p5.js | Mouse | pmouseX

The pmouseX variable in p5.js is used to store the horizontal position of the mouse cursor in the frame previous to the currently active frame, relative to the origin of the canvas.

Syntax:

mouseX

Below programs illustrate the pmouseX variable in p5.js:

Example 1: This example uses pmouseX variable to draw mouse pointer as circle.

function setup() {

    // Create canvas
    createCanvas(1000, 400);
}

function draw() {

    // Set the background color
    background(244, 248, 252);

    // Fill color relative pmouseX,
    // pmouseY and mouseY
    fill(pmouseX%255, pmouseY%255, mouseY%255);

    // Draw circle
    circle(pmouseX, mouseX, pmouseX%100);
}

Output:

Example 2: This example uses pmouseX variable to display the position of mouse pointer.

function setup() {

    // Create canvas
    createCanvas(1000, 400);

    // Set font size
    textSize(20);
}

function draw() {

    // Set background color
    background(200);

    // Display result
    text("Position of pmouseX is "
        + pmouseX, 30, 40);
}

Output:

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