atan2()#

Calculates the angle (in radians) from a specified point to the coordinate origin as measured from the positive x-axis.

Examples#

1def draw():
2    py5.background(204)
3    py5.translate(py5.width/2, py5.height/2)
4    a = py5.atan2(py5.mouse_y - py5.height/2, py5.mouse_x - py5.width/2)
5    py5.rotate(a)
6    py5.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.

This function makes a call to the numpy atan2() function.

Syntax#

atan2(y: Union[float, npt.ArrayLike], x: Union[float, npt.ArrayLike]) -> Union[float, npt.NDArray]

Parameters#

  • x: Union[float, npt.ArrayLike] - x-coordinate of the point

  • y: Union[float, npt.ArrayLike] - y-coordinate of the point

Updated on February 26, 2022 13:22:44pm UTC