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p5.js | rotateZ() function

• Last Updated : 28 Sep, 2021

The rotateZ() function in p5.js is used to rotate the shape or an object around the z-axis.

Syntax:

`rotateZ(angle)`

Parameters: This function accepts single parameter angle which stores the angle by which rotation is to be done.
Below programs illustrate the rotateZ() function in p5.js:
Example 1: This example uses rotateZ() function to rotate the an object around the z-axis.

javascript

 `function` `setup() {`   `    ``// Create Canvas of given size` `    ``createCanvas(580, 550, WEBGL);` `}`   `function` `draw() {` `    ``// Set the background color` `    ``background(220);` `    `  `    ``// Set stroke weight` `    ``strokeWeight(12);` `    `  `    ``// Rotation function` `    ``rotate(PI / 7.0);` `    `  `    ``// Call to rotateZ function` `    ``rotateZ(millis() / 1000);` `    `  `    ``// Draw Rectangle` `    ``rect(3, 3, 200, 39);` `    `  `    ``// Draw ellipse` `    ``ellipse(160, 160, 40, 40);` `}`

Output:

Example 2: This example uses rotateZ() function to rotate the an object around the z-axis.

javascript

 `function` `setup() {` `    `  `    ``// Create canvas of given size` `    ``createCanvas(500, 500, WEBGL);` `}` ` `  `function` `draw() {` `    `  `    ``// Set background color` `    ``background(200);` `  `  `    ``// Set property to rotate the` `    ``// shape about the z-axis` `    ``rotateZ(frameCount * 0.01);` `    `  `    ``// Set stroke weight` `    ``strokeWeight(2);` `    `  `    ``// Set fill color` `    ``fill(``"green"``);` `    `  `    ``// Draw of height 100 and radius 50` `    ``cylinder(50, 100);` `}`

Output:

Reference: https://p5js.org/reference/#/p5/rotateZ

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