Note: This functionality is only available in AutoTURN Pro.

Generates the simplest and most commonly used type of 3D turn simulation on a terrain (see Overview -> Current Terrain). It generates a 3D path that follows an arc from the start position to the position of the mouse on a selected terrain.

Generate 3D Arc Path Dialog Box

Switch to Forward/Reverse

For forward maneuvers, the Switch to Reverse button changes the maneuver to a reverse maneuver.

For reverse maneuvers, the Switch to Forward button changes the maneuver to a forward maneuver.

Maneuver Type

Indicates which direction and what type of section (forward or reverse) is being generated for the selected SmartPath Tool.

Current Vehicle

Displays the current vehicle's library and name (see Vehicles -> Select Current Vehicle).

Steering Lock Angle or Reverse Overrides

Indicates whether the vehicle’s steering specifications or reverse overrides are being used while generating the simulation. When a forward simulation is being generated, the vehicle’s steering lock angle will always be used. When generating a reverse simulation, the Reverse Overrides settings (see Program Settings -> Vehicle Defaults Category: Reverse Overrides) will be used if they are greater than the steering specifications for the vehicle.

Speed

Sets the speed at which the vehicle is traveling.

Note:

• The speed value only affects the minimum turning radius, as opposed to the speed values indicated in the speed profile report which are the maximum speeds achievable at any given point of time (see Speed Profile Report).
• For forward maneuvers, the maximum allowed speed is 45 mph (70 km/h). Reverse maneuvers are conducted at 6 mph (10 km/h) or less.

Turn Wheels From Stop

When this checkbox is not selected, the vehicle is assumed to be starting the maneuver at the speed specified. The vehicle’s lock to lock time and speed are used to create a transition zone in the generated path. In this zone, the vehicle’s steering wheels turn at a linear rate until they reach the angle at which the mouse position can be reached.

When this checkbox is selected, the vehicle is assumed to be starting the section from a complete stop. This allows the steering wheels to be turned while the vehicle is stopped, allowing the vehicle to proceed at a constant steering angle to the mouse position. This option is only available in the Generate Arc Path and Generate Corner Path SmartPath Tools and only at very slow speeds (6 mph (10 km/h) or less), and should only be used when maneuvering space is at a premium.

Note: For reverse maneuvers, the Turn Wheels From Stop checkbox is selected automatically, and the checkbox is not available.

Force Straight Line

If this checkbox is selected, the vehicle will travel along a straight line only.

For a forward arc path section, if the Turn Wheels From Stop checkbox is selected, the straight line can be generated in any direction that the steering wheels can turn.

For a reverse arc path section, the Force Straight Line checkbox is only available if the current vehicle is a single part vehicle, and the section will be in line with the vehicle.

Note: When the Force Straight Line checkbox is selected, the maneuver type will change to Forward Line Path (or Reverse Line Path) and the Radius Type list and the Radius information will be unavailable.

Dynamically Check Simulation

Select this checkbox to be notified of conflicts while generating each section of the simulation. When this checkbox is cleared, the simulation is checked after each section has been generated.

Note: Dynamically checking the simulation for conflicts puts a heavy load on the computer's processing power, therefore this option should be used with discretion.

Radius Type

Select one of the following radius types:

• Centerline - radius is measured to the middle of the front steering axle group
• Curb to Curb - radius is measured to the outside front tire track envelope
• Wall to Wall - radius is measured to the outside vehicle body envelope
• Inner Turn - radius is measured to the inside rear tire track envelope

The Radius value is displayed for this type.

Radius

An edit box is provided to set the desired radius value for the selected radius type.

Note: AutoTURN Pro will not allow a radius to be set to a smaller value than the minimum radius capabilities for the current vehicle at the current speed.

Section's Minimum Radius

To specify a minimum radius that will be applied to the new section of a simulation, select this checkbox, and then type the desired value in the box on the right.

Superelevation

Displays the superelevation (i.e. slope) of the road surface. This value is considered in determining the minimum turn radius, and is only available at speeds of 10 mph (16 km/h) or greater. Select the Set checkbox to override the default value.

Note: In the SmartPath Tools, superelevation is limited to the range of -0.1 to 0.1.

Lateral Friction

Displays the friction factor between the vehicle’s tires and the road surface. This value is considered in determining the minimum turn radius, and is only available at speeds of 10 mph (16 km/h) or greater. Select the Set checkbox to override the default value.

Shrink/Expand

Click Shrink to reduce the SmartPath Tools dialog box to its minimum size to increase the working space in the drawing area.

Click Expand to return the SmartPath Tools dialog box to its full size.

Undo

Deletes the last generated section.

Hint: Alternatively, an undo operation can be performed by clicking inside the wheelbase of the last vehicle position generated.