Use the Add Breaklines dialog box to create a non-destructive breakline from either a grading feature line or an open or closed AutoCAD object.
When defining a non-destructive breakline, surface points are created at each vertex of the object and at each intersection of a surface triangle edge and the non-destructive breakline object. The new points create additional surface triangles. Non-destructive breaklines are often needed when deleting surface areas where a clean TIN edge does not exist.
The elevation for each new point is extracted from the original surface triangle, therefore maintaining the integrity of the original surface.
To add non-destructive breaklines
- In Toolspace, on the Prospector tab, expand the surface Definition collection, right-click
, and click Add. - In the Add Breaklines dialog box, enter the breakline description in the Description field.
- From the Type list, select Non-destructive.
- If the object from which you are creating a breakline has curves, enter a value in the Mid-ordinate distance field or click
to digitize a distance in the drawing area. - Click OK.
The Add Breaklines dialog box closes. A message appears prompting you to select an object.
- In the drawing area, select the objects.
- Optionally, select other objects or press Enter to end the command.
The breakline is created and added to the surface Breaklines collection in the Prospector tree.
NoteThe Description column in the Prospector list view displays the ID of the breakline that was added to the surface. To view information about the breakline vertices, open the Breakline Properties vista. For information, see Viewing Breakline Information
