Add Magnetite and Nether bedrock upper limit

mine.lua

@@ -267,6 +267,7 @@ local ORES = Set{
   "create:zinc_ore",
   "create:deepslate_zinc_ore",
   "create_new_age:thorium_ore",
+  "create_new_age:magnetite_block",
 
   "powah:deepslate_uraninite_ore_poor",
   "powah:deepslate_uraninite_ore",
@@ -423,15 +424,17 @@ end
 function Miner:safeNeighbors(p)
   local ns = {
     p + vector.new( 1,  0,  0),
-    p + vector.new( 0,  1,  0),
     p + vector.new( 0,  0,  1),
     p + vector.new(-1,  0,  0),
     p + vector.new( 0,  0, -1),
   }
-  -- only allow downwards if above bedrock
+  -- only allow downwards if above / below bedrock
   if (self.absolutePos - self.pos + p).y - 1 > -60 then
     table.insert(ns, p + vector.new(0, -1, 0))
   end
+  if self.dimension ~= "the_nether" or (self.absolutePos - self.pos + p).y + 1 < 123 then
+    table.insert(ns, p + vector.new(0, 1, 0))
+  end
 
   return ns
 end
@@ -494,7 +497,7 @@ function Miner:findOres(radius)
   local found = {}
   for _, b in ipairs(info) do
     -- only ores and avoid bedrock
-    if ORES[b.name] and self.absolutePos.y + b.y > -60 then
+    if ORES[b.name] and self.absolutePos.y + b.y > -60 and (self.dimension ~= "the_nether" or self.absolutePos.y + b.y < 123) then
       table.insert(found, b)
     end
   end