Name  atan2() 


Examples  void draw() { background(204); translate(width/2, height/2); float a = atan2(mouseYheight/2, mouseXwidth/2); rotate(a); rect(12, 5, 24, 10); } 

Description  Calculates the angle (in radians) from a specified point to the coordinate origin as measured from the positive xaxis. 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 ycoordinate of the point is the first parameter and the xcoordinate is the second due the the structure of calculating the tangent.  
Syntax  atan2(y, x); 

Parameters 


Usage  Web & Application  
Related  tan() 