Class: Rubots::Graphics::Beam

Inherits:
Object
  • Object
show all
Defined in:
lib/rubots/graphics/beam.rb

Constant Summary collapse

BEAM_LENGTH =

As long as it goes out of the screen it’s good

10000
BEAM_DURATION =

For how many ticks is the beam visible

30

Instance Method Summary collapse

Constructor Details

#initialize(window, beam) ⇒ Beam

Returns a new instance of Beam.



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# File 'lib/rubots/graphics/beam.rb', line 7

def initialize(window, beam)
  @beam = beam
  @duration = BEAM_DURATION
  @window = window
  @pew = Gosu::Sample.new(window, Assets::PEW_SOUND)
  @pew.play
end

Instance Method Details

#decay ⇒ Object 



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# File 'lib/rubots/graphics/beam.rb', line 15

def decay
  @duration -= 1
end

#draw ⇒ Object 



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# File 'lib/rubots/graphics/beam.rb', line 23

def draw
  rad_angle = @beam.angle * Math::PI / 180
  x_end = @beam.source_x + Math.sin(rad_angle) * BEAM_LENGTH
  y_end = @beam.source_y + Math.cos(rad_angle) * BEAM_LENGTH * -1
  beam_color = 0xffff0000
  @window.draw_line @beam.source_x, @beam.source_y, beam_color, x_end, y_end, beam_color
end

#expired? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rubots/graphics/beam.rb', line 19

def expired?
  @duration <= 0
end