jamieh-Project-11-Composition

sketch

/*
Jamie Ho
jamieh@andrew.cmu.edu
10:30
Project 11
*/


var hexagons;       //creating variablefor turtle
var len = 50;       //length of each triangle side
var factor = 0.15;  //factor to increase len size by
var angle = 0;      //initial angle
var colour = 255;   //white
var cFactor = 0.45; //amount to decrease the whiteness by

function setup() {
    createCanvas(400, 400);
    hexagons = new makeTurtle(width*0.8, height*0.4); //position of hexagons
    noLoop();
}

function draw() {
    background(0);

    hexagons.penDown();
    for(var i = 0; i < 500; i++){
        drawHexagon(len);           //call function with parameter of length for size of hexagons
        hexagons.face(angle);       //rotate hexagons
        
        //updates
        colour -= cFactor;          //turning white into black
        len += factor*i;            //increasing length of each side of hexagon
        angle += 3;                 //increasing rotation
    }
    hexagons.penUp();

}


function drawHexagon(length){
    hexagons.penDown();
    hexagons.setWeight(1);
    //triangle
    for(var i = 0; i < 6; i++){     // i < 6 to create hexagon
        hexagons.setColor(colour);  //setting colour for hexagon which changes for each time it runs through for loop
        hexagons.forward(length);   //move forward by 'length' dimension
        hexagons.right(60);         //move pen right by 60 degrees
    }
    hexagons.penUp();
}


//________________________TURTLE

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;
}

With the turtle graphics, I wanted to use hexagons, which is a very simple shape, and turn it into an abstracted drawing that makes the shape of the hexagon almost unrecognisable. I also wanted to make the code efficient with use of loops unlike the previous assignment 10A which required a lot of repeated lines of motion.

Below are images of the final product and other results I got from experimenting with composition.