mandle.peach

let width = 40.0;
let height = 20.0;

let zoom = 0.7;

let movex = -0.5;
let movey = 0.0;

let max_iters = 15;

let shades = ['.', '$', '%'];
let newre = 0.0;
let oldre = 0.0;
let newim = 0.0;
let oldim = 0.0;

func mandlebrot(x, y) {
    let z = 0.0;
    newre = 0.0;
    newim = 0.0;

    let pr = 1.5*(x - width/2.0)/(0.5*zoom*width)+movex;
    let pi = (y - height/2.0)/(0.5*zoom*height)+movey;

    let n = 0;
    let checkn = 0.0;

    while n < max_iters {
        oldre = newre;
        oldim = newim;
        newre = oldre*oldre-oldim*oldim+pr;
        newim = 2.0*oldre*oldim+pi;

        checkn = newre*newre+newim*newim;
        if (checkn > 4.0) {
            io.write(shades[(n % 3)]);
            return 0;
        }
        n += 1;
    }
    io.write(' ');
}

func calc_line() {
    let x = 0.0;
    let y = 0.0;
    while y < height {
        while x < width {
            mandlebrot(x, y);
            x += 1.0;
        }
        io.write('\n');
        x = 0.0;
        y += 1.0;
    }
}
calc_line();