Class: LunarLander::Player

Inherits:
Chingu::GameObject
  • Object
show all
Defined in:
lib/lunar_lander/game_objects/player.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#fuel ⇒ Object

Returns the value of attribute fuel.



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# File 'lib/lunar_lander/game_objects/player.rb', line 6

def fuel
  @fuel
end

Instance Method Details

#die ⇒ Object 



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# File 'lib/lunar_lander/game_objects/player.rb', line 93

def die
  @engine_sound.stop
  Gosu::Sound["explosion.wav"].play
end

#rotate_left ⇒ Object 



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# File 'lib/lunar_lander/game_objects/player.rb', line 20

def rotate_left
  @angle -= 0.5
  
  Chingu::Particle.create( 
    :x => @x + Gosu::offset_x(@angle + 60, 20 * @factor),
    :y => @y + Gosu::offset_y(@angle + 60, 20 * @factor),
    :animation => @particle_animation,
    :scale_rate => -0.03, 
    :fade_rate => -35, 
    :rotation_rate => +1,
    :mode => :default,
    :factor => @factor / 2
  )
  Chingu::Particle.each { |particle| 
    particle.x -= Gosu::offset_x(@angle-90, 2 * @factor)
    particle.y -= Gosu::offset_y(@angle-90, 2 * @factor)
  }
end

#rotate_right ⇒ Object 



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# File 'lib/lunar_lander/game_objects/player.rb', line 39

def rotate_right
  @angle += 0.5
  
  Chingu::Particle.create( 
    :x => @x + Gosu::offset_x(@angle - 60, 20 * @factor), 
    :y => @y + Gosu::offset_y(@angle - 60, 20 * @factor), 
    :animation => @particle_animation,
    :scale_rate => -0.03, 
    :fade_rate => -35, 
    :rotation_rate => +1,
    :mode => :default,
    :factor => @factor / 2
  )
  Chingu::Particle.each { |particle| 
    particle.x -= Gosu::offset_x(@angle+90, 2 * @factor)
    particle.y -= Gosu::offset_y(@angle+90, 2 * @factor)
  }
end

#setup ⇒ Object 



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# File 'lib/lunar_lander/game_objects/player.rb', line 8

def setup
  @x = $window.width / 2
  @y = $window.height / 2
  self.image = Gosu::Image["player.png"]
  @engine_sound = Gosu::Sound["fierce_wind.wav"].play(1, 1, true)
  @engine_sound.pause
  self.acceleration_y = 0.01
  self.velocity_y = 1
  @particle_animation = Chingu::Animation.new(:file => "particle.png", :size => [32, 32])
  @fuel = 100.0
end

#should_die? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lunar_lander/game_objects/player.rb', line 98

def should_die?
  velocity_x > 0.5 or velocity_y > 0.4 or angle.abs > 5
end

#stop ⇒ Object 



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# File 'lib/lunar_lander/game_objects/player.rb', line 88

def stop
  self.velocity_x = 0
  self.velocity_y = 0
end

#stop_engine ⇒ Object 



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# File 'lib/lunar_lander/game_objects/player.rb', line 84

def stop_engine
  @engine_sound.pause
end

#thrust ⇒ Object 



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# File 'lib/lunar_lander/game_objects/player.rb', line 58

def thrust
  if @fuel > 0
    self.velocity_x += Gosu::offset_x(@angle, 0.05)
    self.velocity_y += Gosu::offset_y(@angle, 0.05)

    Chingu::Particle.create( 
      :x => @x - Gosu::offset_x(@angle, 20 * @factor), 
      :y => @y - Gosu::offset_y(@angle, 20 * @factor), 
      :animation => @particle_animation,
      :scale_rate => -0.03, 
      :fade_rate => -35, 
      :rotation_rate => +1,
      :mode => :default,
      :factor => @factor
    )
    
    Chingu::Particle.each { |particle| 
      particle.x -= Gosu::offset_x(@angle, 10 * @factor + rand(4))
      particle.y -= Gosu::offset_y(@angle, 10 * @factor + rand(4))
    }
    @engine_sound.resume unless @engine_sound.playing?
  
    @fuel -= 0.5
  end
end

#update ⇒ Object 



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# File 'lib/lunar_lander/game_objects/player.rb', line 102

def update
  super
  @engine_sound.stop if @fuel == 0
end