Renamed objects/ to game_objects/ removed redundant entities, added Map loader and test map, made LoadingState use Map for entity asset loading.

lib/game_objects/camera.rb

@@ -0,0 +1,171 @@
+class IMICFPS
+  class Camera
+    include CommonMethods
+
+    attr_accessor :field_of_view, :mouse_sensitivity
+    attr_reader :entity, :position, :orientation, :mouse_captured
+    def initialize(position:, orientation: Vector.new(0, 0, 0), fov: 70.0, view_distance: 155.0)
+      @position = position
+      @orientation = orientation
+      @field_of_view = fov
+      @view_distance = view_distance
+      @constant_pitch = 20.0
+
+      @entity = nil
+      @distance = 4
+      @origin_distance = @distance
+
+      self.mouse_x, self.mouse_y = window.width / 2, window.height / 2
+      @true_mouse = Point.new(window.width / 2, window.height / 2)
+      @mouse_sensitivity = 20.0 # Less is faster, more is slower
+      @mouse_captured = true
+      @mouse_checked = 0
+    end
+
+    def attach_to(entity)
+      raise "Not an Entity!" unless entity.is_a?(Entity)
+      @entity = entity
+      @entity.attach_camera(self)
+    end
+
+    def detach
+      @entity.detach_camera
+      @entity = nil
+    end
+
+    def distance_from_object
+      @distance
+    end
+
+    def horizontal_distance_from_object
+      distance_from_object * Math.cos(@constant_pitch)
+    end
+
+    def vertical_distance_from_object
+      distance_from_object * Math.sin(@constant_pitch)
+    end
+
+    def position_camera
+      if defined?(@entity.first_person_view)
+        if @entity.first_person_view
+          @distance = 0
+        else
+          @distance = @origin_distance
+        end
+      end
+
+      x_offset = horizontal_distance_from_object * Math.sin(@entity.orientation.y.degrees_to_radians)
+      z_offset = horizontal_distance_from_object * Math.cos(@entity.orientation.y.degrees_to_radians)
+
+      @position.x = @entity.position.x - x_offset
+      @position.y = @entity.position.y + 2
+      @position.z = @entity.position.z - z_offset
+
+      @orientation.y = 180 - @entity.orientation.y
+    end
+
+    def draw
+      #glMatrixMode(matrix) indicates that following [matrix] is going to get used
+      glMatrixMode(GL_PROJECTION) # The projection matrix is responsible for adding perspective to our scene.
+      glLoadIdentity # Resets current modelview matrix
+      # Calculates aspect ratio of the window. Gets perspective  view. 45 is degree viewing angle, (0.1, 100) are ranges how deep can we draw into the screen
+      gluPerspective(@field_of_view, window.width / window.height, 0.1, @view_distance)
+      glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST)
+      glRotatef(@orientation.z, 1, 0, 0)
+      glRotatef(@orientation.y, 0, 1, 0)
+      glTranslatef(-@position.x, -@position.y, -@position.z)
+      glMatrixMode(GL_MODELVIEW) # The modelview matrix is where object information is stored.
+      glLoadIdentity
+
+    end
+
+    def update
+      if @mouse_captured
+
+        delta = Float(@true_mouse.x - self.mouse_x) / (@mouse_sensitivity * @field_of_view) * 70
+        @orientation.y -= delta
+        @orientation.y %= 360.0
+
+        @orientation.z -= Float(@true_mouse.y - self.mouse_y) / (@mouse_sensitivity * @field_of_view) * 70
+        @orientation.z = @orientation.z.clamp(-90.0, 90.0)
+
+        if @entity
+          @entity.orientation.y += delta
+          @entity.orientation.y %= 360
+          position_camera
+        else
+          free_move
+        end
+
+        self.mouse_x = window.width  / 2 if self.mouse_x <= 1 || window.mouse_x >= window.width-1
+        self.mouse_y = window.height / 2 if self.mouse_y <= 1 || window.mouse_y >= window.height-1
+        @true_mouse.x, @true_mouse.y = self.mouse_x, self.mouse_y
+      end
+    end
+
+    def looking_at
+      ray = Ray.new(@position, @orientation.direction * -1)
+      window.current_state.collision_manager.search(ray)
+    end
+
+    def free_move
+      relative_y_rotation = (@orientation.y + 180)
+      relative_speed = 0.25
+
+      if InputMapper.down?( :forward)
+        @position.z+=Math.cos(relative_y_rotation * Math::PI / 180)*relative_speed
+        @position.x-=Math.sin(relative_y_rotation * Math::PI / 180)*relative_speed
+      end
+
+      if InputMapper.down?(:backward)
+        @position.z-=Math.cos(relative_y_rotation * Math::PI / 180)*relative_speed
+        @position.x+=Math.sin(relative_y_rotation * Math::PI / 180)*relative_speed
+      end
+
+      if InputMapper.down?(:strife_left)
+        @position.z+=Math.sin(relative_y_rotation * Math::PI / 180)*relative_speed
+        @position.x+=Math.cos(relative_y_rotation * Math::PI / 180)*relative_speed
+      end
+
+      if InputMapper.down?(:strife_right)
+        @position.z-=Math.sin(relative_y_rotation * Math::PI / 180)*relative_speed
+        @position.x-=Math.cos(relative_y_rotation * Math::PI / 180)*relative_speed
+      end
+
+      if InputMapper.down?(:ascend)
+        @position.y+=relative_speed
+      end
+      if InputMapper.down?(:descend)
+        @position.y-=relative_speed
+      end
+    end
+
+    def button_up(id)
+      if InputMapper.is?(:release_mouse, id)
+        @mouse_captured = false
+        window.needs_cursor = true
+      elsif InputMapper.is?(:capture_mouse, id)
+        @mouse_captured = true
+        window.needs_cursor = false
+      elsif InputMapper.is?(:increase_mouse_sensitivity, id)
+        @mouse_sensitivity+=1
+        @mouse_sensitivity = @mouse_sensitivity.clamp(1.0, 100.0)
+      elsif InputMapper.is?(:decrease_mouse_sensitivity, id)
+        @mouse_sensitivity-=1
+        @mouse_sensitivity = @mouse_sensitivity.clamp(1.0, 100.0)
+      elsif InputMapper.is?(:reset_mouse_sensitivity, id)
+        @mouse_sensitivity = 20.0
+      elsif InputMapper.is?(:increase_view_distance, id)
+        # @field_of_view += 1
+        # @field_of_view = @field_of_view.clamp(1, 100)
+        @view_distance += 1
+        @view_distance = @view_distance.clamp(1, 1000)
+      elsif InputMapper.is?(:decrease_view_distance, id)
+        # @field_of_view -= 1
+        # @field_of_view = @field_of_view.clamp(1, 100)
+        @view_distance -= 1
+        @view_distance = @view_distance.clamp(1, 1000)
+      end
+    end
+  end
+end