Refactor weapon system: implement WeaponHandler to manage LorentzField and prepare for additional weapons; update shader to incorporate lorentz_field uniform for visual effects.

game/weapons/lorentz_field.rb

@@ -1,16 +1,56 @@
-class LorentzField < Weapon
+class LorentzField
+  BASE_TIME = 25 # Base time for the field to be active in seconds
+
   def initialize
-    super(
-      name: "Lorentz Field",
-      description: "A defensive weapon that creates a time distortion field around the user. While active, the field slows down incoming projectiles and enemies, giving the user a chance to react and evade. The field lasts for a short duration and has a cooldown period before it can be used again.",
-      image_path: "assets/images/lorentz_field.png",
-      cooldown: 5.0,
-      damage: 0,
-      range: 0,
-      area_of_effect: 0
-    )
+    @time = 0
+    @active = false
+    @font = Gosu::Font.new(24, name: "assets/fonts/tn.ttf")
+
+    $bus.on(:lorentz_field) do
+      if @active
+        t = @time
+        remaining = BASE_TIME - t
+
+        if t < 4
+          # fade in
+          next t / 4.0
+        elsif remaining < 4
+          # fade out
+          next remaining / 4.0
+        else
+          # fully active
+          next 1.0
+        end
+      else
+        next 0.0
+      end
+    end
   end
 
-  def activate(user)
+  def attack
+    return if @active
+    $bus.emit(:consume, :lorentz_field, 1)
+    @active = true
+    @time = 0
+  end
+
+  def update(dt)
+    return unless @active
+
+    @time += dt
+    if @time >= BASE_TIME
+      @time = 0
+      @active = false
+    end
+  end
+
+  def draw
+    # for now draw the time
+    return unless @active
+
+    remaining = BASE_TIME - @time
+    text = "Lorentz Field: #{remaining.round(1)}s"
+
+    @font.draw_text(text, SCREEN_SIZE[0] / 2 - @font.text_width(text) / 2, 10, Float::INFINITY, 1, 1, Gosu::Color::CYAN)
   end
 end