Category: Project-11-Composition

sketch

//Isabelle Vincent
//Section E
//ifv@andrew.cmu.edu
//Project-11

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;
}

function lines(t1){
  for(var j = 0; j<4;j++){
    t1.penDown();
    t1.forward(10);
    t1.left(180);
  }
}

function setup(){
  createCanvas(480,480);
}

function draw(){
  //inverse the stroke and bg colors
  var v = map(mouseY,0,height,0,255);
  var b = map(mouseY,height,0,0,255);
  background(v);
  var t1 = makeTurtle(mouseX,mouseY);
  t1.setColor(b);
  t1.setWeight(6);
  t1.penUp();
  //t1.forward(20);
  //t1.penDown();
  //t1.left(90);
  //t1.left(10);
  for(var i=0; i<1000; i++){
      t1.penUp();
      //go out from center
      var dist=(-(mouseY+mouseX)/2) +1 + i *1
      t1.forward(dist);
      //draw
      lines(t1);
      //come back
      t1.penUp();
      t1.left(180);
      t1.forward(dist);
      t1.left(180);

      //rotate by some angle
      t1.left(10);
  }
}

sketch

//Yoon Young Kim
//Section E
//yoonyouk@andrew.cmu.edu
//Assignment10-A


var turtle;



function setup() {
    var heartmeterangle = random(40, 70);
    var heartmeterlength = random(75, 150);
    createCanvas(480, 360);
    background(random(170, 255));
    frameRate(10);
    turtle = makeTurtle(0, height/2);
    turtle.penDown();
    turtle.setColor(0);
    turtle.setWeight(random(5, 20));


    for(i = 0; i < 8; i++) {

        //rainbow colors
        var r = random(50, 200);
        var g = random(50, 200);
        var b = random(50, 200);
      

        turtle.setColor(color(r, g, b));
        turtle.setWeight(50);


       // turtle.right(sqrt(sq(floor(mouseX - turtle.x))+sq(floor(mouseY-turtle.y))));
        //turtle.forward(floor(mouseX - turtle.x), floor(mouseY-turtle.y));

    turtle.penDown();
    turtle.left(heartmeterangle);
    turtle.forward(heartmeterlength);
    turtle.right(180-heartmeterangle);
    turtle.forward(2*heartmeterlength);
    turtle.left(180-heartmeterangle);
    turtle.forward(heartmeterlength);   
    turtle.right(120-heartmeterangle);

    }

}


function draw() {


}


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 turtle graphics project, I made a heart meter like graphic that changes whenever refreshed. A new turtle is drawn after each jump. When refreshed, the colors and positions and lengths change color as well. 

sketch

//sets up an empty arrays for turtles
var turtleArray = [];
var turtleArray2 = [];
var turtleArray3 = [];
var turtleMouse = [];
var turtleX;
var turtleY;
var x;
var y;

function setup() {
    createCanvas(480, 480);
    background(220);
}

function draw() {
    turtles();
    turtles2();
    turtles3();
}

//when mouse is pressed, new turtles are pushed into array
//(with same x and y values)
function mousePressed() {
    turtleX = 0;
    //allows for stair cases to be at every part of canvas
    turtleY = random(-height, height);
    turtleArray.push(makeTurtle(turtleX, turtleY));
    turtleArray2.push(makeTurtle(turtleX, turtleY));
    turtleArray3.push(makeTurtle(turtleX, turtleY));
}

function turtles() {
    //for every turtle in array, sets new color
    for (var i = 0; i < turtleArray.length; i++) {
        turtleArray[i].penDown();
        turtleArray[i].setColor(random(0, 255));
        turtleArray[i].setWeight(2);

        //will fill up canvas by creating staircase
        for (var j = 0; j <= 12; j++) {
            turtleArray[i].forward(width / 12);
            turtleArray[i].right(90);
            turtleArray[i].forward(width / 12);
            turtleArray[i].left(90);
        }

        turtleArray[i].penUp();
    }
}

function turtles2() {
    for (var i = 0; i < turtleArray.length; i++) {
        turtleArray2[i].penDown();
        turtleArray2[i].setColor(random(0, 255));
        turtleArray2[i].setWeight(2);

        for (var j = 0; j <= 24; j++) {
            turtleArray2[i].forward(width / 24);
            turtleArray2[i].right(90);
            turtleArray2[i].forward(width / 24);
            turtleArray2[i].left(90);
        }

        turtleArray[i].penUp();
    }
}

function turtles3() {
    for (var i = 0; i < turtleArray.length; i++) {
        turtleArray3[i].penDown();
        turtleArray3[i].setColor(random(0, 255));
        turtleArray3[i].setWeight(2);

        for (var j = 0; j <= 36; j++) {
            turtleArray3[i].forward(width / 36);
            turtleArray3[i].right(90);
            turtleArray3[i].forward(width / 36);
            turtleArray3[i].left(90);
        }

        turtleArray[i].penUp();
    }
}

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 assignment, I decided that I wanted to try and make an interesting pattern with my turtles. At first, I started with a basic staircase which generated at a random y value in between -480 and 480. Once I was able to figure out the code for that, I started to make new turtle arrays that ended up resembling a snowy mountain peak based on the color and the way that each of the lines intersected.

Every time a user clicks inside of the canvas, three turtles will generate with different color values.

sketch process

examples of turtle compositions