The stroke() function is used to draw the lines and border around the text and shapes. The color object can be set in terms of RGB or HSB depending on the color mode. The color object can also be set as string in terms of RGB, RGBA, Hex CSS color or named color string. Syntax:
stroke( v1, v2, v3, alpha )
or
stroke( value )
or
stroke( gray, alpha )
or
stroke( values )
or
stroke( color )
Parameters:
- v1: It is used to set the red or hue value relative to current color range.
- v2: It is used to set the green or saturation value relative to current color range.
- v3: It is used to set the blue or brightness value relative to current color range.
- alpha: It is used to set the transparency of the drawing.
- value: It is used to set the value of color string.
- gray: It is used to set the gray value.
- values: It is an array containing the red, green, blue and alpha value.
- color: It is used to set the stroke color.
Below examples illustrate the stroke() function in p5.js: Example 1:Â
javascript
function setup() {       // Create Canvas of given size     createCanvas(400, 200); }   function draw() {           // Set the background color     background(220);           // Set the stroke width     strokeWeight(10);           // Set the stroke     stroke('green');         // Set the filled color     fill('white');           // Draw the circle     circle(90, 90, 34);           // Set the text size     textSize(20);           // Set the text to print     text("GeeksForGeeks", 140, 100); } |
Output: 
Example 2:Â
javascript
function setup() {           // Create Canvas of given size     createCanvas(400, 200); }   function draw() {           // Set the background color     background(220);           // Set the stroke color     stroke('orange');           // Set the stroke width to 10     strokeWeight(30); // Orange           // Draw a line     line(100, 50, 300, 50);           // Set the stroke color     stroke('white');           // Set the stroke width to 8     strokeWeight(30); // White           // Draw a line     line(100, 100, 300, 100);           // Set stroke color     stroke('green');           // Set the stroke width to 6     strokeWeight(30); // Green           // Draw a line     line(100, 150, 300, 150); } |
Output: Reference: https://p5js.org/reference/#/p5/stroke
