Hello everyone 🙂

PS: This is my first post here, so be forgiving 🙂

Today I'd like to share with you simple but effective way of using mathematical sinus to make funny animation in console with my favourite JavaScript.

Do you have smarter or better way of doing similar example? Any suggestion is appreciated, thanks in advance. 👍

I hope someone will get inspired by this post and will create something even more creative.

This post was originally published at:

JavaScript and animated sinus in console

All code examples can be run with online runner under link:

code examples with online runner

# 1. Smile sine animation example

```
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);
```

Ouput:

code example with online runner

# 2. Crazy fast

```
function printSine(x1, x2) {
var dx = 3.14 / 4.0; // x axis step
var dy = 1.0 / 5.0; // y axis step
function printLine() {
var line = '';
for(var i = 0; i < arguments.length; ++i) {
var character = arguments[i];
for(var y = y1; y < y2; y += dy) {
line += ' ';
}
line += character;
line+= ' ';
for(var y = y2; y < 1.0; y += dy) {
line += ' ';
}
}
console.log(line);
}
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;
}, 4);
```

Ouput:

code example with online runner

# 3. Custom sine animation example

```
function printSine(x1, x2) {
var dx = 3.14 / 4.0; // x axis step
var dy = 1.0 / 5.0; // y axis step
for (var rad = x1; rad < x2; rad += dx) {
var y1 = 0.0;
var y2 = Math.sin(rad) + 1;
var line = '';
for(var y = y1; y < y2; y += dy) {
line += ' ';
}
console.log(line + '+');
}
}
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;
}, 50);
```

Ouput:

code example with online runner

# 4. Funny smiled sine example

```
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('*');
}
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;
}, 50);
```

Ouput:

code example with online runner

So, that's all for today, I hope you enjoyed this short post, leave a comment with improvement suggestions or any thoughts.

Thanks, be well and see you soon in my next post. 👍 🙂

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