Mastering AutoCAD Civil 3D 2008
Full of advanced techniques and insider tips, this tutorial-based guide will help you understand concepts, create perfect designs, and manage every stage of the project.
TABLE OF CONTENTS Mastering AutoCAD Civil 3D 2008
Refining and Editing Surfaces
Once a basic surface is built, and, in some cases, even before it is built, we can do some cleanup and modification to the TIN construction that make it much more usable and realistic. Some of these edits include limiting the input data, tweaking the triangulation, adding in breakline information, or hiding areas from view. In this section, we'll look at a number of ways to refine surfaces to give us the best possible model from which to build.
Surface Properties
The most basic steps we can perform in making a better model are right in the Surface Properties dialog. The surface object contains information about the build and edit operations, along with some values used in surface calculations. These values can be used to tweak our surface to a semi-acceptable state before more manual operations are needed.
In this exercise, we'll go through a couple of the basic surface-building controls that are available. We'll do them one at a time in order to measure their effects on the final surface display.
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Open the Surface Properties.dwg file.
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Expand the Surfaces branch.
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Right-click EG and select Surface Properties. The Surface Properties dialog appears.
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Select the Definition tab. Note the list at the bottom of the dialog.
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Under the Definition Options at the top of the dialog, expand the Build option.
The Build options of the Definition tab allows us to tweak the way the triangulation occurs. The basic options are:
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