Moved camera into its own class, added CommonMethods for gosu methods outside of window.

2025-12-15 23:52:35 +00:00 · 2018-03-20 19:25:06 -05:00
parent 7aef9b179a
commit 57c52cd725
5 changed files with 137 additions and 93 deletions
--- a/lib/objects/camera.rb
+++ b/lib/objects/camera.rb
@@ -0,0 +1,110 @@
+class IMICFPS
+  class Camera
+    include CommonMethods
+    include OpenGL
+    include GLU
+
+    attr_accessor :x,:y,:z, :field_of_view, :vertical_angle, :horizontal_angle, :mouse_sensitivity
+    def initialize(x: 0, y: 0, z: 0, fov: 70.0)
+      @x,@y,@z = x,y,z
+      @vertical_angle = 0.0
+      @horizontal_angle = 0.0
+      @field_of_view = fov
+
+      @speed = 0.05
+      @old_speed = @speed
+      self.mouse_x, self.mouse_y = Gosu.screen_width/2, Gosu.screen_height/2
+      @true_mouse = Point.new(Gosu.screen_width/2, Gosu.screen_height/2)
+      @true_mouse_checked = 0
+      @mouse_sensitivity = 20.0
+    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, 1000.0)
+      glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST)
+
+      glMatrixMode(GL_MODELVIEW) # The modelview matrix is where object information is stored.
+      glLoadIdentity
+
+      glEnable(GL_DEPTH_TEST)
+
+      glRotatef(@vertical_angle,1,0,0)
+      glRotatef(@horizontal_angle,0,1,0)
+      glTranslatef(@x, @y, @z)
+    end
+
+    def update
+      if @true_mouse_checked > 2
+        @horizontal_angle-=Float(@true_mouse.x-self.mouse_x)/(@mouse_sensitivity*@field_of_view)*70
+        @vertical_angle-=Float(@true_mouse.y-self.mouse_y)/(@mouse_sensitivity*@field_of_view)*70
+        @horizontal_angle %= 360.0
+        @vertical_angle = @vertical_angle.clamp(-90.0, 90.0)
+      else
+        @true_mouse_checked+=1
+        @true_mouse.x = self.mouse_x
+        @true_mouse.y = self.mouse_y
+      end
+
+      self.mouse_x, self.mouse_y = Gosu.screen_width/2.0, Gosu.screen_height/2.0
+      @true_mouse_checked = 0 if (button_down?(Gosu::KbLeftAlt) && (button_down?(Gosu::KbEnter) || button_down?(Gosu::KbReturn)))
+      @true_mouse_checked = 0 if (button_down?(Gosu::KbRightAlt) && (button_down?(Gosu::KbEnter) || button_down?(Gosu::KbReturn)))
+
+      relative_speed = @speed
+      if button_down?(Gosu::KbLeftControl)
+        relative_speed = (@speed*10.0)*(delta_time/60.0)
+      else
+        relative_speed = @speed*(delta_time/60.0)
+      end
+
+      if button_down?(Gosu::KbUp) || button_down?(Gosu::KbW)
+        @z+=Math.cos(@horizontal_angle * Math::PI / 180)*relative_speed
+        @x-=Math.sin(@horizontal_angle * Math::PI / 180)*relative_speed
+      end
+      if button_down?(Gosu::KbDown) || button_down?(Gosu::KbS)
+        @z-=Math.cos(@horizontal_angle * Math::PI / 180)*relative_speed
+        @x+=Math.sin(@horizontal_angle * Math::PI / 180)*relative_speed
+      end
+      if button_down?(Gosu::KbA)
+        @z+=Math.sin(@horizontal_angle * Math::PI / 180)*relative_speed
+        @x+=Math.cos(@horizontal_angle * Math::PI / 180)*relative_speed
+      end
+      if button_down?(Gosu::KbD)
+        @z-=Math.sin(@horizontal_angle * Math::PI / 180)*relative_speed
+        @x-=Math.cos(@horizontal_angle * Math::PI / 180)*relative_speed
+      end
+
+      if button_down?(Gosu::KbLeft)
+        @horizontal_angle-=relative_speed*100
+      end
+      if button_down?(Gosu::KbRight)
+        @horizontal_angle+=relative_speed*100
+      end
+
+      @y+=relative_speed if button_down?(Gosu::KbC) || button_down?(Gosu::KbLeftShift)
+      @y-=relative_speed if button_down?(Gosu::KbSpace)
+    end
+
+    def button_up(id)
+      case id
+      when Gosu::KB_NUMPAD_PLUS
+        @mouse_sensitivity+=1
+        @mouse_sensitivity = @mouse_sensitivity.clamp(1.0, 100.0)
+      when Gosu::KbMinus, Gosu::KB_NUMPAD_MINUS
+        @mouse_sensitivity-=1
+        @mouse_sensitivity = @mouse_sensitivity.clamp(1.0, 100.0)
+      when Gosu::KB_NUMPAD_MULTIPLY
+        @mouse_sensitivity = 20.0
+      when Gosu::MsWheelUp
+        @field_of_view += 1
+        @field_of_view = @field_of_view.clamp(1, 179)
+      when Gosu::MsWheelDown
+        @field_of_view -= 1
+        @field_of_view = @field_of_view.clamp(1, 179)
+      end
+    end
+  end
+end