Author: atraylor

sketch

//atraylor@andrew.cmu.edu
//Section B
//Project 11
var frames = [];
var current = 0;
var numFrames = 7;
var x = 0;
var y = 0;
var t1;
var t2;
var t3;
var t4;
var t5;
var t6;
var t8;
function preload(){
    var filenames = [];
    filenames[0] = "https://i.imgur.com/1wsGt0D.png";
    filenames[1] = "https://i.imgur.com/NGkxNhE.png";
    filenames[2] = "https://i.imgur.com/E5rk1gn.png";
    filenames[3] = "https://i.imgur.com/dQtQDok.png";
    filenames[4] = "https://i.imgur.com/UIXXokF.png";
    filenames[5] = "https://i.imgur.com/pbZI4oD.png";
    filenames[6] = "https://i.imgur.com/eDwmWBE.png";
    filenames[7] = "https://i.imgur.com/bXLQ8DK.png";

    for(var i = 0; i < filenames.length; i++){
        frames.push(loadImage(filenames[i]));
    }
}
function setup() {
    createCanvas(274, 274);
    frameRate(10);
    background(255,100,100);
         t1 = makeTurtle(width/2, height/2);
         t2 = makeTurtle(width/3, height/2);
         t3 = makeTurtle(50, 50);
         t4 = makeTurtle(100, 60);
         t5 = makeTurtle(50, 50);
         t6 = makeTurtle(150, 50);
         t7 = makeTurtle(50, 50);
         t8 = makeTurtle(50, 50);
     frames[current].loadPixels();
     current = (current + 1) % numFrames;
     image(frames[current], 0, 0); //background image
}

function draw() {
    frames[current].loadPixels();
    current = (current + 1) % numFrames;
  // image(frames[current], 0, 0);
    //getting color from frames
    var framepixcolor = frames[current].get(t1.x, t1.y);
    var valueAtPix = brightness(framepixcolor);
    //turtles drawing lines color of the moving gif
    t1.setColor(color(valueAtPix));
    t1.setWeight(2);
    t1.forward(5);
    var a = mouseX;
    var b = mouseY;
    t1.turnToward(a, b, 10);
    framepixcolor = frames[current].get(t2.x, t2.y);
    valueAtPix = brightness(framepixcolor);
    t2.setColor(color(valueAtPix));
    t2.setWeight(1);
    t2.forward(1);
    t2.turnToward(a, b, 3);
    framepixcolor = frames[current].get(t3.x, t3.y);
    valueAtPix = brightness(framepixcolor);
    t3.setColor(color(valueAtPix));
    t3.setWeight(5);
    t3.forward(4);
    t3.turnToward(a, b, random(8,10));
    framepixcolor = frames[current].get(t4.x, t4.y);
    valueAtPix = brightness(framepixcolor);
    t4.setColor(color(valueAtPix));
    t4.setWeight(6);
    t4.forward(2);
    t4.turnToward(a, b, random(1, 10));
    framepixcolor = frames[current].get(t5.x, t5.y);
    valueAtPix = brightness(framepixcolor);
    t5.setColor(color(valueAtPix));
    t5.setWeight(1.5);
    t5.forward(5);
    t5.turnToward(a, b, random(7, 10));
    framepixcolor = frames[current].get(t6.x, t6.y);
    valueAtPix = brightness(framepixcolor);
    t6.setColor(color(valueAtPix));
    t6.setWeight(1);
    t6.forward(4);
    t6.turnToward(a, b, random(4, 10));
    framepixcolor = frames[current].get(t7.x, t7.y);
    valueAtPix = brightness(framepixcolor);
    t7.setColor(color(valueAtPix));
    t7.setWeight(3);
    t7.forward(1);
    t7.turnToward(a, b, random(2, 10));
    framepixcolor = frames[current].get(t8.x, t8.y);
    valueAtPix = brightness(framepixcolor);
    t8.setColor(color(valueAtPix));
    t8.setWeight(.5);
    t8.forward(2);
    t8.turnToward(a, b, random(2, 10));

}

/////////

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 wanted to use the turtles to reveal a gif, but I realized that that wasn’t the best method. I ended up having them draw values based on the brightness of the gif frames on a still from the gif. The result is a coffee cup infested with worms.