Use AutoCAD objects such as 3D lines to add surface point data to the surface definition.
The selected AutoCAD objects are interpreted based on their points, and specific point data is created for each object type that you add to the surface definition.
For several object types, you can specify whether to maintain the object edges when adding the object points to AutoCAD Civil 3D.
Note: Drawing objects added to the surface are added as point data. After the point data has been added to the surface there is no relationship between the surface and the original drawing objects.
You can select the following AutoCAD drawing objects to add points to a surface definition:
- Points. The XYZ coordinates of the object are used to define the surface point.
- Lines. The XYZ coordinates of the object endpoints are used to define surface points.
- Blocks. The block insertion point XYZ coordinates are used to define the surface point.
- Text. The text insertion point XYZ coordinates are used to define the surface point.
- 3D Faces. The XYZ coordinates of the object endpoints are used to define surface points.
- Polyfaces. The XYZ coordinates of the object endpoints are used to define surface points.
Note: Optionally, when adding lines, 3D faces, and polyfaces, you can maintain the original AutoCAD object edges as surface triangle edges.