轴

位置（）

The controller.axis.position() command returns the current position of the specified Controller’s axis as a percentage.

目的	描述
axis	Which axis to report the position of: axis1 - Left and right of the right joystick. axis2 - Up and down of the right joystick. axis3 - Up and down of the left joystick. axis4 - Left and right of the left joystick.

返回： +/- 100 范围内的值。

# Print the position of the current Controller's axis to the
# Brain's screen.
brain.screen.print(controller.axis1.position())

已更改()

The controller.axis.changed(callback, arg) command registers a function to be called when the specified axis’ value changes.

目的	描述
axis	Which axis to report the position of: axis1 - Left and right of the right joystick. axis2 - Up and down of the right joystick. axis3 - Up and down of the left joystick. axis4 - Left and right of the left joystick.

范围	描述
callback	当轴值改变时调用的函数
arg	**可选。**用于将参数传递给回调函数的元组

**返回：**事件类的一个实例。

# Define a function axis_changed().
def axis_changed():
    # The Brain will print that the axis changed on the
    # Brain's screen.
    brain.screen.print("axis changed")

# Run axis_changed() when the value of axis1 changes.
controller.axis1.changed(axis_changed)