Min Jun Kim- Project 11 Composition

Move the mouse!

/*
Min Jun Kim
minjubki
15104
Project 11

Makes a turtle composition
*/

var t1, t2; //initialize turtles
var turtles = []
var inc = 0.05 //used to control pace of sin
var v = 0.5 //value for sin
var ang; //angle
var xind = []; //index for x
var yind = []; // index for y
var sumx=0; //sum of x
var sumy =0 ; //sum of y
var topdistx = 0; //distance from a certain point 
var topdisty = 0; // y distance from a certain point 

function setup() {
     createCanvas(480, 480); 
    //sets up two turtles

    t1 = makeTurtle(width/2, height/2);
    t1.setWeight(2);
    t1.setColor(255);
    t1.penDown();

    t2 = makeTurtle(0, 0);
    t2.setWeight(1);
    t2.setColor(0);
    t2.penDown();
    frameRate(500);



}


function draw() {
    background(0);
    noFill();

    //draws the grid in the background
    while(t2.y < height+10) {
        t2.forward(width);
        t2.right(90);
        t2.forward(3);
        t2.right(90);
        t2.forward(width);
        t2.left(90);
        t2.forward(3);
        t2.left(90);
        
    }
    //repeat once it finishes
    if (t2.y > height) {
        t2.goto(0,0);
    }

    //have a repeating colorshift
    t2.setColor(sin(v)*200);

    //only have the drwaing if mouse is in canvas
    if (mouseX> width || mouseY > height) {
        t1.penUp();
    }
    else {t1.penDown()};
    
    //t1.setWeight(random(5))
    strokeWeight(1);
    //find angle to mouse
    ang = int(t1.angleto(mouseX,mouseY));
    distanco = dist(mouseX,mouseY, t1.x, t1.y);
    
    rect(0,0, width-1, height-1);
    t1.forward(10+distanco/ang);
    //make drawing shift if mouse is moving
    t1.turnToward(mouseX,mouseY,ang);
    t1.goto(width/2, height/2);
    
    //make sure it is in bounds
    if(t1.x > width || t1.x < 0) {
        t1.goto(random(width),random(height));
    }
    //draw the pattern in middle
    for (var i = 0; i < 200; i++) {
        t1.forward(mouseY/5);
        t1.right(mouseX/9+90); 
        t1.forward(sin(v)*mouseY/100);
        //index values
        xind[i] = t1.x;
        yind[i] = t1.y;
        //draw exoanding points
        if (i % 2 === 0) {
            t1.forward(distanco*cos(v));
            t1.left(2);
        }
        //inverse expanding points
        if (i % 5 === 0) {
            t1.forward(50*sin(v));
            t1.right(2);
        }
        
        //make sure it stays in center
        t1.goto(width/2, height/2);
    }
    //find sum of all points
    for (i = 0; i < xind.length; i++) {

        sumx += xind[i];
        sumy += yind[i];
        
        
    }
    //make the list not too big
    if (xind.length > 100) {
        xind.pop();
        yind.pop();
    }
    //find distance to cneter
    topdistx = dist(sumx/xind.length, 0, 240, 0);
    topdistx = dist(0, sumy/xind.length, 0, 240);
    //go to cneter of drawing
    t1.goto(sumx/xind.length,sumy/yind.length);
    fill(0);
    //reset
    sumx=0;
    sumy=0;

    //controls the value for the sin and return to 0 if too high
    v += inc;
    if (v > 100) { v= 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;}

This week I wanted to draw something that could be used a music video in relation to this week’s looking outwards. I first drew patterns in the middle that changed according to the position of the mouse, then added elements that were based on time. I decided to use sin and cos and increased it with a certain value. The value could be changed to make it beat faster, but it was too overwhelming that way. Then I drew a simple grid in the background, and added color elements to it. I think that this project turned out well, and I was shocked that turtle graphics can produce such detailed programs.

Progress pics: