You can use Motion plug-ins to control the haptic feedback of a control interface. With Wwise, you can use the same set of tools to manage motion and audio in your application. Internally, motion data is no different than audio data, and all the features available for audio are also available for motion. Two types of haptic feedback are available through the motion feature: you can transform any audio signals in your project and into motion, or generate dedicated motion signals with the Motion source. You can test motion directly in Wwise Authoring on Windows with a supported controller.

Motion Components

Motion uses the Wwise Sound Engine plug-in system to work in an application, and can be subdivided into two modules: the audio source called Motion and the Audio Device called Wwise Motion. Although the Motion audio source is optional, it remains a powerful tool to create accurate and flexible motion designs.

Wwise Motion Audio Device Plug-in

The Wwise Motion audio device plug-in links the sound engine to motion-ready devices. Just like any audio device plug-in, it receives data from a set of Listeners and "presents" this data to a device. This plug-in is inside a separate library and needs to be included in both Wwise Authoring and the application. 请参阅 Setting Up Motion 一节了解更多信息。

Motion Source Plug-in

You can use the Motion source plug-in to design the behavior of haptic feedback effects. 正如其他音频源一样，您可以将 Motion 添加至 Wwise 工程中的 Sound SFX 节点。Make sure that the Sound SFX nodes have Output Busses set to motion-ready busses. See Motion for more information.

Setting Up Motion

To use motion in your application, you need to properly set up each component. All the concepts applicable to the audio workflow are also applicable to motion. 它使用相同的总线、听者和发声体（参阅“ 集成 Listener ”）。

Wwise Authoring Setup

为了能向设备发送声音或振动数据，必须将经授权的 Wwise Motion Audio Device 添加至 Wwise 工程的 Audio Device 文件夹（位于 Project Explorer 的 Audio 选项卡中）。Wwise Motion Audio Device 是声音引擎用来与振动设备进行交互的插件。同时，必须将 Wwise Motion Audio Device 指派给顶层 Audio Bus。The term motion bus denotes a top-level Audio Bus with a Wwise Motion Audio Device assigned to it. It is good practice to use a single motion bus hierarchy in your project for easier troubleshooting and monitoring. You can then set the Output Bus of any Sound SFX to a motion bus to create haptic feedback. Usually the Sound SFX elements that use a motion bus also use a Motion source. 为了模拟音频和振动，Sound SFX 须至少拥有一条振动总线和一条音频总线（作为 Output Bus 或 Auxiliary Bus）。

Game Setup

On the game side, link with the separate library called AkMotionSink. 此库为所支持平台的标准控制器提供支持。You also need to include the AkMotionSinkFactory.h file, located under SDK\include\AK\plugin. It is important to include this file because it automatically registers the plug-in.

备注: 在 Unity 和 Unreal 中，会自动管理插件库。无需手动添加 AkMotionSink 。

有关支持的控制器及其他要求，请参阅下表。

若应用程序要在一些设备上使用振动效果，则必须为每个设备添加专用输出。比如，对于连有四个玩家的分屏游戏，需要添加四个不同的输出以便各个控制器分别接收触觉反馈。To add an output device, use the Wwise API's AK::SoundEngine::AddOutput function and specify the ShareSet name (as defined in your Wwise project) in the AkOutputSettings parameter. 另外，因为可能连接多个设备，所以还必须提供设备 ID。The following table contains more information about device IDs.

备注: On all platforms except Windows, a device ID of "0" targets the first available device that supports motion.

Remember that game controllers can be disconnected either physically or due to communication problems. Disconnection does not have any adverse effects on the sound engine other than needlessly using resources. If you think a device has been disconnected for a long time, call AK::SoundEngine::RemoveOutput and provide the AkOutputDeviceID returned by the corresponding AddOutput() function call.

Multiplayer Considerations

Motion outputs are like any other Secondary Outputs and therefore have the same restrictions and requirements. If you are making a single-player game, in which only one player controls the game locally, the Listener/Game Object setup is very simple. In normal cases, the new motion output re-uses the same default Listener as the main audio output. In other words, you rarely have to manage Listeners in a single-player setup.

For multiplayer games, you must create one Listener/Game Object for each motion output. This is necessary so that each player has their own mix of haptic feedback, depending on the situation in the game. 在 AK::SoundEngine::AddOutput() 初始化输出的同时，必须初始化与设备关联的 Listener。各个 Listener 会为声音或振动提供附加通路层。在针对只与某个玩家的 Listener 关联的 Game Object 上播放 Event 时，可让声音只被该玩家听到。To establish this association, you can call AK::SoundEngine::SetListeners. You can also associate multiple listeners with the same game object, which has a "broadcast" effect on all listeners. 请参阅 集成 Listener 了解有关Listeners和Game Objects的更多信息。

备注: A sound needs to be routed into the motion bus hierarchy even if the Emitter has a Listener set to a motion output.

示例

The following examples demonstrate how to set up your application to use motion. You can also refer to the Demo Motion example in the Integration Demo (DemoMotion.cpp) included in the SDK samples. 其中提供有所有支持平台的工作示例。

单人设置

First, as with any other plug-in, you need to include the corresponding file and link the library (for Wwise native development only, not required for Unity).

Next, add another output with the Wwise Motion Audio Device ShareSet name from the Wwise project, in this case "Wwise_Motion". The output ID is 0 to ensure that the first connected game controller is used.

Next, play an Event. In the Wwise project, the "Play_Explosion" Event is linked to a Sound SFX that is routed to a bus that has "Wwise_Motion" ShareSet assigned as its Audio Device.

多人设置

This section describes how to set up motion for multiple players on the same console, not a networked multiplayer game. In multiplayer scenarios, the mix for motion, or any player-specific output, must be different to represent the player's perspective in the game world. Players therefore need their own Listeners.

Add an output for every player. You can use an Audio Device ShareSet multiple times, so you don't have to create multiple Audio Device ShareSets. You must provide a real device ID for every controller. 本例适用于 Windows 上的 Xbox 控制器。有关如何针对特定平台检索设备 ID 的信息，请参阅“ Game Setup ”中的表格。

Next, play an Event. In the Wwise project, the "Play_GunFire" Event is linked to a Sound SFX that is routed to a bus that has "Wwise_Motion" assigned as its Audio Device ShareSet.

To play an Event that affects multiple devices, set up a new Game Object, and ensure that all player-specific Listeners listen to it.

For an example of multiplayer setup, refer to the DemoMotion class in the IntegrationDemo sample.

核对清单与故障排除

For a specific device to receive motion with one device, you must:

1. Add a Wwise Motion Audio Device ShareSet to your project.
2. Create a top-level Audio Bus and set its Audio Device to the Wwise Motion Audio Device ShareSet you just added.
3. Create Sound SFXs and route them to the motion bus hierarchy.
4. In the game, link to the AkMotionSink library. Include AkMotionSinkFactory.h and link with the AkMotionSink library.

   备注: 在 Unity 和 Unreal 中，会自动管理插件库。This step is unnecessary.

5. Create a Game Object to call and receive motion Events with AK::SoundEngine::RegisterGameObj.
6. Call Ak::SoundEngine::AddOutput with the Wwise Motion ShareSet and a device ID. For multiplayer, provide a Listener object for each.
7. Trigger your Events the same way you do for audio Events.

To add Motion to the Wwise project:

1. Add a Wwise Motion Audio Device ShareSet to your project.
2. Create a top-level Audio Bus and set its Audio Device to the Wwise Motion Audio Device ShareSet you just added.
3. Create Sound SFXs and route them to the motion bus hierarchy.
4. In the Audio Preferences, locate the busses you want to use motion with and, from the list, set the device of each bus to the motion device of your choice.

性能分析

To troubleshoot problems, we recommend that you profile your application. In Wwise Authoring, you can profile your application as described in Profiling. 您可以利用各项工具来了解问题的根源。The Capture Log view lists error codes in red. 在 Graph 视图中，可查看声音引擎管线的图示。The motion devices appear at the end of the pipeline. If no motion devices are displayed, the sound engine could not find the device you specified. Finally, the Emitter/Listener tab displays all Emitter-Listener pairs. If the Motion Effect does not work, the Emitter might not be associated with the Listener you specified for your motion device.

若触发 Motion Effect 时出现问题，请执行以下操作：

• Check the Capture Log to ensure that there are no registration errors with the plug-in. If there are, confirm that you included the AkMotionSinkFactory.h and linked to the AkMotionSink library.
• Ensure that the sound engine initialized the device. If it didn't, an error is displayed in the Capture Log when AddOutput is called from the game.
• Ensure that the Sound SFX you play is routed to a bus that leads to a motion device. Check the Audio Bus property of the Sound SFX, and the Audio Device property of the bus.
• 在 Voices Graph 选项卡中，检查触发了哪个 Emitter。Ensure that there is an associated Listener in the Emitter-Listener tab. The same Game Object can emit and listen. If there is no associated Listener, review your calls to RegisterGameObj, SetListeners, and AddOutput.
• Ensure that the Listener is associated with the desired output device.
• Review the results of any API calls you made and check for errors.

For Android devices, add the permission in the application's AndroidManifest.xml file: