CircularThoughts

The prompt for Genuary 2024 Day 29 is SDF (Signed Distance Function)

Within the SonicPi Composition of "Circular Thoughts", the SDF controls the bpm, rate, beat_stretch and the notes being played

Poem

The Circles are Rotating
Their Inner Thoughts are Gyrating
The tone  is Glitchy
The thoughts are plenty
As the Circular Thoughts are explaining
What their inner Thoughts are Saying

Audio

IllestPreacha · CircularThoughts

SonicPi Code

#getting the sign distance function
#Formula = d(x,y)=  Math.sqrt(x**2 + y**2) - radius
#which can be written as Math.hypot(x,y)

#x,y coordinates and the r for radius
def SDF_circle(x, y, r)
  Math.hypot(x,y) - r
end


r = 75

live_loop :soundOfSDF do

  #random seed based on time
  use_random_seed Time.now.to_i

 use_bpm (dist_sdf).abs * 10 + 2

  #angle from -75 to beyond 360, to test the sdf

  angle = rrand_i(-75,400)

  # r * angleInRadians = (angleInDegrees * PI) / 180; gives a coordinate for X and Y

  #use cos for both as it allows for more points outside the circle to be played

  x = r * Math.cos(angle * Math::PI / 180)
  y = r * Math.cos(angle * Math::PI / 180)

  dist_sdf = SDF_circle(x,y,r)

  #if the sign distance value is negative, it plays the disance in prophet
  #if the sign distance value is positive, it plays the distance in piano

  if (dist_sdf < 1)
    with_fx [:ping_pong,:flanger].choose, mix: rrand(0.4,0.7) do
      use_synth :prophet
      play (dist_sdf).abs
      sample [:bass_dnb_f,:perc_snap,:perc_swoosh].tick, 
             rate: (r/dist_sdf) if spread(7,12).tick
    end

  else
    with_fx [:ixi_techno,:whammy].choose, mix: rrand(0.1,0.9) do
      use_synth :piano
      play (dist_sdf)
      sample [:drum_bass_hard,:tabla_ghe1].choose, 
            beat_stretch: (r/dist_sdf).abs if spread(5,12).tick
    end

  end
  sleep 0.5
end