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p5.js | Constants | QUARTER_PI
  • Last Updated : 10 Apr, 2019

The QUARTER_PI is a mathematical constant with the value 0.7853982. It is one quarter the ratio of the circumference of a circle to its diameter.

Syntax:

QUARTER_PI

Below program illustrates the QUARTER_PI constant in p5.js:

Example: This example describes the QUARTER_PI constant.




function setup() {
  
    // Create Canvas of size 880*300
    createCanvas(880, 300);
}
  
function draw() {
      
    // Set the background Color
    background(220);
      
    // Set the stroke color
    stroke(255, 204, 0);
      
    // Set the stroke weight
    strokeWeight(4);
      
    // Use of constant QUARTER_PI
    arc(50, 50, 280, 280, 0, QUARTER_PI/2); 
      
    noStroke();
      
    // Set font size
    textSize(20);
      
    // Display result
    text("Value of QUARTER_PI is " 
            + QUARTER_PI, 30, 150);
}


Output:

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

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