Sources can be defined within plugins so that third parties can build their own without having to change Engine code. Sources are how data gets into the Live Link client. Supported Roles include Cameras, Lights, Characters, Transforms, and a Basic role (for generic data). This allows for the data to be more easily mapped to a target Actor within the Engine. Live Link also utilizes a concept of Roles that define how incoming data should be used. This can either be a straight copy of the latest received data or an interpolated frame created by buffering the incoming data and playing it back with a user-definable delay. The client is also responsible for building up the next frame of data to be used by the Engine. One or more 'frames' of data (like the bone transforms for the animation role). Static data that doesn't change (like the Skeleton for an animation role.). One animating character would be a subject for instance.Ī subject is made up of the following data: Manage Subjects: Subjects are individual streams of data within the client. Manage Sources: These are the sources of data and mostly represent connections to other applications, either on the same machine or across the network, that provide data to Live Link. The hub of Live Link is the Live Link Client that is created when the Live Link plugin is enabled inside a project. Motion Capture Systems can also use Live Link to stream data into the Engine that can be previewed in real-time. With DDC tools like Maya or Motionbuilder, Live Link provides a way for you to edit animations externally while seeing a preview of your work inside Unreal Engine in real-time. It is designed to be extensible through Unreal Plugins, allowing third parties to develop new features-hopefully with no need to make, then maintain Engine changes. The purpose of Live Link is to provide a common interface for streaming and consuming animation data from external sources (for example, DDC tools or Mocap Servers) into Unreal Engine.

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