project-11

For this project I decided I wanted to play around with how turtles worked and what they could look like, so I didn’t start out with anything specific in mind. I ended up with someone that looks almost like electricity – it reminded me of a plasma globe!

The screenshots of it don’t look very cool, you really have to view it in motion.

sketch

/*
* Rachel Griswold
* rgriswol@andrew.cmu.edu
* Section B
* Project 11
*
*/

var turtles = [];
function setup() {
    var colors =[color(250, 45, 125), color(113, 222, 241),
        color(175, 230, 51), color(183, 140, 255), color(255), color(253, 162, 35)];

    createCanvas(600, 600);

    for(i = 0; i < colors.length; i++){ // creates multiple turtles
        var turt = makeTurtle(width/2,height/2);
        turt.setColor(colors[i]);
        turt.penDown
        turtles.push(turt);
    }
}

function draw() {
    background(0);
    fill(0);
    ellipse(300, 300, 300, 300);

    for(i = 0; i < turtles.length; i++){
        turtles[i].forward(random(50));
        turtles[i].left(random(100));
        turtles[i].forward(random(50));
        turtles[i].right(random(50));
        if(turtles[i].distanceTo(300, 300) > 300){
            turtles[i].goto(300, 300);
        }
    }

   
}

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;}