The noiseSeed() function is used to set a seed value for the noise() function. The noise() function, by default returns a number that is semi-random, meaning that the noise value would be the same for a coordinate only until the program is running. Running the program for the next time would yield a different value.
These noise values can be made constant by setting a non-changing seed value in the program so that it returns the same values every time when the program is run.
Syntax:
noiseSeed( seed )
Parameters: This function accepts a single parameter as mentioned above and described below:
- seed: This parameter holds a number which represents the seed value.
Return Value: This function does not return any value.
Below example illustrates the noiseSeed() function in p5.js:
Example:
let x_coordinate = 0.0; let plot_y = 0.0;    function setup() {     createCanvas(400, 200); }    function draw() {        // Specifying a noise seed value     noiseSeed(100);        if (x_coordinate < 10) {                   // Get noise with x coordinate         x_noise = noise(x_coordinate);              // Output the noise along with         // its corresponding coordinate         coord_text = "Noise for x coordinate "            + x_coordinate + " is " + x_noise;                   text(coord_text, 10, plot_y);            // Increment the x coordinate         x_coordinate++;            // Increase the y coordinate         // for plotting         plot_y = plot_y + 15;     } } |
Output: The values are constant every time the program is run.
- Running the program for the first time:
- Running the program for the second time:
Online editor: https://editor.p5js.org/
Environment Setup: https://www.geeksforgeeks.org/p5-js-soundfile-object-installation-and-methods/
Reference: https://p5js.org/reference/#/p5/noiseSeed
