Class: Rabbit::Gesture::Processor

Inherits:
Object
  • Object
show all
Defined in:
lib/rabbit/gesture/processor.rb

Constant Summary collapse

DEFAULT_THRESHOLD = 
48
DEFAULT_SKEW_THRESHOLD_ANGLE = 
90 / 4
MOTIONS = 
%w(L R U D UL UR LL LR)

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(threshold = nil, skew_threshold_angle = nil) ⇒ Processor

Returns a new instance of Processor.



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# File 'lib/rabbit/gesture/processor.rb', line 10

def initialize(threshold=nil, skew_threshold_angle=nil)
  @threshold = threshold || DEFAULT_THRESHOLD
  @skew_threshold_angle = skew_threshold_angle
  @skew_threshold_angle ||= DEFAULT_SKEW_THRESHOLD_ANGLE
  reset
end

Instance Attribute Details

#motions ⇒ Object (readonly)

Returns the value of attribute motions.



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# File 'lib/rabbit/gesture/processor.rb', line 8

def motions
  @motions
end

#skew_threshold_angle ⇒ Object

Returns the value of attribute skew_threshold_angle.



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# File 'lib/rabbit/gesture/processor.rb', line 7

def skew_threshold_angle
  @skew_threshold_angle
end

#threshold ⇒ Object

Returns the value of attribute threshold.



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# File 'lib/rabbit/gesture/processor.rb', line 7

def threshold
  @threshold
end

Instance Method Details

#available_motion?(motion) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rabbit/gesture/processor.rb', line 23

def available_motion?(motion)
  MOTIONS.include?(motion)
end

#position ⇒ Object 



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# File 'lib/rabbit/gesture/processor.rb', line 63

def position
  [@x, @y]
end

#reset ⇒ Object 



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# File 'lib/rabbit/gesture/processor.rb', line 53

def reset
  @started = false
  @x = @y = -1
  @motions = []
end

#start(x, y) ⇒ Object 



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# File 'lib/rabbit/gesture/processor.rb', line 27

def start(x, y)
  @prev_x = @x = x
  @prev_y = @y = y
  @started = true
  @motions = []
end

#started? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rabbit/gesture/processor.rb', line 17

def started?
  @started
end

#to_a ⇒ Object 



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# File 'lib/rabbit/gesture/processor.rb', line 59

def to_a
  @motions
end

#update_position(x, y) ⇒ Object 



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# File 'lib/rabbit/gesture/processor.rb', line 34

def update_position(x, y)
  mx = x - @prev_x
  my = y - @prev_y

  motion = judge_motion(mx, my)
  if motion
    @prev_x = @x = x
    @prev_y = @y = y
    if @motions.last == motion
      false
    else
      @motions << motion
      true
    end
  else
    false
  end
end