right(p, vek)
if minetest.get_node(cpos).name == post then
chestplace = chestplace + 1
else
PlaceChest(cpos, minetest.dir_to_facedir(offset))
end
end
-- Rail and cart
if i == cartplace then
local cpos = left_or_right(p, vek)
if minetest.get_node(cpos).name == post then
cartplace = cartplace + 1
else
local placed = PlaceRail(cpos, damage)
if placed then
local cart_type = pr:next(1, #tsm_railcorridors.carts)
-- FIXME: The cart sometimes fails to spawn
-- See <https://github.com/minetest/minetest/issues/4759>
local cart_id = tsm_railcorridors.carts[cart_type]
local cart = minetest.add_entity(cpos, cart_id)
-- This checks if the cart is actually spawned, it's a giant hack!
-- Note that the callback function is also called there.
-- TODO: Move callback function to this position when the
-- minetest.add_entity bug has been fixed.
minetest.after(2, RecheckCartHack, {cpos, cart_id, 10})
end
end
end
-- Mob spawner (at center)
if place_mob_spawners and tsm_railcorridors.nodes.spawner and not no_spawner and
webperlin_major:get3d(p) > 0.3 and webperlin_minor:get3d(p) > 0.5 then
-- Place spawner (if activated in gameconfig),
-- enclose in cobwebs and setup the spawner node.
local spawner_placed = SetNodeIfCanBuild(p, {name=tsm_railcorridors.nodes.spawner})
if spawner_placed then
local size = 1
if webperlin_major:get3d(p) > 0.5 then
size = 2
end
if place_cobwebs then
Cube(p, size, {name=tsm_railcorridors.nodes.cobweb}, true)
end
tsm_railcorridors.on_construct_spawner(p)
no_spawner = true
end
end
-- Main rail; this places almost all the rails
if IsRailSurface({x=p.x,y=p.y-1,z=p.z}) then
PlaceRail(p, damage)
end
-- Place cobwebs left and right in the corridor
if place_cobwebs and tsm_railcorridors.nodes.cobweb then
-- Helper function to place a cobweb at the side (based on chance an Perlin noise)
local cobweb_at_side = function(basepos, vek)
if pr:next(1,5) == 1 then
local h = pr:next(0, 2) -- 3 possible cobweb heights
local cpos = {x=basepos.x+vek.x, y=basepos.y+h, z=basepos.z+vek.z}
if webperlin_major:get3d(cpos) > 0.05 and webperlin_minor:get3d(cpos) > 0.1 then
if h == 0 then
-- No check neccessary at height offset 0 since the cobweb is on the floor
return TryPlaceCobweb(cpos)
else
-- Check nessessary
return TryPlaceCobweb(cpos, true, vek)
end
end
end
return false
end
-- Right cobweb
local rvek = {x=-vek.z, y=0, z=vek.x}
cobweb_at_side(p, rvek)
-- Left cobweb
local lvek = {x=vek.z, y=0, z=-vek.x}
cobweb_at_side(p, lvek)
end
end
local offset = table.copy(corridor_vek)
local final_point = vector.add(waypoint, offset)
if up_or_down then
if up then
offset.y = offset.y - 1
final_point = vector.add(waypoint, offset)
else
offset[coord] = offset[coord] + segamount
final_point = vector.add(waypoint, offset)
-- After going up or down, 1 missing rail piece must be added
if IsRailSurface({x=final_point.x,y=final_point.y-2,z=final_point.z}) then
PlaceRail({x=final_point.x,y=final_point.y-1,z=final_point.z}, damage)
end
end
end
if not corridor_dug then
return false, no_spawner
else
return final_point, no_spawner
end
end
local function start_corridor(waypoint, coord, sign, length, psra, wood, post, damage, no_spawner)
local wp = waypoint
local c = coord
local s = sign
local ud = false -- up or down
local udn = false -- up or down is next
local udp = false -- up or down was previous
local up
for i=1,length do
local needs_platform
-- Update previous up/down status
udp = ud
-- Update current up/down status
if udn then
needs_platform = NeedsPlatform(wp)
if needs_platform then
ud = false
end
ud = true
-- Force direction near the height limits
if wp.y >= height_max - 12 then
up = false
elseif wp.y <= height_min + 12 then
up = true
else
-- Chose random direction in between
up = pr:next(0, 2) < 1
end
else
ud = false
end
-- Update next up/down status
if pr:next() < probability_up_or_down and i~=1 and not udn and not needs_platform then
udn = i < length
elseif udn and not needs_platform then
udn = false
end
-- Make corridor / Korridor graben
local first_or_final
if i == length then
first_or_final = "final"
elseif i == 1 then
first_or_final = "first"
end
wp, no_spawner = corridor_func(wp,c,s, ud, udn, udp, up, wood, post, first_or_final, damage, no_spawner)
if wp == false then return end
-- Verzweigung?
-- Fork?
if pr:next() < probability_fork then
local p = {x=wp.x, y=wp.y, z=wp.z}
start_corridor(wp, c, s, pr:next(way_min,way_max), psra, wood, post, damage, no_spawner)
if c == "x" then c="z" else c="x" end
start_corridor(wp, c, s, pr:next(way_min,way_max), psra, wood, post, damage, no_spawner)
start_corridor(wp, c, not s, pr:next(way_min,way_max), psra, wood, post, damage, no_spawner)
WoodBulk({x=p.x, y=p.y-1, z=p.z}, wood)
WoodBulk({x=p.x, y=p.y, z=p.z}, wood)
WoodBulk({x=p.x, y=p.y+1, z=p.z}, wood)
WoodBulk({x=p.x, y=p.y+2, z=p.z}, wood)
return
end
-- coord und sign verändern
-- randomly change sign and coord
if c=="x" then
c="z"
elseif c=="z" then
c="x"
end;
s = pr:next(0, 2) < 1
end
end
local function place_corridors(main_cave_coords, psra)
--[[ ALWAYS start building in the ground. Prevents corridors starting
in mid-air or in liquids. ]]
if not IsGround(main_cave_coords) then
return
end
-- Determine if this corridor system is “damaged” (some rails removed) and to which extent
local damage = 0
if pr:next() < probability_damage then
damage = pr:next(10, 50)
end
--[[ Starter cube: A big hollow dirt cube from which the corridors will extend.
Corridor generation starts here. ]]
if pr:next(0, 100) < 50 then
Cube(main_cave_coords, 4, {name=tsm_railcorridors.nodes.dirt})
Cube(main_cave_coords, 3, {name="air"})
-- Center rail
PlaceRail({x=main_cave_coords.x, y=main_cave_coords.y-3, z=main_cave_coords.z}, damage)
main_cave_coords.y =main_cave_coords.y - 1
else
Cube(main_cave_coords, 3, {name=tsm_railcorridors.nodes.dirt})
Cube(main_cave_coords, 2, {name="air"})
-- Center rail
PlaceRail({x=main_cave_coords.x, y=main_cave_coords.y-2, z=main_cave_coords.z}, damage)
end
local xs = pr:next(0, 2) < 1
local zs = pr:next(0, 2) < 1;
-- Select random wood type (found in gameconfig.lua)
local rnd = pr:next(1,1000)
local woodtype = 1
local accumulated_chance = 0
for w=1, #tsm_railcorridors.nodes.corridor_woods do
local woodtable = tsm_railcorridors.nodes.corridor_woods[w]
accumulated_chance = accumulated_chance + woodtable.chance
if accumulated_chance > 1000 then
minetest.log("warning", "[tsm_railcorridors] Warning: Wood chances add up to over 100%!")
break
end
if rnd <= accumulated_chance then
woodtype = w
break
end
end
local wood = tsm_railcorridors.nodes.corridor_woods[woodtype].wood
local post = tsm_railcorridors.nodes.corridor_woods[woodtype].post
start_corridor(main_cave_coords, "x", xs, pr:next(way_min,way_max), psra, wood, post, damage, false)
start_corridor(main_cave_coords, "z", zs, pr:next(way_min,way_max), psra, wood, post, damage, false)
-- Auch mal die andere Richtung?
-- Try the other direction?
if pr:next(0, 100) < 70 then
start_corridor(main_cave_coords, "x", not xs, pr:next(way_min,way_max), psra, wood, post, damage, false)
end
if pr:next(0, 100) < 70 then
start_corridor(main_cave_coords, "z", not zs, pr:next(way_min,way_max), psra, wood, post, damage, false)
end
end
minetest.register_on_generated(function(minp, maxp, blockseed)
InitRandomizer(blockseed)
if minp.y < height_max and maxp.y > height_min and pr:next() < probability_railcaves_in_chunk then
-- Get semi-random height in chunk
local buffer = 5
local y = pr:next(minp.y + buffer, maxp.y - buffer)
y = math.floor(math.max(height_min + buffer, math.min(height_max - buffer, y)))
-- Mid point of the chunk
local p = {x=minp.x+math.floor((maxp.x-minp.x)/2), y=y, z=minp.z+math.floor((maxp.z-minp.z)/2)}
-- Haupthöhle und alle weiteren
-- Corridors; starting with main cave out of dirt
place_corridors(p, pr)
end
end)