make youngtrees, bushes fall on dig,

make moss fall when the node holding it is dug,
and make trunk roots decay (exploiting the standard leafdecay function)

bushes/init.lua

@@ -26,7 +26,7 @@ node_box = {
 		{-0.0612,-0.500000,-0.500000,0.0612,0.500000,-0.375000}, --NodeBox 1
 	}
 },
-	groups = {snappy=3,flammable=2},
+	groups = {snappy=3,flammable=2,attached_node=1},
 	sounds = default.node_sound_leaves_defaults(),
 	drop = 'default:stick'
 })
@@ -61,7 +61,8 @@ for i in pairs(BushBranchCenter) do
 		--	tree=1, -- MM: disabled because some recipes use group:tree for trunks
 			snappy=3,
 			flammable=2,
-			leaves=1
+			leaves=1,
+			attached_node=1
 		},
 		sounds = default.node_sound_leaves_defaults(),
 		drop = 'default:stick 4'
@@ -104,7 +105,8 @@ for i in pairs(BushBranchSide) do
 		--	tree=1, -- MM: disabled because some recipes use group:tree for trunks
 			snappy=3,
 			flammable=2,
-			leaves=1
+			leaves=1,
+			attached_node=1
 		},
 		sounds = default.node_sound_leaves_defaults(),
 		drop = 'default:stick 3'

trunks/nodes.lua

@@ -79,7 +79,7 @@ minetest.register_node("trunks:moss", {
 	walkable = false,
 	node_box = {type = "fixed", fixed = flat_moss},
 	selection_box = {type = "fixed", fixed = flat_stick},--{type = "wallmounted"},
-	groups = {snappy = 3, flammable = 3 },
+	groups = {snappy = 3, flammable = 3, attached_node=1 },
 	sounds = default.node_sound_leaves_defaults(),
 })
 
@@ -98,7 +98,7 @@ minetest.register_node("trunks:moss_fungus", {
 	walkable = false,
 	node_box = {type = "fixed", fixed = flat_moss},
 	selection_box = {type = "fixed", fixed = flat_stick},--{type = "wallmounted"},
-	groups = {snappy = 3, flammable = 3 },
+	groups = {snappy = 3, flammable = 3, attached_node=1 },
 	sounds = default.node_sound_leaves_defaults(),
 })
 
@@ -361,13 +361,19 @@ for i in pairs(TRuNKS) do
 					snappy=1,
 					choppy=2,
 					oddly_breakable_by_hand=1,
-					flammable=2--,
+					flammable=2,
 					--not_in_creative_inventory=1 -- atm in inv for testing
 				},
 				--drop = "trunks:twig_1", -- not sure about this yet
 				sounds = default.node_sound_wood_defaults(),
 			})
 
+			default.register_leafdecay({
+				trunks = { MoD..":"..TRuNK },
+				leaves = { "trunks:"..TRuNK.."root" },
+				radius = 1,
+			})
+
 		else
 			minetest.log("error", string.format("[Trunks] warning: tree type '%s:%s' not found", MoD, TRuNK))
 		end

youngtrees/init.lua

@@ -40,7 +40,7 @@ minetest.register_node("youngtrees:youngtree2_middle",{
 			{-0.500000,0.125000,-0.500000,0.500000,0.500000,0.500000}, --NodeBox 3
 		}
 	},
-		groups = {snappy=3,flammable=2},
+		groups = {snappy=3,flammable=2,attached_node=1},
 	sounds = default.node_sound_leaves_defaults(),
 	drop = 'trunks:twig_1'
 })
@@ -58,7 +58,7 @@ minetest.register_node("youngtrees:youngtree_top", {
 		type = "fixed",
 		fixed = {-0.3, -0.5, -0.3, 0.3, 0.5, 0.3}
 	},
-	groups = {snappy=3,flammable=2},
+	groups = {snappy=3,flammable=2,attached_node=1},
 	sounds = default.node_sound_leaves_defaults(),
 	drop = 'trunks:twig_1'
 })
@@ -77,7 +77,7 @@ minetest.register_node("youngtrees:youngtree_middle", {
 		type = "fixed",
 		fixed = {-0.3, -0.5, -0.3, 0.3, 0.5, 0.3}
 	},
-	groups = {snappy=3,flammable=2},
+	groups = {snappy=3,flammable=2,attached_node=1},
 	sounds = default.node_sound_leaves_defaults(),
 	drop = 'trunks:twig_1'
 })
@@ -97,7 +97,7 @@ minetest.register_node("youngtrees:youngtree_bottom", {
 		type = "fixed",
 		fixed = {-0.3, -0.5, -0.3, 0.3, 0.5, 0.3}
 	},
-	groups = {snappy=3,flammable=2},
+	groups = {snappy=3,flammable=2,attached_node=1},
 	sounds = default.node_sound_leaves_defaults(),
 	drop = 'trunks:twig_1'
 })