# Project-11 Composition-Veronica

``````//Veronica Wang
//Section B
//yiruiw@andrew.cmu.edu
//Project-11

var turtle = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
var angle = 0; //current direction turtle is facing
var turnangle = 5; //turn angle
var incre = 0.1; //speed increment
var counter = 0; //how many times turtle had completed a full geometry

function setup() {
createCanvas(480, 300);
background(0);
frameRate(10);

//create array of turtles
for (var i = 0; i < turtle.length; i++) {
turtle[i] = makeTurtle(random(0, width), random(0, height), random(1, 3));
turtle[i].setColor(color(random(255), random(255), random(255), 60));
};
}

function draw() {
//draw turtles
for (var i = 0; i < turtle.length; i++) {
turtle[i].penDown();
turtle[i].setWeight(5);
//change turtle direction after 100 instances
if (counter < 100){
if(angle < 0 || angle > 90){
turnangle *= -5;
}
angle += turnangle;
turtle[i].forward(1);
turtle[i].right(turnangle);
turtle[i].speed += incre;
counter += 1;
}
turtle[i].speed += 0.5;
turtle[i].forward(2);
turtle[i].right(turnangle);
}

}

function mousePressed(){
turtle.push(makeTurtle(mouseX, mouseY, random(1, 3)))
turtle[turtle.length - 1].setColor(color(random(255), random(100), random(255), 60));

}

//------------------------------------------------------------------------------------

function turtleLeft(d) {
this.angle -= d;
}

function turtleRight(d) {
this.angle += d;
}

function turtleForward() {
var newx = this.x + cos(rad) * this.speed;
var newy = this.y + sin(rad) * this.speed;
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) {
var angle = this.angleTo(x, y);
if (angle < 180) {
this.angle += speed;
} else {
this.angle -= speed;
}
}

function turtleSetColor(c) {
this.color = c;
}

function turtleSetWeight(w) {
this.weight = w;
}

function turtleFace(angle) {
this.angle = angle;
}

function makeTurtle(tx, ty, vel) {
var turtle = {x: tx, y: ty,
angle: 0.0,
penIsDown: true,
color: color(128),
weight: 1,
speed: vel,
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;
}
``````

In this project I wanted to make a somewhat random drawing machine that generates geometry based on rotation and random population. I liked the aggregation of triangles in this iteration and how the rotation made them look more circular/gear like.