createCanvas(1280, 720);

}

​

function draw() {

  background(220);

}

​

// When you press the 'F' key, this program will export a series of images into

// your default Downloads folder. These can then be made into an animated gif. 

// This code is known to work with p5.js version 0.6.0

// Prof. Golan Levin, 28 January 2018

​

// INSTRUCTIONS FOR EXPORTING FRAMES (from which to make a GIF): 

// 1. Run a local server, using instructions from here:

//    https://github.com/processing/p5.js/wiki/Local-server

// 2. Set the bEnableExport variable to true.

// 3. Set the myNickname variable to your name.

// 4. Run the program from Chrome, press 'f'. 

//    Look in your 'Downloads' folder for the generated frames.

// 5. Note: Retina screens may export frames at twice the resolution.

​

​

//===================================================

// User-modifiable global variables. 

var myNickname = "nickname";

var nFramesInLoop = 120;

var bEnableExport = false;

​

// Other global variables you don't need to touch.

var nElapsedFrames;

var bRecording;

var theCanvas;

​

//===================================================

function setup() {

  theCanvas = createCanvas(1280, 720);

  bRecording = false;

  nElapsedFrames = 0;

}

​

//===================================================

function keyTyped() {

  if (bEnableExport) {

    if ((key === 'f') || (key === 'F')) {

      bRecording = true;

      frameRate(2); // while we're exporting

      nElapsedFrames = 0;

    }

  }

}

​

//===================================================

function draw() {

​

  // Compute a percentage (0...1) representing where we are in the loop.

  var percentCompleteFraction = 0;

  if (bRecording) {

    percentCompleteFraction = float(nElapsedFrames) / float(nFramesInLoop);

  } else {

    percentCompleteFraction = float(frameCount % nFramesInLoop) / float(nFramesInLoop);

  }

​

  // Render the design, based on that percentage. 

  // This function renderMyDesign() is the one for you to change. 

  renderMyDesign(percentCompleteFraction);

​

  // If we're recording the output, save the frame to a file. 

  // Note that the output images may be 2x large if you have a Retina mac. 

  // You can compile these frames into an animated GIF using a tool like: 

  if (bRecording && bEnableExport) {

    var frameOutputFilename = myNickname + "_frame_" + nf(nElapsedFrames, 4) + ".png";

    print("Saving output image: " + frameOutputFilename);

    saveCanvas(theCanvas, frameOutputFilename, 'png');

    nElapsedFrames++;

​

    if (nElapsedFrames >= nFramesInLoop) {

      bRecording = false;

      frameRate(60);

    }

  }

}

​

//===================================================

function renderMyDesign(percent) {

  //

  // THIS IS WHERE YOUR ART GOES. 

  // This is an example of a function that renders a temporally looping design. 

  // It takes a "percent", between 0 and 1, indicating where we are in the loop. 

  // Use, modify, or delete whatever you prefer from this example. 

  // This example uses several different graphical techniques. 

  // Remember to SKETCH FIRST!

​

  //----------------------

  // here, I set the background and some other graphical properties

​

  background(210);  

  smooth();

  strokeWeight(2);

​

  //----------------------

  // Here, I assign some handy variables. 

  var cx = 100;

  var cy = 100;

​

  //----------------------

  //shapes with sigmoid pattern

  noStroke();

  push();  

  fill(random(200,255),255,255);

  rotate(45);

  translate(-400,-900);

  for (var x = 0; x < 30; x++){

  for (var sy = 0; sy <= 2000; sy += 100) {

    var t = map(sy, 0, height, 0.0, 0.25);

    var sx = width/4 - 20 * -tan((t + percent) * PI);

    rect(sx+100*x, sy-1, 5, 5); 

  }

  }

  pop();

  // shifting shapes 1

  noStroke(); 

  push();  

  fill(155,155,255,100);

  rotate(45);

  translate(-300,-1000);

  var angle = 100

  rotate(millis() /3000)

  for (var x = 0; x < 30; x++){

  for (var sy = 0; sy <= 10000; sy += 200) {

    var t = map(sy, 0, height, 0.0, 0.25);

    var sx = width/4 + 50 * sin((t + percent) * TWO_PI);

    rect(sx, sy, 10, 20);

    rect(sx+100*x, sy-1, 30, 10); 

    angle = angle + 30

    rotate(angle);

  }

  }

  pop();

  //shifting shapes 2

  push();  

  noStroke();   

  rotate(45);

  fill(255,0,205, 150)

  translate(-300,-400);

  var angle = 120

  rotate(millis() /1000)

  for (var x = 0; x < 10; x++){

  for (var sy = 0; sy <= 1000; sy += 400) {

    var t = map(sy, 0, height, 0.0, 0.25);

    var sx = width/4 + 10 * cos((t + percent) * TWO_PI);

    rect(sx, sy, 10, 20);

    rect(sx+100*x, sy-1, 30, 30); 

    angle = angle + 3

    rotate(angle);

  }

  }

  pop();

    //shifting shapes 3

  push();  

  noStroke();   

  rotate(45);

  fill(255,0,0, 170)

  translate(500,-400);

  var angle = 70

  for (var x = 0; x < 5; x++){

  for (var sy = 0; sy <= 2000; sy += 500) {

    var t = map(sy, 10, height, 0.0, 0.5);

    var sx = (width/4 + 100 * tan((t + percent) * TWO_PI))/10000;

    rect(sx-50*x, sy-1*10, 70, 70); 

    angle = angle + 10

    rotate(millis()/3000)

    rotate(angle);

  }

  }

  angle = angle + 10

  rectMode(CENTER);

  pop();

}

​

​

// Symmetric double-element sigmoid function ('_a' is the slope)

// See https://github.com/IDMNYU/p5.js-func/blob/master/lib/p5.func.js

// From: https://idmnyu.github.io/p5.js-func/

//===================================================

function doubleExponentialSigmoid(_x, _a) {

  if (!_a) _a = 0.75; // default

​

  var min_param_a = 0.0 + Number.EPSILON;

  var max_param_a = 1.0 - Number.EPSILON;

  _a = constrain(_a, min_param_a, max_param_a);

  _a = 1 - _a;

​

  var _y = 0;

  if (_x <= 0.5) {

    _y = (pow(2.0 * _x, 1.0 / _a)) / 2.0;

  } else {

    _y = 1.0 - (pow(2.0 * (1.0 - _x), 1.0 / _a)) / 2.0;

  }

  return (_y);

}