TRIM SURFACE
This function allows the user to trim out a portion of a selected surface within specified inner and outer boundaries. The work is completed using the TRIM SURFACE window.
1. Select SELECT SURFACE to copy.
2. Select an existing closed curve as trim line.
3. If there is no existing line, EXIT and select DEFINE CURVE.
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4. DEFINE TRIM LINES is displayed. See Figure 6.2.5
Select one of the curve types: line (polygon), circle, spline curve, and intersection line.
Select CLOSED or OPEN to close the defined line automatically or leave it open.
Select points on the surface to form a line.
If the type is CIRCLE, a circle will be formed and shown after two points are selected. The first point is the center and the distance between the two points is the radius. At this time COORDINATE button is able to use and allows user to select or define a point.
If the type is a LINE or SPLINE CURVE, the user needs to pick a sequence of points and select DONE to complete the definition and to show the line.
If the type is INTERSECTION LINE, no point needs to be actually selected, but the user has to choose another surface to define the intersection line.
During the point selection, the user can select REJECT POINT to deselect the last selected point.
After the curve is defined, select DONE
5. After the curve is defined or selected, select EXIT. The window as Figure 6.2.6 appears.
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If select YES, the inner boundary of selected/defined line is trimmed out; If select NO, the inner boundary of selected/defined is kept.