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/amp/
Reference: https://p5js.org/reference/#/p5/noiseSeed