tidied mapgen

mapgen.lua

 
 -- Generate new foods on map
 
-minetest.register_on_generated(function(minp, maxp, seed)
+function farming.mgv6ongen(minp, maxp, seed)
+
+	if maxp.y < 2 and minp.y > 0 then return end
 
 	local perlin1 = minetest.get_perlin(329, 3, 0.6, 100)
 
 	-- Assume X and Z lengths are equal
 	local divlen = 16
-	local divs = (maxp.x-minp.x)/divlen+1;
+	local divs = (maxp.x-minp.x)/divlen+1
 
 	for divx=0,divs-1 do
 		for divz=0,divs-1 do
@@ -18,12 +20,12 @@ minetest.register_on_generated(function(minp, maxp, seed)
 			local z1 = minp.z + math.floor((divz+1)*divlen)
 
 			-- Determine plant amount from perlin noise
-			local grass_amount = math.floor(perlin1:get2d({x=x0, y=z0}) ^ 3 * 9)
+			local plant_amount = math.floor(perlin1:get2d({x=x0, y=z0}) ^ 3 * 9)
 
-			-- Find random positions for plant based on this random
-			local pr = PseudoRandom(seed+1)
+			-- Find random positions for plant
+			local pr = PseudoRandom(seed+420)
 
-			for i=0,grass_amount do
+			for i=0,plant_amount do
 
 				local x = pr:next(x0, x1)
 				local z = pr:next(z0, z1)
@@ -44,37 +46,44 @@ minetest.register_on_generated(function(minp, maxp, seed)
 					local nn = minetest.get_node(p).name
 
 					-- Check if the node can be replaced
-					if minetest.registered_nodes[nn] and
+					if minetest.registered_nodes[nn]
+					and minetest.registered_nodes[nn].buildable_to then
 
-						minetest.registered_nodes[nn].buildable_to then
 						nn = minetest.get_node({x=x,y=ground_y,z=z}).name
 
 						-- If dirt with grass, add plant in various stages of maturity
 						if nn == "default:dirt_with_grass" then
 						
 							local type = math.random(1,11)
+							local plant
+
 							if type == 1 and ground_y > 15 then
-								minetest.set_node(p,{name="farming:potato_"..pr:next(3, 4)})
+								plant = "farming:potato_"..pr:next(3, 4)
 							elseif type == 2 then
-								minetest.set_node(p,{name="farming:tomato_"..pr:next(7, 8)})
+								plant = "farming:tomato_"..pr:next(7, 8)
 							elseif type == 3 then
-								minetest.set_node(p,{name="farming:carrot_"..pr:next(7, 8)})
+								plant = "farming:carrot_"..pr:next(7, 8)
 							elseif type == 4 then
-								minetest.set_node(p,{name="farming:cucumber_4"})
+								plant = "farming:cucumber_4"
 							elseif type == 5 then
-								minetest.set_node(p,{name="farming:corn_"..pr:next(7, 8)})
+								plant = "farming:corn_"..pr:next(7, 8)
 							elseif type == 6 and ground_y > 20 then
-								minetest.set_node(p,{name="farming:coffee_5"})
+								plant = "farming:coffee_5"
 							elseif type == 7 and minetest.find_node_near(p, 3, {"group:water"}) then
-								minetest.set_node(p,{name="farming:melon_8"})
+								plant = "farming:melon_8"
 							elseif type == 8 and ground_y > 15 then
-								minetest.set_node(p,{name="farming:pumpkin_8"})
+								plant = "farming:pumpkin_8"
 							elseif type == 9 and ground_y > 5 then
-								minetest.set_node(p,{name="farming:raspberry_4"})
+								plant = "farming:raspberry_4"
 							elseif type == 10 and ground_y > 10 then
-								minetest.set_node(p,{name="farming:rhubarb_3"})
+								plant = "farming:rhubarb_3"
 							elseif type == 11 and ground_y > 5 then
-								minetest.set_node(p,{name="farming:blueberry_4"})
+								plant = "farming:blueberry_4"
+							end
+
+							-- Add plant
+							if plant then
+								minetest.set_node(p, {name=plant})
 							end
 						end
 					end
@@ -82,4 +91,12 @@ minetest.register_on_generated(function(minp, maxp, seed)
 			end
 		end
 	end
+end
+
+-- Enable in mapgen v6 only (disabled)
+
+minetest.register_on_mapgen_init(function(mg_params)
+	--if mg_params.mgname == "v6" then
+		minetest.register_on_generated(farming.mgv6ongen)
+	--end
 end)