fix #x

init.lua

@@ -4,21 +4,31 @@ minetest.register_node("landscape:full_grass_block", {
 	description = "Dirt with Grass",
 	tiles = {"default_grass.png"},
 	is_ground_content = true,
-	groups = {crumbly=3},
+	groups = {crumbly=3, not_in_creative=1},
 	drop = 'default:dirt',
 	sounds = default.node_sound_dirt_defaults({
 		footstep = {name="default_grass_footstep", gain=0.4},
 	}),
 })
 
+function check_reg(set, key)
+    return set[key] ~= nil
+end
+
 local function get_type(pos)  --1 for left, 2 for right, 3 for behind, 4 for front
-	if minetest.registered_nodes[minetest.env:get_node({x=pos.x+1, y=pos.y, z=pos.z}).name].walkable == false then
+	local l1 = minetest.env:get_node({x=pos.x+1, y=pos.y, z=pos.z}).name
+	local l2 = minetest.env:get_node({x=pos.x, y=pos.y, z=pos.z+1}).name
+	local r1 = minetest.env:get_node({x=pos.x-1, y=pos.y, z=pos.z}).name
+	local r2 = minetest.env:get_node({x=pos.x, y=pos.y, z=pos.z-1}).name
+	if l1 == nil or l2 == nil or r1 == nil or r2 == nil then return end
+	if not check_reg(minetest.registered_nodes, l1) or not check_reg(minetest.registered_nodes, r1) or not check_reg(minetest.registered_nodes, l2) or not check_reg(minetest.registered_nodes, r2) then return end
+	if l1 == "air" or not minetest.registered_nodes[l1].walkable then
 		return 1
-	elseif minetest.registered_nodes[minetest.env:get_node({x=pos.x-1, y=pos.y, z=pos.z}).name].walkable == false then
+	elseif r1 == "air" or not minetest.registered_nodes[r1].walkable then
 		return 2
-	elseif minetest.registered_nodes[minetest.env:get_node({x=pos.x, y=pos.y, z=pos.z+1}).name].walkable == false then
+	elseif l2 == "air" or not minetest.registered_nodes[l2].walkable then
 		return 3
-	elseif minetest.registered_nodes[minetest.env:get_node({x=pos.x, y=pos.y, z=pos.z-1}).name].walkable == false then
+	elseif r2 == "air" or not minetest.registered_nodes[r2].walkable then
 		return 4
 	else
 		return 0
@@ -26,17 +36,19 @@ local function get_type(pos)  --1 for left, 2 for right, 3 for behind, 4 for fro
 end
 
 local function is_edge(pos)
-	local l1 = {x=pos.x-1, y=pos.y, z=pos.z}
-	local l2 = {x=pos.x, y=pos.y, z=pos.z-1}
-	local r1 = {x=pos.x+1, y=pos.y, z=pos.z}
-	local r2 = {x=pos.x, y=pos.y, z=pos.z+1}
-	if minetest.registered_nodes[minetest.env:get_node(l1).name].walkable == false or
-	minetest.registered_nodes[minetest.env:get_node(l2).name].walkable == false or
-	minetest.registered_nodes[minetest.env:get_node(r1).name].walkable == false or
-	minetest.registered_nodes[minetest.env:get_node(r2).name].walkable == false then
+	local l1 = minetest.env:get_node({x=pos.x-1, y=pos.y, z=pos.z}).name
+	local l2 = minetest.env:get_node({x=pos.x, y=pos.y, z=pos.z-1}).name
+	local r1 = minetest.env:get_node({x=pos.x+1, y=pos.y, z=pos.z}).name
+	local r2 = minetest.env:get_node({x=pos.x, y=pos.y, z=pos.z+1}).name
+	if l1 == nil or l2 == nil or r1 == nil or r2 == nil then return end
+	if not check_reg(minetest.registered_nodes, l1) or not check_reg(minetest.registered_nodes, r1) or not check_reg(minetest.registered_nodes, l2) or not check_reg(minetest.registered_nodes, r2) then return end
+	if l1 == "air" or not minetest.registered_nodes[l1] or
+	l2 == "air" or not minetest.registered_nodes[l2].walkable or
+	l3 == "air" or not minetest.registered_nodes[r1].walkable or
+	l4 == "air" or not minetest.registered_nodes[r2].walkable then
 		return true
 	end
-	
+
 end
 
 local function check(pos)
@@ -61,7 +73,10 @@ if remove_full_grass == false then
 			local under_front2 = {x=pos.x, y=pos.y-1, z=pos.z+1}
 			local under_back = {x=pos.x-1, y=pos.y-1, z=pos.z}
 			local under_back2 = {x=pos.x, y=pos.y-1, z=pos.z-1}
-			if minetest.registered_nodes[minetest.env:get_node(above).name].walkable == false then
+			local n = minetest.env:get_node(above).name
+			if n == nil then return end
+			if not check_reg(minetest.registered_nodes, n) then return end
+			if n == "air" or not minetest.registered_nodes[n].walkable then
 			if get_type(pos) ~= 0 then
 				local typ = get_type(pos)
 				local ok = false
@@ -78,17 +93,15 @@ if remove_full_grass == false then
 					if minetest.env:get_node(under).name == "default:dirt" then 
 						if not is_edge(under) then
 					--IF GRAS UNTEN-DAVOR tthen....
-							local tmp_node3 = {name="landscape:full_grass_block"}
-							minetest.env:set_node(pos, tmp_node3)	
+							minetest.env:set_node(pos, {name="landscape:full_grass_block"})	
 						end
 					else
-						local tmp_node3 = {name="landscape:full_grass_block"}
-						minetest.env:set_node(pos, tmp_node3)
+						minetest.env:set_node(pos, {name="landscape:full_grass_block"})
 					end
 				end
 			end
 			end
-			
+
 		end
 	})
 
@@ -98,9 +111,11 @@ if remove_full_grass == false then
 		interval = 2.0,
 		chance = 20,
 		action = function(pos, node, active_object_count, active_object_count_wider)
-		if minetest.registered_nodes[minetest.env:get_node({x=pos.x, y=pos.y+1, z=pos.z}).name].walkable == true then
-			local tmp_node3 = {name="default:dirt"}
-			minetest.env:set_node(pos, tmp_node3)
+		local n = minetest.env:get_node({x=pos.x, y=pos.y+1, z=pos.z}).name
+		if n == nil then return end
+		if not check_reg(minetest.registered_nodes, n) then return end
+		if n ~= "air" or minetest.registered_nodes[n].walkable then
+			minetest.env:set_node(pos, {name="default:dirt"})
 		end
 	end
 	})