Yingying Yan – Project 11 Composition

/*
Yingying Yan
Section E
yingyiny@andrew.cmu.edu
Project-11
*/
//make an array so i can draw more than one flower
var ttl = [2,2,2,2,2,2,2,2,2,2,2,2,2,2,2];

function setup() {
    createCanvas(480, 240);
    background(0);
    frameRate(10);
    //set up the make turtle 
    for(var i = 0; i < ttl.length; i++) {
    	ttl[i] = makeTurtle(random(width), random(height));
    }
}

function draw() {
	for(var i = 0; i < ttl.length; i++) {
		ttl[i].setWeight = (random(0.1,5));
    	ttl[i].setColor = (random(150), random(200), random(255));
    	//start drawing the flowers
		ttl[i].penDown();
		var dd = 4
		ttl[i].forward (dd);
		ttl[i].right(dd);
		ttl[i].right(dd);
		ttl[i].forward(dd);
		ttl[i].left(dd)
		ttl[i].forward(dd * i);
		ttl[i].left(150);
	}


}
//restart the drawing
function mousePressed(){
	background(0)
}

//////////////////////////////////////////////////////////////
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;
}