plantlife_modpack/plants_lib/init.lua

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-- Plantlife mod by Vanessa Ezekowitz
-- 2012-11-29
--
-- This mod combines all of the functionality from poison ivy,
-- flowers, and jungle grass. If you have any of these, you no
-- longer need them.
--
-- License:
-- CC-BY-SA for most textures, except flowers
-- WTFPL for the flowers textures
-- WTFPL for all code and everything else
-- Various settings - most of these probably won't need to be changed
plantlife_seed_diff = 329 -- needs to be global so other mods can see it
local plantlife_debug = false -- ...unless you want the modpack to spam the console ;-)
local perlin_octaves = 3
local perlin_persistence = 0.6
local perlin_scale = 100
local plantlife_limit = 0.1 -- compared against perlin noise. lower = more abundant
-- Local functions
math.randomseed(os.time())
local dbg = function(s)
if plantlife_debug then
print("[Plantlife] " .. s)
end
end
local is_node_loaded = function(node_pos)
n = minetest.env:get_node_or_nil(node_pos)
if (n == nil) or (n.name == "ignore") then
return false
end
return true
end
-- The spawning ABM
spawn_on_surfaces = function(sdelay, splant, sradius, schance, ssurface, savoid, seed_diff, lightmin, lightmax, nneighbors, ocount, facedir, depthmax, altmin, altmax)
if seed_diff == nil then seed_diff = 0 end
if lightmin == nil then lightmin = 0 end
if lightmax == nil then lightmax = LIGHT_MAX end
if nneighbors == nil then nneighbors = ssurface end
if ocount == nil then ocount = 0 end
if depthmax == nil then depthmax = 1 end
if altmin == nil then altmin = -31000 end
if altmax == nil then altmax = 31000 end
minetest.register_abm({
nodenames = { ssurface },
interval = sdelay,
chance = schance,
neighbors = nneighbors,
action = function(pos, node, active_object_count, active_object_count_wider)
local p_top = { x = pos.x, y = pos.y + 1, z = pos.z }
local n_top = minetest.env:get_node(p_top)
local perlin = minetest.env:get_perlin(seed_diff, perlin_octaves, perlin_persistence, perlin_scale )
local noise = perlin:get2d({x=p_top.x, y=p_top.z})
if noise > plantlife_limit and n_top.name == "air" and is_node_loaded(p_top) then
local n_light = minetest.env:get_node_light(p_top, nil)
if minetest.env:find_node_near(p_top, sradius + math.random(-1.5,2), savoid) == nil
and n_light >= lightmin
and n_light <= lightmax
and table.getn(minetest.env:find_nodes_in_area({x=pos.x-1, y=pos.y, z=pos.z-1}, {x=pos.x+1, y=pos.y, z=pos.z+1}, nneighbors)) > ocount
and pos.y >= altmin
and pos.y <= altmax
then
local walldir = plant_valid_wall(p_top)
if splant == "poisonivy:seedling" and walldir ~= nil then
dbg("Spawn: poisonivy:climbing at "..dump(p_top).." on "..ssurface)
minetest.env:add_node(p_top, { name = "poisonivy:climbing", param2 = walldir })
else
local deepnode = minetest.env:get_node({ x = pos.x, y = pos.y-depthmax-1, z = pos.z }).name
if (ssurface ~= "default:water_source")
or (ssurface == "default:water_source"
and deepnode ~= "default:water_source") then
dbg("Spawn: "..splant.." at "..dump(p_top).." on "..ssurface)
minetest.env:add_node(p_top, { name = splant, param2 = facedir })
end
end
end
end
end
})
end
-- The growing ABM
grow_plants = function(gdelay, gchance, gplant, gresult, dry_early_node, grow_nodes, facedir, need_wall, grow_vertically, height_limit, ground_nodes)
if need_wall ~= true then need_wall = false end
if grow_vertically ~= true then grow_vertically = false end
if height_limit == nil then height_limit = 62000 end
if ground_node == nil then ground_nodes = { "default:dirt_with_grass" } end
minetest.register_abm({
nodenames = { gplant },
interval = gdelay,
chance = gchance,
action = function(pos, node, active_object_count, active_object_count_wider)
local p_top = {x=pos.x, y=pos.y+1, z=pos.z}
local p_bot = {x=pos.x, y=pos.y-1, z=pos.z}
local n_top = minetest.env:get_node(p_top)
local n_bot = minetest.env:get_node(p_bot)
local groundnode = minetest.env:get_node({x=pos.x, y=pos.y-height_limit, z=pos.z})
if string.find(dump(grow_nodes), n_bot.name) ~= nil and n_top.name == "air" then
if grow_vertically then
if find_first_node(pos, height_limit, ground_nodes) ~= nil then
if need_wall then
local walldir=plant_valid_wall(p_top)
if walldir ~= nil then
dbg("Grow: "..gplant.." upwards to ("..dump(p_top)..") on wall "..walldir)
minetest.env:add_node(p_top, { name = gplant, param2 = walldir })
end
else
dbg("Grow: "..gplant.." upwards to ("..dump(p_top)..")")
minetest.env:add_node(p_top, { name = gplant })
end
end
-- corner case for changing short junglegrass to dry shrub in desert
elseif n_bot.name == dry_early_node and gplant == "junglegrass:short" then
dbg("Die: "..gplant.." becomes default:dry_shrub at ("..dump(pos)..")")
minetest.env:add_node(pos, { name = "default:dry_shrub" })
elseif gresult == nil then
dbg("Die: "..gplant.." at ("..dump(pos)..")")
minetest.env:remove_node(pos)
elseif gresult ~= nil then
dbg("Grow: "..gplant.." becomes "..gresult.." at ("..dump(pos)..")")
if facedir == nil then
minetest.env:add_node(pos, { name = gresult })
else
minetest.env:add_node(pos, { name = gresult, param2 = facedir })
end
end
end
end
})
end
-- function to decide if a node has a wall that's in verticals_list{}
-- returns wall direction of valid node, or nil if invalid.
plant_valid_wall = function(wallpos)
local walldir = nil
local verts = dump(verticals_list)
local testpos = { x = wallpos.x-1, y = wallpos.y, z = wallpos.z }
if string.find(verts, minetest.env:get_node(testpos).name) ~= nil then walldir=3 end
local testpos = { x = wallpos.x+1, y = wallpos.y, z = wallpos.z }
if string.find(verts, minetest.env:get_node(testpos).name) ~= nil then walldir=2 end
local testpos = { x = wallpos.x , y = wallpos.y, z = wallpos.z-1 }
if string.find(verts, minetest.env:get_node(testpos).name) ~= nil then walldir=5 end
local testpos = { x = wallpos.x , y = wallpos.y, z = wallpos.z+1 }
if string.find(verts, minetest.env:get_node(testpos).name) ~= nil then walldir=4 end
return walldir
end
-- Function to search straight down from (pos) to find first node in match list.
find_first_node = function(pos, height_limit, nodelist)
for i = 1, height_limit do
n = minetest.env:get_node({x=pos.x, y=pos.y-i, z=pos.z})
if string.find(dump(nodelist),n.name) ~= nil then
return n.name
end
end
return nil
end
print("[Plantlife] Loaded!")