Class: Ruck::Generators::TriOsc

Inherits:
Object
  • Object
show all
Includes:
Oscillator, Source
Defined in:
lib/ruck/ugen/oscillators.rb

Constant Summary

Constants included from Oscillator

Oscillator::TWO_PI

Instance Attribute Summary

Attributes included from UGen

#name

Instance Method Summary collapse

Methods included from Oscillator

included, #phase_forward

Methods included from UGen

#to_s

Methods included from Source

#<<, #>>, #last, #out, #out_channels

Constructor Details

#initialize(attrs = {}) ⇒ TriOsc

Returns a new instance of TriOsc.



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# File 'lib/ruck/ugen/oscillators.rb', line 81

def initialize(attrs = {})
  parse_attrs({ :freq => 440.0,
                :gain => 1.0 }.merge(attrs))
  @phase = 0.0
  @last = 0.0
end

Instance Method Details

#attr_names ⇒ Object 



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# File 'lib/ruck/ugen/oscillators.rb', line 100

def attr_names
  [:freq, :gain, :phase]
end

#next(now) ⇒ Object 



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# File 'lib/ruck/ugen/oscillators.rb', line 88

def next(now)
  return @last if @now == now
  @now = now
  @last = if phase < 0.5
    phase * 4.0 - 1.0
  else
    1.0 - ((phase - 0.5) * 4.0)
  end * gain
  phase_forward
  @last
end