tweak decomposition.

leaves will now start decomposing faster if touching certain nodes.
they'll also take longer overall to start decomposing.

mods/bg_tree/decompose.lua

@@ -7,20 +7,31 @@ local vec = blockgame.vector
 local leaves = modname .. ":leaves"
 local leaves_decomposing = modname .. ":leaves_decomposing"
 
--- END OF NODE NAMES
+
+
+local decompose_scores = {
+	dirty = 50,
+	leaves_decomposing = 30,
+}
+
+local start_decompose_cost = 4000
 
 blockgame.register_increasing_abm({
 	id = modname .. ":begin_decompose",
 	label = "decompose leaves",
 	nodenames = {leaves},
 	neighbors = {"group:dirty", leaves_decomposing},
-	interval = 20,
+	interval = 30,
 	chance = 4,
 	rate = function (pos, node, data)
-		return data.value + math.random(4, 6)
+		local score = blockgame.score_nearby_nodes(pos, 2, decompose_scores, function (gain, distance)
+			return math.floor(gain / (distance ^ 3))
+		end)
+
+		return data.value + score
 	end,
 	check = function (pos, node, data)
-		return data.value >= 80
+		return data.value >= start_decompose_cost
 	end,
 	action = function (pos, node, data)
 		-- NOTE: might wanna access the 4 from somewhere, instead of directly knowing it.
@@ -30,11 +41,6 @@ blockgame.register_increasing_abm({
 	end,
 })
 
-local decompose_scores = {
-	dirty = 50,
-	leaves_decomposing = 30,
-}
-
 local decompose_cost = 30000
 local average_leaves_per_dirt = 4
 
@@ -53,7 +59,6 @@ blockgame.register_increasing_abm({
 		end)
 
 		score = score + bonus
-
 		return data.value + score
 	end,
 	check = function (pos, node, data)