import part of the original nature mod from nature_pack

blossoms/apple spawning portion only
does not include the iron trees or tree-growing code as those are obsolete

nature_classic/global_function.lua

@@ -0,0 +1,43 @@
+local NODE_YOUNG = "young"
+
+nature = {}
+
+local function set_young_node(pos)
+    local meta = minetest.env:get_meta(pos)
+
+    meta:set_string(NODE_YOUNG, "true")
+    minetest.after(5,
+	function(pos)
+	    local meta = minetest.env:get_meta(pos)
+	    meta:set_string(NODE_YOUNG, "false")
+	end,
+    pos)
+end
+
+local function is_not_young(pos)
+    local meta = minetest.env:get_meta(pos)
+
+    local young = meta:get_string(NODE_YOUNG)
+    return young ~= "true"
+end
+
+function nature:grow_node(pos, nodename)
+    if pos ~= nil then
+	local light_enough = minetest.env:get_node_light(pos, nil)
+		>= MINIMUM_GROWTH_LIGHT 
+
+	if is_not_young(pos) and light_enough then
+	    minetest.env:remove_node(pos)
+	    minetest.env:add_node(pos, { name = nodename })
+	    set_young_node(pos)
+
+	    minetest.log("info", nodename .. " has grown at " .. pos.x .. ","
+		.. pos.y .. "," .. pos.z)
+	end
+    end
+end
+
+function nature:is_near_water(pos)
+    return minetest.env:find_node_near(pos, DISTANCE_FROM_WATER,
+	    { "default:water_source" }) ~= nil or DISTANCE_FROM_WATER == -1
+end