Class: LunarLander::Play

Inherits:
Chingu::GameState
  • Object
show all
Defined in:
lib/lunar_lander/game_states/play.rb

Instance Method Summary collapse

Instance Method Details

#adjust_parallax_viewport ⇒ Object 



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# File 'lib/lunar_lander/game_states/play.rb', line 33

def adjust_parallax_viewport	
  @parallax.camera_x += @player.velocity_x if @player.x > $window.width * 0.8 or @player.x < $window.width * 0.2
  @parallax.camera_y += @player.velocity_y if @player.y < $window.height * 0.2 or (@player.y > $window.height * 0.2 and @parallax.camera_y < -($window.height - @moon.height)) 
end

#camera_left ⇒ Object 



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# File 'lib/lunar_lander/game_states/play.rb', line 25

def camera_left
  @parallax.camera_x -= 2
end

#camera_right ⇒ Object 



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# File 'lib/lunar_lander/game_states/play.rb', line 29

def camera_right
  @parallax.camera_x += 2
end

#cinema_zoom ⇒ Object 



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# File 'lib/lunar_lander/game_states/play.rb', line 38

def cinema_zoom
  during(3000) do
    zoom_in
  end
end

#destroy_particles ⇒ Object 



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# File 'lib/lunar_lander/game_states/play.rb', line 67

def destroy_particles
  game_objects.destroy_if do |object| 
    if object.kind_of? Chingu::Particle
      object.outside_window? || object.color.alpha == 0
    end
  end
end

#draw ⇒ Object 



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# File 'lib/lunar_lander/game_states/play.rb', line 131

def draw
  super
  @background.draw(($window.width / 2) - (@background.width * 0.5)/2, ($window.height / 2) - (@background.height * 0.5) / 2, 0, 0.5, 0.5)

  offset_x = 0
  if @player.x > $window.width * 0.8
    offset_x = -(@player.x - $window.width * 0.8)
  elsif @player.x < $window.width * 0.2
    offset_x = -(@player.x - $window.width * 0.2)
  end
  
  offset_y = 0
  if @player.y > $window.height * 0.2 and @parallax.camera_y < -($window.height - @moon.height)
    offset_y = -(@player.y - $window.height * 0.2)
  elsif @player.y < $window.height * 0.2
    offset_y = -(@player.y - $window.height * 0.2)
  end
  
  $window.translate(offset_x, offset_y) do
    @player.draw
  end
end

#restrict_player_movement ⇒ Object 



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# File 'lib/lunar_lander/game_states/play.rb', line 107

def restrict_player_movement
  if @player.x > $window.width * 0.8
    @player.x = $window.width * 0.8
  elsif @player.x < $window.width * 0.2
    @player.x = $window.width * 0.2
  end
  if @player.y > $window.height * 0.2 and @parallax.camera_y < -($window.height - @moon.height)
    @player.y = $window.height * 0.2 
  elsif @player.y < $window.height * 0.2
    @player.y = $window.height * 0.2
  end
end

#setup ⇒ Object 



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# File 'lib/lunar_lander/game_states/play.rb', line 7

def setup
  self.input = { :p => LunarLander::Pause, :holding_z => :zoom_in, :holding_x => :zoom_out, :c => :cinema_zoom, :holding_d => :camera_right, :holding_a => :camera_left }
  
  @player = Player.new
  @player.input = {:holding_left => :rotate_left, :holding_right => :rotate_right, :holding_up => :thrust, :released_up => :stop_engine}
  
  @background = Gosu::Image["earth.png"]
  
  @moon = Gosu::Image["moon.png"]
  @parallax = Chingu::Parallax.create(:x => 0, :y => $window.height - @moon.height, :rotation_center => :top_left, :zorder => 1)
  @parallax << { :image => @moon, :repeat_x => true, :repeat_y => false}
  
  @surface = Chingu::Rect.new(0, $window.height-@moon.height + 60, $window.width, @moon.height - 60)
  
  setup_hud
  @factor = 1
end

#setup_hud ⇒ Object 



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# File 'lib/lunar_lander/game_states/play.rb', line 75

def setup_hud
  @velocity_x_text = Chingu::Text.create("Velocidade Lateral: 0", :x => 10, :y => 10, :zorder => 55, :size=>20)
  @velocity_y_text = Chingu::Text.create("Velocidade Vertical: 0", :x => 10, :y => 30, :zorder => 55, :size=>20)
  @angle_text = Chingu::Text.create("Ângulo: 0", :x => 10, :y => 50, :zorder => 55, :size=>20)
  @fuel_text = Chingu::Text.create("Combustível: #{@player.fuel}", :x => 10, :y => 70, :zorder => 55, :size=>20)
end

#test_colision ⇒ Object 



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# File 'lib/lunar_lander/game_states/play.rb', line 95

def test_colision
  if @player.bounding_box.collide_rect?(@surface)
    if @player.should_die?
      @player.die
      switch_game_state LunarLander::Gameover
    else
      switch_game_state LunarLander::Leveldone  
    end
    @player.stop
  end
end

#update ⇒ Object 



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# File 'lib/lunar_lander/game_states/play.rb', line 120

def update
  super
  @player.update_trait
  @player.update
  destroy_particles
  test_colision
  update_hud
  adjust_parallax_viewport
  restrict_player_movement
end

#update_hud ⇒ Object 



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# File 'lib/lunar_lander/game_states/play.rb', line 82

def update_hud
  if @player
     update_text_if_needed(@velocity_x_text, "Velocidade Lateral: #{(@player.velocity_x * 10).ceil.abs}")
     update_text_if_needed(@velocity_y_text, "Velocidade Vertical: #{(@player.velocity_y * 10).ceil * -1}")
     update_text_if_needed(@angle_text, "Ângulo: #{@player.angle}")
     update_text_if_needed(@fuel_text, "Combustível: #{@player.fuel.ceil}")
  end
end

#update_text_if_needed(text_instance, text) ⇒ Object 



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# File 'lib/lunar_lander/game_states/play.rb', line 91

def update_text_if_needed(text_instance, text)
  text_instance.text = text unless text_instance.text == text
end

#zoom_by_factor ⇒ Object 



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# File 'lib/lunar_lander/game_states/play.rb', line 54

def zoom_by_factor
  game_objects.each do |game_object|
    next if game_object.kind_of? Chingu::Text
    game_object.factor = @factor
    if game_object.kind_of? Chingu::Parallax
      game_object.layers.each do |p| p.factor = @factor end
      game_object.y = $window.height - (@moon.height * game_object.factor)
    end
  end
  @player.factor = @factor
  Chingu::Particle.all.each do |p| p.factor = @factor end
end

#zoom_in ⇒ Object 



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# File 'lib/lunar_lander/game_states/play.rb', line 44

def zoom_in
  @factor += 0.001
  zoom_by_factor
end

#zoom_out ⇒ Object 



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# File 'lib/lunar_lander/game_states/play.rb', line 49

def zoom_out
  @factor -= 0.001
  zoom_by_factor
end