To Add Floating Tangents to Profiles

To add a floating vertical tangent with a specified pass-through point

Add a floating vertical tangent by specifying an attachment entity and a pass-through point.

The figure shows a floating tangent from an attached entity (1) to a pass-through point (2).

1. Click the profile. Click Profile tabModify Profile panelGeometry Editor Find.
2. On the Profile Layout Tools toolbar, click Float Tangent (Through Point).
3. Specify the fixed or floating curve to which you want to attach the tangent.
4. Specify the pass-through point.

To add a floating vertical tangent by best fit

You can define the best fit entity using a series of AutoCAD Civil 3D points, AutoCAD points, existing entities, or clicks on screen.

The illustration shows a floating vertical tangent created by best fit from an existing endpoint (1). The Xs indicate the data points used to create the entity.

Note: Each best fit profile entity is drawn to the vertical scale set in the profile view style. To create an accurate best fit entity, set the profile view style Vertical Exaggeration value to 1.000 to match the horizontal scale of the profile view.

1. Set the profile view style Vertical Exaggeration value to 1.0000.
2. Click the profile. Click Profile tabModify Profile panelGeometry Editor Find.
3. On the Profile Layout Tools toolbar, click Float Tangent - Best Fit.
4. Select an existing fixed or floating profile entity to which to attach the best fit tangent.
5. In the Tangent by Best Fit dialog box, select one of the following:
   • From COGO Points. In plan view, select two or more points. Enter G to select a point group or N to enter points by number.
   • By Clicking On The Screen. Select a starting point and at least one other point. You can use OSNAP or transparent commands to select points.
   • From Entities. Specify the tessellation and mid-ordinate tolerance settings. You can select one or more of the entity types listed on the command line. If you selected a profile entity, specify the starting and ending station on the Specify Station Range dialog box.
   As you select points or entities in the drawing window, an X marks each regression point and a temporary, dashed line is displayed in real time. Press Enter to complete the command.
6. In plan view, select two or more points. Enter G to select a point group or N to enter points by number.

   As the points are selected in plan view, an X marks each regression point and a temporary, dashed tangent is displayed in the profile view.

7. Press Enter to complete the command.
8. In the Panorama window, use the Regression Data vista to modify the regression points.

   As you highlight a row in the Regression Data vista, the corresponding regression point in the drawing window is highlighted in red.

9. Create the tangent:
   • Click to create the tangent and keep the Regression Data vista open.
   • Click to create the tangent and close the Regression Data vista.