Katherine Hua – Project 11 – Composition

sketch

/* Katherine Hua
Section A
khua@andrew.cmu.edu
Project-11-Composition */

//global variables
var ttl1;
var ttl2;
var ttl3;
var ttl4;
var ttl5;

function setup() {
    createCanvas(480, 480);
    background(35);
    //starting positions of turtle
    ttl1 = makeTurtle(267, 302);
    ttl2 = makeTurtle(260, 280);
    ttl3 = makeTurtle(280, 407);
    ttl4 = makeTurtle(267, 277);
    ttl5 = makeTurtle(278, 360);
    strokeCap(PROJECT);
    strokeJoin(MITER);
    frameRate(1);
}

function draw() {
	//turtle 5
	ttl5.setColor('skyblue');
	ttl5.setWeight(1);
	for (var n = 0; n < 10; n ++) {
		ttl5.forward(30);
		ttl5.left(55);
		ttl5.forward(50);
		ttl5.right(15);
		if (n % 9 === 0) {
			ttl5.forward(3);
		}
	}
	//turtle 1
	ttl1.setColor('pink');
	ttl1.setWeight(1);
	for (var i = 0; i < 20; i ++) {
		ttl1.forward(70);
		ttl1.left(120);
		ttl1.forward(100);
		ttl1.right(10);
	}
	//turtle 3
	ttl3.setColor('yellow');
	ttl3.setWeight(1);
	for (var k = 0; k < 10; k ++) {
		ttl3.forward(50);
		ttl3.left(55);
		ttl3.forward(60);
		ttl3.right(15);
		if (k % 9 === 0) {
			ttl3.forward(5);
		}
	}	
	// turtle 4
	ttl4.setColor('orange', 20);
	ttl4.setWeight(1);
	for (var m = 0; m < 10; m ++) {
		ttl4.forward(20);
		ttl4.left(110);
		ttl4.forward(50);
		ttl4.right(15);
		}
	//turtle 2
	ttl2.setColor('skyblue');
	ttl2.setWeight(1);
	for (var j = 0; j < 10; j ++) {
		ttl2.forward(1);
		ttl2.left(55);
		ttl2.forward(10);
		ttl2.right(15);
		if (j % 9 === 0) {
			ttl2.forward(5);
		}
	}

}

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;}

At first I wanted to create a sunflower through this, but in the end I got carried away and began adding more and more layers to the design.