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# Interface: SteeringWheelsOps

Interfaces > Core Interfaces > SteeringWheelsOps

| Core Interfaces - Quick Navigation

The SteeringWheelsOps Interface exposes the Steering Wheels viewport navigation feature's settings to MAXScript.

Available in 3ds Max 2009 and higher.

Properties:

## Display Options

    SteeringWheelsOps.LargeWheelSize : integer : Read|Write

Get/set the Big Wheels Size value.

Values are in the range from 1 (Small) to 256 (Extra). Normal is 128.

    SteeringWheelsOps.LargeWheelOpacityFactor : double : Read|Write

Get/set the Big Wheels Opacity value.

Values are in the range from 0.5d (25%) to 3.0d (100%).

1.0d corresponds to 50%.

2.0d corresponds to 75%.

    SteeringWheelsOps.MiniWheelSize : integer : Read|Write

Get/set the Mini Wheels Size value.

Values are in the range from 1 (Small) to 256 (Extra).

64 corresponds to Normal.

128 corresponds to Large.

    SteeringWheelsOps.MiniWheelOpacityFactor : double : Read|Write

Get/set the Mini Wheels Opacity value.

Values are in the range from 0.5d (25%) to 3.0d (100%).

1.0d corresponds to 50%.

2.0d corresponds to 75%.

    SteeringWheelsOps.ShowHUDMessages : bool : Read|Write

Get/set the state of the "Show Tool Messages (Always ON for Basic Wheels)" checkbox.

    SteeringWheelsOps.ShowToolTips : bool : Read|Write

Get/set the state of the "Show Tool Tips" checkbox.

    SteeringWheelsOps.AlwaysShowWelcome : bool : Read|Write

Get/set the state of the "Always Show the Pinned Wheel on Start" checkbox.

    SteeringWheelsOps.HaveShownWelcome : bool : Read|Write

Get/set whether the Welcome screen has been shown already.

## Look Tool

    SteeringWheelsOps.InvertVerticalAxis : bool : Read|Write

Get/set the state of the "Invert Vertical Axis" checkbox.

## Walk Tool

    SteeringWheelsOps.ConstrainWalk : bool : Read|Write

Get/set the state of the "Constrain Walk Movement Angle to Ground Plane"

    SteeringWheelsOps.SpeedFactor : double : Read|Write

Get/set the Walk Tool's "Speed Factor" value.

## Zoom Tool

    SteeringWheelsOps.IncrementalZoom : bool : Read|Write

Get/set the state of the "Incremental Zoom-in" checkbox.

## Orbit Tool

    SteeringWheelsOps.PreserveSceneUp : bool : Read|Write

Get/set the state of the "Keep Scene Upright" checkbox. It controls whether to use the world Z axis as an up vector when orbiting using the Steering Wheel controls.

    SteeringWheelsOps.SelectionSensitivity : bool : Read|Write

Get/set the state of the "Selection Sensitivity" checkbox.

## Active

    SteeringWheelsOps.IsActive : bool : Read|Write

Get/set the Steering Wheel active state. When set to true, the Steering Wheel will be displayed in the viewports. When set to false, the Steering Wheel will be disabled.

Methods:

    <void>SteeringWheelsOps.StartSteeringWheelMode()

Calling this method enables the Steering Wheel mode.

    <void>SteeringWheelsOps.StopSteeringWheelMode()

Calling this method disables the Steering Wheel mode.

    <void>SteeringWheelsOps.MiniViewObjectWheel()

Calling this method switches the Mini Wheel to View Object mode.

    <void>SteeringWheelsOps.MiniTourBuildingWheel()

Calling this method switches the Mini Wheel to Tour Building mode.

    <void>SteeringWheelsOps.MiniFullNavWheel()

Calling this method switches the Mini Wheel to Full Navigation mode.

    <void>SteeringWheelsOps.FullNavWheel()

Calling this method switches the Large Wheel to Full Navigation mode.

    <void>SteeringWheelsOps.ViewObjectWheel()

Calling this method switches the Large Wheel to View Object mode.

    <void>SteeringWheelsOps.TourBuildingWheel()

Calling this method switches the Large Wheel to Tour Building mode.

    <void>SteeringWheelsOps.IncreaseWalkSpeed()

Calling this method increases the walk speed.

    <void>SteeringWheelsOps.DecreaseWalkSpeed()

Calling this method decreases the walk speed.

    <void>SteeringWheelsOps.RestoreCenter()

Calling this method restores the location of the Center.

    <void>SteeringWheelsOps.SaveOptions()

Calling this method saves the Steering Wheels options.

    <void>SteeringWheelsOps.ClearRewindHistory()

Calling this method clears the Rewind History.