Lévy C Curve Algorithm (In P5.js)

p5-levy-c-curve.js

let x;
let y;
let len;
let alpha_angle;
let iteration_n;
let B;
let G;

function toRadians(degrees) {
    return degrees * (PI / 180);
}

function c_curve(x, y, len, alpha_angle, iteration_n) {
    let fx = x;
    let fy = y;
    let length = len;
    let alpha = alpha_angle;
    let it_n = iteration_n;

    if (it_n > 0) {
        length = (length / sqrt(2));
        c_curve(fx, fy, length, (alpha + 45), (it_n - 1));
        fx = (fx + (length * cos(toRadians(alpha + 45))));
        fy = (fy + (length * sin(toRadians(alpha + 45))));
        c_curve(fx, fy, length, (alpha - 45), (it_n - 1));
    } else {
        let d = dist(fx, fy, width / 2, height / 2);
        strokeWeight(map(d, 0, width, 0, 6));
        stroke(map(d, 0, width, 0, 255), G, B);
        line(fx, fy, (fx + (length * cos(toRadians(alpha)))), (fy + (length * sin(toRadians(alpha)))));
    }
}

function setup() {
    createCanvas(600, 500);
    background(51);

    x = 170;            // Stating x value
    y = 150;            // Stating y value
    len = 250;          // Stating length value
    alpha_angle = 0;    // Stating angle value
    iteration_n = 12;   // Stating iteration value
    B = random(40, 100);
    G = random(40, 100);

    c_curve(x, y, len, alpha_angle, iteration_n);
}