1 files changed, 125 insertions, 0 deletions
diff --git a/lib/camera/camera.rb b/lib/camera/camera.rb
new file mode 100644
index 0000000..64e2095
--- /dev/null
+++ b/lib/camera/camera.rb
@@ -0,0 +1,125 @@
+# frozen_string_literal: true
+
+Dir[File.join(__dir__, 'wrappers', '*.rb')].sort.each { |file| require file }
+
+# Handles rendering objects relative
+# to a camera location
+module Camera
+  class <<self
+
+    private
+    # Contains all objects that are tracked
+    def objects
+      @objects ||= []
+    end
+  end
+
+  def self.debug_x
+    @debug_x ||= 0
+  end
+
+  def self.debug_x=(debug_x)
+    @debug_x = debug_x
+  end
+
+  def self.debug_y
+    @debug_y ||= 0
+  end
+
+  def self.debug_y=(debug_y)
+    @debug_y = debug_y
+  end
+
+  # Adding objects so they are
+  # tracked by the Camera
+  def self.<<(item)
+    case item
+    when Triangle
+      item.extend Camera::TriangleWrapped
+    when Square
+      item.extend Camera::SquareWrapped
+    when Rectangle
+      item.extend Camera::RectangleWrapped
+    when Quad
+      item.extend Camera::QuadWrapped
+    when Line
+      item.extend Camera::LineWrapped
+    when Circle
+      item.extend Camera::CircleWrapped
+    when Image
+      item.extend Camera::ImageWrapped
+    when Sprite
+      item.extend Camera::SpriteWrapped
+    when Text
+      item.extend Camera::TextWrapped
+    else
+      puts 'Warning: Non-standard Object added to Camera'
+      puts '  Object may not behave as expected'
+    end
+    objects.push(item) unless objects.include?(item)
+  end
+
+  def self.remove(item)
+    objects.delete(item) if objects.include?(item)
+  end
+
+  # Redraw all objects that
+  # are tracked by the Camera
+  def self.redraw(auto_purge: false)
+    if auto_purge
+      objects.each do |item|
+        if item.nil?
+          puts "Warning: Nil Object detected in Camera"
+          puts "  Nil Object removed"
+          objects.delete(obj)
+        else
+          item.redraw
+        end
+      end
+    else
+      objects.each(&:redraw)
+    end
+  end
+
+  # Variables changing Camera properties
+  def self._x(x)
+    @x += x
+  end
+
+  def self._y(y)
+    @y += y
+  end
+
+  def self.x
+    @x ||= 0
+  end
+
+  def self.x=(x)
+    @x = x
+  end
+
+  def self.y
+    @y ||= 0
+  end
+
+  def self.y=(y)
+    @y = y
+  end
+
+  def self.zoom
+    @zoom ||= 1.0
+  end
+
+  def self.zoom=(zoom)
+    @zoom = zoom
+  end
+
+  def self.angle
+    @angle ||= 0
+  end
+
+  def self.angle=(angle)
+    angle %= 360
+    @angle = angle
+  end
+end