/* Crude approximation of a sine wave

    node gen_wave_form.js

Or paste in browser developer console.
*/

const steps = 180;

let output = `
const char SINE_WAVEFORM[${steps}] = {`;

for (let i = 0; i < steps; i++) {
    if (i % 5 === 0) {
    output += `
    /* ${i} */`
    }
    output += ` ${Math.floor(255 * (1 + Math.sin(2 * Math.PI / steps * i)) / 2)},`;
}

output += `
};`;

console.log(output);