atan2() \ Language (API)

Processing
p5.js
Processing.py
Processing for Android
Processing for Pi

Processing Foundation

Name

atan2()

Examples

def draw(): 
 background(204)
 translate(width/2, height/2)
 a = atan2(mouseY-height/2, mouseX-width/2)
 rotate(a)
 rect(-30, -5, 60, 10)

Description

Calculates the angle (in radians) from a specified point to the coordinate origin as measured from the positive x-axis. Values are returned as a float in the range from PI to -PI. The atan2() function is most often used for orienting geometry to the position of the cursor. Note: The y-coordinate of the point is the first parameter, and the x-coordinate is the second parameter, due the the structure of calculating the tangent.

Syntax

atan2(y, x)

Parameters

y	float: y-coordinate of the point
x	float: x-coordinate of the point

tan()

Updated on Tue Feb 27 14:07:12 2024.

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Creative Commons License

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