Extra error checking.

wallhammer.lua

@@ -23,34 +23,11 @@ local default_material = {
 		}
 
 local function parti(pos)
-  	minetest.add_particlespawner(25, 0.3,
-		pos, pos,
-		{x=2, y=0.2, z=2}, {x=-2, y=2, z=-2},
-		{x=0, y=-6, z=0}, {x=0, y=-10, z=0},
-		0.2, 1,
-		0.2, 2,
-		true, "wallhammer_parti.png")
-end
-
-local function get_pointed_thing(player, range)
-	local plpos = player:getpos()
-	plpos.y = plpos.y+1.625
-	local dir = player:get_look_dir()
-	local p2 = vector.add(plpos, vector.multiply(dir, range))
-	local _,pos = minetest.line_of_sight(plpos, p2)
 	if not pos then
 		return
 	end
-	local check = minetest.get_node(pos)
-	if string.find(check.name, '_foot') then
-		pos = vector.add(pos, dir)
-		print('added')
-	end
-	return {
-		under = vector.round(pos),
-		above = vector.round(vector.subtract(pos, dir)),
-		type = "node"
-	}
+
+	minetest.add_particlespawner(25, 0.3, pos, pos, {x=2, y=0.2, z=2}, {x=-2, y=2, z=-2}, {x=0, y=-6, z=0}, {x=0, y=-10, z=0}, 0.2, 1, 0.2, 2, true, "wallhammer_parti.png")
 end
 
 minetest.register_tool( "fun_caves:wall_hammer",{
@@ -66,13 +43,23 @@ minetest.register_tool( "fun_caves:wall_hammer",{
 		damage_groups = {fleshy=4},
 	},
 	on_use = function(itemstack, user, pointed_thing)
+		if not (pointed_thing and user and itemstack) then
+			return
+		end
 
 		if pointed_thing.type ~= "node" then
 			return
 		end
 
 		local pos = pointed_thing.under
+		if not pos then
+			return
+		end
+
 		local node = minetest.get_node(pos)
+		if not node then
+			return
+		end
 
 		for i in ipairs (default_material) do
 			local item = default_material [i][1]
@@ -85,7 +72,11 @@ minetest.register_tool( "fun_caves:wall_hammer",{
 			end
 
 			if node.name == item then
-				minetest.set_node(pos,{name = "fun_caves:"..mat.."_foot", param2=minetest.dir_to_facedir(user:get_look_dir())})
+				local node = {
+					name = "fun_caves:"..mat.."_foot",
+					param2=minetest.dir_to_facedir(user:get_look_dir())
+				}
+				minetest.set_node(pos, node)
 				parti(pos)
 			end
 		end