- Turn on Sound

​

 - Run the sketch

 - Enter US state initials

 - The number of chords represents

     Native American tribes located in the state

 - You can change states

*/

​

​

let tribes = [];

let button;

let a = 0;

let c1 = 0;

let c2 = 0;

let c3 = 0;

let c4 = 0;

let speed1 = 1;

let speed2 = 2;

let speed3 = 1;

let speed4 = 2;

let op = false;

let col = 0;

let colSpeed = 1;

let song;

var amp;

var vol;

var fft;

var peakDetect;

let count = 0;

​

​

​

function setup() {

  createCanvas(1080,608);

  loadJSON('Tribes.json', stateCount);

  stateInput = createInput('');

  button = createButton('Enter');

  button.mousePressed(use);

  angleMode(DEGREES);

​

​

  song = loadSound('Shaman.m4a');

  amp = new p5.Amplitude();

  fft = new p5.FFT();

  peakDetect = new p5.PeakDetect(20, 20000, 0.08);

}

​

function stateCount(data) {

  tribes = data;

}

​

​

function draw() {

  background(0, 10);

  translate(width/2, height/2);

  vol = amp.getLevel();

  //print(vol);

  fft.analyze();

  peakDetect.update(fft);

​

​

  if (op) {

​

    noFill();

    if (tribes.length > 0) {

      a = 0;

      for (let i = 0; i < tribes.length; i++) {

        if (tribes[i].FIELD1 == stateInput.value()) {

          a++;

        }

      }

    }

​

​

    for (let ang = 0; ang < 360; ang += (360 / a) / 2) {

      rotate(ang);

      stroke(0, 10);

      fill(col, 10);

      bezier(a, 0, c1, c2, c3, c4, 0,0);

    }

​

    c1 = c1 + speed1;

    c2 = c2 + speed2;

    c3 = c3 + speed3;

    c4 = c4 + speed4;

​

    if (peakDetect.isDetected) {

      count++;

    }

​

    if (count % 2 == 0 || c1 < 0 || c1 > width) {

      speed1 = -speed1;

      //speed1 = random([1.1, 0.8]) * speed1;

    }

    if (count % 3 == 0 || c2 < 0 || c2 > height) {

      speed2 = -speed2;

      //speed2 = 0.95 * speed2

    }

    if (count % 5 == 0 || c3 < 0 || c3 > width) {

      speed3 = -speed3;

      //speed3 = random([1.1, 0.95]) * speed3;

​

    }

    if (count % 7 == 0 || c4 < 0 || c4 > height) {

      speed4 = -speed4;

      //speed4 = 1.05 * speed4

    }

​

​

    //col = col + colSpeed;

    if (peakDetect.isDetected) {

      //colSpeed = -colSpeed;

      col = [150, 20, 10, 70];

    } else {

      col = 255;

​

    }

  }

}

​

function use() {

  op = !op

  song.play();

}