User Tools

Site Tools


function:ATAN2

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
function:ATAN2 [2018/09/24 02:21]
peternlewis Added clarity to argument order
function:ATAN2 [2018/09/26 00:16] (current)
peternlewis positive upwards
Line 1: Line 1:
-The ATAN2(y,x) function returns the arctangent of its two arguments. ​ The purpose of using two arguments instead of one is to to return the appropriate quadrant of the resulting angle, which is not possible for the single argument [[ATAN]] function. ​ For arguments y,x, not both zero, this function returns the angle in radians between the x-axis and the point (x,​y). ​ Note that the arguments to ATAN2 are y,x, not the usual x,y order. +The ATAN2(y,x) function returns the arctangent of its two arguments. ​ The purpose of using two arguments instead of one is to to return the appropriate quadrant of the resulting angle, which is not possible for the single argument [[ATAN]] function. ​ For arguments y,x, not both zero, this function returns the angle in radians between the x-axis and the point (x,​y). ​ Note that the arguments to ATAN2 are y,x, not the usual x,y order. ​ Also note that y is in the mathematical direction, positive upwards, unlike screen coordinates which are usually positive downwards.
  
function/ATAN2.txt · Last modified: 2018/09/26 00:16 by peternlewis