- u -

• U : SoKeyboardEvent
• UNDERSCORE : SoKeyboardEvent
• UNIFORM_SCALING : SoTabPlaneDragger
• UNKNOWN : SoButtonEvent
• UNKNOWN_FACE_TYPE : SoShapeHints , SoShapeHintsElement
• UNKNOWN_ORDERING : SoShapeHints , SoShapeHintsElement
• UNKNOWN_SHAPE_TYPE : SoShapeHints , SoShapeHintsElement
• UNPICKABLE : SoPickStyle , SoPickStyleElement
• UNTIL_LOADED : SoWWWInline
• UP : SoButtonEvent
• UP_ARROW : SoKeyboardEvent
• USE_PICK : SoDragger
• USER_AXIS_ADJUST : SoTrackballDragger
• USER_AXIS_ROTATE : SoTrackballDragger