Project7_curves

	// Huijun Shen  session D
    // huijuns@andrew.cmu.edu


var nPoints = 100;
//var lineGroup = [];


function setup() {
    createCanvas(400,400);
    background(180);
    frameRate(10);  
    
}


function draw() {
    background(150);
    noStroke();
    push();
    translate(width/2,height/2);
    rotate(mouseX/30); // make it rotate according to x position
    Orthotomic();
    pop();
    
} 

function Orthotomic(){ //draw the shape

    var x;
    var y;  
    noFill();
    fill(255-mouseY*0.3,mouseY*0.2,100); // make color related to y position
    stroke(3);
   
    beginShape(); // the shape
    for (var i = 0; i < nPoints; i++) {
        var t = map(i, 0, nPoints, 0, TWO_PI);
        x = constrain(mouseX,0,400)/30*cos(t);
        y = sin(t);
        var x1 =20*(x*cos(2*t)-y*sin(2*t)+2*sin(t));
        var y1 =20*(-x * sin(2*t) - y*cos(2*t) + 2*cos(t));
        vertex(x1+random(5), y1+random(5)); //make the edge a bit random lines
    }


    endShape(CLOSE);    
   
    
}