p5.js noiseSeed() Function

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:

JavaScript

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/javascript/p5-js-soundfile-object-installation-and-methods/ Reference: https://p5js.org/reference/#/p5/noiseSeed

p5.js noiseSeed() Function

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