Add a floating spiral-curve group, with a specified radius and length, to an existing entity.
When the attachment entity (1) is edited, the spiral length (3) and curve radius (2) and length (4) do not change. You can adjust or move the attachment curve and the entire curve and spiral entity moves with it.
To add a floating curve with a spiral (from entity, radius, length) off a line
- Click the alignment. Click Alignment tab
Modify panelGeometry Editor
. - On the Alignment Layout Tools toolbar, click
Floating Curve With Spiral (From Entity End, Radius, Length) to add a floating curve with a spiral off a line. The current spiral definition is displayed at the command line.
- Specify the line entity to add to.
- Specify the radius, or enter D to specify the degree of curvature.
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.
NoteTo calculate the radius or degree of curvature using other known curve parameters, enter 'CCALC to open the Curve Calculator. For more information, see Calculating Curve Parameters. - Specify either the spiral length or the A value.
- Specify whether the curve solution angle is either greater than or less than 180 degrees.
- Specify an end point.