You can access this tool from the following:
- Click Reverse Transition. The Reverse Transition dialog displays. Any of the inputs can be locked in the dialog at any time. Locking some values may limit or otherwise affect the other values.
- Select the element to construct the first or ާbackެ curve from. data point, example, left-click to accept.
- Select the offset distance from the first element. This can be selected graphically with the mouse or keyed in.
- Select the second element to construct the reverse transition to. Data point to accept.
- Select the offset distance from the second element. This can be selected graphically with the mouse or keyed in.
- Select the Transition information. This information resides in three possible inputs:
- Using the left or right arrow keys to toggle between the fields, type in the desired value and press enter to accept.
- Using the left or right arrow keys toggle to the Back Radius prompt. Define the Back Radius. This can be selected graphically with the mouse or keyed in.
- Select the Ahead Radius or the Radius Ratio information. Using the left or right arrow keys to toggle between the fields, type in the desired value and strike the Enter key to accept.
- Data point to select the starting point of the reverse transition.
- Depending on the offsets chosen, select the truncation method. Choose from the following options:
This will truncate or trim the elements used for the construction of the arc. This option is available only when the offset value(s) are set to zero.
- Optionally for complex loop geometry, if one or both radii are locked, a looping option becomes available.
Looping can be set to the following options:
Right-click on the dialog to customize it for specific tasks or user preference.
Manipulators are available for:
Back and Ahead Offsets
Drag handles to dynamically adjust the optional offset distances from both arcs
Reverse Transition rule data is also accessible in the properties.
These pre-customized versions provide a simplified prompt sequence for many common construction tools. Right-click on the Reverse Transition icon then choose Show/Hide Arc from Element Tools to access the following options:
Reverse Curve by Angle - Creates a reverse curve where the two radii are equal and user specifies a deflection angle measured from the first select element, Offsets locked at zero
Reverse Curve by Radii Ratio - Creates a reverse curve where the second curve radius is a ratio of the first curve radius. Offsets locked at zero
Reverse Curve by Tangent - Creates a reverse curve where the two radii are equal and you may specify a tangent length between the curves, Offsets locked at zero
Line at Angle - Creates a simple linear element at a deflection angle measured from the first picked element, Offsets locked at zero