split the magma conduit stuff into a separate mod

depends.txt

@@ -4,4 +4,5 @@ farming?
 cottages?
 bucket?
 dynamic_liquid?
-wool?
+wool?
+magma_conduits?

init.lua

@@ -36,119 +36,3 @@ dofile(modpath.."/biomes/level2.lua")
 dofile(modpath.."/biomes/level3.lua")
 dofile(modpath.."/biomes/lava_sea.lua")
 dofile(modpath.."/biomes/underworld.lua")
-
-minetest.register_alias_force("mapgen_lava_source", "air") -- veins of lava are far more realistic
-minetest.register_ore({
-	ore_type = "vein",
-	ore = "default:lava_source",
-	wherein = {
-		"default:stone",
-		"default:desert_stone",
-		"default:sandstone",
-		"default:sand",
-		"default:desert_sand",
-		"default:silver_sand",
-		"default:gravel",
-		"default:stone_with_coal",
-		"default:stone_with_iron",
-		"default:stone_with_copper",
-		"default:stone_with_gold",
-		"default:stone_with_diamond",
-		"default:dirt",
-		"default:dirt_with_grass",
-		"default:dirt_with_dry_grass",
-		"default:dirt_with_snow",
-		"harderstone:weak_stone",
-		},
-	column_height_min = 2,
-	column_height_max = 6,
-	height_min = -31000,
-	height_max = 512,
-	noise_threshold = 0.9,
-	noise_params = {
-		offset = 0,
-		scale = 3,
-		spread = {x=400, y=800, z=400},
-		seed = 25391,
-		octaves = 4,
-		persist = 0.5,
-		flags = "eased",
-	},
-	random_factor = 0,
-})
-
--------------------------------------------------------------------------------------------------
--- Ameliorate lava floods on the surface world by removing lava that's poised to spill
-
-local c_air = minetest.get_content_id("air")
-local c_snowblock = minetest.get_content_id("default:snowblock")
-local c_obsidian = minetest.get_content_id("default:obsidian")
-local c_lava = minetest.get_content_id("default:lava_source")
-
-local water_level = tonumber(minetest.get_mapgen_setting("water_level"))
-
-local is_adjacent_to_air = function(area, data, pos)
-	return (data[area:index(pos.x+1, pos.y, pos.z)] == c_air
-		or data[area:index(pos.x-1, pos.y, pos.z)] == c_air
-		or data[area:index(pos.x, pos.y, pos.z+1)] == c_air
-		or data[area:index(pos.x, pos.y, pos.z-1)] == c_air
-		or data[area:index(pos.x, pos.y-1, pos.z)] == c_air)
-end
-
-dfcaverns.remove_unsupported_lava = function(area, data, vi)
-	if data[vi] == c_lava then
-		local pos = area:position(vi)
-		if is_adjacent_to_air(area, data, pos) then
-			data[vi] = c_air
-			dfcaverns.remove_unsupported_lava(area, data, area:index(pos.x+1, pos.y, pos.z))
-			dfcaverns.remove_unsupported_lava(area, data, area:index(pos.x-1, pos.y, pos.z))
-			dfcaverns.remove_unsupported_lava(area, data, area:index(pos.x, pos.y, pos.z+1))
-			dfcaverns.remove_unsupported_lava(area, data, area:index(pos.x, pos.y, pos.z-1))
-			dfcaverns.remove_unsupported_lava(area, data, area:index(pos.x, pos.y+1, pos.z))
-		end
-	end
-end
-
-local data = {}
-
-minetest.register_on_generated(function(minp, maxp, seed)
-	--if too far from water level, abort. Caverns are on their own.
-	if minp.y > 512 or maxp.y < water_level then
-		return
-	end
-		
-	--easy reference to commonly used values
-	local t_start = os.clock()
-	local x_max = maxp.x
-	local y_max = maxp.y
-	local z_max = maxp.z
-	local x_min = minp.x
-	local y_min = minp.y
-	local z_min = minp.z
-		
-	local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
-	local area = VoxelArea:new{MinEdge=emin, MaxEdge=emax}
-	vm:get_data(data)
-		
-	for z = z_min, z_max do -- for each xy plane progressing northwards
-		--structure loop, hollows out the cavern
-		for y = y_min, y_max do -- for each x row progressing upwards
-			if y > water_level then
-				local vi = area:index(x_min, y, z) --current node index
-				for x = x_min, x_max do -- for each node do
-					dfcaverns.remove_unsupported_lava(area, data, vi)
-					vi = vi + 1
-				end
-			end
-		end
-	end
-		
-	--send data back to voxelmanip
-	vm:set_data(data)
-	--calc lighting
-	vm:set_lighting({day = 0, night = 0})
-	vm:calc_lighting()
-	vm:update_liquids()
-	--write it to world
-	vm:write_to_map(data)
-end)