p5.js | atan() Function

The atan() function in p5.js is used to calculate the inverse of tan() or arc tangent of a value ranging in between -Infinity to Infinity (exclusive) and gives result in the range of -π/2 to π/2.

Syntax:

atan(P)

Parameters: This function accepts a parameter “P” which is a value ranging from -1 to 1 and whose arc tangent is calculated.

Return Value: It returns the arc tangent of a value and its range is in between -π/2 to π/2.

Below program illustrates the atan() function in p5.js:

Example: This example uses atan() function to get arc tangent of a value.

 function setup() {         // Create Canvas of size 270*80      createCanvas(550, 130);  }     function draw() {             // Set the background color      background(220);             // Initialize the parameter with some values     let a = 0;      let b = 88;          let c = -1;         let d = -0.5;         let e = 5;            // Call to atan() function      let v = atan(a);         let w = atan(b);         let x = atan(c);         let y = atan(d);         let z = atan(e);            // Set the size of text      textSize(16);             // Set the text color      fill(color('red'));           // Getting arc tangent value      text("Arc tangent value of 0 is : " + v, 50, 30);         text("Arc tangent value of 88 is : " + w, 50, 50);         text("Arc tangent value of -1 is : " + x, 50, 70);         text("Arc tangent value of -0.5 is : " + y, 50, 90);         text("Arc tangent value of 5 is : " + z, 50, 110);      }

Output: Reference: https://p5js.org/reference/#/p5/atan

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