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Add bonemealing callback for dirt with grass.

* Add new file mcl_flowers/bonemeal.lua, containing the bonemealing
  callback for "mcl_core:dirt_with_grass".
* Override "mcl_core:dirt_with_grass" with a _mcl_on_bonemealing handler
  calling a function defined in mcl_flowers. This sidesteps the problem
  that bonemealing a node from mcl_core needs knowledge of mcl_flowers,
  which would create a circular dependency.  H/t to cora for suggesting
  this solution. H/t to wsor for suggesting a solution that also works.
This commit is contained in:
kabou 2022-04-30 17:34:15 +02:00
parent dcbf5cffdd
commit b0111847b7
2 changed files with 126 additions and 0 deletions

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@ -0,0 +1,123 @@
-- bonemealing grass nodes
--
-- When bonemealing "mcl_core:dirt_with_grass", it spawns grass and flowers
-- over a 7x7 patch of adjacent grassy nodes.
--
-- Because of potential dependency complications it is not advisable to add
-- callbacks to mcl_core that create dependencies on mods that depend on
-- mcl_core, such as mcl_flowers.
--
-- To work around this restriction, the bonemealing callback is defined here
-- and the _mcl_on_bonemealing callback in "mcl_core:dirt_with_grass" node
-- definition is overwritten with it.
local mg_name = minetest.get_mapgen_setting("mg_name")
local flowers_table_simple = {
"mcl_flowers:dandelion",
"mcl_flowers:poppy",
}
local flowers_table_plains = {
"mcl_flowers:dandelion",
"mcl_flowers:dandelion",
"mcl_flowers:poppy",
"mcl_flowers:oxeye_daisy",
"mcl_flowers:tulip_orange",
"mcl_flowers:tulip_red",
"mcl_flowers:tulip_white",
"mcl_flowers:tulip_pink",
"mcl_flowers:azure_bluet",
}
local flowers_table_swampland = {
"mcl_flowers:blue_orchid",
}
local flowers_table_flower_forest = {
"mcl_flowers:dandelion",
"mcl_flowers:poppy",
"mcl_flowers:oxeye_daisy",
"mcl_flowers:tulip_orange",
"mcl_flowers:tulip_red",
"mcl_flowers:tulip_white",
"mcl_flowers:tulip_pink",
"mcl_flowers:azure_bluet",
"mcl_flowers:allium",
}
local biome_flowers_tables = {
["Plains"] = flowers_table_plains,
["Plains_beach"] = flowers_table_plains,
["Plains_ocean"] = flowers_table_plains,
["Plains_deep_ocean"] = flowers_table_plains,
["Plains_underground"] = flowers_table_plains,
["SunflowerPlains"] = flowers_table_plains,
["SunflowerPlains_ocean"] = flowers_table_plains,
["SunflowerPlains_deep_ocean"] = flowers_table_plains,
["SunflowerPlains_underground"] = flowers_table_plains,
["Swampland"] = flowers_table_swampland,
["Swampland_shore"] = flowers_table_swampland,
["Swampland_ocean"] = flowers_table_swampland,
["Swampland_deep_ocean"] = flowers_table_swampland,
["Swampland_underground"] = flowers_table_swampland,
["FlowerForest"] = flowers_table_flower_forest,
["FlowerForest_beach"] = flowers_table_flower_forest,
["FlowerForest_ocean"] = flowers_table_flower_forest,
["FlowerForest_deep_ocean"] = flowers_table_flower_forest,
["FlowerForest_underground"] = flowers_table_flower_forest,
}
-- Randomly generate flowers, tall grass or nothing
-- pos: node to place into
-- color: param2 value for tall grass
--
local function add_random_flower(pos, color)
-- 90% tall grass, 10% flower
if math.random(1,100) <= 90 then
minetest.add_node(pos, {name="mcl_flowers:tallgrass", param2=color})
else
local flowers_table
if mg_name == "v6" then
flowers_table = flowers_table_plains
else
local biome = minetest.get_biome_name(minetest.get_biome_data(pos).biome)
flowers_table = biome_flowers_tables[biome] or flowers_table_simple
end
minetest.add_node(pos, {name=flowers_table[math.random(1, #flowers_table)]})
end
end
--- Generate tall grass and random flowers in a 7x7 area
-- Bonemealing callback handler for "mcl_core:dirt_with_grass"
--
local function bonemeal_grass(pointed_thing, placer)
local pos, below, r, color
for i = -7, 7 do for j = -7, 7 do for y = -1, 1 do
pos = vector.offset(pointed_thing.above, i, y, j)
if minetest.get_node(pos).name == "air" then
below = minetest.get_node(vector.offset(pos, 0, -1, 0))
r = ((math.abs(i) + math.abs(j)) / 2)
if (minetest.get_item_group(below.name, "grass_block_no_snow") == 1) and
math.random(1, 100) <= 90 / r then
color = below.param2
add_random_flower(pos, color)
end
end
end end end
return true
end
-- Overwrite "mcl_core:dirt_with_grass" bonemealing handler.
local nodename = "mcl_core:dirt_with_grass"
local olddef = minetest.registered_nodes[nodename]
if not olddef then
minetest.log("warning", "'mcl_core:dirt_with_grass' not registered, cannot add override!")
else
local oldhandler = olddef._mcl_on_bonemealing
local newdef = table.copy(olddef)
newdef._mcl_on_bonemealing = function (pointed_thing, placer)
bonemeal_grass(pointed_thing, placer)
if oldhandler then
oldhandler(pointed_thing, placer)
end
end
minetest.register_node(":" .. nodename, newdef)
end

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@ -519,3 +519,6 @@ if mod_mcimport and mg_name == "singlenode" and fix_doubleplants == true then
end
dofile(modpath.."/register.lua")
-- Bonemealing handler and override for "mcl_core:dirt_with_grass":
dofile(modpath.."/bonemealing.lua")