Composite objects utilize the PhysX physics engine. If you haven't done so already, please read the documentation for PhysX in TDW.
Composite objects are objects in TDW that have multiple "sub-objects". Sub-objects appear in output data as separate objects with separate IDs and segmentation colors.
In most cases, composite objects are synonymous with "articulated objects" in that the sub-objects are articulated joints. However, this is not always the case. Composite objects can be:
- Objects with hinged joints such as a fridge with doors
- Objects with hinged motorized joints such as a fan
- Multiple disconnected objects such as a pot with a lid
- An object with a light source such as a lamp
This lesson explains how to add and use composite objects in TDW and how to create custom composite objects. In general, creating composite objects requires a lot more knowledge of Unity Editor than creating non-articulated, non-composite objects; accordingly, the documentation for creating composite objects assumes more prior Unity Editor knowledge.