# 手把相關

:::success
新套件包有包好的函式庫 (`PicoInput`)，可以去看看
:::


## ~~VR SDK~~
:::info
**基本上所有手柄相關函式的接口都在 `Pvr_UnitySDKAPI.Controller` 底下**
e.g. `Pvr_UnitySDKAPI.Controller.UPvr_GetKey(1, Pvr_UnitySDKAPI.Pvr_KeyCode.Y)`
:::

## XR SDK

InputDevices.GetDeviceAtXRNode(XRNode.XXX).TryGetFeatureValue(CommonUsages.XXX, out bool value)

| 鍵位 | CommonUsages |
|:--------:|:--------------------------------- |
| Menu | `CommonUsages.menuButton` |
| Trigger | `CommonUsages.TriggerButton` |
| Grip | `CommonUsages.GripButton` |
| Joystick | `CommonUsages.primary2DAxisClick` |
| X/A | `CommonUsages.primaryButton` |
| Y/B | `CommonUsages.secondaryButton` |

上例是否按下的值會放在 `value`，而函式回傳結果是是否成功取得，如我們想要判斷左手柄 X 按鈕是否按下可以寫成：

if(InputDevices.GetDeviceAtXRNode(XRNode.LeftHand).TryGetFeatureValue(CommonUsages.primaryButton, out bool x) && x)
{
    // ...
}

Note: 這類似於 GetButton 而非 GetButtonDown (需要自己做按下判斷)
**(新套件包有 GetButtonDown)*

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###### References
- https://blog.csdn.net/weixin_38239050/article/details/117567561
- https://developer.pico-interactive.com/document/doc