afukuda-Project11-Composition

sketch

/* 
 * Name | Ai Fukuda 
 * Course Section | C 
 * Email | afukuda@andrew.cmu.edu
 * Project | 11
 */ 

var myTurtle; 

function setup() {
  createCanvas(400, 400);
  background(193, 228, 221);

  myTurtle = makeTurtle(width/2, height/2);  // set turtle at center of canvas 
  myTurtle.setColor(color(140, 164, 212));   // set stroke color 
  myTurtle.setWeight(1); 
  myTurtle.penDown();                        // initialize turtle 

  frameRate(2);
}


function draw() {
  var sideLength = 20;             // set initial side length of rectangle 

  for (i=0; i<50; i++) {
    myTurtle.forward(sideLength);
    myTurtle.right(90);
    myTurtle.forward(sideLength);
    myTurtle.right(90);
    myTurtle.forward(sideLength);
    myTurtle.right(90);
    myTurtle.forward(sideLength);
    myTurtle.right(90);

    myTurtle.penUp();              // put pen up while rotation of rectangles are occuring 
    myTurtle.right(15);            // rotate rectangle by 30 degrees 
    myTurtle.penDown();            // put pen down 

    sideLength *= 1.05;            // increase side length by 1.05  
  }
}


// Turtle graphics implementation for p5.js:
function turtleLeft(d) {
    this.angle -= d;
}

function turtleRight(d) {
    this.angle += d;
}

function turtleForward(p) {
    var rad = radians(this.angle);
    var newx = this.x + cos(rad) * p;
    var newy = this.y + sin(rad) * p;
    this.goto(newx, newy);
}

function turtleBack(p) {
    this.forward(-p);
}

function turtlePenDown() {
    this.penIsDown = true;
}

function turtlePenUp() {
    this.penIsDown = false;
}

function turtleGoTo(x, y) {
    if (this.penIsDown) {
      stroke(this.color);
      strokeWeight(this.weight);
      line(this.x, this.y, x, y);
    }
    this.x = x;
    this.y = y;
}

function turtleDistTo(x, y) {
    return sqrt(sq(this.x - x) + sq(this.y - y));
}

function turtleAngleTo(x, y) {
    var absAngle = degrees(atan2(y - this.y, x - this.x));
    var angle = ((absAngle - this.angle) + 360) % 360.0;
    return angle;
}

function turtleTurnToward(x, y, d) {
    var angle = this.angleTo(x, y);
    if (angle < 180) {
        this.angle += d;
    } else {
        this.angle -= d;
    }
}

function turtleSetColor(c) {
    this.color = c;
}

function turtleSetWeight(w) {
    this.weight = w;
}


function turtleFace(angle) {
    this.angle = angle;
}

function makeTurtle(tx, ty) {
  var turtle = {x: tx, y: ty,
  angle: 0.0, 
  penIsDown: true,
  color: color(128),
  weight: 1,
  left: turtleLeft, right: turtleRight,
  forward: turtleForward, back: turtleBack,
  penDown: turtlePenDown, penUp: turtlePenUp,
  goto: turtleGoTo, angleto: turtleAngleTo,
  turnToward: turtleTurnToward,
  distanceTo: turtleDistTo, angleTo: turtleAngleTo,
  setColor: turtleSetColor, setWeight: turtleSetWeight,
  face: turtleFace};
  return turtle;
}

For this project I used this week’s lab as an underlying base, as I wanted to develop it further and make it dynamic and more intricate, since I saw a potential for it to become a compelling piece of work. Using ‘Turtle Example 2’ as a guide, each loop creates an array of rotated squares, which is overall rotated to gradually fill the canvas. While working on this project, I was playing around with the value of angle of rotation, and I was intrigued with how a slight change in angle of rotation causes a significant change in the overall affect the aggregate conveys. In the current configuration the angle of rotation is set to 15, which conveys a spiraling, sea-shell like geometry. While an angle of rotation of 30 conveys a more radial aggregation (see below for visuals).

 

 

 

 

[screenshot of final project]

 

 

 

 

[screenshot of project with angle of rotation of 30]

 

 

 

 

[screenshot of lab assignment + initial sketch of project]