Class: Fusuma::Plugin::Detectors::RotateDetector

Inherits:
Detector
  • Object
show all
Defined in:
lib/fusuma/plugin/detectors/rotate_detector.rb

Defined Under Namespace

Classes: Direction, Quantity

Constant Summary collapse

BUFFER_TYPE = 
'gesture'
GESTURE_RECORD_TYPE = 
'pinch'
FINGERS = 
[2, 3, 4].freeze
BASE_THERESHOLD = 
0.5
BASE_INTERVAL = 
0.1

Instance Method Summary collapse

Methods inherited from Detector

#create_event, #last_time, #tag, #type

Methods inherited from Base

#config_index, #config_param_types, #config_params, inherited, plugins

Instance Method Details

#create_index(gesture:, finger:, direction:) ⇒ Config::Index

Parameters:

Returns:



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# File 'lib/fusuma/plugin/detectors/rotate_detector.rb', line 44

def create_index(gesture:, finger:, direction:)
  Config::Index.new(
    [
      Config::Index::Key.new(gesture),
      Config::Index::Key.new(finger.to_i, skippable: true),
      Config::Index::Key.new(direction)
    ]
  )
end

#detect(buffers) ⇒ Event, NilClass

Parameters:

  • buffers (Array<Buffer>)

Returns:

  • (Event) —

    if event is detected

  • (NilClass) —

    if event is NOT detected



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# File 'lib/fusuma/plugin/detectors/rotate_detector.rb', line 19

def detect(buffers)
  buffer = buffers.find { |b| b.type == BUFFER_TYPE }
                  .select_by_events { |e| e.record.gesture == GESTURE_RECORD_TYPE }

  return if buffer.empty?

  angle = buffer.avg_attrs(:rotate)

  finger = buffer.finger
  direction = Direction.new(angle: angle).to_s
  quantity = Quantity.new(angle: angle).to_f

  index = create_index(gesture: type,
                       finger: finger,
                       direction: direction)

  return unless enough?(index: index, quantity: quantity)

  create_event(record: Events::Records::IndexRecord.new(index: index))
end