Moved OpenGL renderering code into its own class for future optimizations

i-mic-fps.rb

@@ -44,6 +44,7 @@ $debug = ARGV.join.include?("--debug") ? true : false
 require_relative "lib/common_methods"
 require_relative "lib/managers/object_manager"
 require_relative "lib/managers/light_manager"
+require_relative "lib/renderer/renderer"
 
 require_relative "lib/states/game_state"
 require_relative "lib/states/game_states/loading_state"

lib/objects/game_object.rb

@@ -60,26 +60,8 @@ class IMICFPS
     def setup
     end
 
+    # Not advisable to put OpenGL code here, instead put it in Renderer.
     def draw
-      handleGlError
-
-      glEnable(GL_NORMALIZE)
-      glPushMatrix
-      # Render bounding boxes before transformation is applied
-      render_bounding_box(model.bounding_box) if $debug
-      model.objects.each {|o| render_bounding_box(o.bounding_box, o.debug_color)} if $debug
-
-      glTranslatef(@x, @y, @z)
-      glRotatef(@x_rotation,1.0, 0, 0)
-      glRotatef(@y_rotation,0, 1.0, 0)
-      glRotatef(@z_rotation,0, 0, 1.0)
-
-      handleGlError
-      model.draw(@x, @y, @z, @scale, @backface_culling)
-      handleGlError
-
-      glPopMatrix
-      handleGlError
     end
 
     def update
@@ -117,162 +99,6 @@ class IMICFPS
       return temp
     end
 
-    def render_bounding_box(box, color = @debug_color)
-      box = normalize_bounding_box(box)
-
-      glEnableClientState(GL_VERTEX_ARRAY)
-      glEnableClientState(GL_COLOR_ARRAY)
-      glEnableClientState(GL_NORMAL_ARRAY)
-
-      _normals = [
-        0,1,0,
-        0,1,0,
-        0,1,0,
-        0,1,0,
-        0,1,0,
-        0,1,0,
-
-        0,-1,0,
-        0,-1,0,
-        0,-1,0,
-        0,-1,0,
-        0,-1,0,
-        0,-1,0,
-
-        0,0,1,
-        0,0,1,
-        0,0,1,
-        0,0,1,
-        0,0,1,
-        0,0,1,
-
-        1,0,0,
-        1,0,0,
-        1,0,0,
-        1,0,0,
-        1,0,0,
-        1,0,0,
-
-        -1,0,0,
-        -1,0,0,
-        -1,0,0,
-        -1,0,0,
-        -1,0,0,
-        -1,0,0,
-
-        -1,0,0,
-        -1,0,0,
-        -1,0,0,
-
-        -1,0,0,
-        -1,0,0,
-        -1,0,0
-      ].pack("f*")
-      _colors  = [
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue,
-        color.red, color.green, color.blue
-      ].pack("f*")
-      _vertices = [
-        box.min_x, box.max_y, box.max_z,
-        box.min_x, box.max_y, box.min_z,
-        box.max_x, box.max_y, box.min_z,
-
-        box.min_x, box.max_y, box.max_z,
-        box.max_x, box.max_y, box.max_z,
-        box.max_x, box.max_y, box.min_z,
-
-        box.max_x, box.min_y, box.min_z,
-        box.max_x, box.min_y, box.max_z,
-        box.min_x, box.min_y, box.max_z,
-
-        box.max_x, box.min_y, box.min_z,
-        box.min_x, box.min_y, box.min_z,
-        box.min_x, box.min_y, box.max_z,
-
-        box.min_x, box.max_y, box.max_z,
-        box.min_x, box.max_y, box.min_z,
-        box.min_x, box.min_y, box.min_z,
-
-        box.min_x, box.min_y, box.max_z,
-        box.min_x, box.min_y, box.min_z,
-        box.min_x, box.max_y, box.max_z,
-
-        box.max_x, box.max_y, box.max_z,
-        box.max_x, box.max_y, box.min_z,
-        box.max_x, box.min_y, box.min_z,
-
-        box.max_x, box.min_y, box.max_z,
-        box.max_x, box.min_y, box.min_z,
-        box.max_x, box.max_y, box.max_z,
-
-        box.min_x, box.max_y, box.max_z,
-        box.max_x, box.max_y, box.max_z,
-        box.max_x, box.min_y, box.max_z,
-
-        box.min_x, box.max_y, box.max_z,
-        box.max_x, box.min_y, box.max_z,
-        box.min_x, box.min_y, box.max_z,
-
-        box.max_x, box.min_y, box.min_z,
-        box.min_x, box.min_y, box.min_z,
-        box.min_x, box.max_y, box.min_z,
-
-        box.max_x, box.min_y, box.min_z,
-        box.min_x, box.max_y, box.min_z,
-        box.max_x, box.max_y, box.min_z
-      ]
-      _vertices_size = _vertices.size
-      _vertices = _vertices.pack("f*")
-
-      glVertexPointer(3, GL_FLOAT, 0, _vertices)
-      glColorPointer(3, GL_FLOAT, 0, _colors)
-      glNormalPointer(GL_FLOAT, 0, _normals)
-
-      glPolygonMode(GL_FRONT_AND_BACK, GL_LINE)
-      glDisable(GL_LIGHTING)
-      glDrawArrays(GL_TRIANGLES, 0, _vertices_size/3)
-      glEnable(GL_LIGHTING)
-      glPolygonMode(GL_FRONT_AND_BACK, GL_FILL)
-
-      glDisableClientState(GL_VERTEX_ARRAY)
-      glDisableClientState(GL_COLOR_ARRAY)
-      glDisableClientState(GL_NORMAL_ARRAY)
-    end
-
     def handleGlError
       e = glGetError()
       if e != GL_NO_ERROR

lib/objects/player.rb

@@ -38,8 +38,7 @@ class IMICFPS
     def draw_nameplate
       _height = (@name_image.height/@devisor)
       _width = (@name_image.width/@devisor)/2
-      _x = @x
-      _y = normalize_bounding_box(model.bounding_box).max_y+0.05
+      _y = 2#normalize_bounding_box(model.bounding_box).max_y+0.05
       glPushMatrix
       glDisable(GL_LIGHTING)
       glEnable(GL_COLOR_MATERIAL)
@@ -51,27 +50,27 @@ class IMICFPS
         glColor3f(1.0,1.0,1.0)
         # TOP LEFT
         glTexCoord2f(0, 0)
-        glVertex3f(_x-_width,_y+_height,@z)
+        glVertex3f(0-_width,_y+_height,0)
 
         # TOP RIGHT
         glTexCoord2f(1, 0)
-        glVertex3f(_x+_width, _y+_height,@z)
+        glVertex3f(0+_width, _y+_height,0)
 
         # BOTTOM LEFT
         glTexCoord2f(0, 1)
-        glVertex3f(_x-_width,_y,@z)
+        glVertex3f(0-_width,_y,0)
 
         # BOTTOM LEFT
         glTexCoord2f(0, 1)
-        glVertex3f(_x-_width,_y,@z)
+        glVertex3f(0-_width,_y,0)
 
         # BOTTOM RIGHT
         glTexCoord2f(1, 1)
-        glVertex3f(_x+_width, _y,@z)
+        glVertex3f(0+_width, _y,0)
 
         # TOP RIGHT
         glTexCoord2f(1, 0)
-        glVertex3f(_x+_width,_y+_height,@z)
+        glVertex3f(0+_width,_y+_height,0)
       glEnd
       # glDisable(GL_BLEND)
       glDisable(GL_TEXTURE_2D)

lib/objects/terrain.rb

@@ -2,6 +2,7 @@ class IMICFPS
   class Terrain < GameObject
     def setup
       bind_model(ModelLoader.new(type: :obj, file_path: "objects/randomish_terrain.obj", game_object: self))
+      # bind_model(ModelLoader.new(type: :obj, file_path: "/home/cyberarm/Documents/blends/untitled.obj", game_object: self))
       self.scale = 1
       @nearest_vertex_lookup = {}
 

lib/objects/tree.rb

@@ -3,9 +3,11 @@ class IMICFPS
     def setup
       bind_model(ModelLoader.new(type: :obj, file_path: "objects/tree.obj", game_object: self))
       vert = @terrain.find_nearest_vertex(self, 4.5)
-      self.x = vert.x
-      self.y = vert.y
-      self.z = vert.z
+      if vert
+        self.x = vert.x
+        self.y = vert.y
+        self.z = vert.z
+      end
     end
 
     # def update

lib/renderer/renderer.rb

@@ -0,0 +1,274 @@
+class IMICFPS
+  class Renderer
+    include OpenGL
+    include GLU
+
+    def initialize
+      @bounding_boxes = {normals: [], colors: [], vertices: []}
+    end
+
+    def draw
+      i = 0
+      draw_bounding_boxes if $debug
+      $window.number_of_faces+=@bounding_boxes[:vertices].size/3 if $debug
+      @bounding_boxes.clear
+      ObjectManager.objects.each do |object|
+        if object.visible && object.renderable
+          draw_object(object)
+          i+=1
+        end
+      end
+
+    end
+
+    def draw_object(object)
+      handleGlError
+
+      glEnable(GL_NORMALIZE)
+      glPushMatrix
+      # Render bounding boxes before transformation is applied
+      create_bounding_box(object, object.model.bounding_box) if $debug
+      object.model.objects.each {|o| create_bounding_box(object, o.bounding_box, o.debug_color)} if $debug
+
+      glTranslatef(object.x, object.y, object.z)
+      glRotatef(object.x_rotation,1.0, 0, 0)
+      glRotatef(object.y_rotation,0, 1.0, 0)
+      glRotatef(object.z_rotation,0, 0, 1.0)
+
+      handleGlError
+      draw_mesh(object.model)
+      object.draw
+      # object.model.draw(object.x, object.y, object.z, object.scale, object.backface_culling)
+      handleGlError
+
+      glPopMatrix
+      handleGlError
+    end
+
+    def draw_mesh(model)
+      # x,y,z, scale, back_face_culling
+      model.objects.each_with_index do |o, i|
+        glEnable(GL_CULL_FACE) if model.game_object.backface_culling
+        glEnable(GL_COLOR_MATERIAL)
+        glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE)
+        glShadeModel(GL_FLAT) unless o.faces.first[4]
+        glShadeModel(GL_SMOOTH) if o.faces.first[4]
+        glEnableClientState(GL_VERTEX_ARRAY)
+        glEnableClientState(GL_COLOR_ARRAY)
+        glEnableClientState(GL_NORMAL_ARRAY)
+        if model.model_has_texture
+          glEnable(GL_TEXTURE_2D)
+          glBindTexture(GL_TEXTURE_2D, model.materials[model.textured_material].texture_id)
+          glEnableClientState(GL_TEXTURE_COORD_ARRAY)
+          glTexCoordPointer(3, GL_FLOAT, 0, o.flattened_textures)
+        end
+        glVertexPointer(4, GL_FLOAT, 0, o.flattened_vertices)
+        glColorPointer(3, GL_FLOAT, 0, o.flattened_materials)
+        glNormalPointer(GL_FLOAT, 0, o.flattened_normals)
+
+        glDrawArrays(GL_TRIANGLES, 0, o.flattened_vertices_size/4)
+
+        if $debug
+          glDisable(GL_LIGHTING)
+          glPolygonMode(GL_FRONT_AND_BACK, GL_LINE)
+          glPolygonOffset(2, 0.5)
+          glLineWidth(3)
+          glDrawArrays(GL_TRIANGLES, 0, o.flattened_vertices_size/4)
+          glLineWidth(1)
+          glPolygonOffset(0, 0)
+          glPolygonMode(GL_FRONT_AND_BACK, GL_FILL)
+          glEnable(GL_LIGHTING)
+        end
+
+        glDisableClientState(GL_VERTEX_ARRAY)
+        glDisableClientState(GL_COLOR_ARRAY)
+        glDisableClientState(GL_NORMAL_ARRAY)
+        if model.model_has_texture
+          glDisableClientState(GL_TEXTURE_COORD_ARRAY)
+          # glBindTexture(GL_TEXTURE_2D, 0)
+          glDisable(GL_TEXTURE_2D)
+        end
+        glDisable(GL_CULL_FACE) if model.game_object.backface_culling
+        glDisable(GL_COLOR_MATERIAL)
+      end
+      $window.number_of_faces+=model.faces.size
+    end
+
+    def create_bounding_box(object, box, color = nil)
+      color ||= object.debug_color
+      box = object.normalize_bounding_box(box)
+
+      @bounding_boxes[:normals]  ||= []
+      @bounding_boxes[:colors]   ||= []
+      @bounding_boxes[:vertices] ||= []
+
+      @bounding_boxes[:normals] << [
+        0,1,0,
+        0,1,0,
+        0,1,0,
+        0,1,0,
+        0,1,0,
+        0,1,0,
+
+        0,-1,0,
+        0,-1,0,
+        0,-1,0,
+        0,-1,0,
+        0,-1,0,
+        0,-1,0,
+
+        0,0,1,
+        0,0,1,
+        0,0,1,
+        0,0,1,
+        0,0,1,
+        0,0,1,
+
+        1,0,0,
+        1,0,0,
+        1,0,0,
+        1,0,0,
+        1,0,0,
+        1,0,0,
+
+        -1,0,0,
+        -1,0,0,
+        -1,0,0,
+        -1,0,0,
+        -1,0,0,
+        -1,0,0,
+
+        -1,0,0,
+        -1,0,0,
+        -1,0,0,
+
+        -1,0,0,
+        -1,0,0,
+        -1,0,0
+      ]
+      @bounding_boxes[:colors] << [
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue,
+        color.red, color.green, color.blue
+      ]
+      @bounding_boxes[:vertices] << [
+        box.min_x, box.max_y, box.max_z,
+        box.min_x, box.max_y, box.min_z,
+        box.max_x, box.max_y, box.min_z,
+
+        box.min_x, box.max_y, box.max_z,
+        box.max_x, box.max_y, box.max_z,
+        box.max_x, box.max_y, box.min_z,
+
+        box.max_x, box.min_y, box.min_z,
+        box.max_x, box.min_y, box.max_z,
+        box.min_x, box.min_y, box.max_z,
+
+        box.max_x, box.min_y, box.min_z,
+        box.min_x, box.min_y, box.min_z,
+        box.min_x, box.min_y, box.max_z,
+
+        box.min_x, box.max_y, box.max_z,
+        box.min_x, box.max_y, box.min_z,
+        box.min_x, box.min_y, box.min_z,
+
+        box.min_x, box.min_y, box.max_z,
+        box.min_x, box.min_y, box.min_z,
+        box.min_x, box.max_y, box.max_z,
+
+        box.max_x, box.max_y, box.max_z,
+        box.max_x, box.max_y, box.min_z,
+        box.max_x, box.min_y, box.min_z,
+
+        box.max_x, box.min_y, box.max_z,
+        box.max_x, box.min_y, box.min_z,
+        box.max_x, box.max_y, box.max_z,
+
+        box.min_x, box.max_y, box.max_z,
+        box.max_x, box.max_y, box.max_z,
+        box.max_x, box.min_y, box.max_z,
+
+        box.min_x, box.max_y, box.max_z,
+        box.max_x, box.min_y, box.max_z,
+        box.min_x, box.min_y, box.max_z,
+
+        box.max_x, box.min_y, box.min_z,
+        box.min_x, box.min_y, box.min_z,
+        box.min_x, box.max_y, box.min_z,
+
+        box.max_x, box.min_y, box.min_z,
+        box.min_x, box.max_y, box.min_z,
+        box.max_x, box.max_y, box.min_z
+      ]
+    end
+
+    def draw_bounding_boxes
+      glEnableClientState(GL_VERTEX_ARRAY)
+      glEnableClientState(GL_COLOR_ARRAY)
+      glEnableClientState(GL_NORMAL_ARRAY)
+
+      _normals = @bounding_boxes[:normals].flatten.pack("f*")
+      _colors = @bounding_boxes[:colors].flatten.pack("f*")
+      _vertices_size = @bounding_boxes[:vertices].size
+      _vertices = @bounding_boxes[:vertices].flatten.pack("f*")
+
+      glVertexPointer(3, GL_FLOAT, 0, _vertices)
+      glColorPointer(3, GL_FLOAT, 0, _colors)
+      glNormalPointer(GL_FLOAT, 0, _normals)
+
+      glPolygonMode(GL_FRONT_AND_BACK, GL_LINE)
+      glDisable(GL_LIGHTING)
+      glDrawArrays(GL_TRIANGLES, 0, _vertices_size/3)
+      glEnable(GL_LIGHTING)
+      glPolygonMode(GL_FRONT_AND_BACK, GL_FILL)
+
+      glDisableClientState(GL_VERTEX_ARRAY)
+      glDisableClientState(GL_COLOR_ARRAY)
+      glDisableClientState(GL_NORMAL_ARRAY)
+    end
+
+    def handleGlError
+      e = glGetError()
+      if e != GL_NO_ERROR
+        $stderr.puts "OpenGL error in: #{gluErrorString(e)} (#{e})\n"
+        exit
+      end
+    end
+
+    def finalize # cleanup
+    end
+  end
+end

lib/states/game_states/game.rb

@@ -4,6 +4,7 @@ class IMICFPS
     include GLU
 
     def setup
+      @renderer = Renderer.new
       @terrain = Terrain.new#(size: 170, height: 0)
       @draw_skydome = true
       @skydome = Skydome.new(scale: 0.08, backface_culling: false, auto_manage: false)
@@ -48,12 +49,10 @@ class IMICFPS
         LightManager.lights.each(&:draw)
 
         @camera.draw
-        @skydome.draw if @skydome.renderable
+        @renderer.draw_object(@skydome) if @skydome.renderable
         glEnable(GL_DEPTH_TEST)
 
-        ObjectManager.objects.each do |object|
-          object.draw if object.visible && object.renderable
-        end
+        @renderer.draw
       end
 
       # Draw crosshair

lib/states/menu.rb

@@ -80,7 +80,7 @@ class IMICFPS
     end
 
     def button_up(id)
-      close if id == Gosu::KbEscape
+      $window.close if id == Gosu::KbEscape
       if Gosu::MsLeft
         @elements.each do |e|
           next unless e.is_a?(Link)

lib/wavefront/model.rb

@@ -12,7 +12,7 @@ class IMICFPS
 
       attr_accessor :objects, :materials, :vertices, :texures, :normals, :faces
       attr_accessor :x, :y, :z, :scale, :game_object
-      attr_reader :bounding_box
+      attr_reader :bounding_box, :model_has_texture, :textured_material
 
       def initialize(file_path:, game_object: nil)
         @game_object = game_object
@@ -51,55 +51,6 @@ class IMICFPS
         end
       end
 
-      def draw(x,y,z, scale, back_face_culling)
-        @x,@y,@z,@scale,@back_face_culling = x,y,z, scale, back_face_culling
-        @objects.each_with_index do |o, i|
-          glEnable(GL_CULL_FACE) if back_face_culling
-          glEnable(GL_COLOR_MATERIAL)
-          glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE)
-          glShadeModel(GL_FLAT) unless o.faces.first[4]
-          glShadeModel(GL_SMOOTH) if o.faces.first[4]
-          glEnableClientState(GL_VERTEX_ARRAY)
-          glEnableClientState(GL_COLOR_ARRAY)
-          glEnableClientState(GL_NORMAL_ARRAY)
-          if @model_has_texture
-            glEnable(GL_TEXTURE_2D)
-            glBindTexture(GL_TEXTURE_2D, @materials[@textured_material].texture_id)
-            glEnableClientState(GL_TEXTURE_COORD_ARRAY)
-            glTexCoordPointer(3, GL_FLOAT, 0, o.flattened_textures)
-          end
-          glVertexPointer(4, GL_FLOAT, 0, o.flattened_vertices)
-          glColorPointer(3, GL_FLOAT, 0, o.flattened_materials)
-          glNormalPointer(GL_FLOAT, 0, o.flattened_normals)
-
-          glDrawArrays(GL_TRIANGLES, 0, o.flattened_vertices_size/4)
-
-          if $debug
-            glDisable(GL_LIGHTING)
-            glPolygonMode(GL_FRONT_AND_BACK, GL_LINE)
-            glPolygonOffset(2, 0.5)
-            glLineWidth(3)
-            glDrawArrays(GL_TRIANGLES, 0, o.flattened_vertices_size/4)
-            glLineWidth(1)
-            glPolygonOffset(0, 0)
-            glPolygonMode(GL_FRONT_AND_BACK, GL_FILL)
-            glEnable(GL_LIGHTING)
-          end
-
-          glDisableClientState(GL_VERTEX_ARRAY)
-          glDisableClientState(GL_COLOR_ARRAY)
-          glDisableClientState(GL_NORMAL_ARRAY)
-          if @model_has_texture
-            glDisableClientState(GL_TEXTURE_COORD_ARRAY)
-            # glBindTexture(GL_TEXTURE_2D, 0)
-            glDisable(GL_TEXTURE_2D)
-          end
-          glDisable(GL_CULL_FACE) if back_face_culling
-          glDisable(GL_COLOR_MATERIAL)
-        end
-        $window.number_of_faces+=self.faces.size
-      end
-
       def update
         @x, @y, @z = @game_object.x, @game_object.y, @game_object.z
         @scale = @game_object.scale