atan2() \ Language (API) \ Wiring 1.0 (ALPHA)

| Index

| Reference for Wiring 1.0 (ALPHA) 0021+. If you have a previous version, use the reference included with your software. If you see any errors or have any comments, let us know.

Name |  | ### atan2()
Examples |  |
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 due the the structure of calculating the tangent.
Syntax |  |
    atan2(y, x);
Parameters |  |
y |  | int or float: y-coordinate of the point
x |  | int or float: x-coordinate of the point
Returns |  | float
Usage |  | Web & Application
Related |  | tan()