Class: Asteroids::MissilePhysics

Inherits:
Component show all
Defined in:
lib/asteroids/missile/missile_physics.rb

Instance Method Summary collapse

Methods inherited from Component

#draw

Constructor Details

#initialize(game_object, object_pool) ⇒ MissilePhysics

Returns a new instance of MissilePhysics.



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# File 'lib/asteroids/missile/missile_physics.rb', line 4

def initialize(game_object, object_pool)
   super(game_object)
   @object_pool = object_pool
end

Instance Method Details

#calculate_points(asteroid) ⇒ Object 



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# File 'lib/asteroids/missile/missile_physics.rb', line 30

def calculate_points(asteroid)
  case asteroid.radius
  when 45
    20
  when 30
    50
  when 17.5
    100
  end
end

#detect_collision? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/asteroids/missile/missile_physics.rb', line 19

def detect_collision?
  @object_pool.objects.each do |other_object|
    if other_object.is_a? Asteroids::Asteroid and
      Utils.collide(object, other_object)
        object.ship.add_score(calculate_points(other_object))
        return true
    end
  end
  return false
end

#update ⇒ Object 



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# File 'lib/asteroids/missile/missile_physics.rb', line 9

def update
  object.mark_for_removal if detect_collision?
  object.x += Gosu::offset_x(object.angle, 10) + object.vel_x
  object.y += Gosu::offset_y(object.angle, 10) + object.vel_y
  object.x %= 800
  object.y %= 600
  object.lifespan -= 0.1
  object.mark_for_removal if object.lifespan <= 0
end