Month: November 2017

sketch

//Steph Chun
//Section A
//heeseoc@andrew.cmu.edu
//Project-11

var turtle, turtle2;
var angle = 20;
var side = 5;
var angle2 = 160;
var side2 = 10;

function setup(){
    createCanvas(400,400);
    background(20,20,50);
	frameRate(10);
	//circular geometric shape
	turtle = makeTurtle(random(0,width), random(0,height));
	//spikey geometric shape expanding from the center
	turtle2 = makeTurtle(width/2, height/2);
}

function draw(){
	stroke(255);
	strokeWeight(.8);
	textSize(14);
	text("click anywhere!", 5, 20);

	//circular geometric shape 
	for (var i = 0; i < 30; i++){
		turtle.setColor(color(random(150,255), random(200,255), random(200,255)));
	    turtle.penDown();
	    turtle.setWeight(.2);
	    turtle.left(angle);
	    turtle.forward(side);
}
	turtle.right(10);
    side += .5;

    //spikey geometric shape expanding from the center
	turtle2.setColor(color(random(150,255), random(200,255), random(100,255)));
    turtle2.penDown();
    turtle2.setWeight(.3);
    turtle2.left(angle2);
    turtle2.forward(side2);
    turtle2.right(5);
    side2 += 2;

}

//creating spiral shape on mouseclick 
function mousePressed(){
	turtle = makeTurtle(mouseX, mouseY);
}


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;}

While I was exploring what I can do with turtles, I noticed how I can make interesting spirals through drawing lines and manipulating angles. At first, I was trying to execute these (not-so-exactly) circular spirals with some random factors on mouseclick, but then it looked somewhat boring with only those on a dark background. So I re-generated one of the spirals that I thought was interesting and placed it at the center. After a while I left the code alone, it made this interesting circular shape even though it started off as a rather angular and spikey shape, which I thought resonated with the circular shapes that are being created on mouseclick. I liked how it has an interactive component, but later on, the user is like swallowed by the dense spiral and notice the connection between the two seemingly different elements.

sketch-132.js

//shariwa sharada 
//ssharada@andrew.cmu.edu
//section a 
//project 11

//setting initial starting points for the turtles
dx = 127
dX = 127

function setup(){
  createCanvas(200, 480);

//creating the turtles using the below trutle commands
  turtle  = new makeTurtle(dx+20, 50);
  turtle2  = new makeTurtle(dx+50, 305);
  turtle3  = new makeTurtle(dx+90, 255);
  turtle4  = new makeTurtle(dx-60, 285);
  turtle5  = new makeTurtle(dx-90, 0);
  turtle6  = new makeTurtle(dx-110, 275);
  turtle7  = new makeTurtle(dx+100, 575);

}

function draw(){

  background(0, 10);
  noFill();

//drawing turtle shapes
  drawShape1();
  drawShape2();
  drawShape3();
  drawShape4();
  drawShape5();
  drawShape6();
  drawShape7();

}

//creating the different circles 
//sizing is varied using  the size of the object moving forward
//speed of the circles moving is depedent on the angle

//the stroke weight of each line depends on the position of the y point of the cursor
//radius of each circle is dependent on the mouseX cursor position

function drawShape1(){
    turtle.setWeight(1 + mouseY/30)
    turtle.right(2 + mouseX/100);
    turtle.forward(1);
}

function drawShape2(){
    turtle2.setWeight(random(2 + mouseY/30,9 + mouseY/30))
    turtle2.right(-3 );
    turtle2.forward(4 + mouseX/100);
}

function drawShape3(){
    turtle3.setWeight(random(1 + mouseY/30, 2 + mouseY/30))
    turtle3.right(6 + mouseX/150);
    turtle3.forward(10);
}

function drawShape4(){
    turtle4.setWeight(random(3 + mouseY/30,6 + mouseY/30))
    turtle4.right(10);
    turtle4.forward(6 + mouseX/175);
}

function drawShape4(){
    turtle4.setWeight(random(4 + mouseY/30, 2 + mouseY/30))
    turtle4.right(10);
    turtle4.forward(6 + mouseX/200);
}

function drawShape5(){
    turtle5.setWeight(random(3 + mouseY/30,6 + mouseY/30))
    turtle5.right(7);
    turtle5.forward(20 + mouseX/225);
}

function drawShape6(){
    turtle6.setWeight(random(1 + mouseY/30, 5 + mouseY/30))
    turtle6.right(-7);
    turtle6.forward(13 + mouseX/250);
}

function drawShape7(){
    turtle7.setWeight(random(1 + mouseY/30, 5 + mouseY/30))
    turtle7.right(-4);
    turtle7.forward(10 + mouseX/250);
}


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

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(255, random(40, 110)),
                  weight: 5,
                  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 project I was inspired by brush strokes and watercolour paint because of which I tried to create these circles by making the flow of the circles the brush stroke style. As the cursor moved, the thickness of the stroke changes like the brush stroke.

^thin line weights with a lower mouseY value

^thick line weights with a higher mouseY value