Adds a floating reverse spiral-spiral-curve group, with two specified pass-through points, to an existing curve.
The two spirals bend in opposite directions. The curve bends in the opposite direction of the attachment curve. When the attachment curve (1) is edited, the spiral lengths (2, 3) and pass-through points (4, 5) do not change. The attachment point and the radius and length of the reverse curve adjust to accommodate edits to the attachment curve.
To add a floating reverse curve with spirals (from curve, two through points) off a curve
- Click the alignment. Click Alignment tab
Modify panelGeometry Editor
. - On the Alignment Layout Tools toolbar, click
Floating Reverse Curve With Spirals (From Curve, Two Points) to add a floating reverse curve with spirals off a curve. The current spiral definition is displayed at the command line.
- Specify the fixed or floating curve entity to attach to.
- Specify either the spiral in length or the A value.
Specify a new value, or press Enter to accept the value that is displayed on the command line.
- If the alignment has design criteria applied to it, the minimum value for the current design speed is displayed.
- If the alignment does not have design criteria applied to it, the default value specified in the curve and spiral settings is displayed. For more information, see Curve and Spiral Settings.
- Specify either the spiral out length or the A value.
- Specify the pass through point.
- Specify the second pass through point (end point).