| From the Modify
=> Edit Strings menu,
select Create a Boundary around a Model...
From the Create Boundary, Select Model panel, supply
the source model and appropriate masking. Because the default Boundary
Option is Auto Boundary, MX automatically seeds a boundary string,
displays it in the graphics window, and cross hatches the area bounded by the
string. If desired, select an alternative Boundary Option:
- Auto Boundary MX creates a boundary
string automatically. (Default option)
- Create New Boundary Create a
boundary string using the Create a String Dynamically tool.
- Use an Existing Boundary Select
an existing boundary string. This option is documented, however not
available.
Auto Boundary is the option that takes
advantage of the seeding algorithiums. Use the Trimming Tool
to trim the boundary.
The Trimming panel offers two options for
controlling the trimming.
- Trim Method Either Trim All
or No Trim. With the Trim All method, the trimming
sensitivity can be controlled by the Length of triangle side
slider. A shorter triangle side will tighten the boundary string.
- Remove Triangles This allows
manual elimination of triangles used to define the boundary. Select
from:
- Single Triangle Click an
individual triangle inside the boundary on the Graphics Display to exclude
that triangle from processing.
- Enclosed Hole Click inside any
closed string in the source model to exclude all triangles within the
string (such as a building). A shorter triangle side will tighten
the boundary string.
- Crossing Click and drag to
create a line which crosses all the triangles you wish to move.
Close the Trimming panel after a
satisfactory trimming, this returns you to the Create Boundary, Select
Model panel. Select Next at the bottom of the panel.
From the Create Boundary, Store Boundary
panel, supply the Model Name and String Name to store the
boundary string. Check the Display Boundary box to display the
new boundary string. Select Finish to complete.
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