made leaves depend on the trunks they spawn with to avoid decaying

rather than just any trunk being enough to stop just any leaves from decaying.
Re-tuned the leaf decay interval/chance values accordingly.  Changed a few
variables to avoid possible conflicts.  Added a setting to allow one to disable
the new leaf decay code.  Moved sapling growth code into its own file.  Minor
changes to comments here and there.  Got rid of simple trees list (made the
code do various checks in realtime instead, since it's just startup code
anyway).  Fixed messed-up crafting for jungle trees; condensed most of the
crafting code into main craft registry loop.  Mostly fixed broken aliases of
default jungletrees.

init.lua

@@ -1,4 +1,4 @@
--- More trees!  2013-01-20
+-- More trees!  2013-02-11
 --
 -- This mod adds more types of trees to the game
 --
@@ -8,35 +8,27 @@
 -- Brought together into one mod and made L-systems compatible by Vanessa
 -- Ezekowitz.
 --
--- Conifers and Jungle tree axioms/rules by Vanessa Ezekowitz, with the 
--- latter having been tweaked by RealBadAngel, most others written by
--- RealBadAngel.
---
--- License: WTFPL for all parts (code and textures)
---
-
--- snow biomes mod uses this code to make biomes:
---
---	local perlin1 = env:get_perlin(112,3, 0.5, 150)
---	local test = perlin1:get2d({x=pos.x, y=pos.z})
---	if smooth and (test > 0.73 or (test > 0.43 and math.random(0,29) > (0.73 - test) * 100 )) then
---		in_biome = true
---	elseif not smooth and test > 0.53 then
---		in_biome = true
---	end
---	
--- We'll just save this for possible later use ;-)
+-- Firs and Jungle tree axioms/rules by Vanessa Ezekowitz, with the 
+-- latter having been tweaked by RealBadAngel, most other axioms/rules written
+-- by RealBadAngel.
 --
+-- License: WTFPL for all parts (code and textures, including those copied
+-- from the jungletree and conifers mods) except the default jungle tree trunk
+-- texture, which is CC-By-SA.
 
 moretrees = {}
 
-dofile(minetest.get_modpath("moretrees").."/settings.lua")
+-- These first two dofile() calls must precede any others, and must remain in
+-- this order, otherwise variables and node names will get skipped.
 
+dofile(minetest.get_modpath("moretrees").."/settings.lua")
 dofile(minetest.get_modpath("moretrees").."/node_defs.lua")
+
 dofile(minetest.get_modpath("moretrees").."/tree_models.lua")
 dofile(minetest.get_modpath("moretrees").."/biome_defs.lua")
 dofile(minetest.get_modpath("moretrees").."/crafts.lua")
 dofile(minetest.get_modpath("moretrees").."/leafdecay.lua")
+dofile(minetest.get_modpath("moretrees").."/saplings.lua")
 
 -- tree spawning setup
 
@@ -53,56 +45,6 @@ plantslib:register_generate_plant(moretrees.spruce_biome, "moretrees:grow_spruce
 plantslib:register_generate_plant(moretrees.jungletree_biome, "moretrees:grow_jungletree")
 plantslib:register_generate_plant(moretrees.fir_biome, "moretrees:grow_fir")
 
--- sapling growth
-
-for i in ipairs(moretrees.simple_trees) do
-	local tree_name = trees[i][1]
-	local tree_model = tree_name.."_model"
-	local tree_biome = tree_name.."_biome"
-
-	plantslib:dbg(dump(moretrees[tree_biome].surface))
-	
-	plantslib:grow_plants({
-		grow_delay = moretrees.sapling_interval,
-		grow_chance = moretrees.sapling_chance,
-		grow_plant = "moretrees:"..tree_name.."_sapling",
-		grow_nodes = moretrees[tree_biome].surface,
-		grow_function = moretrees[tree_model],
-	})
-end
-
-plantslib:grow_plants({
-	grow_delay = moretrees.sapling_interval,
-	grow_chance = moretrees.sapling_chance,
-	grow_plant = "moretrees:birch_sapling",
-	grow_nodes = moretrees.birch_biome.surface,
-	grow_function = "moretrees:grow_birch"
-})
-
-plantslib:grow_plants({
-	grow_delay = moretrees.sapling_interval,
-	grow_chance = moretrees.sapling_chance,
-	grow_plant = "moretrees:spruce_sapling",
-	grow_nodes = moretrees.spruce_biome.surface,
-	grow_function = "moretrees:grow_spruce"
-})
-
-plantslib:grow_plants({
-	grow_delay = moretrees.sapling_interval,
-	grow_chance = moretrees.sapling_chance,
-	grow_plant = "moretrees:fir_sapling",
-	grow_nodes = moretrees.fir_biome.surface,
-	grow_function = "moretrees:grow_fir"
-})
-
-plantslib:grow_plants({
-	grow_delay = moretrees.sapling_interval,
-	grow_chance = moretrees.sapling_chance,
-	grow_plant = "moretrees:jungletree_sapling",
-	grow_nodes = moretrees.jungletree_biome.surface,
-	grow_function = "moretrees:grow_jungletree"
-})
-
 -- Code to spawn a birch tree
 
 function moretrees:grow_birch(pos)
@@ -125,7 +67,7 @@ function moretrees:grow_spruce(pos)
 	end
 end
 
--- Code that spawns jungle trees and firs
+-- Code to spawn jungle trees
 
 moretrees.jt_axiom1 = "FFFA"
 moretrees.jt_rules_a1 = "FFF[&&-FBf[&&&Ff]^^^Ff][&&+FBFf[&&&FFf]^^^Ff][&&---FBFf[&&&Ff]^^^Ff][&&+++FBFf[&&&Ff]^^^Ff]F/A"
@@ -179,6 +121,8 @@ function moretrees:grow_jungletree(pos)
 	minetest.env:spawn_tree(pos, moretrees.jungletree_model)
 end
 
+-- code to spawn fir trees (formerly "conifers")
+
 function moretrees:grow_fir(pos)
 	if math.random(2) == 1 then
 		moretrees.fir_model.leaves="moretrees:fir_leaves"
@@ -201,8 +145,6 @@ function moretrees:grow_fir(pos)
 	minetest.env:spawn_tree(pos,moretrees.fir_model)
 end
 
-
-
 -- Should we remove all the trees above the conifers altitude?
 
 if moretrees.firs_remove_default_trees == true then
@@ -224,4 +166,17 @@ if moretrees.firs_remove_default_trees == true then
 	})
 end
 
-print("[Moretrees] Loaded (2013-01-18)")
+-- snow biomes mod uses this code to make biomes:
+--
+--	local perlin1 = env:get_perlin(112,3, 0.5, 150)
+--	local test = perlin1:get2d({x=pos.x, y=pos.z})
+--	if smooth and (test > 0.73 or (test > 0.43 and math.random(0,29) > (0.73 - test) * 100 )) then
+--		in_biome = true
+--	elseif not smooth and test > 0.53 then
+--		in_biome = true
+--	end
+--	
+-- We'll just save this for possible later use ;-)
+--
+
+print("[Moretrees] Loaded (2013-02-11)")