IDirect3DRMFrame, IDirect3DRMFrame2, and IDirect3DRMFrameArray Interfaces
The term frame is derived from an object's physical frame of reference. The frame's role in Retained Mode is similar to a window's role in a windowing system. Objects can be placed in a scene by stating their spatial relationship to a relevant reference frame; they are not simply placed in world space. A frame is used to position objects in a scene, and visuals take their positions and orientation from frames.
A scene in Retained Mode is defined by a frame that has no parent frame; that is, a frame at the top of the hierarchy of frames. This frame is also sometimes called a root frame or master frame. The scene defines the frame of reference for all of the other objects. You can create a scene by calling the IDirect3DRM::CreateFrame method and specifying NULL for the first parameter.
The IDirect3DRMFrame2 interface is an extension of the IDirect3DRMFrame interface. IDirect3DRMFrame2 has methods that enable using materials, bounding boxes, and axes with frames. IDirect3DRMFrame2 also supports ray picking.
By using the IDirect3DRMFrame2::SetAxes method and using the right-handed projection types in the D3DRMPROJECTIONTYPE structure with the IDirect3DRMViewport::SetProjection method, you can enable right-handed projection.
For related information, see IDirect3DRMFrame and IDirect3DRMFrame2.
This section describes frames and how your application can use them.