The draw() function is called after setup() function. The draw() function is used to executes the code inside the block until the program is stopped or noLoop() is called. If the program does not contain noLoop() function within setup() function then draw() function will still be executed once before stopping it. It should always be controlled with noLoop(), redraw() and loop() functions.
Syntax:
draw()
Below examples illustrate the draw() function in p5.js:
Example 1:
function setup() {
// Create Canvas of given size
createCanvas(400, 300);
} function draw() {
background(220);
// Use color() function
let c = color( 'green' );
// Use fill() function to fill color
fill(c);
// Draw a rectangle
rect(50, 50, 300, 200);
} |
Output:
Example 2:
function setup() {
// Create Canvas of given size
var cvs = createCanvas(600, 250);
} function draw() {
// Set the background color
background( 'green' );
// Use createDiv() function to
// create a div element
var myDiv = createDiv( 'GeeksforGeeks' );
var myDiv1 = createDiv( 'A computer science portal for geeks' );
// Use child() function
myDiv.child(myDiv1);
// Set the position of div element
myDiv.position(150, 100);
myDiv.style( 'text-align' , 'center' );
// Set the font-size of text
myDiv.style( 'font-size' , '24px' );
// Set the font color
myDiv.style( 'color' , 'white' );
} |
Output: