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.
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.
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
