trees/jungletree.lua

local function add_tree_branch(pos)
	--chooze random leave
	local leaves = {"green","yellow","red"}
	local leave = "trees:leaves_"..leaves[math.random(1,3)]
	minetest.env:add_node(pos, {name="default:jungletree"})
	for i = math.floor(math.random(2)), -math.floor(math.random(2)), -1 do
		for k = math.floor(math.random(2)), -math.floor(math.random(2)), -1 do
			local p = {x=pos.x+i, y=pos.y, z=pos.z+k}
			local n = minetest.env:get_node(p)
			if (n.name=="air") then
				minetest.env:add_node(p, {name=leave})
			end
			local chance = math.abs(i+k)
			if (chance < 1) then
				p = {x=pos.x+i, y=pos.y+1, z=pos.z+k}
				n = minetest.env:get_node(p)
				if (n.name=="air") then
					minetest.env:add_node(p, {name=leave})
				end
			end
		end
	end
end

abstract_trees.grow_jungletree = function(pos)
	local size =  5+math.random(6)
	if size < 8 then
		for i = size, -2, -1 do
			local p = {x=pos.x, y=pos.y+i, z=pos.z}
			minetest.env:add_node(p, {name="default:jungletree"})
			if i == size then
				add_tree_branch({x=pos.x, y=pos.y+size+math.random(0, 1), z=pos.z})
				add_tree_branch({x=pos.x+1, y=pos.y+i-math.random(2), z=pos.z})
				add_tree_branch({x=pos.x-1, y=pos.y+i-math.random(2), z=pos.z})
				add_tree_branch({x=pos.x, y=pos.y+i-math.random(2), z=pos.z+1})
				add_tree_branch({x=pos.x, y=pos.y+i-math.random(2), z=pos.z-1})
			end
			if i < 0 then
				minetest.env:add_node({x=pos.x+1, y=pos.y+i-math.random(2), z=pos.z}, {name="default:jungletree"})
				minetest.env:add_node({x=pos.x, y=pos.y+i-math.random(2), z=pos.z+1}, {name="default:jungletree"})
				minetest.env:add_node({x=pos.x-1, y=pos.y+i-math.random(2), z=pos.z}, {name="default:jungletree"})
				minetest.env:add_node({x=pos.x, y=pos.y+i-math.random(2), z=pos.z-1}, {name="default:jungletree"})
			end
			if (math.sin(i/size*i) < 0.2 and i > 3 and math.random(0,2) < 1.5) then
				branch_pos = {x=pos.x+math.random(0,1), y=pos.y+i, z=pos.z-math.random(0,1)}
				add_tree_branch(branch_pos)
			end
		end
	else
		for i = size, -1, -1 do
		  if (math.sin(i/size*i) < 0.2 and i > 3 and math.random(0,2) < 1.5) then
			  branch_pos = {x=pos.x+math.random(0,1), y=pos.y+i, z=pos.z-math.random(0,1)}
			  add_tree_branch(branch_pos)
		  end
		  if i < math.random(0,1) then
			  minetest.env:add_node({x=pos.x+1, y=pos.y+i, z=pos.z+1}, {name="default:jungletree"})
			  minetest.env:add_node({x=pos.x+2, y=pos.y+i, z=pos.z-1}, {name="default:jungletree"})
			  minetest.env:add_node({x=pos.x, y=pos.y+i, z=pos.z-2}, {name="default:jungletree"})
			  minetest.env:add_node({x=pos.x-1, y=pos.y+i, z=pos.z}, {name="default:jungletree"})
		  end
		  if i == size then
			  add_tree_branch({x=pos.x+1, y=pos.y+i, z=pos.z+1})
			  add_tree_branch({x=pos.x+2, y=pos.y+i, z=pos.z-1})
			  add_tree_branch({x=pos.x, y=pos.y+i, z=pos.z-2})
			  add_tree_branch({x=pos.x-1, y=pos.y+i, z=pos.z})
			  add_tree_branch({x=pos.x+1, y=pos.y+i, z=pos.z+2})
			  add_tree_branch({x=pos.x+3, y=pos.y+i, z=pos.z-1})
			  add_tree_branch({x=pos.x, y=pos.y+i, z=pos.z-3})
			  add_tree_branch({x=pos.x-2, y=pos.y+i, z=pos.z})
			  add_tree_branch({x=pos.x+1, y=pos.y+i, z=pos.z})
			  add_tree_branch({x=pos.x+1, y=pos.y+i, z=pos.z-1})
			  add_tree_branch({x=pos.x, y=pos.y+i, z=pos.z-1})
			  add_tree_branch({x=pos.x, y=pos.y+i, z=pos.z})
		  else
			  minetest.env:add_node({x=pos.x+1, y=pos.y+i, z=pos.z}, {name="default:jungletree"})
			  minetest.env:add_node({x=pos.x+1, y=pos.y+i, z=pos.z-1}, {name="default:jungletree"})
			  minetest.env:add_node({x=pos.x, y=pos.y+i, z=pos.z-1}, {name="default:jungletree"})
			  minetest.env:add_node({x=pos.x, y=pos.y+i, z=pos.z}, {name="default:jungletree"})
		  end
		end
	end
end

--nodes
local leaves = {"green","yellow","red"}
for color = 1, 3 do
	local leave_name = "trees:leaves_"..leaves[color]
	minetest.register_node(leave_name, {
		description = "Jungle Tree Leaves",
		drawtype = "allfaces_optional",
		tiles = {"trees_leaves_"..leaves[color]..".png"},
		paramtype = "light",
		groups = {snappy=3, leafdecay=3, flammable=2},
		drop = {
			max_items = 1,
			items = {
				{items = {'trees:jungletree_sapling'},rarity = 20},
			}
		},
		sounds = default.node_sound_leaves_defaults(),
	})
end

minetest.register_node("trees:jungletree_sapling", {
	description = "Jungle Tree Sapling",
	drawtype = "plantlike",
	visual_scale = 1.0,
	tiles = {"trees_jungletree_sapling.png"},
	inventory_image = "trees_jungletree_sapling.png",
	wield_image = "trees_jungletree_sapling.png",
	paramtype = "light",
	walkable = false,
	groups = {snappy=2,dig_immediate=3,flammable=2},
})

--abm
minetest.register_abm({
	nodenames = {"trees:jungletree_sapling"},
	interval = 5,
	chance = 2,
	action = function(pos, node)
		abstract_trees.grow_jungletree(pos)
	end,
})

--spawn
plantslib:register_generate_plant({
    surface = "default:dirt_with_grass",
    max_count = 30,
    avoid_nodes = {"group:tree"},
    avoid_radius = 2,
    rarity = 40,
    seed_diff = 112,
    min_elevation = -1,
    max_elevation = 40,
    plantlife_limit = -0.6,
    humidity_max = -0.9,
    humidity_min = 0.4,
    temp_max = -0.9,
    temp_min = 0,
  },
  "abstract_trees.grow_jungletree"
)