JavaScript and animated sinus in console example 1

JavaScript and animated sinus in console example 1

// 👍 ✔ originally posted on:
// https://dirask.com/posts/JavaScript-and-animated-sinus-in-console-VjvxlD
// we can run this code online under above link ☘
// 
function printSine(x1, x2) {
    var dx = 3.14 / 4.0; // x axis step
    var dy = 1.0  / 5.0; // y axis step

    function printLine(character) {
        var line = '';

        for(var y = y1; y < y2; y += dy) {
            line += '.';
        }

        console.log(line + character);
    }

    for (var rad = x1; rad < x2; rad += dx) {
        var y1 = 0.0;
        var y2 = Math.sin(rad) + 1;

        printLine('😃');
    }
}

var x1 = 0.0;     // begining of sinus chart
var x2 = 6 * 3.14 // end of sinus chart

setInterval(function() {
    console.clear();
    printSine(x1, x2);

    x1 += 0.3;
    x2 += 0.3;

}, 40);