- o -
- oa
: SoCalculator
- oA
: SoCalculator
- oB
: SoCalculator
- ob
: SoCalculator
- objectCenter
: SoComputeBoundingBox
- oC
: SoCalculator
- oc
: SoCalculator
- oD
: SoCalculator
- od
: SoCalculator
- off
: SoOnOff
- oldTopSep
: SoInteractionKit
, SoSeparatorKit
- on
: SoBlinker
, SoClipPlane
, SoElapsedTime
, SoLight
, SoOnOff
, SoPendulum
, SoPolygonOffset
, SoRotor
, SoShuttle
, SoTimeCounter
- openedHere
: SoInputFile
- operation
: SoBoolOperation
- orderedRGBA
: SoPackedColor
, SoVertexProperty
- orientation
: SoCamera
- orientToEye
: SbCylinderProjector
, SbPlaneProjector
, SbSphereProjector
- origin
: SoArray
, SoGLUpdateAreaElement
- output
: SoBoolOperation
, SoConcatenate
, SoCounter
, SoGate
, SoInterpolate
, SoSelectOne
, SoTimeCounter
, SoTriggerAny
- overrideBlending
: SoLazyElement::ivStateStruct