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
yfloat: y-coordinate of the point
xfloat: x-coordinate of the point
Related tan()
Updated on Tue Jul 11 06:52:23 2017.
Creative Commons License