Kevin Riordan Project 11- Composition

kzr turtle project

/*Kevin Riordan
Section C
kzr@andrew.cmu.edu
project_11*/
//details 1 changes how detailed it is horizontally, width gives pixel perfect color
//details 2 changes how detailed it is vertically, 1 gives pixel perect change
var details1 = 65;
var details2 = 5;
function preload() {//i have 2 background images, farnham jahanian or subra suresh
    var myImageLink = "https://i.imgur.com/PhOrH0d.jpg";
    //var myImageLink = "https://i.imgur.com/WNxbkQj.jpg";
    myImage = loadImage(myImageLink);
}

function setup() {
    createCanvas(480,480);
    background(0);
    myImage.loadPixels();//loading pixels in to use get later
}

function draw() {
    var t = makeTurtle(0,0);//make my turtle 🙂
    t.doTheStuff(width / details1,details2);//watch it do the stuff 🙂
}
//colorChangeDist is how often it changes color, is equal to details1
function doTheStuff(colorChangeDist,rowSize){
    var pixelColor;
    this.setWeight(details2);
    var increment = colorChangeDist;
    var numRows = height / rowSize;
    for(var k = 0; k < numRows; k++){//for loop to iterate vertically
        for(var i = 0; i < width; i += increment){//for loop for the odd rows
            pixelColor = myImage.get(this.x,this.y);
            this.setColor(color(pixelColor));
            this.forward(increment);
        }
        this.right(90);
        this.forward(rowSize);
        this.right(90);//turns it back after moving it to the next row position
        for(var j = width; j > 0; j -= increment){//for loop for the even rows
            pixelColor = myImage.get(this.x,this.y);
            this.setColor(color(pixelColor));
            this.forward(increment);
        }
        this.left(90);
        this.forward(rowSize);
        this.left(90);//turns it back after moving it to the next row position
    }
}
//turtle stuff
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, doTheStuff: doTheStuff};//added a function about doing stuff
    return turtle;
}

I wanted to make the turtle draw out an underlying image for my project. By making two variables for how detailed I wanted the drawing to be, detail1 and detail2, I can control how clear or blurry the picture is. The images look really cool at a medium amount of detail level, and I like the way farnham and subra look when drawn by turtles. Overall, this project helped me better understand how functions work together and I had alot of fun with it.