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Appendix 2: Adding Rooms to the Game

Explore how to expand your Elixir game by adding interactive rooms with custom triggers such as traps, healing treasures, hidden enemies, and resting spots. Learn to implement these features to create engaging challenges and enhance gameplay dynamics in your functional programming projects.

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A game where you only face an enemy and find an exit isn’t that interesting. A game should have more challenges and places to explore. You can use your imagination to create additional interesting ideas for the game you built in Chapter 7, Designing Your Elixir Applications. Here are some suggestions that you can implement in your game.

Trap trigger

C++
defmodule DungeonCrawl.Room.Triggers.Trap do 
  alias DungeonCrawl.Room.Action
  alias Mix.Shell.IO, as: Shell
  @behaviour DungeonCrawl.Room.Trigger
  def run(character, %Action{id: :forward}) do
    Shell.info("You're walking cautiously and can see the next room.") 
    {character, :forward}
  end
  def run(character, %Action{id: :search}) do
    damage = 3
    Shell.info("You search the room looking for something useful.") 
    Shell.info("You step on a false floor and fall into a trap.") 
    Shell.info("You are hit by an arrow, losing #{damage} hit points.")
    {
      DungeonCrawl.Character.take_damage(character, damage), 
      :forward
    }
  end
end

The ...