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