O

object keying group

A custom keying group for objects only (not characters) that describes a user-defined set of properties for object in 3d space in an animated scene when a keyframe is set. Object keying groups can be assigned to any object in a scene (as opposed to “local keying groups” which are restricted to the object(s) selected at the time the local keying group is created.).

occlusion

A problem with optical motion capture, wherein a sensor is hidden from all but three cameras. This may occur when a performer passes by an obstructing object, or when the performer’s body comes between the sensor and the camera.

opacity

The extent to which an object is transparent. If an object’s opacity is set to 100%, the object displays opaque. If the opacity is set to 0%, the object displays transparent.

OpenGL

A software interface for graphics hardware that supports rendering and imaging operations.

Optical editor

An editor that lets you correct optical data, fix poor gap interpolation, switch swapped markers, and perform other optical data reconstruction.

See also noise , occlusion , and partial occlusion .

optical mapping

The process of mapping optical motion data to an Actor.

Optical root

The main reference for imported optical data, represented in the Viewer window by a sphere.

origin

The point at the center of a 3D scene relative to which every location is defined. At the origin of a scene, the X, Y, and Z coordinates have a value of zero.

The center or reference point of a selected 3D object, relative to which the surface of the object is defined. At the origin of an object, all three 3D coordinate values have a value of zero, written as (0,0,0).

See also global coordinates and local coordinates .

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