Autodesk CIVIL3D Tutorial - Page 231

Exercise 3: Adding Floating Curves to an Alignment In this exercise, you will add two floating curve entities to a simple alignment. First, you will add a best fit floating curve that follows the most likely path through a series of points. Then, you will add a floating reverse curve with spirals. The initial drawing shows a simple alignment consisting of three tangents with curves. In the next few steps, you will add two floating curves to the end of the alignment. For more information, see the AutoCAD Civil 3D Help topic Adding Lines, Curves, and Spirals to an Alignment. This exercise continues from Exercise 2: Adding Free Curves and Spirals to an Alignment (page 217). Add a floating curve by best fit to the alignment NOTE This exercise uses Align-2.dwg with the modifications you made in the previous exercise, or you can open Align-3.dwg from the tutorial drawings folder (page 819). 1 Pan and zoom until you can see circles D and E on the surface. 2 On the Home tab ➤ Layers panel, in the Layer Control list, in the C-POINTS row, click to turn on the C-POINTS layer. A group of points is displayed. You will use these points as a basis for creating a floating curve that follows the most likely path through the points. NOTE If the points do not appear, enter REGEN on the command line. 3 If the Alignment Layout Tools toolbar is not open, select the alignment. Right-click and click Edit Alignment Geometry. 4 In the Alignment Layout Tools toolbar, click the drop-down list . Select Floating Curve - Best Fit. 5 As prompted on the command line, click the tangent that ends in circle D (the 'entity to attach to'). 6 In the Curve By Best Fit dialog box, make sure that From COGO Points is selected. Click OK. Exercise 3: Adding Floating Curves to an Alignment | 219