提要本文主要介绍了如何在Unity中接入Xbox360的手柄。当我们调Input GetAxis( "Horizontal ")，我们调了什么Unity中所有关于输入的设置都在Edit -> Project Setting -> Input里面，点开之后，Inspector面板
提要
本文主要介绍了如何在Unity中接入Xbox360的手柄。
当我们调Input.GetAxis("Horizontal")，我们调了什么
Unity中所有关于输入的设置都在Edit -> Project Setting -> Input里面，点开之后，Inspector面板中就会显示当前的输入设置。
几个重要选项的含义有:
Gravity
How fast will the input recenter. Only used when the Type is key / mouse button.
Dead
Any positive or negative values that are less than this number will register as zero. Useful for joysticks.
Sensitivity
For keyboard input, a larger value will result in faster response time. A lower value will be more smooth. For Mouse delta the value will scale the actual mouse delta.
Snap
If enabled, the axis value will be immediately reset to zero after it receives opposite inputs. Only used when the Type is key / mouse button.
Invert
If enabled, the positive buttons will send negative values to the axis, and vice versa.
Type
Use Key / Mouse Button for any kind of buttons, Mouse Movement for mouse delta and scrollwheels, Joystick Axis for analog joystick axes and Window Movement for when the user shakes the window.
上图中，定义了键盘上的a键，d键，小键盘上的左和右控制了 "Horizontal" 的输入。而且实际情况中直接插上360的手柄，通过左边的摇杆， Input.GetAxis("Horizontal")也能够获得输入值，原因是后面还定义了一个 "Horizontal" 的输入。
这里定义了一个 Joystick Axis类型的输入，输入的轴是X， 从所有手柄获取输入。因为有了这个，Input.GetAxis("Horizontal")就可以直接获取手柄的值了。接下来看怎么扩展到手柄的按键和其他的摇杆。
扩展到手柄的按键和其他的摇杆
首先看一下手柄按键 的分布图。
有了这个就可以自定义手柄的输入了。
比如要 通过 Input.GetButtonDown("Action"); 来判定是否攻击，关联的是手柄上的A键， 我们只需要如下图设置
再比如右边的摇杆，横向是这样
取值的话是这样
Input.GetAxis("RightHorizontal")) Input.GetAxis("RightVertical"))
其他的按键或者摇杆用同样的方式设置就可以了。
参考
Input Manager - http://docs.unity3d.com/Manual/class-InputManager.html
Xbox 360 Joystick Controller + - Unity http://bobstudios-en.blogspot.com/2012/09/xbox-360-joystick-controller-unity.html
附录：sony ps4 joystick map
ButtonsSquare = joystick button 0X = joystick button 1Circle = joystick button 2Triangle= joystick button 3L1 = joystick button 4R1 = joystick button 5L2 = joystick button 6R2 = joystick button 7Share = joystick button 8Options = joystick button 9L3 = joystick button 10R3 = joystick button 11PS = joystick button 12PadPress= joystick button 13Axes:LeftStickX = X-AxisLeftStickY = Y-Axis (Inverted?)RightStickX = 3rd AxisRightStickY = 4th Axis (Inverted?)L2 = 5th Axis (-1.0f to 1.0f range, unpressed is -1.0f)R2 = 6th Axis (-1.0f to 1.0f range, unpressed is -1.0f)DPadX = 7th AxisDPadY = 8th Axis (Inverted?)
