Some progress towards sending the map

apps/amethyst/lib/api/game.ex

@@ -88,6 +88,15 @@ defmodule Amethyst.API.Game do
     mod.accept_teleport(self(), id, refs)
   end
   @doc """
+  The terrain of a specific chunk column. This is automatically used to load chunks for a player.
+
+  For now, this data must be formatted as a 3D list, indexed as [y][z][x].
+  """
+  @callback chunk(from :: pid(), {x :: integer(), z :: integer()}, state_refs :: map()) :: [[[pos_integer()]]]
+  def chunk(%{:mod => mod, :refs => refs}, pos) do
+    mod.chunk(self(), pos, refs)
+  end
+  @doc """
   Whether or not this game instance can be joined by a new player. This should include basic logic such as
   if joining makes sense, for instance if the game is full or if the game has already started.
   """

apps/amethyst/lib/apps/connection_handler.ex

@@ -119,8 +119,14 @@ defmodule Amethyst.ConnectionHandler do
     end)
   end
 
-  defp process_chunk(_chunk, _state) do
-    # TODO: Actually ask the game for the desired chunk then send the packets.
+  defp process_chunk(chunk, state) do
+    chunk_array = Amethyst.API.Game.chunk(Map.get(state, :game), chunk)
+
+    # TODO: Actually do heightmaps
+    import Amethyst.NBT.Write
+    heightmaps = compound(%{})
+
+    data = Enum.chunk_every(chunk_array, 16)
   end
 
   defp handle_packet(id, data, connstate, version, state) do

apps/example_game/lib/example/game.ex

@@ -12,7 +12,7 @@ defmodule Example.Game do
   def login(from, cfg, refs) do
     Logger.info("Player logged in from #{inspect(from)}: #{inspect(cfg)}")
     Logger.info("The refs for this game are #{inspect(refs)}")
-    {:accept, {0.0, 0.0, 0.0}, {0.0, 0.0}}
+    {:accept, {0.0, 10.0, 0.0}, {0.0, 0.0}}
   end
 
   @impl true
@@ -38,4 +38,20 @@ defmodule Example.Game do
   def joinable?(_refs) do
     true
   end
+
+  @impl true
+  def chunk(from, {x, z}, _state_refs) do
+    Logger.info("Player at #{inspect(from)} wants to know chunk #{x}, #{z}")
+    (0..255) |> Enum.map(fn y ->
+      if y < 5 do
+        (0..15) |> Enum.map(fn _z ->
+          (0..15) |> Enum.map(fn _x -> 1 end)
+        end)
+      else
+        (0..15) |> Enum.map(fn _z ->
+          (0..15) |> Enum.map(fn _x -> 0 end)
+        end)
+      end
+    end)
+  end
 end