p5.js brightness() function

The brightness() function in p5.js is used to extract the HSB brightness value from a color or pixel array. Syntax:

brightness(c)

Parameters: This function accepts single parameter c which stores the p5.Color object, color components, or CSS color. Below programs illustrate the brightness() function in p5.js: Example 1: This example uses brightness() function to extract the HSB brightness value from a color or pixel array. javascript

function setup() {

    // Create Canvas of size 300*80
    createCanvas(300, 80);
}

function draw() {
    
    // Set background color
    background(220);
    
    // Initialize color mode to HSB
    colorMode(HSB, 255);
    
    // Initialize the parameter
    let c = color(0, 126, 100);
    
    // Sets 'value' to 100
    let value = brightness(c); 
    
    // Set the font size
    textSize(16);
    
    // Set the font color
    fill(color('red'));
    
    // Display result
    text("Brightness Value is : " + value, 50, 30);
}

Output: Example 2: This example uses brightness() function to extract the HSB brightness value and fill it as gray scale integer value. Java

function setup() {

    // Create Canvas of size 300*180
    createCanvas(300, 180);
}

function draw() {
    
    // Set background color
    background(220);
    
    // Initialize color mode to HSB
    colorMode(HSB, 255);
    
    // Initialize the parameter
    let c = color(0, 126, 100);
    
    // Sets 'value' to 100
    let value = brightness(c); 
    
    // Fill the color 
    fill(value);
    
    // Create rectangle
    rect(50, 15, 35, 70);

    // Display result
    text("Value of brightness is : " + value, 22, 110);
}

Output: Reference: https://p5js.org/reference/#/p5/brightness