Jdbrown – Project 11 – I Like Turtles (Mosaic)

sketch

// Joshua Brown
// Jdbrown@andrew.cmu.edu
// Section C
// Project 11: Turtle Fun

// makeTurtle(x, y) -- make a turtle at x, y, facing right, pen down
// left(d) -- turn left by d degrees
// right(d) -- turn right by d degrees
// forward(p) -- move forward by p pixels
// back(p) -- move back by p pixels
// penDown() -- pen down
// penUp() -- pen up
// goto(x, y) -- go straight to this location
// setColor(color) -- set the drawing color
// setWeight(w) -- set line width to w
// face(d) -- turn to this absolute direction in degrees
// angleTo(x, y) -- what is the angle from my heading to location x, y?
// turnToward(x, y, d) -- turn by d degrees toward location x, y
// distanceTo(x, y) -- how far is it to location x, y?

function setup () {
    createCanvas (480, 480);
    background (0);

    var t1 = makeTurtle(270, 120);
    var t2 = makeTurtle(255, 160);
    var t3 = makeTurtle(330, 340);
    var t4 = makeTurtle(30, 280);

    for (var i = 0; i < 1000; i++) {
        
        makeMoz(t1);    // makes the mini-med sized pattern;
        makeMaz(t2);    // makes the smallest patter;
        makeMax(t3);    // makes the largest pattern;
        makeThing(t4);  // makes the larger-med sized pattern
    }
}

function makeThing (t4) {

    t4.forward(10);
    t4.left(45);
    t4.forward(25);
    t4.left(90);
    t4.forward(50);
    t4.left(135);
    t4.forward(75);
    t4.left(180);
    t4.forward(150);
    t4.right(45);
    t4.forward(50);
    t4.right(90);

}


function makeMax (t3, a1) {

    t3.forward(200);
    t3.left(90);
    t3.forward(180);
    t3.left(90);
    t3.forward(160);
    t3.left(45);
    t3.forward(140);
    t3.left(90);
    t3.forward(120);
    t3.left(90);
    t3.forward(100);
    t3.left(45);
    t3.forward(80);
    t3.left(90);
    t3.forward(60);
    t3.left(90);
    t3.forward(40);
    t3.left(45);
    t3.forward(20);
    t3.left(90);
}

function makeMoz (t1) {
   
    t1.forward(50);
    t1.right(90);
    t1.forward(50);
    t1.right(45);
    t1.forward(50);
    t1.right(90);
    t1.forward(50);
    t1.right(90);
    t1.forward(50);
    t1.right(90);
    t1.forward(50);
    t1.right(45);
    t1.forward(50);
    t1.right(90);
    t1.forward(50);
    t1.right(90);
    t1.forward(50);
    t1.right(90);
    t1.forward(50);
    t1.right(45);
    t1.forward(50);
    t1.right(90);
    t1.forward(50);
    t1.right(90);
    t1.forward(50);
    t1.right(90);
    t1.forward(50);
    t1.right(45);
    t1.forward(50);
    t1.right(90);
    t1.forward(50);
    t1.right(90);
    t1.forward(50);
    t1.forward(50);
    t1.right(90);
    t1.forward(50);
    t1.right(45);
    t1.forward(50);
    t1.right(90);
    t1.forward(50);
}

function makeMaz (t2) {

    t2.forward(25);
    t2.right(90);
    t2.forward(25);
    t2.right(45);
    t2.forward(25);
    t2.right(90);
    t2.forward(25);
    t2.right(90);
    t2.forward(25);
    t2.right(90);
    t2.forward(25);
    t2.right(45);
    t2.forward(25);
    t2.right(90);
    t2.forward(25);
    t2.right(90);
    t2.forward(25);
    t2.right(90);
    t2.forward(25);
    t2.right(45);
    t2.forward(50);
    t2.right(90);
    t2.forward(50);
    t2.right(90);
    t2.forward(50);
    t2.right(90);
    t2.forward(50);
    t2.right(45);
    t2.forward(50);
    t2.right(90);
    t2.forward(50);
    t2.right(90);
    t2.forward(50);
    t2.forward(50);
    t2.right(90);
    t2.forward(50);
    t2.right(45);
    t2.forward(50);
    t2.right(90);
    t2.forward(50);
}

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(255),
                  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;
}

There’s something simplistic and beautiful about these turtle designs. I’ve chosen to go a simpler route and just explore the shapes turtles can effortlessly create. I really enjoy these mosaic-shapes.