//

// Jared Donovan 2022

//

// Simple demo of 1-dimensional perlin noise

​

function setup(){

  // xSample will be the point from which we sample the noise.

  let xSample = 0.0;

​

  // The inc is how far we move the sample point each time we sample

  let inc = 0.02;

​

  createCanvas(700, 100);

  background(200);

  stroke(0);

​

  // Loop across the width of the screen.

  // Each time, sample the noise() function and use this to draw a line

  // with a varying length.

  for (let x = 0; x < width; x = x + 1) {

    // The noise function will return a value between 0..1.

    let n = noise(xSample);

​

    // Use the noise value to give a length 

    // Scale from 0..1 to 0..height

    let len = n * height;

    line(x, height, x, height - len);

​

    // Move the sample point, so next time we get a bit different value.

    xSample = xSample + inc;

  }

}