coreygo · March 7, 2016 23:40 · Mar 7, 2016
diff --git a/SpiralOnAudioInputBeatListen.pde b/SpiralOnAudioInputBeatListen.pde
@@ -0,0 +1,138 @@
+import ddf.minim.*;
+import ddf.minim.analysis.*;
+import ddf.minim.signals.*;
+
+Minim minim;
+AudioInput in;
+//AudioPlayer player;
+BeatDetect beat;
+BeatListener bl;
+
+ArrayList pos = new ArrayList(0);
+//float[] playerBuffer;
+float[] inputBuffer;
+
+float A, X, Y;
+float g = (sqrt(7) - 1) / 2.0;
+float L = 1;
+
+float theta;
+int counter;
+
+void setup() {
+  size(1920, 1080, P3D);
+  // bug: required for proper alpha opacity layering in P3D
+  hint(DISABLE_OPTIMIZED_STROKE);
+  smooth();
+  frameRate(60); // overly optimistic, we're aiming for 60
+  colorMode(HSB, 255, 255, 255);
+  minim = new Minim(this);
+  //player = minim.loadFile("InTheLightOfKashmir.mp3", 2048);
+  //playerBuffer = new float[player.bufferSize()];
+  in = minim.getLineIn(Minim.STEREO, 2048);
+  inputBuffer = new float[in.bufferSize()];
+
+  X = Y = 0;
+  beat = new BeatDetect();
+  bl = new BeatListener(beat, in);
+  beat.setSensitivity(50);
+  counter = 1337*3;
+}
+
+void keyPressed()
+{
+  if (in.isMonitoring())
+  {
+    in.disableMonitoring();
+  } else
+  {
+    in.enableMonitoring();
+  }
+}
+
+void draw() {
+  background(0);
+  spiral(width/2, height/2, 0, counter);
+  //lissajous();
+  println("FPS: " + frameRate); // debug to show current framerate
+}
+
+void lissajous() {
+  // Lissajous + Bowditch
+  strokeWeight(1.5);
+  beginShape();
+  for (int i = 0; i < in.bufferSize() - 1; i++)
+  {
+    //stroke((i*.15), 0, 255, 255/32);
+    stroke(0, 0, 255, 255/32);
+    line(width/2+in.left.get(i+1)*1280, height/2-in.right.get(i+1)*720, width/2, height/2);
+    //point(width/2+in.left.get(i+1)*720, height/2-in.right.get(i+1)*720);
+  }
+  endShape();
+}
+
+void spiral(float x, float y, float start, int many) {
+  // Fibonacci
+  beat.detect(in.mix);
+  X = x;
+  Y = y;
+  L = start;
+  //if ( L >= 10) { L += start; }
+
+  theta = map(counter, 0, width/2, 0, PI/4);
+  counter += ((in.mix.level()*60)/2);
+  if (beat.isOnset()) { 
+    counter += 1337/2;
+  }
+  // prevents madness though there's room to improve counter reduction
+  // this is currently necessary but isn't smoothly implemented
+  // try commenting out this if statement to see the results
+  if (counter > 1337*3) { 
+    counter -= 1337/1.85;
+  }
+
+  println("Counter: " + counter); // debug to show number of current lines in fib sequence
+
+  pushMatrix();
+  for (int i = 0; i < many; i++) {
+
+    translate(X, Y);
+    rotate(theta);
+
+    strokeWeight(1);
+    stroke(255, 127/1.5);
+    line(0, L, 0, 0);
+
+    rotate(radians(noise((frameCount - i) * 0.001 * g) * 30.0 + 600));
+    stroke((i * 0.22), 255, 255, 127);
+    line(L, 0, 0, 0);
+
+    translate(-X, -Y);
+    L += g;
+    X += L;
+  }
+  popMatrix();
+}
+
+class BeatListener implements AudioListener
+{
+  private BeatDetect beat;
+  private AudioInput in;
+
+  BeatListener(BeatDetect beat, AudioInput source)
+  {
+    this.in = source;
+    this.in.addListener(this);
+    this.beat = beat;
+  }
+
+  void samples(float[] samps)
+  {
+    beat.detect(in.mix);
+  }
+
+  void samples(float[] sampsL, float[] sampsR)
+  {
+    beat.detect(in.mix);
+  }
+}