From 931cb2b99112849648013b443d8bd7df3220e131 Mon Sep 17 00:00:00 2001
From: cora <coradelamouche@gmx.ch>
Date: Wed, 13 Jul 2022 23:16:19 +0200
Subject: [PATCH] Add fallen tree logs

---
 mods/MAPGEN/mcl_terrain_features/init.lua | 84 +++++++++++++++++++++++
 1 file changed, 84 insertions(+)

diff --git a/mods/MAPGEN/mcl_terrain_features/init.lua b/mods/MAPGEN/mcl_terrain_features/init.lua
index 0c95eb9b2c..18f242e367 100644
--- a/mods/MAPGEN/mcl_terrain_features/init.lua
+++ b/mods/MAPGEN/mcl_terrain_features/init.lua
@@ -85,6 +85,90 @@ local function makelake(pos,size,liquid,placein,border,pr)
 	return true
 end
 
+local mushrooms = {"mcl_mushrooms:mushroom_brown","mcl_mushrooms:mushroom_red"}
+
+local function get_fallen_tree_schematic(pos,pr)
+	local tree = minetest.find_node_near(pos,15,{"group:tree"})
+	if not tree then return end
+	tree = minetest.get_node(tree).name
+	local maxlen = 8
+	local minlen = 2
+	local vprob = 120
+	local mprob = 160
+	local len = pr:next(minlen,maxlen)
+	local schem = {
+		size = {x = len + 2, y = 2, z = 3},
+		data = {
+			{name = "air", prob=0},
+			{name = "air", prob=0},
+		}
+	}
+	for i = 1,len do
+		table.insert(schem.data,{name = "mcl_core:vine",param2=4, prob=vprob})
+	end
+	table.insert(schem.data,{name = "air", prob=0})
+	table.insert(schem.data,{name = "air", prob=0})
+	for i = 1,len do
+		table.insert(schem.data,{name = "air", prob=0})
+	end
+
+	table.insert(schem.data,{name = tree, param2 = 0})
+	table.insert(schem.data,{name = "air", prob=0})
+	for i = 1,len do
+		table.insert(schem.data,{name = tree, param2 = 12})
+	end
+	table.insert(schem.data,{name = "air", prob=0})
+	table.insert(schem.data,{name = "air", prob=0})
+	for i = 1,len do
+		table.insert(schem.data,{name =  mushrooms[pr:next(1,#mushrooms)], param2 = 12, prob=mprob})
+	end
+
+	table.insert(schem.data,{name = "air", prob=0})
+	table.insert(schem.data,{name = "air", prob=0})
+	for i = 1,len do
+		table.insert(schem.data,{name = "mcl_core:vine",param2=5, prob=vprob})
+	end
+	table.insert(schem.data,{name = "air", prob=0})
+	table.insert(schem.data,{name = "air", prob=0})
+	for i = 1,len do
+		table.insert(schem.data,{name = "air", prob=0})
+	end
+
+	return schem
+end
+
+mcl_structures.register_structure("fallen_tree",{
+	place_on = {"group:grass_block"},
+	terrain_feature = true,
+	noise_params = {
+		offset = 0.00018,
+		scale = 0.01011,
+		spread = {x = 250, y = 250, z = 250},
+		seed = 24533,
+		octaves = 3,
+		persist = 0.66
+	},
+	flags = "place_center_x, place_center_z",
+	sidelen = 18,
+	solid_ground = true,
+	y_max = mcl_vars.mg_overworld_max,
+	y_min = minetest.get_mapgen_setting("water_level"),
+	on_place = function(pos,def,pr)
+		local air_p1 = vector.offset(pos,-def.sidelen/2,1,-def.sidelen/2)
+		local air_p2 = vector.offset(pos,def.sidelen/2,1,def.sidelen/2)
+		local air = minetest.find_nodes_in_area(air_p1,air_p2,{"air"})
+		if #air < ( def.sidelen * def.sidelen ) / 2 then
+			return false
+		end
+		return true
+	end,
+	place_func = function(pos,def,pr)
+		local schem=get_fallen_tree_schematic(pos,pr)
+		if not schem then return end
+		return minetest.place_schematic(pos,schem,"random")
+	end
+})
+
 mcl_structures.register_structure("lavapool",{
 	place_on = {"group:sand", "group:dirt", "group:stone"},
 	terrain_feature = true,