let xspacing;// = 50; // Distance between each horizontal location

let xspacing2;

let w; // Width of entire wave

let theta = 0.0; // Start angle at 0

​

let period;// = 500.0; // How many pixels before the wave repeats

let period2;

let dx; // Value for incrementing x

let dx2;

let yvalues; // Using an array to store height values for the wave

let yvalues2; 

​

let amplitude;// = 75.0; // Height of wave

let amplitude2;

let circleSize;

let r,g,b;

​

function setup() {

  createCanvas(600, 400);

  w = width + 16;

  amplitude=createSlider(0,100,75);

  amplitude.position(10,10);

  amplitude.style('width', '80px');

  // amplitude.style('opacity', '1');

  amplitude2=createSlider(0,100,75);

  amplitude2.position(10,30);

  amplitude2.style('width', '80px');

  xspacing=15;

  xspacing2=15;

//   xspacing=createSlider(0,400,15);

//   xspacing.position(180,10);

//   xspacing.style('width', '80px');

//   xspacing2=createSlider(0,400,15);

//   xspacing2.position(180,30);

//   xspacing2.style('width', '80px');

  // circleSize=createSlider(1,20,5);

  // circleSize.position(200,10);

  // circleSize.style('width', '80px');

  period=createSlider(0,1000,500);

  period.position(350,10);

  period.style('width', '160px');

  period2=createSlider(0,1000,500);

  period2.position(350,30);

  period2.style('width', '160px');

  r=createSlider(0,255,100);

  r.position(10,370);

  r.style('width', '160px');

  g=createSlider(0,255,100);

  g.position(180,370);

  g.style('width', '160px');

  b=createSlider(0,255,100);

  b.position(360,370);

  b.style('width', '160px');

  // dx = (TWO_PI / period.value()) * xspacing.value();

  yvalues = new Array(floor(w / xspacing));

  yvalues2 = new Array(floor(w / xspacing2));

​

}

​

function draw() {

  // dx = (TWO_PI / period.value()) * xspacing.value();

  dx = (TWO_PI/ period.value()) * xspacing;

  dx2 = (TWO_PI/ period2.value()) * xspacing2;

  background(0);

  text('amplitude', 100, 22);

  // text('wavelength', 270, 22);

  // text('particle size', 380, 22);

  text('wavelength', 520, 22);//replaced the perido

​

  calcWave();

  renderWave();

}

​

function calcWave() {

  // Increment theta (try different values for

  // 'angular velocity' here)

  theta += 0.02;

​

  // For every x value, calculate a y value with sine function

  let x = theta;

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

    yvalues[i] = sin(x) * amplitude.value();

    x += dx;

  }

  for (let i = 0; i < yvalues2.length; i++) {

    yvalues2[i] = cos(x) * amplitude2.value();

    x += dx2;

  }

​

}

​

​

​

function renderWave() {

  noStroke();

  fill(r.value(),g.value(),b.value());

  // A simple way to draw the wave with an ellipse at each location

  for (let x = 0; x < yvalues.length; x++) {

    ellipse(x * xspacing, height / 2 + yvalues[x], 10,10);

  }

  for (let x = 0; x < yvalues2.length; x++) {

    ellipse(x * xspacing2, height / 2 + yvalues2[x], 10,10);

  }

}