rkondrup-project-07-Composition-with-Curves

sketch

// ryu kondrup
// rkondrup@andrew.cmu.edu
// section D
// project-07-Composition-with-Curves


// http://mathworld.wolfram.com/DevilsCurve.html
function setup() {
    createCanvas(480, 480);
    frameRate(20);
    //dark grey bg
    background(40);
    stroke(255);
    fill(40);
}

function draw() {
    //to move object to center and rotate
    push();
    translate(width / 2, height / 2);
    rotate(2*PI*mouseX/480)
    drawDevilsCurve();
    pop();
}

function drawDevilsCurve() {
        var bigRange = 100;
        var t = map(i, 0, bigRange, 0, 100);
        var b = map(mouseY, 100, height-100, 0, 50);
        var a = map(mouseX, 100, height-100, 0, 200);

//to draw actual devil's curve
    fill(40);
    beginShape();
    for (var i = 0; i < bigRange; i++) {
        var t = map(i, 0, bigRange, 0, 2*PI);
//x and y for parametric equation
        var x = cos(t)*sqrt((sq(a)*sq(sin(t))) - sq(b)*sq(cos(t))/(sq(sin(t))-sq(cos(t))));
        var y = sin(t)*sqrt((sq(a)*sq(sin(t))) - sq(b)*sq(cos(t))/(sq(sin(t))-sq(cos(t))));
        // change value with mouseposition
        fill(mouseX/2, mouseX/2, mouseX/2);
        // make outline slightly lighter than fill
        stroke(mouseX/2+20, mouseX/2+20, mouseX/2+20)
        //to draw each frame
        vertex(x, y);
    }
    endShape(CLOSE);

}

function mousePressed() {
    //to reset background on click
    background(40);
}

Before starting this project I assumed it would be relatively easy. Upon starting, however, I had an unexpectedly difficult time getting my code to display. After I finally did get it to display, it turned out that the curve I had chosen was not of the highest aesthetic quality, i.e. it looks like a chunky spider. Nevertheless, I decided to work with it, and ended up choosing a monochromatic color scheme as an experiment with changing gradients.