Restore some old stuff in compatibility.lua

mods/CORE/mcl_init/compatibility.lua

@@ -25,3 +25,51 @@ mcl_compatibility.sort_nodes = function(nodes)
 	end
 	return new_nodes
 end
+
+function mcl_vars.pos_to_block(pos)
+	return mcl_mapgen and mcl_mapgen.pos_to_block(pos)
+end
+
+function mcl_vars.pos_to_chunk(pos)
+	return mcl_mapgen and mcl_mapgen.pos_to_chunk(pos)
+end
+
+function mcl_vars.get_chunk_number(pos)
+	return mcl_mapgen and get_chunk_number(pos)
+end
+
+function mcl_vars.is_generated(pos)
+	local node = minetest.get_node(pos)
+	if not node then return false end
+	if node.name == "ignore" then return false end
+	return true
+end
+
+function mcl_vars.get_node(p, force, us_timeout)
+	if not p or not p.x or not p.y or not p.z then return {name="error"} end
+	local node = minetest.get_node(p)
+	if node.name ~= "ignore" then return node end
+	minetest.get_voxel_manip():read_from_map(p, p)
+	return minetest.get_node(pos)
+end
+
+mcl_vars.mg_overworld_min = -62
+mcl_vars.mg_overworld_max_official = 198
+mcl_vars.mg_bedrock_overworld_min = -62
+mcl_vars.mg_bedrock_overworld_max = -58
+mcl_vars.mg_lava_overworld_max = -52
+mcl_vars.mg_lava = true
+mcl_vars.mg_bedrock_is_rough = true
+mcl_vars.mg_overworld_max = 30927
+mcl_vars.mg_nether_min = -29067
+mcl_vars.mg_nether_max = -28939
+mcl_vars.mg_bedrock_nether_bottom_min = -29067
+mcl_vars.mg_bedrock_nether_top_max = -29063
+mcl_vars.mg_end_min = -27073
+mcl_vars.mg_end_max_official = -26817
+mcl_vars.mg_end_max = -2062
+mcl_vars.mg_end_platform_pos = { x = 100, y = -26999, z = 0 }
+mcl_vars.mg_realm_barrier_overworld_end_max = -2062
+mcl_vars.mg_realm_barrier_overworld_end_min = -2073
+mcl_vars.mg_dungeons = true
+