Method: GameListener#move

Defined in:
lib/bangkok/gamelistener.rb

#move(piece, from, to) ⇒ Object

Move piece from one space to another. Generate two notes and sets CC_PORTAMENTO_TIME so there is a glide from the first note to the second. Also output multiple volume and pan values, moving smoothly from the original to the new value.



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# File 'lib/bangkok/gamelistener.rb', line 114

def move(piece, from, to)
  raise "from #{from} may not be off the board" unless from.on_board?

  # Do nothing if the piece moves off the board, because either capture()
  # or pawn_to_queen() will be called.
  return unless to.on_board?

  track = track_of(piece)
  channel = channel_of(piece)

  dist = from.distance_to(to)
  total_delta = @seq.length_to_delta(dist) # quarter note per space

  generate_notes(track, channel, total_delta, piece, from, to)
  generate_portamento(track, channel, total_delta)

  steps = interpolate(16, 64, 0, @max_delta, total_delta).to_i
  delta = (total_delta / steps).to_i
  start = @time_from_start

  steps.times { | step |
    val = rank_to_volume(interpolate(from.rank, to.rank, 0, steps-1, step))
    generate_volume(track, channel, start, val)
    
    val = file_to_pan(interpolate(from.file, to.file, 0, steps-1, step))
    generate_pan(track, channel, start, val)

    start += delta
  }

  @time_from_start += total_delta
end